| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface coated cutting tool having a hard coated layer showing excellent chipping resistance and wear resistance in high-speed heavy cutting machining of heat-resistant alloy. SOLUTION: The surface coated cutting tool has an average layer thickness of 1 to 8μm on a surface of a tool base body made from tungsten carbide base cemented carbide or titanium carbonitride base cermet, and is coated with a composition changing (Al, Cr, V, B) N layer wherein the Al-V maximum containing points and the B maximum containing points alternately and repetitively exist at predetermined intervals. The content of Al, Cr, V, and B at the Al-V maximum containing point is respectively 0.40-0.60, 0.30-0.50, 0.05-0.10, and 0.01-0.10. The content of Al, Cr, V, and B at the B maximum containing point is respectively 0.05-0.19, 0.25-0.45, 0.01-0.08, and 0.40-0.55. COPYRIGHT: (C)2008,JPO&INPIT
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