Coated cutting tool

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 and an upper layer formed on a surface of the lower layer,
• the lower layer comprises a Ti compound layer comprising one or more layers selected from the group consisting of a Ti carbide layer, a Ti nitride layer, a Ti carbonitride layer, a Ti oxycarbide layer, and a Ti oxycarbonitride 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-aluminum oxide layer,
• an average thickness of the upper layer is 3.0 μm or more and 15.0 μm or less,
• the Ti compound layer comprises at least one Ti carbonitride layer,
• the composition of the Ti carbonitride layer is represented by the following formula (i):
• Ti(CxN1-x) (i),
• wherein in the formula, x represents an atomic ratio of a C element to a total of the C element and an N element in the Ti carbonitride layer, and satisfies 0.65<x≤0.90, and
• in the Ti carbonitride layer, a texture coefficient TC(331) of a (331) plane represented by a following formula (1) is 1.5 or more and 4.0 or less:
• T
• ⁢
• C
• ⁡
• (
• 3
• ⁢
• 3
• ⁢
• 1
• )
• =
• I
• ⁡
• (
• 33
• ⁢
• 1
• )
• I
• 0
• ⁡
• (
• 3
• ⁢
• 3
• ⁢
• 1
• )
• ⁢
• {
• 1
• 8
• ⁢
• ∑
• I
• ⁡
• (
• hkl
• )
• I
• 0
• ⁡
• (
• hkl
• )
• }
• -
• 1
• ,
• (
• 1
• )
• wherein in the formula (1), I(hkl) represents a peak intensity of an (hkl) plane in X-ray diffraction of the Ti carbonitride layer, I0(hkl) represents an average value of a standard diffraction intensity of the (hkl) plane of Ti carbide in a JCPDS card number 32-1383 and a standard diffraction intensity of the (hkl) plane of Ti nitride in a JCPDS card number 32-1420, and (hkl) indicates eight crystal planes (111), (200), (220), (311), (331), (420), (422), and (511) and
• wherein grains constituting the Ti carbonitride layer have an average grain size of 0.3 μm or more and 2.0 μm or less.