电弧增材制造克服了传统铸锻技术制备镁合金的不足，是镁合金成形中的新技术。 然而，镁合金电弧增材 制造过程影响因素较多，工艺控制困难，且存在零件难以成形、易开裂、易产生内部缺陷等问题。为了解决镁合金电弧增 材制造工艺控制困难的问题，采用实验结合机器学习的方法建立了工艺参数与试样宏观形貌之间的非线性关系， 分析了不同工艺参数对成形质量的影响规律，确定最佳工艺参数范围为：基板温度160℃，送丝速度12.0~14.5m/min， 焊接速度8~11mm/s，摆弧宽度8~10mm。 以AZ31镁合金丝材作为原材料，针对寻优工艺参数进行了单层和多层镁合 金电弧增材制造实验。 结果表明，该参数条件下熔宽为13.95mm，熔高为3.28mm，宽高比为4.25，接触角为42°，此时 镁合金熔融丝材铺展性良好，且试样表面无不成形缺陷。

Wire-arc additive manufacturing of magnesium alloys overcomes the main shortcomings of traditional casting and forging technology, which is a new technology in the field of magnesium alloy forming. However, the process of wire-arc additive manufacturing of magnesium alloys is affected by many factors, making it difficult to control the forming process. In addition, defects, such as hot cracking and pore defects, are prone to occur during the forming process. To solve this problem, a nonlinear relationship between the process parameters and the macroscopic morphology of the samples was established by combining experimental and machine learning methods. Furthermore, the influence of different process parameters on the forming quality was analysed, and the optimal ranges of process parameters were determined, i.e., 160 ℃ (substrate temperature), 12~14.5 m/min (wire feeding speed), 8~11 mm/s (travel speed), and 8~10 mm (weaving width). Finally, using AZ31 magnesium alloy wire as the experimental raw material, single-layer and multilayer magnesium alloy arc additive manufacturing experiments were conducted with the optimized process parameters. The experimental results reveal that the samples form well when the melt width is 13.95 mm, the melt height is 3.28 mm, the aspect ratio is 4.25, and the contact angle is 42°.