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US 6,824,601 B2Granted
Hard film for cutting tools, cutting tool coated with hard film, process for forming hard film, and target used to form hard film
AssigneeKobe Steel, Ltd.
InventorsKenji Yamamoto, Toshiki Satou, Yasuomi Morikawa, Koji Hanaguri, Kazuki Takahara
Life of this patent
Estimating the term…
Abstract
A hard film for cutting tools which is composed of (Ti1−a−b−c−d, Ala, Crb, Sic, Bd)(C1−aNe) 0.5≦a≦0.8, 0.06≦b, 0≦c≦0.1, 0≦d≦0.1, 0≦c+d≦0.1, a+b+c+d<1, 0.5≦e≦1 (where a, b, c, and d denote respectively the atomic ratios Al, Cr, Si, and B, and e denotes the atomic ratio of N.)
Claims14
A hard film for cutting tools, comprising
- (Ti 1−a−b−c−d,Ala, Crb, Sic, Bd)(C1−eNe),
- wherein 0.5≦a≦0.8, 0.06≦b, 0≦c≦0.1,0≦d≦0.1,0<c+d≦0.1, a+b+c+d<1, 0.5≦e≦1 and
- wherein a, b, c, and d denote respectively the atomic ratios of Al, Cr, Si, and B, and e denotes the atomic ratio of N with the proviso that at least one of c and d is larger than 0.
The hard film for cutting tools as defined in claim 8, wherein the diffracted ray from the (111) plane has a half width not larger than 1°.
Dependencies are inferred from the claim text.