With the rapid development of science and technology and modern industry, new requirements have been put forward for mechanical cutting tools, namely high efficiency, high life and high precision. Ceramic knives can meet the above-mentioned "three high" requirements. First, the characteristics of ceramic tools 1. Low friction coefficient, good chemical stability Because of the low friction coefficient of ceramic tool materials, it can be freely cut, and it is not easy to produce cutting tumors. Its affinity with metal is small, and