| 摘要 |
PROBLEM: To provide a cutting tool that includes a coating layer capable of exhibiting optimum cutting performance in each of a cutting edge, rake face, and flank face. RESOLUTION MEANS: A cutting tool (1) comprising a coating layer (6) coated on a substrate (2),said coating layer (6)composed of Si a M 1-a (C 1-x N x ), where M represents at least one element selected from Ti, Al, Cr, W, Mo, Ta, Hf, Nb, Zr, and Y, 0.01 ‰¤ a ‰¤ 0.4, and 0 ‰¤ x ‰¤ 1, and a cutting edge (5) at an intersecting ridge line of a rake face (3) and a flank face (4). The Si content ratio in the coating layer (6) on the rake face (3) is higher than that on the cutting edge (5). |
