The surface coating which shows the resistance abrasiveness where hard carpet course is superior under high-speed cutting conditions the cemented carbide make cutting tool and on the surface

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 cutting tool is formed by physically depositing the hard coating layer composed of a composite oxynitride layer of Al, Ti, and Zr in the average layer thickness of 1 to 15 μm; 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 and continuously between both points; and is composed of the hard coating layer that the maximum inclusion point of Al and oxygen satisfies 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 0.1 μm.;COPYRIGHT: (C)2005,JPO&NCIPI