Hard coating film and method for forming the same
AssigneeKabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
InventorsKenji Yamamoto, Susumu Kujime
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Abstract
A hard coating film to be applied to the surface of a tool, which has a composition of (Cr1-a-bAlaSib) (BxCyN1-x-y) with atomic ratios specified below. 0<a≦0.4 0.05≦b≦0.35 0.25≦1-a-b≦0.9 0≦x≦0.15 0≦y≦0.5 or a composition of (M1-a-bAlaSib) (BxCyN1-x-y) with atomic ratios specified below. 0.05≦a≦0.5 0.1<b≦0.35 0≦x≦0.15 0≦y≦0.5 where M denotes Ti and Cr. The hard coating film for cutting tools has better wear resistance than conventional ones.
Claims31
A hard coating film to be applied to the surface of a tool, which has a composition of (Cr1-a-bAlaSib) (BxCyN1-x-y) with atomic ratios specified below.
- 0<a≦0.4
- 0.05≦b≦0.35
- 0.25≦1-a-b≦0.9
- 0≦x≦0.15
- 0≦y≦0.5
A hard coating film to be applied to the surface of a tool, which has a composition of (M1-a-bAlaSib) (BxCyN1-x-y) with atomic ratios specified below.
- 0.05≦a≦0.5
- 0.1<b≦0.35
- 0≦x≦0.15
- 0≦y≦0.5
- where M denotes Ti and Cr.
Dependencies are inferred from the claim text.