钛合金曲面焊缝TIG焊接工艺研究

Study on TIG Welding Process of Titanium Alloy Curved Surface Weld

针对某钛合金曲面焊缝结构提出的高难度TIG焊接难题,分别开展了精确分区间、不同脉宽比、增设叠加脉冲电流等的对比焊接试验。采用尺寸检验、外观检验、金相检验等手段对曲面焊缝性能进行检验,最终确定了TIG焊接工艺。焊缝成形和熔合线长度均满足要求。该研究结果对高技术要求曲面焊接及其他特殊结构焊缝的焊接工艺研发具有重要的参考意义。

Aiming at the high-degree difficult TIG welding problem of a titanium alloy curved surface weld, a series of contrast experiments under accurate intervals, different duty cycles and addition of superimposed pulse current were carried out. The performance of the curved surface welds was tested by using dimensional inspection, visual inspection and metallographic examination, the TIG welding technology was finally detemined, and the weld appearance and the length of weld fusion line meet the requirements. The result has good reference for welding technology research of curved surface weld with high technical requirement and other special welds.