We survey various state-of-the-art methods for welding magnesium alloys and steels using different joint configurations. Microstructural characterizations indicate that four microstructures may form at the Mg/steel interface after welding: unwelded gap, metal oxides, solid solutions, or intermetallic compounds. Reaction products at the Mg/steel interface vary with different welding methods, alloying elements in base materials, interlayers or coatings applied, and preparations of base material before welding. Mechanical property characterizations, (a) lap tensile shear testing for lap-welded and spot-welded joints, (b) tensile testing for butt-welded joints and (c) fatigue properties of lap-welded and spot-welded joints are summarized and compared, separately. Reaction products at the Mg/steel interface are correlated with mechanical properties. Finally, ways to enhance Mg/steel joint strength, such as introducing interlocking features during friction stir lap and butt welding, are discussed.

我们调查了使用不同接头结构焊接镁合金和钢的各种最新方法。显微组织表征表明，在焊接后，Mg /钢界面可能会形成四个显微组织：未焊缝，金属氧化物，固溶体或金属间化合物。Mg /钢界面处的反应产物随焊接方法，基材中的合金元素，所施加的中间层或涂层以及焊接前基材的制备而变化。力学性能表征，总结并比较了（a）搭焊和点焊接头的搭接拉伸剪切试验，（b）对焊接头的拉力测试，以及（c）搭焊和点焊接头的疲劳性能，分别。镁/钢界面的反应产物与机械性能相关。