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 |
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.
|