COATED CUTTING TOOL AND METHOD FOR PRODUCING SAME

摘要

The present invention provides a coated cutting tool that has: a substrate; an intermediate coating film comprising a carbide containing tungsten (W) and titanium (Ti) and having a film thickness of 1-10 nm; and a hard coating film comprising an AlTi-based nitride or carbonitride having a crystal structure that is a face-centered cubic lattice structure, and having an Al content (atom%) of at least 60% and a Ti content (atom%) of at least 20%. Of the hard coating film, in a strength profile according to a selected area diffraction pattern in a transmission electron microscope, when the peak strength caused by the AlN (010) plane of a hexagonal closest packing structure is Ih, and the total of the peak strength caused by the AlN (111) plane, the TiN (111) plane, the AlN (002) plane, the TiN (002) plane, the AlN (022) plane and the TiN (022) plane in the face-centered cubic lattice structure and the peak strength caused by the AlN (010) plane, the AlN (011) plane, and the AlN (110) plane in the hexagonal closest packing structure is Is, Ih×100/Is≤20.