Advanced processing equipment and high-performance CNC tool cooperate in order to give full play to its proper performance, and achieved good economic benefits. With the rapid development of tool materials, a variety of new cutting tool material, its physical and mechanical properties and cutting performance has been greatly improved, the application scope has been expanded. Tool material should have the basic performance      Greatly influence the choice of tool life tool materials, processing efficiency, processing quality and processing costs and the like. To withstand high pressure, high temperature, friction, shock and vibration effects when the cutting tool. Thus, the tool material should have the following basic properties:      (1) the hardness and wear resistance. Hardness of the tool material must be higher than the hardness of the workpiece material, generally require more than 60HRC. The higher the hardness of the tool material, the better the wear resistance.      (2) the strength and toughness. Tool material should have high strength and toughness to withstand the cutting forces, shock and vibration, to prevent brittle fracture and chipping tool.      (3) heat resistance. Tool material better heat resistance, can withstand high cutting temperatures, have good antioxidant capacity.      (4) process performance and economy. Tool material should have good performance forging, heat treatment properties, weldability; grinding performance, but also to the pursuit of high performance and low cost.