| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface-coated cemented carbide cutting tool having a hard coating layer exhibiting superior abrasion resistance under a high speed cutting condition, and its manufacturing method. SOLUTION: This surface-coated cemented carbide cutting tool is formed by physically depositing the hard coating layer composed of a composite oxynitride layer of Al, Ti, and Y (yttrium) in the average layer thickness of 1 to 15μm on a surface of a cemented carbide base body; is constituted so that the hard coating layer has a component concentration distribution structure that a maximum inclusion point of Al and oxygen and a maximum inclusion point of Ti and nitrogen alternately and repeatedly exist at a prescribed interval in the layer thickness direction, and an inclusion rate of Al and oxygen, and Ti and nitrogen changes respectively continuously between both points; and is composed of the hard coating layer that the maximum inclusion point of Al and oxygen is composed of the specific composition ratio, and an interval between the maximum inclusion point of adjacent Al and oxygen, and the maximum inclusion point of Ti and nitrogen is 0.01 to 0.1μm. COPYRIGHT: (C)2005,JPO&NCIPI
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