| 摘要 |
PROBLEM TO BE SOLVED: To provide an aluminium oxide coated cutting tool which improves its service life to cope with such tendency that intermittent cutting under a sever condition is forced to meet such requirement as shortening the time for a cutting process and to make up for the insufficient chipping resistantance of the cutting edge of a conventional cutting tool coated with a film including aluminium oxide, and provide an abrasion resistant cutting tool, which is used typically for cutting a mold coated with a composite hard film including an aluminium oxide film, and improves its service life to improve productivity. SOLUTION: The aluminium oxide coated cutting tool whose 012 crystal face made ofαtype aluminium oxide has the highest X-ray diffraction strength and a coefficient for aggregation structure of TC (012) of 2.5 or more provides a tool property excellent in chipping resistance.
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