| 摘要 |
The present invention relates to a multilayer hard coating wherein the coating has been produced by repeatedly depositing
(1) a thin layer comprising a nitride or a carbonitride of TiAl and/or a thin layer comprising a nitride or a carbonitride of CrAl, and
(2) a thin layer having an average composition satisfying the following composition (a) or (b), wherein
the periodicity is not more than 80 nm;
composition (a):
(Al 1-a V a ) (C 1-x N x ) wherein
0.27 ‰¤ a ‰¤ 0.75, and
0.3 ‰¤ X ‰¤ 1,
wherein a and X independently represent an atomic ratio;
composition (b):
(Al 1-a-b-c V a Si b B c ) (C 1-x N x ) wherein
0.1 ‰¤ a ‰¤ 0.75,
0 < b+c ‰¤ 0.20, and
0.3 ‰¤ X ‰¤ 1,
wherein a, b, c, and X independently represent an atomic ratio with the proviso that b and c are not simultaneously 0 while one of b and c may be 0. |
