COATED CUTTING TOOL

原文（中国語）

A coated cutting tool comprises a substrate and a coating layer formed on a surface of the substrate, wherein the coating layer comprises a lower layer and an upper layer formed on a surface of the lower layer, the lower layer comprises a specific Ti compound layer, an average thickness of the lower layer is 3.0 μm or more and 15.0 μm or less, the upper layer comprises an α-AlOlayer, an average thickness of the upper layer is 3.0 μm or more and 15.0 μm or less, (Σ3+Σ11)/all grain boundaries is 15% or more in the lower layer, Σ11/(Σ3+Σ11) is 20% or more in the region A of the lower layer, and Σ11/(Σ3+Σ11) is 0% or more and less than 20% in the region B of the lower layer.