| abstract |
This is to provide a coated cutting tool excellent in wear resistance, chipping resistance and fracture resistance than those of the conventional tools. n The coated cutting tool comprises 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 I c , a peak intensity at a (101) plane of the hexagonal NbN is made I h1 , and a sum of peak intensities at a (103) plane and a (110) plane of the hexagonal NbN is made I h2 in X-ray diffraction analysis, a ratio [I h1 /(I h1 +I c )] of I h1 based on a sum of I c and I h1 is 0.5 or more and less than 1.0, and a ratio [I h1 /(I h1 +I h2 )] of I h1 based on a sum of I h1 and I h2 is 0.5 or more and 1.0 or less. |