Ceramic CNC machining tools have the characteristics of high hardness, good wear resistance, excellent heat resistance and chemical stability, and are not easy to bond with metals. Ceramic tools occupy a very important position in CNC machining, which have become one of the main tools for high-speed cutting and difficult-to-machine materials processing. Ceramic tools are widely used in high-speed cutting, dry cutting, hard cutting and cutting of difficult-to-machine materials, and they can efficiently process high-hard materials that cannot be processed by traditional tools, realizing "turning instead of grinding"; the optimal cutting speed of ceramic tools can be 2 to 10 times higher than that of cemented carbide tools, which greatly improves the cutting process production efficiency: The main raw materials used in ceramic tool materials are the most abundant elements in the earth's crust. Therefore, the promotion and application of ceramic CNC machining tools is of great significance to increase productivity, reduce processing costs, and save strategic precious metals and promote the advancement of cutting technology.
Ceramic tool materials for ceramic CNC machining can generally be divided into three categories: alumina-based ceramics, silicon nitride-based ceramics, and composite silicon nitride-alumina-based ceramics. Among them, alumina-based and silicon nitride-based ceramic tool material is the most widely used one. The performance of silicon nitride-based ceramics is superior to that of alumina-based ceramics.
①High hardness and good wear resistance.
②High temperature and heat resistance.
③Good chemical stability.
④Low friction coefficient.
Ceramics is one of the tool materials mainly used for high-speed finishing and semi-finishing. Ceramic tools are suitable for cutting various cast irons (gray cast iron, ductile iron, malleable cast iron, chilled cast iron, high-alloy wear-resistant cast iron) and steel (carbon structural steel, alloy structural steel, high-strength steel, high-manganese steel, quenched steel etc.), and they can also be used to cut copper alloys, graphite, engineering plastics and composite materials.