The diamond, as a kind of superhard cutting tool used to cut materials, for hundreds of years. In the context of tool development, from the late nineteenth century to the middle of the twentieth, a material with high speed steel as the main representative of Germany in 1927, and placed first in cemented carbide tool materials, widely used in fifties, Sweden and the United States respectively to produce artificial diamond cutting tool, and then enter with the ultra hard material as draw Mimi small. In seventies, people use high-pressure synthesis techniques in the structure of polycrystalline diamond (PCD), natural diamond and solves the problem of scarcity and high prices. The application of diamond tools includes many areas of aviation, aerospace, automotive, electronics, etc.
The wear form of cutting tools is mainly grinding (abrasive wear, adhesive wear and cold welding and wear, thermal oxidation, and wear failure modes etc. PCD incisors was different from other traditional means, primarily polycrystalline layer wear damage of diffusion wear ties. The results showed that the failure modes PCD based metal matrix composites mainly the adhesive wear small intergranular cracks caused by defects of diamond grains. In the processing of high hardness The second part, high brittle adhesive materials PCD tool wear is not clear, on the contrary, in the decline of brittle materials processing (such as carbon fiber reinforced material. Tool wear and wear a leash and played a leading role.