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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