Patent ID: 6855405

Claim:
A cutting tool made of a surface-coated carbide alloy having a wear-resistant coating layer which has excellent adhesion, comprising: a tungsten carbide-based carbide alloy substrate having an amorphous layer formed by an arc ion plating surface treatment in an average depth of 1 to 50 nm from the surface; and a wear-resistant coating layer deposited chemically and/or physically on the surface of the tungsten carbide-based carbide alloy substrate, wherein the wear-resistant coating layer comprises one layer or a plurality of two or more layers selected from the group consisting of a layer of carbide of Ti, a layer of nitride of Ti, a layer of carbonitride of Ti, a layer of carboxide of Ti and a layer of carbonitroxide of Ti, and mixtures thereof; and wherein the amorphous layer comprises an amorphous substance formed from the tungsten carbide-based carbide alloy substrate, and wherein said wear-resistant coating layer has an average thickness of 1 to 15 μm.