Zn夹层下的铜/铝异材FSSW工艺研究  

Study on FSSW Process of Cu/Al Dissimilar Alloys Based on Zn Interlayer

作　　者：任晓光[1] 任赵旭 寇艳军 王留芳 杨康[2] REN Xiaoguang;REN Zhaoxu;KOU Yanjun;WANG Liufang;YANG Kang(Department of Materials Engineering,Liaoning Mechatronics College,Dandong 118009,China;College of Aerospace Engineering,Shenyang Aerospace University,Shenyang 110136,China)

机构地区：[1]辽宁机电职业技术学院材料工程系,辽宁丹东118009 [2]沈阳航空航天大学航空宇航学院,辽宁沈阳110136

出　　处：《热加工工艺》2021年第15期149-153,共5页Hot Working Technology

基　　金：2020年辽宁省教育厅科技项目(IX202002);国家自然科学基金项目(51905355)。

摘　　要：为了实现铜/铝复合构件的高质量连接,采用0.02 mm厚的Zn箔作用中间夹层,在不同转速下进行T2铜(上板)和1060铝(下板)搭接的搅拌摩擦点焊试验。结果表明:搭接界面处的金属间化合物保证了上板与下板间的有效连接。界面处的金属间化合物主要由Al-Cu-Zn、Al2Cu及α-Al(Cu)共晶结构组成。匙孔下方与轴肩下方搭接界面的金属间化合物组成存在差异。当转速为1750 r/min时,接头的金属间化合物层厚度最大,拉剪载荷值也最大,为6.84 kN。接头均沿搭接界面的金属间化合物层断裂,呈现为剪切断裂模式。In order to obtain high quality connection of copper and aluminum composite components, friction stir spot welding(FSSW) experiments for lap joining between T2 copper( upper plate) and 1060 aluminum(lower plate) were performed using 0.02 mm thick Zn interlayer at different rotational speeds. The results show that the intermetallic compounds(IMCs) at the lap interface ensure the effective connection between the upper plate and the lower plate. The IMCs in the joint are mainly composed of Al-Cu-Zn, Al2Cu, and α-Al(Cu) eutectic structures. There is a difference in the IMCs composition between the lap interface under the keyhole and that under the shoulder. When the rotational speed is 1750 r/min, the thickness of the IMCs in the joint is the largest and the tensile shear load reaches the maximum of 6.84 kN. The joints all fracture along the IMCs at the lap interface, which belongs to the shear fracture mode.

关 键 词：铜/铝异材 搅拌摩擦点焊 Zn夹层 金属间化合物 

分 类 号：TG453.9[金属学及工艺—焊接]