2A14铝合金直流A-TIG焊接技术

Analysis of direct current A-TIG welding of 2A14 aluminum alloy

关键词:  直流A-TIG|2A14铝合金|活性剂|微气孔

Key words:  direct current activating TIG welding|2A14 aluminum alloy|activating flux|micro porosity

摘要:

依据某型号的铝合金焊接构件对焊后表面的高平面度要求，自主研制活性剂，实现2A14铝合金的直流A-TIG焊接. 并通过直流A-TIG焊缝的表面成形、X射线、微观组织观察及力学性能等方面开展2A14铝合金直流A-TIG焊接技术研究. 结果表明，当活性剂浓度为15%时可以获得表面成形、内部质量及力学性能良好的2A14铝合金直流A-TIG焊缝；与交流TIG焊相比，焊缝力学性能略高，微观气孔数量明显降低.

Abstract:

According to the high flatness requirement of a specific aluminum component, the direct current activating TIG welding (DC A-TIG) has been realized by using a self-developed activating flux. The appearance, internal qualities, microstructures and mechanical properties of the DC A-TIG welds have been studied. The results indicate that when the activating flux concentration is 15%, a 2A14 DC A-TIG weld with good appearance, internal quality and mechanical property can be obtained. Comparing to the alternating current TIG (AC TIG) welds, the mechanical properties of the DC A-TIG welds are a little higher and the number of the micro porosities decreases dramatically.