The surface coating where resistance abrasiveness is superior cemented carbide make cutting tool

摘要

PROBLEM TO BE SOLVED: To provide a surface-coated cemented carbide cutting tool with excellent wear resistance.;SOLUTION: This surface-coated cemented carbide cutting tool is formed by physically depositing a touch coating layer, comprising one type of single layer or two types of multiple layers of a compound nitride layer and compound carbonitride layer of Ti and Al having an average layer thickness of 0.5 to 15 μm, on the surface of a tool base body formed of a tungsten carbide based cemented carbide or a titanium carbonitride based cermet through an adhesive substrate coated layer formed of one type of single layer or two types of multiple layer of a carbide layer, nitride layer, and carbonitride layer of Ti having an average layer thickness of 0.1 to 10 μm. On that surface, as a wear resistance coating layer, an aluminum oxide based layer of 0.5 to 15 μm in average layer thickness, formed by substitutive solution of a part of Al with one or two or more types of Ti, Zr, and Hf with a ratio of 0.01 to 10 atomic % in content relative to Al, with the crystal structure of an aluminum oxide held undisturbed.;COPYRIGHT: (C)2001,JPO