杨晨,余陈,郭春富,王海燕,郝晓曦,邝幸胜

• 1:五邑大学机械与自动化工程学院
• 2:广东省科学院中乌焊接研究所
• 3:广东省材料连接与先进制造重点实验室

摘要(Abstract)：

采用3种熔化极气体保护焊(GMAW)焊接工艺：冷金属过渡焊(CMT)、熔化极惰性气体保护焊(MIG)和脉冲熔化极惰性气体保护焊(P-MIG),对6061-T6铝合金进行焊接试验，研究了3种焊接工艺下的焊缝成形及接头组织性能。结果表明：3种工艺均能获得成形良好的接头；对焊缝横截面气孔进行统计，发现CMT焊与MIG焊气孔率相差不大，而P-MIG焊气孔率约为CMT焊的2.6倍；相较于MIG焊与P-MIG焊，CMT焊缝组织更为细小；3种工艺下接头硬度分布水平相差不大，接头拉伸试样断裂位置在热影响区，断裂形式属于延性断裂；其中CMT焊接接头的抗拉强度最高，为199.20 MPa,达到母材的69.8%,断后伸长率为11.01%。

关键词(KeyWords)： 6061-T6铝合金;焊缝成形;微观组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 广东省科学院发展专项资金项目资助(2020GDASYL-20200301001);; 环保在线检测仪器研发项目(2022AL004);; 高效节能进水阀的研发与升级(2320002000601);; 广东省普通高校重点领域专项(2021ZDZX1045)

作者(Author): 杨晨,余陈,郭春富,王海燕,郝晓曦,邝幸胜

DOI: 10.13289/j.issn.1009-6264.2024-0291

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