| 摘要 |
A hard coating film having oxidation resistance and wear resistance superior to those of conventional coating films formed of TiAlN, TiCrAlN, TiCrAlSiBN, CrAlSiBN, NbCrAlSiBN, or the like. The hard coating film of the present invention has a component composition represented by the formula:
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ(Ti a Cr b Al c M d B e ) (C x N 1-x ),
wherein 0 ‰¤ a ‰¤ 0.2, 0.05 ‰¤ b ‰¤ 0.4, 0.45 ‰¤ c ‰¤ 0.65, 0.005 ‰¤ d ‰¤ 0.05, 0 ‰¤ e ‰¤ 0.15, a + b + c + d + e = 1, and 0 ‰¤ x ‰¤ 0.5;
where M denotes at least one species selected from the group consisting of Ce, Pr, and Sc; variables a, b, c, d, and e indicate the atomic ratios of Ti, Cr, Al, M, and B respectively; and variable x indicates the atomic ratio of C.
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