Surface-coated cutting tool and method for manufacturing the same

A surface-coated cutting tool having a rake face and a flank face,

• the surface-coated cutting tool comprising a base material and a coating formed on the base material,
• the base material being a cemented carbide or a cermet,
• the base material having a surface,
• the surface including the rake face, the flank face, and a cutting edge face connecting the rake face to the flank face,
• the base material having an oxygen concentration of less than or equal to 1 at. % at a depth position of 0.4 μm from the cutting edge face,
• the coating including an aluminum oxide layer containing a plurality of aluminum oxide crystal grains,
• the aluminum oxide layer including:
• a first region made up of a region A on the rake face and a region B on the flank face;
• a second region on the rake face except for the region A;
• and
• a third region on the flank face except for the region B,
• the region A being a region from an edge ridgeline to an imaginary line on the rake face, wherein the edge ridgeline is a line at which an imaginary extension of the rake face and an imaginary extension of the flank face cross each other, and the imaginary line on the rake face is a line extending along the edge ridgeline and located 1 mm away from the edge ridgeline,
• the region B being a region from the edge ridgeline to an imaginary line on the flank face, wherein the imaginary line on the flank face is a line extending along the edge ridgeline and located 1 mm away from the edge ridgeline,
• the aluminum oxide layer satisfying a relation:
• b−a>0.5, where a is an average value of a TC(006) in the first region in texture coefficient TC(hkl), and b is an average value of the TC(006) in the second region or the third region in texture coefficient TC(hkl).