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It is understood that in September 2017, the total output value of Japanese knives is about 34.143 billion yen, which is an increase of 8.4% from 315.04 billion yen in August, compared with 32.596 billion yen in the same period in 2016.

In addition, in the third quarter of 2017, the total number of Japanese carbide cutter output was about 99378 million yen, a 3.8% increase from the previous month, with the carbide cutting tool of 67.959 billion yen and 19.5%. High-speed steel tools were 218.88 billion yen and 28.2 percent less. Diamond cutter 28.8.3 billion yen and 12.2%; The cubic boron cutter was 6648 million yen,up 15%.

In September, the output value of Japan's carbide cutting tool was 23.271 billion yen, up 1.08% from the previous month and 20% year-on-year. The production value of high-speed steel tools was 75.79 billion yuan, up 9.1% from the previous year and 26.6% year on year. Diamond tool output is 10.07 billion yen, up 14% from the previous year and 10.3% year on year. Cubic boron cutter is worth 22.86 billion yen. Growth was 11.7 per cent quarter-on-quarter and 16.4 per cent year-on-year.

In the first nine months of 2017, the total number of Japanese bladeproduction was about 295.31 billion yen, up 0.2% year on year. Among them, the accumulative total of hard alloy knives is 14.5 billion yen and 14.5%. High-speed steel cutter 66.28 billion yen and 28.5%; Diamond cutter 8435 million yen and 6.7%; Cubic boron cutter was 19348 million yen and 5.3 %. It appears that the high speed steel cutter is a significant drag on the growth of the entire tool industry.

High speed steel cutter is a kind of toughness than ordinary knives, easier to carbide cutting tool, used to drill, tap, saw blade and hob, pinion cutter, broach and other precision cutting tools, especially suitable for manufacturing complex thin blade and impact resistance of metal cutting tools. In 1923, the emergence of the carbide makes the cutting speed increased to more than one hundred meters to hundreds of meters per minute, and its hardness is higher, which can be processed by high speed steel cutting materials, and with the constant improvement in recent years, the performance of cemented carbide, carbide cutting toolsgradually eroded the market share of high speed steel tools. Then there are more advanced cutting tools, such as ceramics, cubic boron and synthetic diamond, and they are more rigid and resistant than hard alloys.

High speed steel tools have excellent strength and toughness, while tungsten carbidecutting tools are superior in hardness and red hardness (the ability to maintain hardness under the cutting temperature). Generally, the cutting speed of the solid carbide tool can reach at least four times the cutting speed of the high speed steel cutter, and the tool life is longer. However, compared with high speed steel tools, the fracture toughness of hard alloy cutter is poor, which limits its application in certain machining areas, especially tapping.

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Carbon and graphite compounds are used for standard bearings, which have excellent corrosion resistance when working in most liquid environments.

Some liquid containing solid abrasives will hinder the binder or process and affect the use of graphite bearings. Alternative materials in this case, such as:

silicon carbide

Carbon graphite

alumina

Cemented carbide bearings

A cemented bearing is a bearing made from a hard alloy. Tungsten carbide bearing has the characteristics of super high wear resistance and high impact resistance. The surface and inner hole of the cemented carbide bearing can achieve the mirror effect.

Carbon graphite bearing

Carbon graphite is a kind of graphite bearing material with high temperature resistance and certain self lubricating function. Its most significant advantages are high temperature stability and strong chemical corrosion resistance. In the early stage of development of graphite bearing, especially in strong corrosive medium or high temperature environment, carbon graphite has been used as bearing material and has been applied to some extent. With the progress of the powder metallurgy industry and the maturity of the impregnation process, the new impregnated graphite bearing has gradually replaced carbon graphite with its excellent properties.

Although the pure carbon graphite corrosion resistance and high temperature resistance is relatively high, but as bearing materials, flexural strength, compressive strength and its impact performance is poor, this is mainly due to its relatively large porosity (about 10% ~20%), and these are not impregnated filling holes, there is no play the reinforcing effect. But in some special occasions, the working medium is strongly corrosive, or because of the size of the structure, it is impossible to set up the heat shield without shielding the load.

Silicon carbide bearing

Carborundum belongs to ceramics, and most of the general ceramics now refer to ceramics other than carbon. Such ceramics are mainly Si3N4 and SiC, and their hardness is very high. The hardness of the SiO2, whose composition is mainly composed of sediment (HV800~1 000), is higher. Therefore, it has strong adaptability to impurities. The disadvantage is that the impact resistance is poor, but the measures can be taken to a certain extent according to the bearing structure.

Imported silicon carbide has been applied in many fields because of its high hardness, high temperature creep, high wear resistance, corrosion resistance and oxidation resistance. Silicon carbide can be divided into three kinds, such as high pressure sintering, pressure free sintering and reaction sintering, according to the different sintering methods. At present, the pressure free silicon carbide (SIC) has been widely used in shielded motor because of its high wear resistance and low friction coefficient. Under the condition of water lubrication, silicon carbide can produce a film of silicon dioxide and silica gel on the surface to further reduce the friction coefficient. The silicon carbide itself has the function of self lubrication, which is suitable for the material of friction. However, because of the high hardness of silicon carbide, the impact toughness is relatively low, and the fracture toughness of SiC without pressure sintering is only about 3~4MPa. M1/2. It is not suitable for the shock vibration condition, the silicon carbide as bearing material used in motor, in addition to the selection of spraying surface (or welding) of tungsten carbide grinding parts as friction pair, but also for special design in structure, set up special measures should be to force groove, to prevent silicon carbide by the impact have broken. At the same time, when silicon carbide is used as a bearing material to shield motors, the conveying medium must be clean and free of impurities, and requires stable operation and no vibration. Therefore, silicon carbide as a bearing material has greatly improved the friction life of tungsten carbide bearings. However, under the condition of high reliability, especially the shielded motor used for military and nuclear power, there are few uses of silicon carbide as bearing material, and the reliability needs further study.

Alumina bearing

This material is very similar to silicon carbide in abrasion resistance and corrosion resistance. However, it is also easily affected by the temperature adjustment and the impact of the operation of the machine.

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Hot spraying ceramic powders include oxide, carbide, boron, nitride and silicide, which are crystalline or non-crystalline compounds of metallic elements and non-metallic elements. Ceramic coating has the characteristics of high melting point, high hardness and good wear resistance, corrosion resistance and high temperature stability. However, the coating process is complex, the cost is higher, and the coating surface is prone to crack, the thermal fatigue performance is not as good as the metal coating. Moreover, the coating has poor toughness and can not be used to withstand large impact load. Currently, the commonly used ceramic coatings are A12O3, TiO2, Cr2O3, ZrO2, WC, TiC, Cr3C2, TiB2, etc., which are usually prepared by plasma spraying, flame spraying, HVOF and explosive spraying technology.

Plasma spraying A12O3-40% TiO2 and Cr2O3 sliding friction and wear properties of ceramics powder coating is pointed out that the wear resistance of coating Cr2O3 higher than A12O3-40% TiO2 coating, the wear mechanism of Cr2O3 coating are mainly abrasive wear and tear, under the large load, Cr2O3 coating wear characteristics of brittle fracture. The abrasion mechanism of a12o3-40% TiO2 coating is mainly characterized by plastic deformation and laminar stripping. Study of A12O3 plus TiO2 and NiCrAlY composite ceramic coatings, due to the melting of TiO2 and A12O3 formed a certain degree of miscibility, can decrease the coating porosity, further improve the strength, toughness and wear resistance of the coating.

Lin et al. studied the wear and tear characteristics of plasma spraying multi-layer metal and ceramic coating. The thermal spraying sequence was first sprayed on the base with NiCr on the bottom layer, then the nicr-cr2o3 transition layer of different proportions, with a surface of 100% Cr2O3. It is found that the transition layer of suitable metal and ceramic ratio can improve the wear resistance of the coating. The main wear mechanism of coating is brittle fracture, abrasive wear, adhesion and oxidation wear.

Metal and the excellent properties of ceramic materials have their unique and significant performance weakness, how to put the metal and ceramic materials combine their advantages performance, has been the direction of materials science and engineering research. Metal ceramic composite hot spraycoating technology, namely in the plastic substrate evenly distributed on the particle shape and size of the appropriate size ceramic phase, successfully integrate the advantages of metal and ceramic, the preparation of both strength and toughness, metal and ceramic advantages of high temperature resistance, wear resistance, corrosion resistance of composite materials, greatly expanded metal materials and ceramic materials, their application scope, in aviation, aerospace, chemical, mechanical, electrical and other industrial applications successfully. The most widely used metal ceramic coatings in industry are: Cr3C2- NiCr, WC- Co. HVOF, plasma and explosive spray are used in the process.

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The surface wire drawing process is usually the manual drawing and mechanical drawing.

As , hand-drawn wire is generally aimed at small workpieces, which have a certain shape of workpiece, and the grinding products used are usually industrial baijie. This kind of wire drawing method has low production efficiency, the line effect is unstable, so it is not mainstream in industrial production, the mainstream is mechanical drawing.

The advantages of mechanical drawing are fast, high degree of automation, and stable and controllable drawing effect. Mechanical drawing is mainly divided into flat - pressed abrasive belt drawing, wire - contact abrasive belt drawing, non-woven roller drawing.

First of all, we introduce the flat - pressed sand strip. The workpiece on the fixture, start the sand machine, abrasive belt high-speed rotation, and then, on the back of abrasive belt with a controlled, can be up and down, left and right sides of mobile press block, but briquetting press, abrasive belt can stick take in wire drawing workpiece surfaces. This kind of mechanical drawing method is a flat wire drawing, which can not have any convex point on the surface of the drawing. It is characterized by a continuous line pattern, long.

Wire contact sand drawing is a traditional drawing method. In different places, the surface of the contact surface of the sand belt is accomplished through the contact wheel instead of the specially designed pressure block. So the workpiece is in contact with the sand, point, line contact, not surface contact. So, even with the same sand belt, there is a distinct difference between line contact and surface contact method.

In addition to the two kinds of mechanical methods used in the use of abrasive belt, there are also non-woven roller wire drawing process. As I said, the non-woven material is also a good material for drawing. Non-woven material is elastic and has a special three-dimensional network structure, so it is commonly used as a wheel. Since the elastic ratio of non-woven material is better than sand belt, it has better surface fitting and is suitable for machining some curved parts. In addition, since the non-woven roller and workpiece are line contact, the surface contact of the peaceful pressure type abrasive belt drawing is less heat and is cold machining.

The above three types are commonly used in industrial production. In practical application, according to the different shape of the workpiece, the different line, and centerless grinding wiredrawing, static drawing several ways, such as but as a result of application is not wide, does not make the detailed discussion here.

To sum up, wire drawing process is a complicated and complicated process. It's difficult is not whether can pull wire lines, but in the case of the customer designated line effect, how to use the hands of the grinding materials, machinery and equipment, how to set the grinding parameters, etc., to pull out the high similarity of lines. Therefore, if you want to satisfy your customers, you should pay more attention to the new types of grinding products in the market, besides the type and performance of the machine.

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A typical machining shop may consume thousands of cutting inserts per year. An operating worker may use many cutting inserts daily, but never think about the complex scientific knowledge behind the inserts. c, for the proper use of tools and performance optimization will be of great benefit.

Composition of Carbide blades

As with all man-made products, manufacturing cutting inserts first addresses the raw material problem of determining the composition and formulation of the insert material. Most of today's blades are made of cemented carbide, whose main components are tungsten carbide (WC) and cobalt (Co). WC is a hard particle in the blade, while Co acts as a bond to shape the insert.

Carbide cutting blades performance applications:

Carbide cutting blades, carbide blades, which is a powerful modern manufacturing equipment processing equipment, carbide cutting blades, carbide cutting tools with its excellent performance as a super-hard cutting tool in the most competitive products, as a Carbide cutting tool, it is a wealth weapon, widely used in manufacturing now. China xiamen Tungsten Technology Co., Ltd., tungsten carbide professional manufacturer, to provide all kinds of carbide cutting blades, carbide shaped custom-made tools customized service.

Carbide cutting blade Product features:

Our company has a complete industrial chain of cemented carbide, carbide production technology for many years based on, combined with rich experience and production and processing equipment to market-oriented customer demand-oriented, in order to achieve and meet the customer value for the goal, there is a Customers need to provide custom carbide cutting blades customized services to customer drawings or sample data as a reference to the specific requirements for the purpose and dedication to meet the customer's use of carbide cutting blades. My company in accordance with customer requirements produced by carbide cutting blades to ultra-fine particles of high-quality tungsten carbide raw materials for the substrate, after high-precision processing equipment refined, with good toughness and service life.

development trends

According to the needs of the development of the manufacturing industry, multi-function compound knives, high-speed and efficient knives will become the mainstream tool development. In the face of the increasing number of difficult-to-machine materials, the tooling industry must improve the tooling materials, develop new tooling materials and more rational tooling structures.

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We know that the carbide drillsbit can greatly improve the productivity and reduce the cost of each hole processing. CoroDrill 860 is the most rapidly cutting solid carbide drill bit in the market, mainly used for drilling of steel. The drill is well suited for conventional drilling, chamfering hole, inclined surface drilling, drilling cross hole, diamond laminated plate and concave surface borehole etc. In the aspect of hole processing performance, CoroDrill 860 is a new revolution. CoroDrill 860 bit of optimized design, can achieve much more than many of the common drill hole penetration rate and the processing safety - which means that it has the strength to improve reliability under the highest cutting parameters.

This kind of drill is specially designed for machining steel parts, which is suitable for machining of conventional drilling, chamfering, inclined surface, cross hole, pile drill and concave/convex surface. When using high cutting parameters for long or short cutting materials, this kind of carbide drill cuttings control is excellent and can achieve consistent and unfault-free drilling.

And processing all kinds of steel materials under high cutting parameters when chip control is very good, because CoroDrill 860 bit unique channel combined with a new chip groove, even under very high penetration rate can be achieved efficiently chip removal, it ensures the efficient and safe drilling.

The small features of the 860 cutting force of CoroDrill mean that the load on the cutting edge is also small, which is not easy to be problematic when the parts or thin-walled parts are poorly processed. Currently available, 3 ~ 8 times the diameter of the gage length range bit, chip can be used in long and short of scrap materials processing, such as alloy steel, low carbon steel, low alloy steel, high alloy steel and steel castings, etc. The standard diameter range is 3 ~ 20 mm, and the obtained hole tolerance is 8 ~ IT9.

Summary CoroDrill 860 solid carbide drills

The technical features of the head are as follows:

Unique new cutting edge shape can reduce cutting force and improve chip control.

The chip groove shape optimizes the chip forming, which improves the chip flow and chip removal.

The high toughness new tungsten carbideextends the cutter life;

The blade handle can control wear and provide higher reliability;

The enhanced bit round Angle improves the strength and the processing safety.

CoroDrill 860 reduces the processing cost of each hole, improves performance reliability, can achieve higher cutting parameters, and optimizes the performance of chip removal. Long tool life, wear and control.

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The old precision casting method USES the fractional crystallizer, especially when casting flat ingots. The water jacket and the crystallizer are separate. With the development of casting technology, the crystallizer of modern precision casting method is one. Use old mold casting cooling water consumption is large, when because the old mould water supply is not closed, open fire and not part of the cooling water cooling, and a cooling and cooling of the secondary cooling intensity difference, inevitably produce some casting defects; And when the modern crystallizer is cast. Cooling water consumption is small. It has been proved that it is only about 70 percent of the amount of water used in the old mold. Currently abroad with low liquid level casting crystallizer, its purpose is to improve the cooling intensityof aluminum carbide, reduce or eliminate a cooling after the heating phenomenon of the air gap area, so almost no secondary cooling quenching condition, flat ingot casting ordinary have mould height fell to 100, of course, this requires the operator has a high operating level or add white liquid level control system.

The cooling water temperature requirement is not negligible. Normally, the cooling water temperature is set at 20, but due to regional climatic conditions. The conditions of water supply facilities and the temperature of plant are different, so the quality defects of ingots are found in regional or seasonal ingots. Modern mold water supply system with pulse or cross disguised form function, are determined by the process of programming, so the cooling intensity can be set according to the casting technique for the curve, especially for some bad cold plastic and aluminum carbide, precision casting when cold crack and thermal cracking is almost at the same time, additional water retaining plate system, make the ingot surface temperature to the plastic tensile deformation temperature, eliminate cold cracks ingot casting, craft to take measures to prevent the hot crack, which can obtain high quality ingot.

Cooling intensity is also known as cooling speed. The cooling strength not only influences the crack of precision casting, but also influences the structure of the ingot, and increases the crystallization speed of the ingot as the cooling intensity increases. As the cooling intensity increases, the ingots are shallow. The bridge is shrunk in size. The metal shrinkage condition is improved, and the defects such as loose and porosity are eliminated or eliminated. Increase of ingot density: the size of a compound can be refined and the degree of regional segregation can be reduced.

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Carbide blades are composed of metal alloy powder, with more than 100 tons of press molding, and then through high temperature sintering. This is common with our top stone after long-term exposure, exposed to wind and rain, a large stone into numerous small stones and loose "weathered" process, so the alloy blade is very fragile, but also because of this principle.

To meet the requirements of a specific application, this product design not just adjust the number of cooling holes on blade. HPG provides a new groove, cemented carbide material - high wear resistant KCP15A material, this product is designed for steel material processing design. Compared with similar bit products, its latest design of self centering point angle and horizontal edge design can ensure the positioning accuracy and the hole verticality better, even in the case of high feed under. The slight chamfer fillet area of blade protection design, can reduce the edge chipping phenomenon, using the same design enhancement, HPG slot type products and therefore suitable for processing the hydraulic manifold application of common intersection and cable outlet, or processing heat exchanger in the production of stacked plates.

If the world only hole processing and application of steel materials, HPG groove blade should be sufficient to deal with, but the aerospace industry still needs processing of stainless steel and superalloy materials, automobile manufacturers of cast iron materials but also has a wide range of needs. For the former, the Kennametal Inc provides HPL slot type products, the design of split point of this product, can reduce the cutting force in the aerospace industry, medical equipment and materials processing alloy cutting long chips. And HPG is the same, this product also provides new materials, such as KCMS15, this is the fine grain cemented carbide material products a high abrasion resistance, corrosion resistant coating with AlTiN, can prolong the service life of the cutter. For cast iron, ductile iron and vermicular cast iron, four blade and round groove using HPC drill design, can avoid retracting common processing of these materials when chipping and cracking phenomena, the groove design of the special combination of rake face cooling hole design, the chip can be rapidly discharged.

All of these carbide blades adopt the drill point angle design of 143 degrees, through a special edge processing, polishing, or cutting edge rounding processing, ensure the optimization of tool life. The use of HPG, HPC, and HPL groove, KenTIP FS can be a variety of applications to meet the demand of the whole hard alloy drill processing, but its work unit cost is much lower, the performance is comparable or even better, Schmitt said.

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Tungsten steel cold extrusion dieis one of the fastener moulds, including processing technology "cold extrusion", is the metal blank in cold extrusion cavity, at room temperature, through the press fixed punch pressing blank to make metal blank parts made by plastic deformation processing approach.

Cold extrusion is at room temperature to plastic deformation of metal material, the unit extrusion pressure is quite big, at the same time due to the turbulent flow of metal materials produced by the thermal effect can make the mould work part temperature as high as 200 ℃ above, plus the severe wear and repeated actions of load, the mould are harsh working conditions.

Therefore, the cold extrusion dies of tungsten steel should have the following characteristics:

1. The mould should have sufficient strength and rigidity to work under the stress of cold and heat.

2. The parts of the mould shall have high strength, high hardness, high wear resistance, and certain toughness;

3. The geometrical shape of convex and concave modes should be reasonable, and the transition should be made to avoid stress concentration by using a large smooth circular arc.

4. Easy to replace the vulnerable parts of the die, and the interchangeability and universality of different extruded parts;

5. In order to improve the strength of the mould work, the concave mode is usually used in the prestressed combination of the concave mould.

In the guide pin, guide sleeve is tungsten steel mold standard parts, guide pin, guide sleeve is the main structure for different diameter of concentric cylindrical surface, the choice of material according to the requirements of the guide pillar structure size and material, directly select the appropriate size of hot rolled round steel as the blank material, after carburizing and quenching, in grinding.

The guide post of thetungsten steel mould is mounted on the mould seat. The guide sleeve is mounted on the upper module. The clearance between the guide column and the guide sleeve is smaller than that of the punch and the die.

The requirements of tungsten steel mould guide material:

Tungsten steel mold guide post heart requires good toughness, generally selects for 20 carbon steel material, blanking length should be considered when turning the clamping length, cylindrical stay 3-4 mm cutting allowance, after turning the external cylindrical grinding allowance should be 0.5 mm, permeable zone depth of 0.8 1.2 mm, surface hardness after quenching for 50 to 55 HRC, outer grinder or universal cylindrical grinding machine grinding, grinding should leave after grinding allowance of 0.01-0.01 mm, for the purpose of grinding process is to further improve the quality of roller surface, in order to eliminate the heat caused by neutral hole defects such as deformation on both ends of the guide post, guide pin hole in the center of the heat treatment should be revised, so that a clamping will guide post two cylindrical surface grinding out, to ensure the alignment of a cylinder.

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Carbide punch diesis a special process equipment which is used to process materials (metal or nonmetal) into parts (or semi-finished products) in cold stamping process, which is called cold stamping die (commonly known as cold carbide dies). Stamping is a pressure processing method to obtain the required parts by pressing the material at the room temperature with the die installed on the press so that it can produce separation or plastic deformation. This paper introduces the selection of stamping die material and the influence of die manufacturing process on the service life of carbide punch dies.

Selection of blanking die materials

The blanking die material should consider batch workpiece production, if the volume is not high there is no need to select the life of die material; should also consider washed workpiece materials, different materials for the mould materials are also different. For punching die, wear resistance is an important factor in determining the die life, depends on the wear resistance steel carbide in hard phase condition and matrix hardness, both higher hardness, the more the number of carbide is better wear resistance. The inferior and common stamping die steel wear resistance are carbon tool steel alloy tool steel - steel - steel - Gao Tangao matrix of high speed steel - steel bonded carbide - tungsten carbide.

In addition, the influence of the thickness, shape, size and precision requirement of the workpiece on the choice of the mould material must be considered.

1. traditional die steel, for a long time, the domestic sheet blanking die steel for T10A, CrWMn, 9Mn2V, Cr12 and Cr12MoV, etc..

Among them, T10A is carbon tool steel, with certain strength and toughness. But the wear resistance is not high, the quenching is easy to deformation and cracking, hardenability is poor, only suitable for the workpiece shape is simple, small size, small number of blanking die.

The heat treatment process of T10A carbon tool steel is: 760~810 degree of water or oil quenching, tempering at 160~180, hardness 59~62HRC.

CrWMn and 9Mn2V are high carbon and low alloy steel. Quenching is easy to operate, hardenability is better than carbide punch dies, deformation is easy to control. But the wear resistance and toughness are still low, and it is applied to the medium batch, the workpiece shape is more complex blanking die. The heat treatment process of CrWMn steel is as follows: quenching temperature 820~840, oil cooling, tempering temperature 200, hardness 60~62HRC. The heat treatment process of 9Mn2V steel is as follows: quenching temperature 780~820, oil cooling, tempering temperature 150~200, air cooling, hardness 60~62HRC. Attention should be paid to tempering brittleness and significant volume expansion at tempering temperature range of 200~300.

Cr12 and Cr12MoV for high carbon high chromium steel, high wear resistance, quenching deformation is small, good hardenability, mold used for mass production, such as carbide punch dies. However, the carbide of this kind of steel is uneven, easy to produce carbide segregation, and it is easy to break or break during cutting. Among them, carbon content of Cr12 is higher, carbide distribution is more serious than Cr12MoV, brittleness is greater.

Require the use of the heat treatment process of Cr12 steel depends on the choice of the mold, when the mold requirements relatively small deformation and toughness, the low temperature quenching and tempering (Cr12 950~980 DEG C for quenching, tempering; 150~200 C Cr12MoV 1020~1050 C 180~200 C quenching, tempering). If you want to improve the temperature of the mold, improve its hardenability and hardness, can be made of high temperature quenching and tempering (Cr12 1000~1100 DEG C for quenching, tempering; 480~500 C Cr12MoV 1110~1140 C 500~520 C quenching, tempering).

High chromium steel is temper brittleness in the 275~375 C region should be avoided.

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Black tungsten is the main ore that is refined tungsten, also known as tungsten manganese iron ore. Because of the different proportions of ferrotungstate and manganese tungstate, if the iron content is higher, some of them are called tungstenite, and some of them are called tungsten manganese. The black tungsten deposit is brown to black and has metallic or semi-metallic luster. It is commonly found in granite and quartzite. The south of China's jiangxi province, the eastern part of hunan province and the north of guangdong province are the world's most famous areas of the black tungsten mine. The black tungsten deposit is produced in high temperature hydrothermal quartz vein. China's southern jiangxi, eastern hunan, and northern guangdong province are the world famous black tungsten mines. Other major areas include Siberia, myanmar, Thailand, Australia and Bolivia. it is the most important mineral material for tungsten refining.

The black tungsten carbideand tungsten manganese ore are mainly produced in the quartz vein of high temperature hydrothermal quartz and its yunying lithosphere. Veins often exist in the granite intrusion at the top or near contact zone of surrounding rock, mineral association of cassiterite, molybdenite, bismuthinite, pyrite, chalcopyrite, arsenopyrite, topaz, beryl, tourmaline, etc. Tungsten and manganese minerals can also be found in medium and low temperature hydrothermal veins.

Brittle wolframite and easy smash, produced in the process of development and utilization of a large number of black tungsten fine mud, according to a 2010 survey data, at present our country's tungsten ore concentrator fine clay content is between 3% and 17% of total capacity, metal content accounts for about 5% of the total amount of metal - 5% every year in China alone, nearly 245000 tons of tungsten content of fine clay, tungsten fine clay mineral average job recovery is only about 40%.

Before the application of new technology, the fine tungsten mud concentrator has been using shaking table re-election + blanket cloth trough LiuCheng recycling black tungsten fine mud of tungsten, tungsten concentrate containing WO3 9%, the average recovery was 40%, including S 10%, including the As 5%, because of the low grade and impurity to exceed bid, is difficult to direct sales.

Aiming at these problems, study the pulsating high gradient magnetic separation - suspension vibration separator enrichment of preclassification table re-election joint process new technology of recovery of fine mud black tungsten, greatly improved the black tungsten fine clay ore dressing indexes. The technology industry in tungsten successful implementation, built YiTiao annual capacity of 45000 tons of production lines, since 2013 has remained steady production, concentration of tungsten concentrate containing WO3 increased by 20%, recovery rate increased by 40%, fine puree concentrate contains S reduced to < 1%, As low As < 0.5%, tungsten concentrate nearly 130 tons per year. After the implementation of the new technology, the economic benefit of the new technology was 213.987 million yuan in the two and a half years since 2013. Experts believe that in the results of the overall technology in the field of black tungsten fine clay mineral reached the domestic leading level, successfully solving the practical problems of enterprise production, has the very good reference to domestic similar enterprises.

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carbide milling cutter is made of materials refers to the use of cemented carbide carbide cutter. Understand the need to know what istungsten carbide, hard alloy with high hardness of refractory metal carbides (WC, TiC) micron powder as the main ingredient, with cobalt or nickel (Co) (Ni), molybdenum (Mo) as the binder, powder metallurgy products in vacuum furnace or hydrogen reduction furnace in sintering.

In the three edge milling cutter, milling or some surface milling, cutting force in different directions. Surface milling, milling cutter in the workpiece just outside the cutting force in the direction of more special attention should be paid. When the milling, the cutting force will work pressure to the work table, cutting force inverse milling workpiece and left the table.

As the cutting effect of progressive milling is the best, milling is usually preferred. Only when there is a screw gap in the machine tool or a problem that can not be solved by forward milling, reverse milling is taken into account

In an ideal situation, the diameter of the cutter should be higher than the width of the workpiece, cutter axis and workpiece center line should always leave some distance. When the tool is placed on the center of cutting, easy to produce burr. Continuous cutting edges entering and withdrawing from cutting when the radial cutting force direction will change, and it may damage the spindle vibration the blade may be broken, the surface will be very rough, with slightly off center, cutting force direction will not change anymore -- cutter will get a pre load. We can put the center of milling to drive on the road.

Every time into the carbide cutting cutter, cutting edges are subjected to impact load, transverse load depends on the size of the chip, workpiece material and cutting type. Cutting, between the cutting edge and the workpiece is correctly occlusion is an important direction.

When the cutter axis is completely on the lateral width of the workpiece, the impact force at the cut in is borne by the outer blade tip, this will mean that the impact load from the initial part of the most sensitive tool to bear. The last and carbide cutter to the tip off the workpiece, that is to say from the beginning to leave the cutting blade, cutting force effect has been on the outside of the tip, until the impact unloading so far. When the center line of the cutter is located in the edge line, when the chip thickness reaches the maximum when the blade from the cutting load, reaches the maximum at the cutting impact. When carbidemilling cuttersaxis line is located within the width of the workpiece, the initial impact load when starting position the distance along the cutting edge by far the most sensitive point in the back and bear, knife blade smooth exit cutting.

For each blade, when to exit when cutting off the workpiece cutting edge way is important. The remaining close when retracting materials may be much reduced. When the blade gap chip from the workpiece along the blade rake surface will produce an instantaneous tensile force and burrs on the workpiece. This often produces the tensile force in dangerous situations endangering the cutting edge.

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In the new world economic integration wave, the acceleration of global manufacturing to the mainland of China has been a trend, and China will gradually develop into a world-class manufacturing base. The obvious advantage of guangdong, especially the pearl river delta region, we will develop into a global mold production center within ten years. The cutting tool market is in a period of rapid development, and simple tools are being replaced by more and more multifunctional tools. In the production of the future, the user will be on the research and development of cutting tools is put forward higher request,itis not only in the field of cutting tool materials and surface coating technology, but also for cutting tool production technology will have more strict requirements.

Carbide can also be used to make the drilling tools and mining tools, drilling tools, measuring gage, wear-resistant parts, metal abrasive, cylinder liner, precision bearings, nozzle, hardware mold (such as wire drawing die, bolt moulds, nut moulds, as well as a variety of fasteners, mold, excellent performance of cemented carbide gradually replaced the previous steel mold).

The worldwide demand for carbide cutting tools is growing. Among them,the growth of European and north American countries is stable, especially in eastern European countries. Asian markets have recovered slightly and the market potential is large, and the market of Latin American countries has grown significantly, especially in Mexico. Cutting tool market demand growth slowly, mainly because of cemented carbide tool life increased, then there is the user request, for the whole manufacturing process instead of many machine tools and cutting tools. As well as the use of multi-function knives, a lot of simple cutting tools have been replaced.

According to statistics, the production of tungsten carbidecutter in China is increasing year by year, making carbidecutting tool material enter the development era represented by tungsten carbide. According to the current situation of China market, the market share of domestic carbide turning tool is lower than that of imported tools, so it is urgent to adjust the industry structure.

Our country has entered the stage of manufacturing industry to upgrade, the state planning to high-end equipment manufacturing and information industry into the pillar industry of national economy, which will greatly promote the carbide blade, cutting tool market demand, the cemented carbide industry promising prospects.

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The design of the carbide nozzle is sintered according to the heat pressure of the hole and the hot straight hole. In the process of machining, precision grinding and surface treatment must be done to achieve the roughness of the hole roughness of Ra0.1 and r0.025. There is a scientific design of radius of curvature at two entrances.

Generally speaking,the shape of the design hole of the carbide nozzle is determined by the airflow pattern. Hard alloy nozzles generally have straight holes and perforations.

With the development of the oil industry and the increasing demand for energy, the technology related to oil drilling has been continuously promoted. Early oil drilling mainly USES human impact drill, mechanical cable drilling, rotary drill and so on, in the selected surface position of a certain diameter of the cylinder hole to the underground oil and gas layer. This type of high pressure air drill, drill hole drill and cone drill can be used with carbide ball tooth to improve the drilling efficiency and prolong the life of the drill bit. At present, the researchers have found a more effective high pressure abrasive jet technology for deep and marginal oil reservoirs. High pressure abrasive jet in high pressure water jet as the carrier, add a certain amount of abrasive particles, the impact of jet is greatly ascend,whichalso make the rock cutting efficiency is greatly improved, has a wider application prospect.

In the high pressure abrasive jet, a hard alloy nozzle is played. It has high hardness, high strength and excellent abrasion resistance. Usually in the process of drilling, usually in a high confining pressure conditions, thus the nozzle in the working process of the need to bear the high speed impact of high pressure abrasive, thus more prone to wear and failure. Ordinary materials, such as steel nozzles, are prone to heat deformation or disintegration, which require frequent replacement of nozzles, thus reducing the efficiency of drilling. In particular, it is very inconvenient to remove the drill bit when deep drilling is carried out. In addition, the inlaying of hard alloy materials in the most vulnerable parts of the nozzle is also a method to improve the performance of the nozzle and prolong its service life. The tungsten carbide nozzles can further improve the hardness of the nozzle and the abrasion resistance by reducing the size of WC grain size.

That is an introduction to the design of tungsten carbide nozzle, you can choose according to their industry and environmental characteristics required for hard alloy nozzle in combination with its working principle and design factors to select and efficient industrial applications.

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Nowadays on the market is generally a bit alloy steel material whole carbide drills, although the materials are the same, but due to the processing technology, various brands of product quality disparity. Imported and domestic tungsten carbide drills are also very different.

In the mechanical processing industry, enterprises in the production management in order to improve production efficiency, reduce production costs, to ensure machining quality and stability and adequate tool life conditions, which can be achieved by improving the service life of carbide drill bits of hard alloy or improve production efficiency.

In the process of machining, drilling holes or drilling holes are often encountered on the surface or incline, and several cutters are used, which not only affect the cost of production, but also reduce the production efficiency. To this end, cobalt collar developed RT100P high-performance alloy bit, in order to better meet customers’needs.

As an important member of A-Brand products in the series, OSG ADF cemented carbide drill head has multiple functions, stable and high quality of hole machining. Usually, when milling flat bottomed holes, both milling cutters and drills are required. ADF can do one step processing, which can shorten the processing time and simplify the management of tools. And this carbide drills can balance the machining accuracy and reduce the displacement of the drilling hole. The utility model can be widely used in the processing of automobiles, moulds, and various mechanical components.

The cutting edge design ADF uses a sharp cutting angle design, so that in the case of low cutting force can minimize the reduction of material on the formation of burrs; have large chip removal groove, so as to achieve a smooth chip removal.

Patent coating ADF uses the latest patented coating EgiAs, OSG,even in the case of high temperature, this kind of carbide drill bitscan also achieve long life and low wear.

The design of cutting stability ADF can be applied to a wide range of machining conditions, including machining surfaces, surfaces, holes, eccentric holes, thin materials, etc.

Processing situation

The design of processing range ADF can be applied to a wide range of machining conditions, including machining surfaces, surfaces, holes, eccentric holes, thin materials, etc.. Applicable to a variety of common processing materials, such as carbon steel, alloy steel, hardened steel and cast iron of up to 35HRC. Standard type diameter from 2mm to 20mm, lengthened type directly from 3mm to 20mm.

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Blades are made of the world's hardest materials. Without blades, the world of metal cutting would be very different. The main components of cemented carbide inserts are tungsten carbide and cobalt with different proportions. The primary form of the material is powder. In containers weighing about 560kg, the ingredients are well matched and will be used to produce different powders. In the workshop, the dry material is mixed with a mixture of ethanol and water to form a thick, acid like gray paste. When the slurry is dried, the sample is sent to the laboratory for quality testing. These powders consist of many particles of 20-200 m in diameter, very tiny (a hair diameter is 50-60 m).

The powders are packed in a volumetric 100kg barrel and delivered to a stamping machine for making carbide inserts. The operator puts tungsten carbide dies (it is used for stamping different blades) into the machine tool and enters the order number into the computer, filling the mold cavity with the powder according to the order information. The pressure of each blade is as high as 12 tons. The machine tool will weigh each blade and the operator will observe and control it. At this stage, the blade is very fragile and easily ruptured.

The stamped blade needs to be heated to harden it. The job is done by a sintering furnace, which can handle thousands of blades at one time. The pressed blade powder is heated to about 1500 DEG C in the course of up to 13h and is melted into hard alloy. The shrinkage ratio in sintering process is about 50%, so the specification of carbide blade is only half of that before sintering.

Once again, in the laboratory, the top and bottom of the blade will be grinded to the required thickness. Because cemented carbide is very hard, it is necessary to grind it with industrial diamond.

When carbide blade reaches the required thickness, further grinding is carried out to obtain accurate geometry and size. The Kimmer factory staff by using 6 axis grinding plate to meet the stringent tolerance requirements.

After grinding, the carbide blades will be cleaned and coated. To avoid any grease or dust, gloves must be worn when handling the blade at this stage. The blade is placed on the fixture of the turntable and then fed to a lower pressure coating furnace. After coating, the blade shows different colors.

At this point, the blade has been produced, the staff will use the microscope for each batch of products sampling, to ensure that the quality meets the requirements. Before packing, the staff will check again one by one blade, and check the drawings and batch number, and then use the laser marker in carbide blades on the right material, the grey box blade into the label, you can put the blade delivery to the customer.

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cemented carbide cutter as a high-performance super hard tool, with the development of Chinese some of the domestic high-end manufacturing industry, has been used more and more widely, can be said that high-end manufacturing greatly promotes the development of cemented carbide tool.

Cemented carbide tools have now been coated with titanium carbide, titanium nitride, alumina hard layer or composite hard layer by chemical vapor deposition. The developed physical vapor deposition method can be used not only for carbide cutting tools, but also for high speed steel cutting tools such as drills, hobs, taps and milling cutters. As the barrier of chemical diffusion and heat conduction, the hard coating will slow down the wear rate of the tool when cutting, and the service life of the coated blade will be increased by more than 1~3 times compared with that without coating.

Due to the high temperature and high pressure, high speed, and working in corrosive fluids in parts, the application of hard cutting materials more and more, the automation level of machining and the machining accuracy of the increasingly high demand. In order to adapt to this situation, the development direction of the tool is the development and application of new tool materials; coating technology for the further development of the tool of vapor deposition coating, the higher hardness in the matrix with high toughness and high strength, better solve the tool material hardness and strength between the contradictions; the further development of the structure of indexable tool to improve the manufacturing precision of the tool; the quality of the products, reduce the difference, and the tool used to achieve the best.

First of all, as the mother of the manufacturing industry, the machine tool industry, especially the leap growth of CNC machine tools, will help to expand the market of machine tool carbide cutting tools. We know that a machine with more than a dozen or more kinds of tools, and knives are consumables, need to be replaced regularly, in order to ensure efficient production efficiency.

Secondly, the demand for carbide cutting tools, such as shield machines, is increasing rapidly in railway and urban rail construction. The cutter belongs to the consumable in the shield machine. The shield machine must replace one hob drill bit on average every 200 meters -300 meters.

Thirdly, the PCB sub industry will be maintained at an average annual growth rate of 9.3% over the next years and is expected to increase by nearly 4 billion yuan in the next 5 years.

Finally, the amount of drilling exploration and mining in the 60%-80% address through the completion of the cemented carbide cutters, with lower grade mines and increasing of mining depth, the average annual growth rate of 5 annual consumption is expected to maintain 30% mining carbide tools in future.

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