March 31, 2016

What Are the Guidelines For Welding Cast Iron?

Welding cast iron calls for some special procedure. It is a challenging task and there can be no two opinions about that. Cast iron, unlike most other steels, has much greater carbon content at 2 to 4 percent. This causes most cast iron to be brittle making it difficult to weld. If the following procedure is followed, cast iron can be welded with relative ease:

Use either cooling or heating while welding cast iron as it is important to keep casting iron out of the 150- to 500-degree F range. Preheating is widely preferred, but there are times when cooling are also done. But stick to either cooling or heating and do not attempt to change in the middle of a weld.

Though preheating the cast ironing part should suffice, it is preferable to preheat the entire casting slowly and uniformly in the 500- to 1,200-degree F range. Be very careful to heat within the stated range as overheating may cause iron to crack. The casting should get hot just to the extent you can to touch it comfortably with your bare hand. If need be, make short welds intermittently to avoid overheating.

Occurrences of small cracks when welding cast ironing, is inevitable. You can apply some sealing compound to prevent leakages. If there are major cracks you must repair with studding. Studding is a complex process calling for a lot of skills. The first step is to drill and tap holes on the surface that has beveled. The next step is to put in steel studs and the studs should come out 5 to 6 mm above the surface and the studs should then be welded to remain in place.

Preheated welding can be easily done - particularly for small and manageable objects. While welding the cast iron without preheating, it is extremely essential the operator has good control over the welding gun and make the welds as small as possible.

Welding cast iron with an arc welder calls for different procedure. As a matter of fact, persons capable of welding cast iron with arc welder are few in number and there is a great demand for such skilled persons.

You may have to either purchase or hire a SMAW (shielded metal arc welding or stick electrode) welder depending how often you do cast ironing welding with arc welder. Plug your welder into a 220V outlet and then plug in your ground cord and welder electrode holder cord into the welder. Please know that to weld cast iron, you need a special electrode. You may buy a 770 stick electrode to weld cast iron.

First of all, clean the surface area to be welded with a wire brush. Clamp the grounding clamp cord from the welderonto the piece of cast iron that has to be welded. Thereafter, place an electrode into the welder electrode holder and position the electrode near where the weld has to begin.

Continue to tap the electrode on the cast ironing till an arc is created and begin to weave the electrode stick from side to side. Make it a point to keep the arc slightly away from the piece of steel you are welding. Wait for a few minutes for the weld to cool off gradually. Use the welding hammer to chip off the slag from the top of the weld.

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March 12, 2016

Are you searching for remarkably superior and impressive home drawer doors?

It is a very common phenomenon amid families to locate the right sort of kitchen cabinetry add-ons to brighten their kitchen and making it an ideal place to make food and prepare food. These kinds of incredible cabinetry will help and of course takes on a crucial role in let you use each square inch; while assists in hide most likely messy locations or highlights the special pieces. Individuals research for the ideal types of doorways that could improve your kitchen's design and style and accomplish your desire for the perfect modular kitchen. Depending on the place and the particular case, you can find different kinds of Parts cabinet from which to choose including monitor entrance doors, wallet doorways, flick-up doors, slipping doorways, tambour entrance doors, and the collection continues. You will need to pick the best 1 in accordance with your option and type of region and cabinetry add-ons. These doorways are constructed with superior quality timber to dietary fiber, plastic-type material and lightweight aluminum as well. Shade blend is dependent upon your decision and the kind of interior decoration your residence is equipped with. There is absolutely no denying the truth that such awesome entry doors play an important role in using every single " of your kitchen in the correct way you like. Wallet drawer entrance doors, as an example, will be the appropriate type of entrance doors that direct you towards concealing seriously utilized project or prep locations within your cooking area. Remember to note the small interior wallets which are built in either side in the Small Parts cabinet. This way, once you wide open the doors, they search just like any other case door. But, for you personally close them, they glide directly into on their own. In this manner, they are fantastic for a kitchen area to work with every single ". each and each and every type of doorway has its own relevance and benefit to provide any home a comprehensive and modern-day look. Now, it is possible to choose the right type of doorways which fits well your kitchen area and finances. No matter if you are interested in home case entrance doors or need to have everything else, you will have some far better possibilities of gratifying your necessity. Today, there are numerous recognized companies and corporations providing you a gamut of professional services and solutions that will certainly go nicely your necessity and meet your need to get the best high quality drawer entry doors and doors in every other area of the property. In accordance with your prerequisite you must select the right agency. You can also get the manufacturers straight that are manufacturing and providing the highest quality entry doors that are created from top quality resources collected from the best companies. Remember to mention some additional services and rewards you will get. These services incorporate manufacturer's warranty, straightforward refund policy, money back refund, on-time shipping and parts storage cabinet . So, what you are expecting, go ahead and speak to by way of any handy setting of communication and have the proper providers and alternatives.

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March 09, 2016

How to produce coated tungsten carbide cutting tools?What is coated  tungsten carbide rod tools? China coated tungsten carbide cutting tool, which is coated with a thin layer of refractory metal or non metal compounds. As a chemical barrier coating and thermal barrier, coated carbide cutting tool can reduce the diffusion and chemical reaction between the tool and the workpiece.How to produce coated tungsten carbide cutting tools? There are two kinds of coating methods commonly used in its production. Physical vapor deposition (PVD) method and chemical vapor deposition (CVD) method. For PVD, the deposition temperature was 500 C, the thickness of the coating is 2~5 m; for CVD, the deposition temperature is 900℃~1100℃, coating thickness up to 5~10 m. CVD is always used for producing < carbide dies . In recent years, with the progress of technology of hard alloy coating, PVD can also be used in producing coated carbide cutting tools. In abroad, there is a new method which is called PCVD, it is combine PVD and CVD.Before processing coated tungsten carbide cutting tools, the passivation to cutting edge is needed. So, to produce thin chip which has a tool requirement of sharp cutting edge should use the PVD method to finish machining. Not only coating can be coated on the surface of tips, but also can be applied to the solid carbide cutting tool. It is reported, a foreign company using the PCVD method in welding carbide drill, the result is that, the life of drill steel material is 10 times longer than high-speed steel drill bits, efficiency is increased by 5 times.The coating material is also important to the results of producing coated tungsten carbide cutting tolls. The coating material is always supposed to be with high hardness, good wear resistance and chemical stability, etc. Obviously, it is difficult to meet the requirements for one kind of material. Compared to single TiC, TiN, Al2O3,etc, more and more thick film, composite and multiple coatings come into being. The toughness of the coating, bonding strength and resistance of coatings are all improved by composite materials.Have you got how to produce coated  tungsten porder ? Coated tungsten carbide tools are more and more widely used in industries, if you want to know more about carbide tools, such as carbide cutting tools, carbide dies, please visit www.wococarbide.net.

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March 01, 2016

How many grades of cemented carbide in the world?

Cemented carbides, also known as tungsten carbide or hardmetals, are the most widely used class of materials for high speed machining. It is an incredibly versatile and useful material due to its unique properties. Knowing the basics of tungsten carbide powder the important criteria is to specify two of three factors; binder content, hardness or grain size. These parameters will critically determine the microstructure of the cemented carbide and its properties. Certain combinations of properties are preferred for specific applications, providing a means categorizing multiple grades.How many grades of cemented carbide in the world?

Cemented carbides, also known as tungsten carbide or hardmetals, are the most widely used class of materials for high speed machining. It is an incredibly versatile and useful material due to its unique properties. Knowing the basics cemented carbide, including their characteristics as cutting tool materials, can help parts manufacturers choose the right tool for an application.

It is no surprise that there are hundreds of different possible grades. There are at least 5,000 different grades of tungsten carbide sold under more than 1,500 different trade names by more than 1,500 different companies. why are there so many kinds of grades and how does a toolmaker select the right material for a given application?

The different types of WC powders, the compositon and amount of the metal binder and the type and the amount of grain growth inhibitor are responsible
for the variety of cemented carbide grades. When evaluating or finding equivalents of tungsten carbide powder the important criteria is to specify two of three factors; binder content, hardness or grain size. These parameters will critically determine the microstructure of the cemented carbide and its properties. Certain combinations of properties are preferred for specific applications, providing a means categorizing multiple grades.

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