Carbide indexable insert are now coated with titanium carbide by chemical vapor deposition method, titanium nitride, alumina, hard layer or a composite hard layer. Development of physical vapor deposition can be used not only carbide cutting wheel, high speed wheelcutting tools, such as drills, hobs, taps and milling cutters can also be used. Hard coating as a barrier to impede the chemical diffusion and thermal conduction, so that the slow down the wear rate of the tool during the cutting, the lifetime of the coated blade with and without the coating compared to improved by about 1 to 3 times or more.
Due to the high-temperature, high-pressure, high-speed work, and the corrosive fluid medium parts, its application more and more difficult to machine materials, increasing the level of automation of the cutting and machining accuracy. To accommodate this situation, the direction of development of the tool will be the development and application of a new cutting Toolmaterial; vapor deposition coating technology, further development of the tool in a higher hardness of the coating is deposited on a substrate of high toughness and high strength, to better address contradiction between the hardness and strength of the tool material; further development of indexable cutting tools structure; improve the the Honing stone manufacturing accuracy and reduce the differences in product quality, make use of the tool to achieve optimization.