Tungsten Carbide Coated Tool Flexibility of The Coating Process

Single tungsten coated carbide coated tools can not meet the increasingly complex machining requirements, therefore, it appears coating technology portfolio diversification. "Nitriding / PVD" composite coating technology is one of them. As early as 1983 it was suggested that the plasma nitriding and ion plating process together. To improve the performance of the hard protective coating substrates by thermal chemical pretreatment technology more and more attention. The matrix nitriding and ion plating TiN composite processing, it can form a reasonable hardness gradient distribution, and also because of the role of TiN and N and further spread to internal nitrided layer deposition process, so that the transition layer hardness than a single nitrided layer is higher around 100HV0.1, so that the composite coatings have been strengthened.