| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface coated cutting tool with a hard coating layer exhibiting excellent chipping resistance. SOLUTION: This surface coated cutting tool is formed by vapor-depositing a hard coating layer composed of a ground layer and an upper layer on the surface of a tool substrate, the ground layer comprises a mixed-phase structure layer with a layer thickness of 0.1-2μm which is formed by dispersing and distributing a 10-40 area% of a CrTi composite carbide phase of a rhombic crystal in a TiCr composite carbide phase matrix of a cubic crystal, and the upper layer comprises a laminated structure of an inner layer (Ti nitride layer) with a layer thickness of 0.5-2μm, an intermediate layer (Ti carbide layer of granular crystal structure or Ti carbonitride layer of longitudinal growth crystal structure) with a layer thickness of 0.5-5μm and a surface layer (Ti nitride layer) with a layer thickness of 0.3-2μm. COPYRIGHT: (C)2008,JPO&INPIT
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