Patent ID: 11969801
Assignee: KYOCERA CORPORATION
Field: Surface technology, coating (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 0:
1. A coated tool, comprising:
a base; and
a coating layer on the base,
the coated tool comprising a first surface, a second surface adjacent to the first surface, and a cutting edge on at least a part of a ridge part of the first surface and the second surface, wherein
the coating layer comprises:
a Ti-based coating layer, and
an Al2O3 layer on the Ti-based coating layer,

the Ti-based coating layer comprises:
a first region where a fracture toughness value of the Ti-based coating layer is 10 MPa·m0.5 or more, and
a second region where the fracture toughness value is less than 10 MPa·m0.5,

the fracture toughness value of the Ti-based coating layer is measured on a surface of the coating layer parallel to a surface of the base,
the second region is located 1 mm or more away from the cutting edge in directions along the first surface and the second surface, and
the first region extends from the cutting edge to the second region.