To reduce tensile residual stress in a welded region, we developed a new welding method that applies a water-shower behind the welding torch. To verify the effects of the meth od, specimens welded with or without water shower cooling were manufactured. Residual stresses of the specimens were experimentally measured. It was found that tensile residua l stresses were generated on the surface of the welds and those were reduced in the case that the water-shower was applied. These measurement results agree wel...
英字タイトル:
Development of Residual Stress Improvement Technology for Multi-Layer Welded Joint of Austenitic Stainless Steel Using Rapid Cooling During Welding

Weld pass sequence generally affects residual stress profiles. In this study, the profiles of a multi pass bead on plate specimen were experimentally and analytically examined. Material used in this study was the low alloy steel SQV2A (JIS G 3120). Phase transformation usually occurs around welded area in SQV2A and also affects the profiles. Five pass bead on plate specimen was fabricated. Residual stress profiles of the specimen were measured by using the strain relief method. Longitudinal residual st...
英字タイトル:
Residual Stress Analysis of Multi Pass Bead on Plate Specimen of Low Alloy Steel SQV2A by Considering Phase Transformation in Welding Process