Coated carbide tools compared with carbide tools, both in strength, hardness and wear resistance are greatly improved. Turning hardness hrc45 ~ 55 artifacts, low-cost high-speed turning carbide coating. In recent years, some manufacturers use other methods to improve the coating materials, the performance of the coated tools has greatly improved. Some manufacturers such as United States and Japan Swiss altin coating materials and coating patented technology to produce coated blade hardness up hv4500 ~ 4900, the hardness of tool steel can be cut at 498.56m / min speed hrc47 ~ 58's. Still hardness is not reduced when turning the temperature up to 1500 ~ 1600 ° c, no oxidation, blade life is 4 times the normal blade coating, and the cost is only 30%, and good adhesion. Ceramic tool material along with its composition and suppress continuous improvement process, in particular the progress of nanotechnology, making it possible toughening of ceramic cutting tools in the near future, following the ceramics may speed steel, carbide cutting caused after 3rd revolution. Ceramic cutting tools with high hardness (hra91 ~ 95), high strength (bending strength is 750 ~ 1000mpa), wear resistance, chemical stability, good anti-adhesion properties, low coefficient of friction and low prices, excellent

Point. Moreover, the ceramic tool also has high-temperature hardness, hardness when hra80 1200 ° c.