金属加工（热加工）Issue(10)：67-72,6.
钢结构桁架电弧焊焊接接头腐蚀疲劳性能试验研究
Experimental study on corrosion fatigue properties of welded joints of steel structure trusses by arc welding
摘要
Abstract
In order to explain the relationship between corrosion and fatigue of welded joints in steel truss structures using arc welding,analyze the safety of the structure,and study its corrosion fatigue performance through experiments.Arc welding was used to weld steel structure truss joints.After welding,the corrosion fatigue performance of the welded joint was tested,the microscopic morphology was observed,and the influence of swing during arc welding on corrosion fatigue performance was analyzed,and the influence of corrosion on fatigue performance was studied,and the test results showed that increasing the number of fatigue cycles would reduce the fatigue performance of welded joints,and the extension of corrosion time further weakens the fatigue resistance.The immersion in corrosion solution leads to corrosion products in the joint.The corrosion products are more in low-current arc welding and less in high-current welding.The ultimate residual stress of swing arc welding is higher than that of non-swing arc welding,and the position of the ultimate residual stress is closer to the weld,the non-swing arc welding joint residual stress is lower,and its fatigue life is longer.During small cyclic loading,the crack propagation rate is higher in the air environment.With the increase of cyclic load,the rate in corrosive environment increases significantly.关键词
钢结构桁架/电弧焊/焊接接头/盐性腐蚀/疲劳性能/残余应力Key words
steel structure truss/arc welding/welding joint/salt corrosion/fatigue performance/residual stress引用本文复制引用
李强,余沛文..钢结构桁架电弧焊焊接接头腐蚀疲劳性能试验研究[J].金属加工（热加工）,2025,(10):67-72,6.基金项目
教育部产学合作协同育人项目(220604276301812). （220604276301812）
