| 摘要 |
<p>Disclosed is a cutting tool having excellent wear resistance. Specifically disclosed is a cutting tool having a substrate and a coating layer formed on a surface of the substrate. The cutting tool is characterized in that the substrate contains at least cobalt; the coating layer includes at least a titanium nitride layer formed on the surface of the substrate, a titanium carbonitride layer formed on the surface of the titanium nitride layer, an intermediate layer formed on the surface of the titanium carbonitride layer and an aluminum oxide layer formed on the surface of the intermediate layer; the intermediate layer contains at least oxygen and titanium, and the aluminum oxide layer incorporates particles composed mainly of cobalt.
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