| 摘要 |
PROBLEM TO BE SOLVED: To provide a long-life cutting tool, heightening the adhesiveness of a hard coating layer without the occurrence of separation of an aluminum oxide layer even under such a severe cutting condition that strong shock is applied to a cutting edge of a tool in intermittent cutting or the like, and having excellent defective resistance and wear resistance. SOLUTION: In this surface coated cutting tool 1, the surface of a substrate 2 is coated with a carbonitride titanium layer 4 made of at least columnar particles, and the aluminum oxide layer 6 is coated as an upper layer thereof. When the section of the surface coated cutting tool 1 is observed with a scan type electronic microscope, spherical titanium compound particles 7 as a part of the carbonitride titanium layer 4 are buried in the vicinity of interface with the carbonitride titanium layer 4 in the aluminum oxide layer 6. COPYRIGHT: (C)2006,JPO&NCIPI
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