固溶时效对2219-T6铝合金MIG焊接接头组织与性能的影响  

Effect of solution and aging on microstructure and properties of2219⁃T6 aluminum alloy MIG welded joint

作　　者：陈岩 丛福官[1] 李国栋 于峰 谢登宇 胡天龙 谭艺哲 左德运[1] 任思蒙 CHEN Yan;CONG Fuguan;LI Guodong;YU Feng;XIE Dengyu;HU Tianlong;TAN Yizhe;ZUO Deyun;REN Simeng(Northeast Light Alloy Co.,Ltd.,Harbin 150060,China;China Aerospace Science and Industry Corporation Materials Supply Station,Beijing 100830,China;Application Center of Chinalco Materials Application Research Institute Co.,Ltd.,Beijing 102200,China;Key Laboratory of Superlight Materials&Surface Technology Ministry of Education,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]东北轻合金有限责任公司,黑龙江哈尔滨150060 [2]中国航天科工集团物资供销总站,北京100830 [3]中铝材料应用研究院有限公司应用中心,北京102200 [4]哈尔滨工程大学超轻材料与表面技术教育部重点实验室,黑龙江哈尔滨150001

出　　处：《轻合金加工技术》2024年第9期62-67,共6页Light Alloy Fabrication Technology

摘　　要：采用MIG焊(熔化极气体保护焊)对2219T6铝合金板材进行焊接试验,并分别对焊接态和热处理态2219铝合金接头组织和性能进行分析。结果表明,焊接态接头的力学性能远低于母材的,接头的抗拉强度、屈服强度和伸长率分别为257 MPa、150 MPa和5%,焊接系数仅为0.58。经过固溶时效处理的接头组织发生明显变化,晶粒粗化、网状共晶组织消失,但同时焊缝区析出高密度弥散、针状分布的θ″-Al2Cu相,提升了接头性能,接头抗拉强度、屈服强度和伸长率分别为439 MPa、325 MPa和11%,焊接系数提升了0.42。The welding test of 2219T6 aluminum alloy was carried out by MIG welding,and the microstructure and properties of welded and heat-treated joints were analyzed respec-tively.The results show that the mechanical properties of the welded joint are much lower than those of the base material,the tensile strength,yield strength and elongation of the joint are 257 MPa,150 MPa and 5%,respectively,and the welding coefficient is only 0.58.Af-ter solution aging treatment,the joint structure changes obviously,the grain coarsens and the network eutectic structure disappears,while at the same time,the high-density dispersed and acicular e"-Al,Cu phase precipitates in the weld zone,improving the joint performance.The tensile strength,yield strength and elongation of the joint are 439 MPa,325 MPa and 11%,respectively,and the welding coefficient increases by 0.42.

关 键 词：2319铝合金 MIG焊 焊接接头 微观组织 力学性能 

分 类 号：TG146[一般工业技术—材料科学与工程] TG21[金属学及工艺—金属材料]