Types Analysis on Cutting Tool Materials in the Process of Cutting

Currently, in the process of cutting, the common tool materials include high speed steel, cemented carbide, ceramics and superhard cutting tool materials, and superhard cutting tool materials include synthetic diamond (PCD), cubic boron nitride (CBN), etc.

Synthetic diamond

Polycrystalline diamond (PCD), made by mixing metal bond and diamond micro powder, sintering under high temperature and high pressure, has high hardness, good thermal conductivity, low thermal expansion coefficient, high elastic modulus and low coefficient of friction, whose blade is very sharp. Due to the effect of affinity between carbon andiron. Especially under high temperature, diamond can react with iron, so diamond tool is unfavorable in cutting iron and its alloy workpiece.

It is the ideal tool material for high speed cutting aluminum alloy, whose cutting speed can reach 2500-5000 m/min. To view more information about synthetic diamond, please visit the following companies: Boshi Superhard Material Co.,Ltd., Xinren Superabrasives Co,.limited. and Jinxin Abrasives Co.,ltd. They are professional synthetic diamond manufacturers and their products are popular with buyers from all over the world.

Cubic boron nitride

Cubic boron nitride (CBN) was made in the late 1950 s with similar methods of synthetic diamond. Because the sintering performance of CBN is poor, polycrystalline cubic boron nitride PCBN was made in the 70s. CBN is the dense phase of boron nitride, has high hardness (second only to diamond) and heat resistance (1300 ℃, 1500 ℃), whose cutting speed is 4 to 6 times the size of carbide cutting tools. It has excellent chemical stability (far better than diamond) thermal conductivity, and low coefficient of friction. The affinity of PCBN and Fe is very low, so it is ideal tool material for high speed cutting black metal.