Cemented Carbide Coating Tool Coating Composition Diversification

With the continuous development of technology, cell coated cemented carbide coated tools can not meet the needs of the market, does not match the substrate and the hardness, elastic modulus and thermal expansion coefficient of the coating material coated tools unit, the lattice type are not the same, resulting in residual stress between the substrate and coating, adhesion is not strong. Adding new elements in a single coating (such as adding Al, Cr and Y increase antioxidant activity, adding Zr, V, B and Hf improve wear resistance, hardness and resistance to adding Si improve chemical diffusion) prepare a diverse tool coating layer material, greatly improving the overall performance of carbide-coated tools. In the multi-carbide coated tool, the most commonly used is the TiCN, (Ti, Al) N coatings.