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US 9,850,567 B2Granted
Hard coating and target for forming hard coating
AssigneeKobe Steel, Ltd.
InventorKenji Yamamoto
Life of this patent
Estimating the term…
Abstract
Provided is a hard coating having, in particular, excellent oxidation resistance, high hardness, and excellent abrasion resistance as compared with conventional hard coatings such as TiSiN, TiAlSiN, TiCrAlSiN, and AlCrSiN coatings. The hard coating according to the present invention has a compositional formula of (TiαCr1-α)1-aGea(C1-xNx), where the atomic ratios of the elements satisfy the expressions: 0≦α≦1, 0.010≦a≦0.20, and 0.5≦x≦1.
Claims8
A hard coating having a compositional formula of (TiαCr1-α)1-a-bGeaSibMz(C1-xNx), an oxidation onset temperature of 950° C. or higher, and a hardness of 25 GPa or more;
- where M is at least one element selected from the group consisting of:
- Group 4 elements excluding Ti;
- Group 5 elements;
- Group 6 elements excluding Cr;
- Sc;
- Y;
- B;
- and
- rare-earth elements, each specified in the periodic table;
- and
- where the ratios α, a, b, x, and z meet the following conditions:
- 0≦α≦1;
- 0.010≦a≦0.20;
- 0.10≦b≦0.29;
- 0.15≦(a+b)≦0.30;
- 0.5≦x≦1;
- and
- 0≦z≦0.20 relative to all the elements comprising Ti, Cr, the at least one element M, Ge, and Si.
15 more elements
Dependencies are inferred from the claim text.