304不锈钢激光-MAG复合焊熔滴过渡及拉伸性能研究  

Study on Droplet Transition and Tensile Properties of Laser-MAG Hybrid Welding 304 Stainless Steel

作　　者：杨策 陈辉[1] 赵旭[1] 裴利程 郑森木 YANG Ce;CHEN Hui;ZHAO Xu;PEI Licheng;ZHENG Senmu(School of Materials Science and Engineering,Southwest Jiaotong University,Chengdu 610031,China;China Aerospace Science and Technology Corporation Changzheng Equipment Manufacturing Co.Ltd.,Chengdu 610100,China)

机构地区：[1]西南交通大学材料科学与工程学院,四川成都610031 [2]四川航天长征装备制造有限公司,四川成都610100

出　　处：《热加工工艺》2023年第21期20-25,31,共7页Hot Working Technology

基　　金：省级重点研发计划项目(2020YFG0196)。

摘　　要：采用激光-MAG复合焊接方法对304不锈钢进行对接试验。在确保全熔透条件下,研究了低速焊、高速焊的熔滴过渡以及焊接接头形貌、组织和拉伸性能。结果表明,低速焊时,熔滴过渡模式为短路过渡和大滴过渡;而高速焊时,熔滴过渡模式为射滴过渡和射流过渡。焊接速度对接头组织影响不大,但在拉伸性能方面,由于高速焊的焊接热输入减小,接头抗拉强度和伸长率比低速焊的明显提高。The butt joining of 304 stainless steel was carried out by using laser-MAG hybrid welding.The droplet transition during low speed welding and high speed welding and the morphology,microstructure and mechanical properties of the welded joints were studied.The results show that the droplet transition modes are short circuit transition and large droplet transition under low speed welding conditions.Under the condition of high speed welding,the droplet transition modes are drip transition and jet transition.The welding speed has little effect on the microstructure of the joint.In terms of tensile properties,the strength and elongation of the joint under high speed welding are significantly improved compared with that under low speed welding because of the decrease of welding heat input.

关 键 词：激光-MAG复合焊 304不锈钢 高速焊 熔滴过渡 拉伸性能 

分 类 号：TG456.7[金属学及工艺—焊接]