熔接残留応力に関する研究(第 4 報) : 局部加熱による残留應力の除去

概要

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The welding residual stresses in both directions, paralleleto and perpendicular to the welded edge, were measured by the X-ray diffraction method at six points over the surface of mild steel rectangular plates, which had a weld bead placed along one edge, as shown in Fig. 1. As it was found that the longitudinal stresses in the zone from the point 3 to 5 were in compression, the zone was heated to 110° to 370℃. Progressively from one end to another by a gas flame. The changes in residual stresses due to the local heating are shown in Fig. 3 to Fig. 15. The stress near the weld was reduced to a small value, but the one around the heated zone turned to be in large tension. This fact seems to be due to improperly slow heating and cooling, and a more appropriate measure will be introduced in the next report together with the clarification of the mechanism for the relieving of welding residual stress by local heating.
社団法人溶接学会の論文
1953-09-01