| 摘要 |
A cutting tool in which wear resistance is improved by suppressing sudden chipping on the flank face while suppressing oxidation of the coating layer on the rake face, and thereby has a long lifespan even under cutting conditions in which deposition and edge damage easily occur. In the cutting tool, a coating layer represented by Ti1-a-b-cAlaWbMc(C1-xNx), with M selected as at least one of silicon, yttrium, and a metal belonging to group 4, 5, or 6 on the periodic table, excluding titanium and tungsten, and 0.3≦a≦0.6, 0.01≦b≦0.2, 0≦c≦0.2, and 0≦x≦1, being provided on the surface of a main cutting tool body having a flank face and a rake face, and the content ratio of tungsten on the flank face is higher than the content ratio of tungsten on the rake face. |
| 主权项 |
1. A cutting tool comprising:
a cutting tool substrate provided with a rake face and a flank face; and a coating layer that is formed on a surface of the rake face and the flank face;wherein
the coating layer is represented by Ti1-a-b-cAlaWbMc(C1-xNx), M being selected as at least one from the group consisting of Si, Y, Group-IV, V, and VI metals, excluding Ti and W, in the periodic table; wherein the content correlations measured in a molar fraction are 0.3≦a≦0.6; 0.01≦b≦0.2; 0≦c≦0.2; and 0≦x≦1, and a content of W in the coating layer at the flank face is higher than the content of W at the rake face; and the coating layer comprises droplets thereon, and the content of W in the droplets at the flank face is lower than the content of W in the droplets at the rake face. |
