| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cutting tool having a long tool life even under such a cutting condition that an impact is intermittently applied to a cutting blade in such a case that a rotary tool is cut and processed. Ž<P>SOLUTION: The cutting tool has a base body whose surface is coated with a coating layer comprising a nitride or a carbon nitride containing Ti and Al. When diffraction angles of diffraction peaks of a (111) surface and a (200) surface of the coating layer in the X ray diffraction measurement of the Cu-Kα line are 2θ<SB>(111)</SB>and 2θ<SB>(200)</SB>, respectively, the values 2θ<SB>(111)N</SB>and 2θ<SB>(200)N</SB>measured at the unpolished surface of the coating layer are detected at a side having a smaller angle of 0.1° or larger than the values 2θ<SB>(111)G</SB>and 2θ<SB>(200)G</SB>measured at a polished surface formed by obliquely polishing the coating layer with respect to a thickness direction. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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