6061-T5铝合金搅拌摩擦焊接头组织和力学性能  

Microstructure and Mechanical Properties of Friction Stir Welded Joints of 6061-T5 Aluminum Alloy

作　　者：吕煜 郭国林 徐子骞[1] 王杰 王乐 吴柯寒 高安慧 LV Yu;GUO Guolin;XU Ziqian;WANG Jiea;WANG Le;WU Kehan;GAO Anhui(a.School of Automotive Engineering,Changshu Institute of Technology,Changshu 215500,China;Jiangsu Key Lab of Recycling&Reuse Technology for Mechanical and Electronic Products,Changshu Institute of Technology,Changshu 215500,China)

机构地区：[1]常熟理工学院汽车工程学院,江苏常熟215500 [2]常熟理工学院江苏省机电产品循环利用技术重点实验室,江苏常熟215500

出　　处：《常熟理工学院学报》2020年第2期66-69,共4页Journal of Changshu Institute of Technology

基　　金：江苏省大学生创新创业训练计划项目“铝合金汽车车门搅拌摩擦焊强化机理研究”(201810333059X)。

摘　　要：采用搅拌摩擦焊技术对6061-T5铝合金进行焊接,分析了焊接速度对接头成形、微观结构及力学性能的影响.结果表明:随着焊接速度的增加,沉淀相固溶度下降,晶粒细化;焊接速度过大时,热输入不足,呈现原始态组织.当转速为800 r/min,焊接速度为60 mm/min时,接头成形良好,抗拉强度达到最大值.采用合适的搅拌摩擦焊工艺参数,6061-T5铝合金能实现可靠的连接.Friction stir welding of 6061-T5 aluminum alloy was carried out to analyze the influence of welding speed on the forming,microstructure and mechanical properties of the joints.The results indicated that the solid solubility of precipitated phase decreased and that the grains were refined with increasing welding speed.The heat input was insufficient when the welding speed was too high,presenting the original structure.At a rotational speed of 800 r/min with a welding speed of 60 mm/min,the joint was well formed and the tensile strength of the joint reached a maximum.Thus,a sound joint of 6061-T5 aluminum alloy can be obtained with suitable welding parameters.

关 键 词：6061-T5铝合金 搅拌摩擦焊 焊接速度 微观组织 力学性能 

分 类 号：TG453[金属学及工艺—焊接]