COATED CUTTING TOOL

原文（中国語）

A coated cutting tool comprising a substrate and a coating layer formed on a surface of the substrate, wherein the coating layer comprises a lower layer, an intermediate layer, and an upper layer, the lower layer comprises a specific Ti compound layer, the intermediate layer comprises an α-AlOlayer, the upper layer comprises a TiCN layer, an average thickness of the entire coating layer is 8.5 μm or more and 30.0 μm or less, an average thickness of the upper layer is 1.0 μm or more and 6.0 μm or less, an average diameter of the specific regions is 0 degrees or more and less than 15 degrees is less than 5.0 μm in the TiCN layer of the upper layer, and 30≤RSA≤70 and 20≤RSB≤60 are satisfied in the TiCN layer of the upper layer.