汽车用薄板多层铝合金激光焊接头组织与性能研究  

Study on Microstructure and Properties of Multilayer Aluminum Alloy Laser Welding Joints for Automobile

作　　者：金鑫 唐强 田春雨 秦瑶 叶树茂 吴琪 Jin Xin;Tang Qiang;Tian Chunyu;Qin Yao;Ye Shumao;Wu Qi(Liaoning Zhongwang Group Co.,Ltd.,Liaoyang 111000,China)

机构地区：[1]辽宁忠旺集团有限公司,辽宁辽阳111000

出　　处：《有色金属加工》2024年第3期32-35,40,共5页Nonferrous Metals Processing

摘　　要：文章主要以铝合金车身用多层薄板叠焊接头为研究对象,采用1 mm厚5052-H32铝合金作为母材,采用激光自熔焊和激光填丝焊分别进行两层及三层薄板叠焊,对两种焊接方法叠焊接头的焊接试验件焊缝表面形貌、金相显微组织及性能进行对比分析。结果表明,两种焊接方法的叠焊接头表面成型良好,鱼鳞纹明显;激光填丝焊两层及三层薄板叠焊接头强度均高于激光自熔焊10 MPa左右,硬度性能优于单激光焊;激光自熔和激光填丝焊接头处晶粒组织基本一致,激光填丝焊焊缝区强化相数量较多,等轴枝晶更加细化。In this paper,the multi-layer laminated welding joint of aluminum alloy body is mainly studied.5052-H32 aluminum alloy with thickness of 1mm is used as the base material to perform two-layer and three-layer thin sheet welding by laser self-fusion welding and laser wire filling welding,respectively.The weld surface morphology,metallographic microstructure and properties of the welding test pieces of the two welding methods are compared.The results show that the surface of the two welding methods is well formed and the fish scale is obvious.The strength of two and three layers of laminated laser wire welding is about 10 MPa higher than that of laser self-fusion welding,and the hardness is better than that of single laser welding.The grain structure of laser self-melting and laser wire filling welding joints is basically the same.The number of reinforcement phase in weld zone of laser wire filling welding is more,and the equiaxed dendrites are more refined.

关 键 词：多层叠焊 5052-H32铝合金 激光焊 组织性能 

分 类 号：TG457.14[金属学及工艺—焊接]