东南大学学报（英文版）2025，Vol.41Issue(3)：305-313,9.DOI:10.3969/j.issn.1003-7985.2025.03.006
铸钢接头异种环焊缝复合焊接工艺残余应力的数值模拟
Numerical simulation of residual stresses in hybrid welding for dissimilar girth welds of cast steel joints
摘要
Abstract
The study aimed to address the issue of elevated residual stress levels in dissimilar girth welds of cast steel joints.To achieve this,the hybrid welding technology,which yields high welding speeds while simultaneously re-ducing residual stresses,has been introduced.This study utilizes a numerical simulation method to investigate the temperature and residual stress field in the hybrid welding of G20Mn5 casting-Q355 low-alloy steel welded pipe.A com-parison of the findings of this study with those of other weld-ing processes revealed the technological advantages of hy-brid welding.The research outcomes show that due to geo-metric discontinuities and material differences,the tempera-ture field of the joint exhibits uneven distribution characteris-tics,and the peak temperatures on the Q355 steel side ex-ceeds those on the G20Mn5 steel side.An evident stress gra-dient is present in the residual stress field of the joint post-welding,with peak stress located at the weld root on the Q355 steel.Compared with arc welding,the hybrid welding leads to decreased residual stresses and deforma-tion,with high stress outside the heat-affected zone dimin-ishing rapidly.Furthermore,it significantly improves the welding efficiency.This study elucidates the distribution and underlying causes of thermal and residual stress fields in dissimilar girth welds.This serves as a foundation for the application of hybrid welding technology in welded cast steel joints.关键词
复合焊接/铸钢/异种环焊缝/残余应力/数值模拟Key words
hybrid welding/cast steel/dissimilar girth weld/residual stress/numerical simulation分类
矿业与冶金引用本文复制引用
焦海涵,靳慧,范永春,徐璐..铸钢接头异种环焊缝复合焊接工艺残余应力的数值模拟[J].东南大学学报（英文版）,2025,41(3):305-313,9.基金项目
The SEU Innovation Capability Enhancement Plan for Doctoral Students(No.CXJH_SEU 24115),Marine Economic De-velopment Project of Guangdong Province(No.GDNRC[2022]25)). （No.CXJH_SEU 24115）
