| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface coated cemented carbide cutting tool having a hard coating layer exerting excellent wear resistance in high-speed cutting. SOLUTION: This surface coated cemented carbide cutting tool is made by physically depositing the hard coating layer made of (b) a composite nitride layer of Cr and V which has average layer thickness of 0.5 to 7μm, satisfies a composition formula: (Cr1- YVY)N (Y shows 0.4 to 0.7 in an atomic ratio), shows a maximum peak on (200) plane by a measurement by an X-ray diffractometer using Cu-Kαrays and shows an X-ray diffraction pattern having the half-width of 2θand <=0.9 degrees of the maximum peak, on the surface of a tungsten carbide group cemented carbide base body or a titanium carbonitride group cermet base body, via a crystal orientation history layer made of (a) a Ti-V composite nitride layer which has average layer thickness of 0.05 to 0.5μm, satisfies a composition formula: (Ti1- XVX)N (X shows 0.05 to 0.20 in the atomic ratio), shows a maximum peak on (200) plane by a measurement by the X-ray diffractometer using Cu-Kαrays and shows an X-ray diffraction pattern having the half-width of 2θand <=0.9 degrees of the maximum peak.
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