PROBLEM TO BE SOLVED: To provide a surface coated cemented carbide cutting tool wherein superior adhesion is provided for an artificial diamond coated layer. ;SOLUTION: In a surface coated cemented carbide cutting tool constructed in such a manner that a base body contains 1 to 10 wt.% of Co as a binder phase forming component, a remaining part is made of a tungsten carbide base cemented carbide having the internal composition of tungsten carbide and inevitable impurities as dispersed phase forming components, and after surface grinding, an artificial diamond coated layer or an artificial diamond like carbon coated layer having an average layer thickness of 5 to 200 μm is formed on the surface of the base body subjected to tungsten carbonate particle coarse heat treatment and Co eliminating treatment, irregular surfaces are formed by electrolytic etching in the crystal surface (001) of the coarse carbonate tungsten particle decarburized surface exposed on the base body surface before the formation of the artificial diamond coated layer or the artificial diamond carbonate coated layer and a ridge line surface intersecting the crystal surface (001).;COPYRIGHT: (C)1999,JPO
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