| 摘要 |
PROBLEM TO BE SOLVED: To provide a hard coating covering tool capable of dealing with dry cutting work and a high speed thereof by increasing oxidation resistance without sacrificing the wear resistance and the adhesion of a TiAlN coating. SOLUTION: Any one of high-speed steel, cemented carbide, cermet and ceramic is used as a base material, one or more (a) layers and one or more (b) layers are alternately formed, the (a) layer being made of any one of nitride, carbon nitride, oxide nitride and oxide and carbon nitride containing one, and remaining Ti, two kinds or more of Si, Cr and Nb, >=10% and <=60% with atom % of only metal component, and having a layer thickness of 0.1μm to 3μm and the (b) layer being made of any one of nitride, carbon nitride, oxide nitride, and oxide and carbon nitride, and remaining Ti, Al: >40% and <=75% with atom % of only metal component, and the (b) layers are located directly above the base material.
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