Effect of single/double pass welded ioint performance of Q345E steel with repair welding once in bond area

单、双道焊缝熔合区的一次补焊对Q345E钢的焊接接头性能的影响 Effect of single/double pass welded ioint performance of Q345E steel with repair welding once in bond area 李昌范 LI Changfan 1 first-author 郝永魁 HAO Yongkui 1 古典 GU Dian 1 宫兆超 GONG ZHaochao 1 张永强 ZhANG Yongqiang 1 中车青岛四方车辆研究所有限公司 中车青岛四方车辆研究所有限公司 CRRC Qingdao Sifang Rolling Stock Research Institute Co.,Ltd. CRRC Qingdao Sifang Rolling Stock Research Institute Co.,Ltd. 研究Q345E钢的4 mm单道及6 mm双道焊在焊缝熔合区一次补焊对接头性能的影响,通过拉伸、硬度、弯曲等力学性能试验分析了补焊对接头力学性能的影响。分析补焊前后焊缝区的室温金相组织;分析了原焊缝区与补焊后热影响重叠区域的金相组织;分别对比了经一、二次热循环的热影响区补焊前后的室温金相组织,为进一步评价接头性能提供了理论依据。 This paper studies the repair welding once in bond area influence the welding joint of Q345E steel of 4 mm single and 6 mm double pass. Based on mechanical properties test such as tensile,hardness,bending for repair welding joint; the metallographic structure before and after repair welding was analyzed;the metallographic structureof overlapping position of the original weld zone and repaired welding HAZ was analyzed.The metallographic structure of the heat-affected zone before and after repair welding was compared with that of the heat-affected zone after the first and second heat cycles respectively. It provides theoretical basis for further evaluation of joint performance. 熔合区补焊 Q345E 单道及双道焊 力学性能 金相组织 bond area repair welding Q345E single and double pass welding mechanical properties metallographic structure TG457.11 2022-03-08 10 50