January 24, 2018
Application in various fields of tungsten alloy plates
Tungsten alloy plates are refractory metal, which have two-phase composites consisting of W-Ni- Fe or W-Ni- Cu or even W-Ni-Cu-Fe, some tungsten alloys also contain Coã€Moã€Cr, etc. Tungsten alloy can be machined into various shapes, such as rods, cubes, blocks, bricks, rings, plates, etc.
Applications for Tungsten Alloy Plate:
1) Sports goods: Professional tungsten alloy plate for darts benchmarking. The to fall series: the bullet type, type water, pipe type, half water droplets type, type cylinder have.
2) Counterweight products: High-density tungsten alloy plates with counterweight series: with the balance of mechanical hammer; Fly hammer; Oil drilling counterweight rod; Darts rod; Golf counterweight piece; The car counterweight piece; mobile phones, game oscillator; aerospace the gyroscope; The pendulum clocks; counterweight balance ball; Shockproof tool rod.
tungsten alloy plate
3) Electrical material: electrical discharge machining of electrode and resistance welding electrode; high proportion electrical contacts, air circuit breaker in the contacts.
4) High temperature alloy heat sink: due to high temperature resistant and good thermal performance, electronics industry isswitching to tungsten alloy plates as heat sink materials.
Tungsten Alloy Plate Introduction
Tungsten Alloy Plates properties
1, Width*Length: (2.0-250.0mm)*(2.0-250.0mm)
2, Thickness: 2mm-15mm
3, Density: 15.8-18.75 g/cm3
4, Composition: W content: 85-99%, W-Ni-Fe, W-Ni-Cu
5, Surface: Sintering surface, Forged surface, Ground surface
Tungsten alloy plates are produced by good processing property billets and special cold and hot rolling technology; they can be used to make tungsten target, tungsten heat elements, tungsten radiation shields and tungsten boats for electronics, lightening, electro-vacuum industries.
Tungsten alloy plates play very important role in manufacturing of collimator for nuclear medicine, nuclear research, geologging and homeland security. These materials provide reliable protection against X-rays and gamma radiation.
The thickness of the tungsten alloy plate is as follows:
Foil - a thickness of less than 0.005 in. (0.13 mm).
Plate - thickness greater than or equal to 0.188 inches (4.75 mm).
Sheet - thickness less than or equal to 0.187 inches (4.75 mm) to greater than or equal to 0.005 inches (0.13 mm)
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January 19, 2018
Analysis of the characteristics and principles of thermal spraying
Thermal spraying is to point to a series of process, fine and dispersed metal or nonmetal coating material, in a molten or semi-molten state, deposit to a after the preparation of the substrate surface, forming a spray deposit. It USES a heat source (such as arc, plasma spraying and combustion flame, etc.) will be powder or filiform metal or nonmetal material heated to melt or half molten state, and then with the help of a flame itself or compressed air injection at a certain speed to the pretreatment of substrate surface, deposit formed by surface coating of a kind of technology with a variety of functions.
Characteristics of thermal spraying technology:
1. The matrix material is not restricted, can be metal and non-metal, can be sprayed on various matrix materials;
2. The coating materials can be sprayed widely, and thermal spraying technology can be used to spray almost all solid engineering materials, such as hard alloy, ceramic, metal, graphite, etc.
3. In the process of thermal spraying, the substrate material temperature rise is small, without stress and deformation;
4. Thermal spraying operation is flexible and easy to operate.
5. Thermal spray coating thickness can range from 0.01 to a few millimeters;
6. The thermal spraying coating has various properties, which can form a coating with various special functions such as abrasion resistance, corrosion resistance, heat insulation, oxidation resistance, insulation, conduction and radiation protection.
7. Thermal spraying adaptability and economic benefits are good.
Principle of thermal spraying, thermal spraying refers to a series of process, in the process, subtle and dispersed metal or nonmetal coating material, in a molten or semi-molten state, deposit to a after the preparation of the substrate surface, forming a spray deposit. The coating material can be powder, ribbon, filaments or stick. Thermal spray gun is provided by fuel gas, or electric arc plasma arc necessary quantity of heat, heat the thermal spraying material in plastic state or molten, again through the acceleration of compressed air, make a constrained particle beam impact to the substrate surface. The particles that impact on the surface are deformed by stamping, forming laminated sheets that adhere to the prepared substrate surface, cooling and piling up, eventually forming a layered coating. The coating can achieve high temperature corrosion resistance, wear resistance, heat insulation and electromagnetic wave.
Thermal spraying material: spraying powder occupies a very important position in the whole hot spray material. Thermal spraying alloy powder includes nickel base, iron base and cobalt alloy powder, and is applied to repair and protection of mechanical parts according to different coating hardness.
Thermal Spray Application
That under the action of high-speed airflow of atomized into fine droplet particles or high temperature, at high speed jet to the treated surface, form a solid layer, so that the workpiece surface with different hardness, wear resistance, corrosion resistance, heat resistance, oxidation resistance, heat insulation, insulation, conductive, seal, disinfection, microwave radiation, and other various special physical and chemical properties. It can repair the old and waste in the maintenance of the equipment, and make the scrapped parts come back to life; It can also be strengthened and pre-protected in new product manufacturing to make it "live longer."
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January 18, 2018
Tungsten carbide round rods
Carbide rods, also known as tungsten carbide bar, It is a kind of tungsten carbide (WC) as the main raw material, combined with other precious metals and paste phase by suppressed by adopting the method of powder metallurgy sintering of high hardness, high strength alloy material, widely used in national production and processing fields, such as tungsten steel drill bits.
Carbide rod, as a new technology and new material. Its main features are stable mechanical properties, easy to weld, high wear resistance and high impact resistance. It is mainly used in the manufacture of metal cutting tools, wood, hardness and abrasion resistant products.
Tungsten carbide round rods blank process.
Pulverizing to formula according to the requirements of USES, the wet and dry mix - crushing - and sieving to join after forming agent, then to sieve made the mixture, drying granulating to suppress - molding - low pressure sintering, molding (blank) and external circular grinding fine grinding (blank without this procedure) to detect size, packing and warehousing.
Properties of carbide round rod material properties.
1. High quality ultrafine tungsten carbide and imported cobalt powder are used as raw materials.
2. Adopt the world advanced low-pressure sintering technology for standardized production.
3. High strength and high hardness.
4, has the extremely good red hardness, good abrasion resistance, high elastic modulus, high bending strength, good chemical stability, acid, alkali, high temperature oxidation), corrosion resistance, good impact toughness, low expansion coefficient of thermal conductivity, conductive characteristics of similar to iron and its alloy.
5. Advanced and advanced equipment: Germany imported 10MPa low pressure sintering furnace sintering.
6. Unique new process: vacuum high pressure sintering. In the final stage, the product adopts pressure sintering, which greatly reduces porosity, improves compactness and greatly improves mechanical properties of products.
7. Product features: there are many materials, which can be used for different purposes; Complete specifications, the blank size precision (reduce the processing quantity, improve the production efficiency).
8. Quick service: quick delivery, quick delivery and prompt delivery.
Tungsten carbide round rod application
Carbide rods application scope is widespread, applicable to the production of tungsten steel drill bits, the tiny bit of PCB industry, electrode rods of photoelectric communication industry, machinery processing industry carbide drill, drill shank, top, push rod, wear-resisting precision parts, CNC milling cutter and the whole belt hole machining tool choice high quality material, etc.
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January 16, 2018
Tungsten carbide sandblasting nozzle
Generally, the materials including steel, cast iron, Tungsten carbide sandblasting nozzle are produced. At present, most factories use steel spray nozzles, and a few are made of ceramic sand jet nozzles, but these two shotcrete nozzles have short service life and are not ideal. Under the action of high speed sand, the inner hole gradually wears out or becomes a flared mouth, which can not be used continuously. Hard alloy sandblast nozzle, also known as tungsten steel shotcrete. Hard alloy sandblasting nozzles with high hardness, high strength, corrosion resistance, high temperature resistant and low expansion coefficient, and a series of excellent features, at the same time, the wear-resisting performance is good, service life is long, compared with the steel sand blasting nozzle, 20 ~ 25 times can be improved.
Sand blasting is the motive force of compressed air or abrasive pump, which can be sprayed on the surface of parts by spraying gun to achieve the purpose of cleaning and finishing. Currently, sandblasting technology is widely used in machinery, petroleum, chemical industry, automobile, ship, aerospace, metallurgy, glass, coal and other industries. Sand blasting nozzle is the main wear resistant components in the sandblasting equipment, with a variety of dry or wet sand blasting machine, surface strengthening, surface cleaning, surface coating, surface modification and jet cutting one of the key components of machinery and equipment. Hard alloy sandblasting nozzles with high strength and toughness, good thermal conductivity, the hardness of cemented carbide is higher than the metal material, hard alloy sandblasting nozzle erosion rate is smaller than metal material, the erosion resistance higher than metal sand blasting nozzle, is the ideal choice of the blasting nozzle material.
The failure mode of the hard alloy sandblast nozzle.
Erosion wear is main failure form of tungsten carbide sandblasting nozzle, it refers to a solid surface with liquid containing solid particles, the contact of relative movement, the loss of the surface material, with solid particles of fluid can be high speed air flow, also can be fluid flow, the former produce spray sand erosion, the latter is called type slurry erosion. Hard alloy sandblasting nozzles wear belongs to the low Angle of erosion (15 or less) of erosion wear. The effect of erosion and wear behavior of many factors such as environment parameters (such as the Angle of attack, the erosion speed, the erosion of time and temperature, etc.), abrasive performance (such as hardness, particle size and shape, etc.), the performance of target (such as hardness, fracture toughness and microstructure structure, etc.
Structure classification of tungsten carbide sandblast nozzle.
1. Straight hole tungsten carbide sandblasting nozzle. Its internal structure is only the contraction section and the straight section, the structure is simple, easy to make. This type of nozzle cannot overcome the eddy current phenomenon in the inlet side, the pressure loss is large, and the abrasive outlet speed is less than 100m/s under the pressure condition of 0.7mpa. Generally used in small sandblasting equipment.
2. Venturi carbide sandblast nozzle. The structure of venturi nozzle is divided into three parts: contraction section, flat section and diffusion section. The working efficiency is 15% to 40% higher than the straight hole nozzle, and the abrasive consumption is reduced by 20%.
3. Double vented carbide sandblast nozzle. It is composed of two nozzles before and after, and the area of sandblasted area is 35% larger than that of the standard wenner nozzle, and the outlet speed of sandblasting medium is reduced. This nozzle is usually used for surface treatment of large areas of moderate strength.
4. Angle hard alloy sandblasting nozzle. Make the movement direction of the abrasive flow changes, can be used to clean the Bridges, towers and other steel structure truss, the pipe inner surface, makes it hard for the cleaning of parts can be directly hit by abrasive, achieve the purpose of cleaning.
Application of tungsten carbide sandblast nozzle.
Tungsten carbide shotcrete nozzles are mainly used for oil drilling, aircraft, ship, automobile, bridge, construction engineering, railway and other fields of coating engineering and surface treatment. Sand blasting can be divided into dry sandblasting and wet sand blasting. Its sand grains are quartz sand, carborundum and river sand, among which quartz sand application is the most common. Hard alloy sandblasting nozzles are cleaning, decontamination products, mainly used in ships, Bridges, water conservancy, machinery, chemical industry, container, pipe and other large equipment and parts surface sand blasting, rust removal, decontamination treatment. The hard alloy sandblast nozzle has the characteristics of high strength, high hardness and high wear resistance. The hardness (HRA) of hard alloy sandblasting nozzle (HRA) is 89-93, with a density of 14.4-15g/cm3, and the bending strength is not less than 1500Mpa. Hard alloy is the most widely used nozzle material. Its wearability is obviously better than alumina ceramics, and it can be used for hundreds of hours and is widely used in various structure sandblasting nozzles.
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January 12, 2018
Tungsten Carbide Geological Mining Tools
Tungsten carbide geological mining tools are made of WC-Co alloy. According different geological mining tools, different rock hardness, or in different parts of the geological mining tools, requiring an average WC grain and containing cobalt are also different . Tungsten carbide geological mining tools material in addition to the requirements of high purity, and require WC, C particles are generally coarse, for WC total carbon and free carbon, there are strict requirements range. tungsten carbide geological mining tools has formed a relatively stable and mature production technology, widely used as a molding agent paraffin wax, vacuum dewaxing (and hydrogen dewaxing) and vacuum sintering.
Tungsten carbide geological mining tools take on the important task of engineering geology, oil exploration, mining and civil construction. Tungsten carbide geological mining tools as traditional geological mining tools, geological mining tools by the complex role of impact and abrasion, harsh working conditions, there are at least wear mine rock form more than four, namely: thermal fatigue wear, shock wear the shock of fatigue wear and abrasive wear. tungsten carbide geological mining tools compared with the general geological mining tools, have higher hardness, strength and toughness. tungsten carbide able to adapt to changing conditions better,and under the guarantee toughness does not fall have further improve the wear resistance of the alloy.
tungsten carbide bits as the common part of tungsten carbide geological mining tools, one tungsten carbide bit can replace 4 to 10 steel bits, its penetration rate twice as high, while the tungsten carbide drill bit replacement less often, improve production efficiency, perforation rate. Tooth tungsten carbide drill for, it is required to adapt to a variety of rock properties teeth, perforation rate, abrasion resistance, shock resistance, so as to achieve long service life. Tungsten carbide drill bit has become a major tool for high-efficiency perforated. Currently tungsten carbide geological mining tools for large and medium-sized open-air metal mines, especially for large open pit type non-ferrous metal perforation, tungsten carbide geological mining tools has broad prospects.
Selection of tungsten carbide geological mining tools
Tungsten carbide geological mining tools have high hardness and excellent wear resistance and heat resistance of some, but it is a very sensitive to surface cracks or defects, poor performance of the anti-shock cold quasi-brittle materials; its compressive strength is high, but the tensile strength is very low. Meanwhile, the stress concentration is also very sensitive. Selection of geological mining tools with tungsten carbide grade, should be the main consideration alloy shock resistance and abrasion resistance. Various items of property flexural strength, hardness, density, coercive force, fracture toughness, porosity, dirt degrees, the average grain size of tungsten tungsten carbide , etc., can reflect different aspects of shock resistance and wear resistance of the alloy.
Selection tungsten carbide geological mining tools, the shock of extremely hard rock and heavy drills big power should focus on the toughness of the tungsten carbide alloy, the choice of a higher amount of cobalt-containing tungsten carbide alloy grades; for hard and brittle, and the corrosive rock, should focused on the wear resistance of the tungsten carbide alloy, the choice of a slightly lower amount of cobalt tungsten carbide alloy grades; on the hard and medium hard rock below, should use low cobalt-containing, high hardness tungsten carbide alloy grades; for use under heavy mining coal mining tungsten carbide cutter used mainly to reduce the cobalt content increased, grain size so that the shock toughness of the alloy greatly improved flexural strength; for column teeth, cross, three-blade drill head is the choice of the cobalt-containing lower amounts of tungsten carbide .
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January 11, 2018
Application environment and application scope of tungsten carbide bushing
tungsten carbide bushing with tungsten carbide powder as main raw material, at the same time with cobalt powder as binder and then mixing injection mould pressing sintered and eventually into corresponding, therefore tungsten carbide bushing with the tungsten carbide material of high hardness and high bending strength, wear resistance and corrosion resistance and its also spoke highly of by the user, widely used in various industrial fields.
In order to cater for the use of customers in different fields, tungsten carbide bushing can be made of different carbides. According to different binder, the tungsten carbide plate number is mainly divided into YG series and YN series. Generally speaking, the YG series cemented carbide bushing has higher flexural strength, while YN series cemented carbide bushing has better corrosion resistance than the former.
According to the different application ranges, we manufacture of cemented carbide liner usually has a high precision size, is also due to their high precision grinding degree, size precision, high wear resistance and corrosion resistance, tungsten carbide bushing is widely by many domestic and foreign customers praise.
In addition, due to the different use environment of cemented carbide bushing, there are several types: tungsten carbide bushing, tungsten carbide guide sleeve and tungsten carbide drill sleeve, etc. According to the customer's design drawing, we can customize the tungsten carbide liner to meet the user's different usage environment.
tungsten carbide bushing in terms of stretching, mainly some stretching, copper, stainless steel parts by using frequency is too high,it’s easy to heat, wear bushing, thus make blunt needle movement, product size error, and the bad appearance of the products.
With the improvement of oil production, the superficial surface oil reduce, in order to ensure that oil consumption of people gradually to the deep well, high Angle Wells, but gradually increased the difficulty of the drilling for oil and therefore the exploitation of oil components requirements with good wear resistance, corrosion resistance and impact resistance, etc.
tungsten carbide bushing as wear parts in the mechanical oil Wells, with high hardness, good wear resistance, smooth finish higher performance, already more and more widely applied in modern society, satisfied the need of daily and special performance. Some enterprises adopt spray welding technology to improve the durability and service life of cemented carbide bushing.
After spray welding of cemented carbide liner to HRC60 hardness, wear resistance is better, can meet the application requirements of petroleum machinery industry, but the tungsten carbide bushing need to spray after welding turning processing, in order to guarantee the size of the drawings and accuracy requirements.
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January 04, 2018
Tungsten alloy bars are widely used and popular
Tungsten alloys can be made in various shapes, but the most commonly used shape is a round bar, which can be treated with thermal machinery to improve its mechanical properties. The tungsten alloy rotary forging stick is made of tungsten alloy rodsthrough forging, thus greatly increasing its tensile strength, and its strength is at least 1050 MB to 1200 MB. Tungsten alloy spinning rod is formed by extrusion and sintered tungsten carbide powder. Sizes range from 3mm to 50mm.
The tungsten alloy bars are mainly made from square and round tungsten alloys. The hollow tungsten alloy bar is one of the important types of tungsten alloy bars. Tungsten alloy rod machining process, tungsten alloy rod is hollowed out by a single point cutting tool, in order to realize a bigger hole, such as boring and artillery barrel diameter precision of hole or holes, it can also be used to cut a tapered hole.
Tungsten alloy bars can be divided into several types. At both ends of the tungsten carbide, this is just working. If the existing hole is a pass hole, it can be supported at one end and can be supported. The hollowed-out tungsten alloy bars are made through existing holes, then in the "back" work, while hollowing out the process. The tungsten bar is formed by pressing the burning and then rolling. Smaller dimensions are made from subsequent drawings. The rod has various direct lengths, the diameter of the surface forgings is generally 3 mm or more, and the finished product is generally below 3 mm. A non-central product can also be provided. It can also provide specific length and special components according to the requirements.
Tungsten alloy bars are widely used and popular
These kinds of rods can be further processed, usually used to make the balance weight, radiation shielding, military defense equipment, welding rod, extrusion die, also used in some sport, such as darts, steel billet, golf clubs, etc. in addition, we can produce and provide tungsten rods as Anviloy 1150 counterparts, nature is very similar between them. Due to its high density, high melting point, small capacity, good hardness, excellent wear resistance, high tensile strength, tungsten alloy bars are more and more popular.
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