Patent ID: 11872663
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 0:
1. A repair welding method for a member in which a first end and a second end of a parent material are connected by welding, comprising:
a step of removing a portion including at least a part of a first heat-affected zone of an existing welded portion of the member; and
a step of performing repair welding after removing the portion,
wherein, in a cross-section including the parent material and the existing welded portion, all intersection portions between the first heat-affected zone of the existing welded portion and a second heat-affected zone due to the repair welding have an intersection angle between the first heat-affected zone and the second heat-affected zone of 70° to 110°,
wherein, in a cross-section including the parent material and the existing welded portion, the repair welding is performed from the parent material on a first end side to a weld metal of the existing welded portion, and
wherein an intermediate position between a position of the second heat-affected zone appearing on a surface of the parent material on the first end side and a position of the second heat-affected zone appearing on a surface of the weld metal of the existing welded portion is at the weld metal of the existing welded portion before removing the portion including at least a part of the first heat-affected zone.