US 11,813,677 B1
Cutting tool
Fumiyoshi Kobayashi, Osaka (JP); Anongsack Paseuth, Osaka (JP); and Haruko Harada, Osaka (JP)
Assigned to SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
Appl. No. 18/026,148
Filed by Sumitomo Electric Industries, Ltd., Osaka (JP)
PCT Filed Aug. 30, 2022, PCT No. PCT/JP2022/032596
§ 371(c)(1), (2) Date Mar. 14, 2023,
.
Int. Cl. B23B 27/14 (2006.01); C04B 35/58 (2006.01)
CPC B23B 27/14 (2013.01) [C04B 35/58021 (2013.01); B23B 2228/10 (2013.01); C04B 2235/3856 (2013.01); C04B 2235/728 (2013.01); C04B 2235/762 (2013.01); C04B 2235/78 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A cutting tool comprising a substrate and a coating film disposed on the substrate, wherein the cutting tool comprises:
a rake face;
a flank face contiguous to the rake face; and
a cutting edge region composed of a boundary part between the rake face and the flank face, wherein
the coating film includes a TiSiCN layer,
the TiSiCN layer has:
a first TiSiCN layer positioned in the rake face; and
a second TiSiCN layer positioned in the cutting edge region,
the first TiSiCN layer has a composition of Ti(1-Xr)SiXrCN,
the second TiSiCN layer has a composition of Ti(1-Xe)SiXeCN, and
the Xr and the Xe each represent 0.010 or more and 0.100 or less, and satisfy a relationship of Xe-Xr≥0.003.