With the acceleration of industrial process, the requirement of welding quality becomes higher, especially the residual stress. For vertical welded joints, a weld model is constructed in this paper, which includes four layers on the inside and outside. Eight different welding sequences are arranged and combined. Based on the finite element method of thermo-mechanical coupling, the variation rules of residual stress in vertical and horizontal directions are calculated. The results show that the maximum residual stress in the weld is distributed in the superheated zone, not in the weld zone. In addition, the mechanism of stress change and the method of improving welding quality are analyzed.
Paper No:
2484
