Hard coating film, method of formation thereof, and material coated with hard coating film
AssigneeKobe Steel, Ltd.
InventorsKenji Yamamoto, Shohei Nakakubo
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Abstract
A hard coating film having wear resistance superior to conventional TiAlN coating films, oxide coating films, and the like. The hard coating film of the present invention has a component composition represented by one of the following two formulas: (TiaAlbSic)Ox, wherein 0.3≦a≦0.7, 0.3≦b≦0.7, 0≦c≦0.2, a+b+c=1, and 0.8≦[x/(2a+1.5b+2c)]≦1.2; and (TiaCrdAlbSic)Ox, wherein 0.05≦a≦0.4, 0.1≦d≦0.85, 0≦b≦0.7, 0≦c≦0.2, a+b+c+d=1, and 0.8≦[x/(2a+1.5d+1.5b+2c)]≦1.2; where variables a, d, b, and c denote the atomic ratios of Ti, Cr, Al, and Si respectively, and variable x indicates the atomic ratio of O.
Claims13
A hard coating film formed on the surface of a substrate, wherein the hard coating film is represented by the formula:
- (TiaCrdAlbSic)Ox
- wherein
- 0.05≦a≦0.4
- 0.1≦d≦0.85
- 0.1≦b≦0.7
- 0≦c≦0.2
- a+b+c+d=1
- 0.8≦[x/(2a+1.5d+1.5b+2c)]≦1.2
- where variables a, d, b, and c denote the atomic ratios of Ti, Cr, Al, and Si respectively, and variable x indicates the atomic ratio of O,
- wherein the substrate is a substrate of a member selected from the group consisting of cutting tools, metal dies, jigs and plastic metal working tools.
Dependencies are inferred from the claim text.