Summary of knowledge of high-speed cutting CNC tool materials

Cermet has high room temperature hardness, high temperature hardness and good wear resistance, strong oxidation resistance and good chemical stability. The materials of cermet tools mainly include TiC-based cemented carbide (TiC+Ni or Mo) with high wear resistance, high-toughness TiC-based cemented carbide (TiC+TaC+WC), tough TiN-based cemented carbide and High strength and toughness TiCN-based cemented carbide (TiCN + NbC), etc. The tools made of these alloys can process steel and alloy steel at high speed in the range of υc=300m/min～500m/min, and finish machining cast iron. Cermets can be made into drills, milling cutters and hobs. For example, the cermet hob developed by Japan, υc=600m/min, is about 10-20 times that of the cemented carbide hob, and the machined surface roughness value Rmax is 2μm.