When dry cutting tools to withstand higher temperatures than wet cutting, tool and chip and the friction coefficient of the contact surface of the tool and the workpiece should be as small as possible, but also requires the breaker and the tool can be beneficial to chip, which requires together to solve in terms of tool materials, coatings and tool geometry and architecture.
Fine grain carbide cutting in particular, can withstand higher temperatures tic (n) based alloy (also known as cermet), it can be used for dry cutting. However, the cermet poor impact resistance, it is used for finishing and semi-finishing, US kennametal company tiain coated cermet blade ht7, is to dry milling steel and high alloy developed. Hefei University of use by the tin-modified nano-powder metal ceramic blade dry cutting test, the better.
pcd (polycrystalline diamond) and cvd diamond coated blade has high hardness and thermal conductivity, for high-speed dry cutting all kinds of non-ferrous metals and non-metallic material wear performance, but not the processing of ferrous metals. pcbn (polycrystalline cubic boron nitride) hardness and wear resistance second only to diamond, there are excellent red hardness, chemical stability and low coefficient of friction, high-speed dry cutting hrc50 than hardened steel and chilled cast iron and other ferrous metals The ideal tool material.