Patent ID: 11939879
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC F  B  C | IPC B  F

Claim 4:
5. A blade comprising:
a blade body that is disposed in a combustion gas flow channel in which combustion gas flows and has an airfoil shape; and
a platform that is provided at an end of the blade body in a blade height direction, extends in a blade width direction including a direction perpendicular to the blade height direction, and partitions a part of an edge of the combustion gas flow channel,
wherein the platform includes:
a notched portion, which is recessed toward the blade body from an end surface of the platform and includes a first region positioned close to the blade body and a second region positioned closer to the end surface of the platform than the first region, formed by removing a crack-containing region in which a crack, occurs;
a first welded portion that is disposed to fill the first region and is made of a first welding material; and
a second welded portion that is disposed to fill the second region and is made of a second welding material,

wherein high-temperature strength of the second welding material is higher than high-temperature strength of the first welding material,
weldability of the first welding material is higher than weldability of the second welding material,
in a case where an end surface of the second welded portion disposed close to the end surface of the platform is used as a reference, a thickness of the second welded portion in a direction toward the blade body from the end surface of the second welded portion is in a range of 1.0 mm to 3.0 mm,
the first region includes a penetrating portion that penetrates the platform in a thickness direction of the platform and a non-penetrating portion that does not penetrate the platform, and
the penetrating portion is formed to remove a position at which the crack is formed.