METHOD FOR REDUCTION WELDING RESIDUAL TENSILE STRESS BY LOCAL HEATING OF WELD ZONE

摘要

The present invention relates to a method for reducing residual tensile stress of a welding unit by a partial heating method, comprising the steps of: predicting a section in which the residual tensile stress in a welding line direction of a welding unit is generated; designating one or more sections generating compressive stress within the predicted section; heating a central part of the designated section with a heating source; and generating the compressive stress by cooling the heated section. [Reference numerals] (AA) Welding direction