Tungsten Carbide Coated Tool Multilayer Coating Structure

With the advancement of technology, machining technology advances, single-layer coating has been unable to meet the job requirements of tungsten carbide coated tools. The method of forming a multi-layer structure can take advantage of a single-layer coating in excellent mechanical properties of the original advantage of the conditions to further improve its hardness, toughness and high temperature oxidation resistance, is to improve Carbide Coated Cutting Tools important technical measures. Single Al2O3 coating has many fine performance, but the combination of strength Al2O3 single poor coating and the substrate, on the substrate by depositing a layer of TiCN or (Ti, Al) N (e.g. TiCN / Al2O3, TiAlN / Al2O3) can significantly improve the bonding strength of Al2O3 coating and tool performance is greatly improved.