Cutting tool having hard coating with excellent wear resistance and toughness

Abstract

A cutting tool having a hard coating capable of satisfying various physical properties such as wear resistance, toughness, oxidation resistance, and heat crack resistance in a well-balanced manner is described. In order to achieve the above purpose, an embodiment provides a cutting tool that includes a hard base material and a hard coating formed on the hard base material, wherein the hard coating has the structure in which two or more sub-coatings having the composition range represented by the following [Chemical formula 1] and being different in lattice constant are alternately laminated. [Chemical formula 1] Al(1-x-y-z) TixZryMezCaObN(1-a-b) (0<x<0.48, 0<y≤0.8, 0<z≤0.25, Me includes at least one selected from Cr, Ta, Hf, Nb, V, Y, W, Mo, Si, and B, 0<a<0.03 and 0<b<0.03)).

Dependencies are inferred from the claim text.