Coated cutting tool

Abstract

To provide a coated cutting tool capable of extending a tool life by having excellent wear resistance and chipping resistance.SOLUTION: The coating layer includes a lower layer and an upper layer formed on a surface of the lower layer, the lower layer includes a specific Ti compound layer, a mean thickness of the lower layer is 3.0 μm or more and 15.0 μm or less, the upper layer includes an α - Al2O3 layer, a mean thickness of the upper layer is 3.0 μm or more and 15.0 μm or less, and (Σ 3 + Σ 11) / total grain boundary is 15% or more in the lower layer, Σ 11 / (Σ 3 + Σ 11) is 20% or more in the region A of the lower layer, and Σ 11 / (Σ 3 + Σ 11) is 0% or more and less than 20% in the region B of the lower layer.SELECTED DRAWING: Figure 2

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