关键词: Si3N4, Ti(CN), 切削加工, 陶瓷刀具

Abstract: The hardness and cutting performance of Si3N4-based and Ti(CN) based ceramic tools are enhanced by dispersion of hard particles.Compared with the cemented carbide tool，their cutting life is about 5～15 times longer，the optimum cutting speed is 3～10 times faster.They can not only do rough and finish machining of various superhard materials，but also do some machining with great shock load，such as milling，planning，interrupted cutting. A series cutting jobs，which are extremely difficult，are achieved by using the new composite ceramic tools. Application and popularization of the new ceramic cutting tools and cutting technique will reform the metal machining process，and will save a large amount of energy and valuable metal，and will bring economic benefit for society.

Key words: Ceramic tool, Cutting, Si3N4, Ti(CN)