| 摘要 |
<p>A cutting tool with a hard coating layer coating a surface of a substrate formed of a hard sintered body, the hard coating layer being harder than the substrate. A polishing is performed on a cutting edge part ranging from a rake face side on a surface of the hard coating layer to a flank face side with a crossing ridge interposed therebetween. The polishing is performed so that a crack is present in a polished surface, and a depth of an adjacent region of the crack increases gradually with decreasing distance to the crack. This enables to provide the cutting tool having an excellent wear resistance and having an improvement in the chipping resistance of the cutting edge.</p> |
