Patent ID: 10227687

Abstract:
A hard lubrication film, with which a surface of a base material is coated, has two or more alternately laminated layers that are one or more A-layers made of (CraMobWcVdBe)1−x−yCxNy and one or more B-layers made of (CraMobWcVdBe)1−x−y−zCxNyOz. Atom ratios a, b, c, d, e=1−a−b−c−d, x+y, and y related to A-layers satisfy 0.2≤a≤0.7, 0.05≤b≤0.6, 0≤c≤0.3, 0≤d≤0.05, 0≤e≤0.05, 0.3≤x+y≤0.6, and 0≤y≤0.6, respectively. Atom ratios a, b, c, d, e=1−a−b−c−d, x, y, z, and x+y+z related to B-layers satisfy 0.2≤a≤0.7, 0.05≤b≤0.6, 0≤c≤0.3, 0≤d≤0.05, 0≤e≤0.05, 0≤x≤0.6, 0≤y≤0.6, 0<z≤0.6, and 0.3≤x+y+z≤0.6, respectively. Each A-layer has a film thickness within a range of 2 nm or more to 1000 nm or less, each B-layer has a film thickness within a range of 2 nm or more to 500 nm or less, and wherein the hard lubrication film has a total film thickness within a range of 0.1 μm or more to 10.0 μm or less.