采用水蒸气等离子弧技术进行了7A52铝合金薄板焊接试验,研究了坡口形式和焊接参数对接头成形的影响,确定了最佳焊接工艺参数。对焊接接头的微观组织和力学性能进行了检测分析,结果表明:宏观上接头内部无明显的气孔、夹渣和裂纹等焊接缺陷,其最大抗拉强度可达母材的50%,伸长率优于母材,能够满足野外应急维修焊接的要求。 7A52 aluminum alloy sheet welding test was carried out by water vapor plasma arc technique. The influence of groove form and welding parameters on joint forming was studied and the optimum welding parameters were determined. The microstructure and mechanical properties of the welded joints were tested and analyzed. The results showed that there was no obvious weld defects such as pores, slag inclusions and cracks in the macro joints. The maximum tensile strength could reach 50% of the base metal, and the elongation Better than the base metal, to meet the field emergency repair welding requirements.