| abstract |
A surface-coated cutting tool excellent in both wear resistance and fracture resistance is provided. A surface-coated cutting tool of the present invention includes a base material and a coating layer, and the coating layer is composed of one or a plurality of layers, and in a cross-section cut at a specific plane, When the thickness of the thinnest part of the edge of the blade edge is T 1 and the thickness at a point 1 mm away from the edge of the edge of the rake face is T 2 , T 1 <T 2 is satisfied, and the surface of the coating layer When a point that is a distance D a away from the edge of the blade edge in the rake face direction is a and a point that is a distance D b away in the flank direction is b, D a and D b satisfy a specific numerical range. there are, in the coating layer from the point a to the point b, at least 10% of the area of the region E occupying thickness 0.1T 1 ~0.9T 1 from a surface, the crystal grains of the crystal orientation constituting the coating layer Deviation of 5 degrees or more and less than 10 degrees To. [Selection] Figure 1 |