Patent ID: 8623525

Claim:
A cutting tool comprising: a cutting tool substrate provided with a rake face and a flank face; a cutting edge at a ridgeline between the rake face and the flank face; a coating layer that coats surfaces of the substrate including the rake face and the flank face, wherein the coating layer comprises Ti a Al b M d (C 1-x N x ), (M being selected as at least one element from the group consisting of Si, W, Nb, Mo, Ta, Hf, Cr, Zr, and Y, in the content ranges of 0.35≦a≦0.55, 0.3≦b≦0.6, 0≦d≦0.25, a+b+d=1, and 0≦x≦1); and droplets on a surface of the coating layer, wherein said: droplets at the rake face have a higher average content ratio of Al than the coating layer at the rake face, and droplets at the flank face have a higher average content ratio of Ti than the coating layer at the flank face.