金属加工（热加工）Issue(3)：61-69,76,10.
焊丝类型对A514/Q355ME异种钢焊接接头组织与性能的影响
Effect of welding wire type on the microstructure and properties of A514/Q355ME dissimilar steel welded joints
摘要
Abstract
This study focuses on dissimilar steel welded joints of A514/Q355ME,using flux-cored wire and solid wire for welding experiments.A systematic comparison was conducted on the micro structure and mechanical properties of the welded joints produced by the two types of welding wires.The results show that under the same welding process,there are significant differences in the morphological features and grain size of the joints welded with different wires.Crack resistance tests using oblique Y-groove butt weld crack test indicate that both joints exhibit comparable crack resistance,meeting the application requirements.The joint welded with flux-cored wire shows slightly higher yield strength and tensile strength compared to the solid wire joint,while their elongation is similar.In impact tests at-40℃,the impact energy at the weld of the solid wire joint reaches 172J,which is significantly higher than the 68J of the flux-cored wire joint.The fatigue limit of the solid wire joint reaches 390MPa,exceeding the 370MPa of the flux-cored wire joint.Overall,both types of joints meet engineering application requirements,and the appropriate welding material should be selected according to specific service conditions.关键词
焊丝选取/焊接接头/疲劳断裂/冲击性能Key words
welding wire selection/welded joint/fatigue fracture/impact properties引用本文复制引用
张晓刚,岑轶峰,宋博文,武定泸,闫志峰..焊丝类型对A514/Q355ME异种钢焊接接头组织与性能的影响[J].金属加工（热加工）,2026,(3):61-69,76,10.基金项目
山西省基础研究计划项目(202203021221040). （202203021221040）
