SURFACE COATED CUTTING TOOL HAVING SUPERIOR HEAT RESISTANCE AND WEAR RESISTANCE

PROBLEM TO BE SOLVED: To provide a surface coated cutting tool whose hard coating layer exhibits superior heat resistance and wear resistance in high-speed cutting of general steel, high-hardness steel, etc.SOLUTION: There is provided the surface coated cutting tool having the hard coating layer formed on the surface of a tool base body made of tungsten carbide-based cemented carbide or titanium carbide-based cermet, the hard coating layer is formed of a composite nitride layer which has an average layer thickness of 0.5-5 μm and is made of Al, Cr and Re satisfying a composition formula of (AlCrRe)N (where α represents the content ratio of Cr and satisfies 0.25≤α≤0.55 in terms of atomic ratio, and represents the content ratio of Re and satisfies 0.001≤ ≤0.10 in terms of atomic ratio).