| 摘要 |
PROBLEM TO BE SOLVED: To provide a hard film having excellent oxidation and abrasion resistances, compared with conventional films.SOLUTION: A hard film having excellent abrasion and oxidation resistances comprises a layer A and a layer B having different compositions and laminated together. The layer A is one selected from the group of a hard film of a normality of (Al,Cr)(CN), a hard film of a normality of (Al,Si,B,Cr)(CN) and a hard film of a normality of (Al,Si,B,Ti)(CN), and the layer B is a hard film of a normality of (M,Si,B)(CN), where M is W and/or Mo. The layers A and B are laminated in such a way as to meet the equation (1): 0.5(nm)≤(the thickness of the layer B)≤(the thickness of the layer A). |
