| 摘要 |
<p>Disclosed is 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 Ti 1-a-b Al a W b M c (C 1-x N x ) (provided that M is at least one selected from silicon, yttrium, and a metal belonging to group 4, 5, or 6 on the periodic table, excluding titanium and tungsten, and that 0.3 ‰¦ a ‰¦ 0.6, 0.01 ‰¦ b ‰¦ 0.2, 0 ‰¦ c ‰¦ 0.2, and 0 ‰¦ x ‰¦ 1) is 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.</p> |
