焊管2025，Vol.48Issue(4)：47-53,7.DOI:10.19291/j.cnki.1001-3938.2025.04.007
300M超高强钢电弧焊修复试验研究
Study on Arc Welding Repair of 300M Ultra-high Strength Steel
摘要
Abstract
In response to its demand for high-quality welding and rapid repair of 300M ultra-high strength steel,four types of welding wires,namely homogeneous,H18CrMoA,ER80S-B2,and ER120S-G,were designed and utilized to conduct TIG welding repair experiments on 300M steel bars.A finite element calculation model for 300M steel bar repaired by arc welding,simulating preheating,slow cooling,constraint conditions and other working conditions,was developed.By matching the mesh size with the welding speed,the distribution characteristics of the residual stress field after repair using the four types of welding wires were calculated.The differences in residual stress and mechanical properties after repair were analyzed.The results indicated that the residual stress of 300M steel welded joint repaired using homogenous welding wire was the lowest among the options.Additionally,the mechanical properties of the joint were uniform and closely approximate those of the base metal.In comparison,the welded joint repaired with H18CrMoA welding wire exhibited slightly inferior performance but remained a viable alternative for repair applications.关键词
300M钢/弧焊修复/残余应力/综合性能Key words
300M steel/arc welding repair/residual stress/comprehensive performance分类
金属材料引用本文复制引用
路浩,巩照坤,邢立伟,强伟..300M超高强钢电弧焊修复试验研究[J].焊管,2025,48(4):47-53,7.基金项目
陕西省自然科学基础研究计划项目"基于小倾角辅丝填充GMA-AM的铝基FGM制备及服役性能调控"(项目编号2024JC-YBMS-360). （项目编号2024JC-YBMS-360）
