PCD Diamond Blanks for Wire Drawing Dies manufacturer

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Polycrystalline diamond tools have become an indispensable tool in modern machining. This is mainly reflected in the following aspects:

 (1) High-speed cutting, high-stability processing

(2) Ultra-precision mirror processing

(3) Dry cutting and cleaning processing

Performance introduction

The characteristics of Polycrystalline diamond tools(1) High hardness and wear resistance

Polycrystalline diamond has a hardness of up to 10000 HV. It is the hardest material in the world. It is much harder than hard alloys and engineering ceramics. Because of its extremely high hardness and isotropic properties, polycrystalline diamond has extreme Good wear resistance.

 (2) Low friction coefficient

The coefficient of friction between polycrystalline diamond and some non-ferrous metals is lower than that of other materials, which is about 1/2 of that of cemented carbide. The low coefficient of friction not only reduces the deformation and cutting force, but also causes no built-up edge during cutting, thus reducing the surface roughness of the machined surface.

 (3) High thermal conductivity

Polycrystalline diamond has a high thermal conductivity, which is better than silver and copper. It is much higher than that of ordinary hard alloys. Therefore, the cutting heat is easily dissipated during the cutting process, so the cutting temperature is low.

(4) High processing accuracy

Because the polycrystalline diamond tool has a low coefficient of thermal expansion and a high modulus of elasticity, the tool is not easily deformed during the cutting process. Under the action of the cutting force, the tool can maintain its original parameters, maintain sharpness for a long time, and has high cutting precision. Therefore, when machining with a PCD tool, the cutting force can be reduced and the cutting temperature can be lowered, the tool durability and the cutting rate can be improved, and a good machined surface can be obtained.

The main problem: the high hardness and high wear resistance of PCD materials make molding and surface finishing very difficult, which seriously hinders its popularization and application.

Common processing methods: EDM, laser processing, chemical processing, ultrasonic processing.

 Ideal processing method: grinding or grinding.

Features compared with tungsten carbide tools:

1, The hardness of PCD is 80 to 120 times that of tungsten carbide.
2. The thermal conductivity of PCD is 1.5 to 9 times that of tungsten carbide.Its thermal conductivity is  700W/mk. The PCD blank can conduct heat fast
3,  PCD toolings life can exceed carbide cutting tool life 50 to 100 times.

Features compared with natural diamond tools:
1, PCD is more resistant over natural diamond because of its random orientation structure of the diamond particles, and is backed by a carbide substrate. 
2, PCD is more constant in wear due to complete production system for quality consistant control, Natural diamond is a single crystal in nature and has soft and hard grains both,when making into toolings, it will not be well using with soft grains.
3, PCD is cheaper and with various shapes and sizes to choose from for toolings, natural diamond is the limit on these point.