Repair method for structure and repair welding apparatus
AssigneeKabushiki Kaisha Toshiba
InventorsMasataka Tamura, Yoshinobu Makino, Wataru Kono, Seiichiro Kimura, Nobuichi Suezono, Hidenori Takahashi
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Abstract
A repair method for a structure having an open flaw in a welding heat affected portion, including, removing at least a part of the open flaw and thereby forming a concave portion in the welding heat affected portion, forming build-up weld layers so as to fill the concave portion, treating a surface of the build-up layers to reduce tensile residual stress by means of at least one of laser peening, shot blasting and water jet machining. Also disclosed is an apparatus suitable for carrying out the repair method.
Claims15
A repair method for a structure having an open flaw in a welding heat-affected portion, comprising:
- removing at least a part of the open flaw and thereby forming a concave portion in the welding heat affected portion;
- forming build-up weld layers so as to fill the concave portion;
- and
- treating a surface of the build-up weld layers to reduce tensile residual stress by means of at least one of laser peening, shot blasting and water jet machining.
A repair method for a structure having an open flaw in a welding heat-affected portion, comprising:
- cleaning a surface of the welding heat-affected portion,
- forming build-up weld layers on a region including the open flaw to seal the open flaw therewith;
- and
- treating a surface of the build-up weld layers to reduce tensile residual stress by means of at least one of laser peening, shot blasting and water jet machining.
Dependencies are inferred from the claim text.