OUTIL DE COUPE REVÊTU EN SURFACE DANS LEQUEL UNE COUCHE DE REVÊTEMENT DURE PRÉSENTE UNE RÉSISTANCE EXCEPTIONNELLE À L'ADHÉSION ET UNE RÉSISTANCE ACCRUE AUX DOMMAGES

摘要

A surface-coated cutting tool in which a hard coating layer exhibits exceptional adhesion resistance and anomalous damage resistance is provided. This surface-coated cutting tool includes a tool body composed of a WC based cemented carbide or a TiCN based cermet; and at least one hard coating layer provided on a surface of the tool body, and; 1) the hard coating layer includes at least one complex nitride layer in which x and y satisfy 0.05 ≤ x ≤ 0.95 and 0 < y ≤ 1.0, respectively, where x is a content ratio of a total amount of Zr and Hf to a total amount of Ti, Zr, and Hf, and y is a content ratio of Zr to a total amount of Zr and Hf (here, all of x and y are atomic ratios), in a case where the complex nitride layer is expressed by a compositional formula (Ti