Cutting tool

A cutting tool comprising:

• a substrate;
• and
• a coated film arranged on the substrate, wherein
• the coated film includes a first layer,
• the first layer includes a plurality of crystal grains, and
• the crystal grains are composed of alxTi1-xCyN1-y,
• where x is more than 0.65 and less than 0.95, and
• y is not less than 0 and less than 0.1,
• wherein
• in a first region, the crystal grains have an average aspect ratio of not more than 3.0, where the first region is a region that is sandwiched between a surface S1 of the first layer or an interface S2 on a surface side of the first layer and a first virtual plane VS1, and
• in a second region, the crystal grains have an average aspect ratio of more than 3.0 and not more than 10.0, where the second region is a region that is sandwiched between the first virtual plane VS1 and an interface S3 on a substrate side of the first layer,
• where the first virtual plane VS1 passes through a point that is 1 μm away from the surface S1 or the interface S2 on the substrate side, and is parallel to the surface S1 or the interface S2,
• wherein
• the crystal grains include crystal grains having a cubic crystal structure,
• the first layer has a ratio of an area occupied by the crystal grains having a cubic crystal structure of not less than 90%,
• the average aspect ratios and the area ratio are measured on a cross section along a normal to an interface between the substrate and the coated film, and
• the first layer has a thickness of not less than 2 μm and not more than 20 μm.