Back to results
US 12,186,812 B2Granted
Cutting tool
AssigneeSumitomo Electric Industries, Ltd.
InventorsHaruyo Fukui, Nozomi Tsukihara, Toshihiro Tabata
Life of this patent
Estimating the term…
Abstract
A cutting tool, including: a base; and a coating disposed on the base, wherein the coating includes a first layer, the first layer is composed of an alternate layer in which a first unit layer and a second unit layer are alternately stacked, the first unit layer has a hexagonal crystal structure, the first unit layer is composed of W(C1-aNa)x, a represents 0.3 or more and 0.8 or less, x represents 0.8 or more and 1.2 or less, the second unit layer is composed of AlcCr1-cN, and c represents 0.40 or more and 0.80 or less.
Claims9
A cutting tool, comprising:
- a base;
- and
- a coating disposed on the base, wherein
- the coating includes a first A layer,
- the first A layer is composed of an alternate layer in which a first unit layer and a third unit layer are alternately stacked,
- the first unit layer has a hexagonal crystal structure,
- the first unit layer is composed of W(C1-aNa)x,
- a represents 0.3 or more and 0.8 or less,
- x represents 0.8 or more and 1.2 or less,
- the third unit layer is composed of AldCr1-d-eMeN,
- M represents silicon, boron, yttrium, cerium, or lanthanum,
- d represents 0.40 or more and 0.80 or less, and
- e represents more than 0 and 0.05 or less.
10 more elements
Dependencies are inferred from the claim text.