Coated cutting tool

Abstract

The present invention provides a coated cutting tool having excellent wear resistance and controlled brittleness. A coated cutting tool according to an embodiment of the present invention includes a substrate and a cutting layer disposed on the substrate, the cutting layer including a brittleness suppression layer and a wear resistant layer disposed on the brittleness suppression layer, the substrate including a hard alloy body of cemented carbide, cermet, ceramic, cubic boron nitride-based material, or high speed steel, the brittleness suppression layer including a first layer and a second layer disposed on the first layer, the first layer and the second layer each independently including (Al b Ti 1‑b )X(0.6<b<0.8, X is at least one selected from N, C, CN, NO, CO, CNO) and (Ti c Al 1‑c )X(0.4

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