The Change of Residual Stress with Two-wire Spacing of Twin-wire Submerged Arc Welding

摘要

Finite element software MSC.MARC was used to analyze the residual stress of high-strength low-alloy steel suffered twin-wire SAW.The numerical simulation of the residual stress field with different twin-wire spacing was conducted.The residual stress test results under twin-wire SAW at twin-wire of 50 mm welding were compared to the simulation results,which verified the numerical simulation.The results showed that in the single-channel and twin-wire welding,the largest welding residual stress of the joints is located near the weld toe.At certain wire distances (20-100 mm) in the twin-wire welding process,increasing distance only minimally reduces welding residual stress.Thus,the effects of residual stress on two-wire spacing have been neglected in studies on the twin-wire welding process,More studies should focus on the impact of the performance and forming of the weld joint.