US 12,440,900 B2
Cutting tool
Nozomi Tsukihara, Osaka (JP); and Haruyo Fukui, Osaka (JP)
Assigned to SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
Appl. No. 19/102,429
Filed by Sumitomo Electric Industries, Ltd., Osaka (JP)
PCT Filed Mar. 19, 2024, PCT No. PCT/JP2024/010809
§ 371(c)(1), (2) Date Feb. 10, 2025,
PCT Pub. No. WO2025/196966, PCT Pub. Date Sep. 25, 2025.
Prior Publication US 2025/0296151 A1, Sep. 25, 2025
Int. Cl. B23B 27/14 (2006.01)
CPC B23B 27/148 (2013.01) [B23B 2200/36 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A cutting tool, comprising a substrate and a coating disposed on the substrate,
wherein the coating comprises a first layer,
the first layer is composed of AlaTibCr(1−a−b−c−d)SicCudN, and
the a, the b, the c, and the d satisfy
0.50≤a≤0.75,
0.10≤b≤0.25,
0.005≤c≤0.20,
0.005≤d<0.10, and
a+b+c+d<1.