Patent ID: 10189089

Abstract:
A coated cutting tool includes a substrate and a coating layer formed onto the surface of the substrate. The coating layer contains an outermost layer. The outermost layer contains NbN. The NbN contains cubic NbN and hexagonal NbN. When a peak intensity at a (200) plane of cubic NbN is made Ic, a peak intensity at a (101) plane of the hexagonal NbN is made Ih1, and a sum of peak intensities at a (103) plane and a (110) plane of the hexagonal NbN is made Ih2 in X-ray diffraction analysis, a ratio [Ih1/(Ih1+Ic)] of Ih1 based on a sum of Ic, and I1 is 0.5 or more and less than 1.0, and a ratio [Ih1/(Ih1+Ih2)] of Ih1 based on a sum of Ih1 and Ih2 is 0.5 or more and 1.0 or less.