Microstructure and Properties of an Al 6061/Galvanized Plate Fabricated by CMT Welding

• 作 者: ZHANG Qi ZHANG Peilei YU Zhishui YAN Hua SHI Haichuan WU Di LI Shaowei TIAN Yingtao
• 机 构: School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
• 出 处: 武汉理工大学学报（材料科学版）（英文版）
• 发表日期: 2020年5期
• 关键词: cold metal transfer microstructure microhardness dissimilar metals

Aluminum alloy 6061 was welded with zinc coated low carbon steel by cold metal transfer (CMT). The microstructure composition, morphology and growth process of the welding joint and the HAZ were researched. The weld area on the side of the galvanized steel sheet mainly contains Fe2Al5. And on the side of the aluminum alloy substrate, it is mainly filled with a needle-like FeAl3. At the same time, Al8Fe2Si is formed at the edge of FeAl3. The zinc-rich region on the side of the aluminum alloy mainly contains an aluminum-zinc solid solution and an aluminum-zinc co-crystal, and the current size had no significant effect on the type and morphology of the compounds produced in the interface layer.