| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface-coated cutting tool provided with a hard coated layer achieving excellent wear resistance in high speed cutting. SOLUTION: This surface-coated cutting tool is constituted by covering a surface of a tool basic body made of tungsten carbide group cemented carbide or titanium carbide nitride group cermet with N layers having average thickness of layers of 1-5μm and having varying composition (Al, Cr, Si, W, C) in which the maximum amount of Al-Cr-Si containing points and the maximum amount of W-C containing points are alternately and repeatedly existent at a predetermined interval along the direction of thickness of layers. The percentages of contents of Al, Cr, Si, W, and C at the maximum amount of Al-Cr-Si containing point are 0.3-0.5, 0.2-0.35, 0.1-0.2, 0.05-0.25, and 0.05-0.15, respectively, and the percentages of content of Al, Cr, Si, W, and C at the maximum amount of W-C containing point are 0.1-0.25, 0.05-0.15, 0.01-0.05, 0.35-0.45, and 0.25-0.35, respectively. COPYRIGHT: (C)2008,JPO&INPIT
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