| abstract |
A cutting tool comprising a substrate having a rake face and a coating covering the rake face, wherein the coating includes an α-Al 2 O 3 layer provided on the substrate, and the α-Al 2 O 3 layer has an α-Al 2 O 3 layer of α. The α-Al 2 O 3 layer contains crystal grains of —Al 2 O 3 , and the area ratio of the (001) -oriented crystal grains on the rake face is 50% to 90%, and 2θ-sin 2 using X-rays is used. In the residual stress measurement by the ψ method, the residual stress A A in the film determined based on the crystal plane spacing of the (001) plane of the α-Al 2 O 3 layer on the rake face is more than 0 MPa and 2000 MPa or less, A cutting tool, wherein a residual stress B A in the film determined based on a crystal plane interval of the (110) plane of the α-Al 2 O 3 layer on the rake face is −1000 MPa or more and less than 0 MPa. |