电焊机2026，Vol.56Issue(5)：15-24,10.DOI:10.7512/j.issn.1001-2303.2026.05.02
X形坡口几何参数对800MPa级船用高强钢MIG焊后变形和残余应力的影响研究
Study on the Effects of X-Groove Geometric Parameters on Post-Welding Deformation and Residual Stress of 800MPa Grade Marine High-Strength Steel in MIG Welding
摘要
Abstract
The influence laws of X-groove geometric parameters on the welding deformation and residual stress of 800MPa grade marine high-strength steel butt joints were clarified.Groove angle(50°,60°,70°),root gap(0 mm,3 mm,6 mm)and root face size(0 mm,2 mm,4 mm)were selected as the influencing factors,and a study was carried out via the method of or-thogonal experiment combined with numerical simulation.A test platform for measuring the angular deformation of butt plates was established.The response laws of angular deformation values of the first and second welding surfaces of butt plates were obtained,and the formation mechanism of the final angular deformation values was revealed.The back chipping process was simulated by the element birth and death method.Combined with the X-ray diffraction method,the distribution characteristics and evaluation indicators of residual stress of the plates were obtained.The results showed that obvious differ-ences existed in the responses of angular deformation increments of the first and second welding surfaces to groove geomet-ric parameters,and the sum of the two increments determined the response law of the final angular deformation.The root gap exerted the most significant influence on the final angular deformation,which first increased and then decreased with the increase of root gap.The longitudinal residual stress was most affected by the root face size,increasing significantly with the increase of root face size.The response of transverse residual stress to groove geometric parameters was basically consis-tent with that of angular deformation.The research results provided theoretical support and technical guidance for the weld-ing process optimization and engineering application of X-groove in 800MPa grade marine high-strength steel.关键词
船用高强钢/X形坡口几何参数/有限元仿真/焊接变形/残余应力Key words
marine high-strength steel/geometric parameters of X-groove/finite element simulation/welding deformation/residual stress分类
矿业与冶金引用本文复制引用
邵星萌,孔红雨,宫旭辉,王杏华,王青云,王景杰..X形坡口几何参数对800MPa级船用高强钢MIG焊后变形和残余应力的影响研究[J].电焊机,2026,56(5):15-24,10.基金项目
河南省科学技术协会卓越工程师基金项目(20260EFP003) （20260EFP003）
