HARD COATING, CUTTING TOOL AND METHOD OF MANUFACTURING HARD COATING

摘要

PROBLEM TO BE SOLVED: To provide a hard coating with which a long-life cutting tool can be manufactured, the cutting tool, and method of manufacturing the hard coating.SOLUTION: A hard coating includes two first crystal phases and a second crystal phase arranged between the two first crystal phases. The two first crystal phases each independently include a structure having a TiAlN phase having a sodium chloride type crystal structure and an AlTiN phase having a sphalerite type crystal structure laminated alternately. Here, 0.1≤x1≤0.7 holds for an Al composition ratio x1 of the TiAlN phase, 0.7