焊层排布对5083/6005A铝合金熔化极气体保护焊接接头显微组织及力学性能的影响  

Effects of welding layer arrangement on microstructure and mechanical properties of gas metal arc welded 5083/6005A aluminium alloy butt joints

作　　者：吴来军 韩晓辉 马国龙 杨彪[1,2] 卞红 宋晓国 檀财旺[1,2] Lai-jun WU;Xiao-hui HAN;Guo-long MA;Biao YANG;Hong BIAN;Xiao-guo SONG;Cai-wang TAN(State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,Harbin 150001,China;Shandong Provincial Key Laboratory of Special Welding Technology,Harbin Institute of Technology at Weihai,Weihai 264209,China;CRRC Qingdao Sifang Co.,Ltd.,Qingdao 266111,China)

机构地区：[1]哈尔滨工业大学先进焊接与连接国家重点实验室,哈尔滨150001 [2]哈尔滨工业大学(威海)山东省特种焊接技术重点实验室,威海264209 [3]中车青岛四方机车车辆股份有限公司,青岛266111

出　　处：《Transactions of Nonferrous Metals Society of China》2023年第6期1665-1676,共12页中国有色金属学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.52005132);the Key Research and Development Program of Shandong Province,China(No.2021ZLGX01);the Natural Science Foundation of Shandong Province,China(No.ZR2019PEE038);the Heilongjiang Touyan Team for the funding support。

摘　　要：研究焊层排布方式对5083/6005A铝合金熔化极气体保护焊接(GMAW)接头显微组织及力学性能的影响。采用两层两道、两层三道和三层三道3种焊层排布方式获得高质量的对接接头。结果表明,位于6005A铝合金侧热影响区的软化区是5083/6005A铝合金GMAW接头的最薄弱部位。两层两道接头的热影响区再结晶程度和沉淀相溶解程度最高,而三层三道接头的最低。随着焊接层数和道次的增加,部分熔化区的晶界液化程度以及软化区的强度损失得到改善。两层两道接头的抗拉强度为161 MPa,而三层三道接头的抗拉强度提高到217 MPa。The effects of welding layer arrangement on the microstructure and mechanical properties of 5083/6005A aluminium alloy gas metal arc welded(GMAW)joints were studied.High-quality butt joints were obtained under different welding layer arrangements,including two layers and two passes,two layers and three passes,and three layers and three passes.The results indicated that the softening zone located in the heat-affected zone(HAZ)of the 6005A aluminium alloy side was the weakest part of the 5083/6005A alloy joints.The highest level of recrystallization and precipitate dissolution was observed in the HAZ of the two-layer and two-pass joints;however,the lowest level was verified in the three-layer and three-pass joints.With the increase in the number of welding layers and passes,grain boundary liquation in the partially melted zone(PMZ)and strength loss of the softened zone were improved.The tensile strength of the two-layer and two-pass joints was 161 MPa,while that of the three-layer and three-pass joints increased to 217 MPa.

关 键 词：铝合金 熔化极气体保护焊 焊接层道排布 显微组织 力学性能 

分 类 号：TG444.74[金属学及工艺—焊接]