Cutting tool

摘要

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. A cutting tool (1) includes a substrate (2) that is coated with a coating layer (6) composed of SiaM1-a(C1-xNx), 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 that has 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).

主权项

1. A cutting tool with a rake face, a flank face, and a cutting edge at an intersecting ridge line of the rake face and the flank face comprising:
a substrate; and a coating layer that is coated on the substrate and that is having an average composition represented by SiaM1-a(C1-xNx), 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, the coating layer comprising a rake face portion in a region of the rake face, a flank face portion in a region of the flank face, and a cutting edge portion in a region of the cutting edge; and wherein a Si content ratio of the rake face portion is higher than a Si content ratio of the cutting edge portion.