Crack repair method for existing steel structure
AssigneeIHI Corporation
InventorsDaiki Okita, Naoyuki Matsumoto, Koutarou Inose
Life of this patent
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Abstract
A crack repair method includes a build-up welding step of performing build-up welding on a portion of an existing steel structure where a crack is generated while feeding a filler wire, and a laser beam piercing welding step of performing piercing welding using a laser beam on a filler material build-up portion caused by the build-up welding in the build-up welding step and the crack. The crack can be melted and repaired without lowering a toughness value regardless of an operation condition.
Claims2
A crack repair method for an existing steel structure that repairs a crack generated in the existing steel structure by using a filler material, the crack repair method comprising:
- a build-up welding step of performing build-up welding by arc welding or laser welding using the filler material on the crack generated in the existing steel structure to form a filler material build-up portion;
- and
- a laser beam piercing welding step of performing piercing welding by irradiating the filler material build-up portion with a laser beam such that a welding-repaired portion, in which the filler material build-up portion is melted, is formed around the crack.
Dependencies are inferred from the claim text.