| 摘要 |
PROBLEM TO BE SOLVED: To provide a physically deposited hard film covering tool capable of corresponding to drying and accelerating high hard steel cutting work after thermal treatment and restraining deterioration of film hardness even under high temperature. SOLUTION: The hard film covering tool to cover at least one layer of hard layers constituted of a metal element made of Ti, Al and Si and at least one kind of elements selected from B, C, N and O on a tool base body is constituted by interposing a nitride phase of Si in the hard layer.
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