| 摘要 |
<p>A surface-coated cermet cutting tool comprising a TiCN layer which has an average layer thickness of 2.5 to 15 µm and indicates a tilt-angle frequency distribution graph in which the highest peak exists in a tilt angle section ranging 0 to 10° and the total sum of frequencies existing in the range of 0 to 10° occupies a ratio of 45% or more of the total frequencies in the tilt-angle frequency distribution graph, the tilt-angle frequency distribution graph being obtained by utilizing a field-emission scanning electron microscope, irradiating electron beams to individual crystal particles with a cubic crystal lattice existing in a measurement range of a polished plane, measuring a tilt angle formed by the normal line of the polished plane and the normal line of (112) plane as a crystal plane of a crystal particle, sectioning the measured tilt angles belonging to a range of 0 to 45° every pitch of 0.25°, and collecting the frequencies existing in each section.</p> |
