Coated cutting tool

Abstract

A coated cutting tool, comprising: a substrate; and a coating layer formed on the substrate, wherein the coating layer includes a lower part layer and an upper part layer formed on the lower part layer, the lower part layer has an average thickness of 2.0 μm or more and 15.0 μm or less, and is formed of a Ti oxycarbonitride layer including a compound having a composition represented by formula (1) below:Ti(CNO)  (1)(where, x denotes an atomic ratio of an N element based on a total of a C element, the N element, and an O element, y denotes an atomic ratio of the O element based on a total of the C element, the N element, and the O element, and 0.35≤x≤0.60 and 0.01≤y≤0.10 are satisfied),a FWHM of a rocking curve of a plane (4,2,2) of the lower part layer, which is obtained through X-ray diffraction, is 20° or less, the upper part layer is formed of an α-aluminum oxide layer having an average thickness of 1.0 μm or more and 15.0 μm or less, and a FWHM of a rocking curve of a plane (0,0,12) of the upper part layer, which is obtained through X-ray diffraction, is 20° or less.