| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface coated cemented carbide cutting tool with excellent wear resistance. SOLUTION: In the surface coated cemented carbide cutting tool made by physically depositing a tough coating layer made of one kind of single layer or two kinds of multilayers of a composite nitride layer and a composite carbonitride layer of Ti and Al having average thickness of 0.5 to 15μm on the surface of a tool substrate made of tungsten carbide group cemented carbide or titanium carbonitride group cermet via an adhesive substrate coating layer of one kind of single layer or two kinds of multilayers of a carbide layer, a nitride layer and a carbonitride layer of Ti having average thickness of 0.1 to 10μm, an aluminum oxide main body layer made by substituting a part of Al by one kind or not less than two kinds of Ta, V, Nb, W, Mo and Cr of 5 to 20 atomic percent of the total amount with Al to bring a solid solution is physically deposited as a wear resistant coating layer by average thickness of 0.5 to 15μm on the surface of the tool in a state that a crystal structure of aluminum oxide is held.
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