Effect of CMT process on weldability and microstructures of joint between 5052 aluminum alloy and galvanized steel
Aim to application for automobile industry, cold metal transfer (CMT) welding process was conducted to produce joint between dissimilar materials of 1mm thick aluminum alloy and galvanized steel thin sheet. The effects of the CMT process on weldability and microstructures of the CMT joint were investigated by means of optical microscopy (OM) and scanning electron microscopy (SEM) coupled with energy dispersive spectrometer (EDS). The results show that a good lap joint can be formed between aluminum alloy and galvanized steel by suitable parameters. The joint is mainly divided into melting zone, interfacial /one and zinc-rich zone. Melting zone consist of a-Al and β (Mg5Al8). Interfacial zone is about 2 to 7um in thickness composed of FeAl, and Fe2Al5 intermetallics with microhardness of 360HV. Zinc-rich zone is mainly constituted of αAl solid solution and Al-Zn eutectoid.
galvanized steel cold metal transfer(CMT) melting-brazing interfacial zone
Sheng Lu Qing-qing Cui Dai-li Yang Jing Chen
School of Materials Science and Engineering Jiangsu University of Science and Technology Zhenjiang, School of Mechanical Engineering Jiangsu University of Science and Technology Zhenjiang, China
国际会议
三峡
英文
686-689
2012-05-18（万方平台首次上网日期，不代表论文的发表时间）