The development of the cutting tool materials includes five stages of tool steel, high-speed steel, cermet, ceramic and super-hard material.

• 刀具材料的发展经历了工具钢、高速钢、金属陶瓷、陶瓷和超硬材料五个阶段,精密加工脆性和高硬度的材料促进了刀具材料的不断发展。