US 12,440,899 B2
Cutting tool
Haruyo Fukui, Osaka (JP); Nozomi Tsukihara, Osaka (JP); and Toshihiro Tabata, Osaka (JP)
Assigned to SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
Appl. No. 18/722,604
Filed by Sumitomo Electric Industries, Ltd., Osaka (JP)
PCT Filed Nov. 29, 2023, PCT No. PCT/JP2023/042712
§ 371(c)(1), (2) Date Jun. 21, 2024,
PCT Pub. No. WO2025/115121, PCT Pub. Date Jun. 5, 2025.
Prior Publication US 2025/0170654 A1, May 29, 2025
Int. Cl. B23B 27/14 (2006.01); C23C 14/06 (2006.01)
CPC B23B 27/14 (2013.01) [C23C 14/0617 (2013.01); C23C 14/0641 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A cutting tool, comprising:
a base; and
a coating disposed on the base, wherein
the coating includes a second layer,
the second layer is composed of alternating layers in which a first unit layer and a third unit layer are alternately stacked,
the first unit layer is composed of Ti1-aMoaN,
a represents 0.01 or more and 0.20 or less,
the third unit layer is composed of AlcV1-c-dXdN,
X represents one or two selected from the group consisting of boron, silicon, scandium, yttrium, and cerium,
c represents 0.40 or more and 0.80 or less, and
d represents 0.001 or more and 0.05 or less.