作者:齐欣,戴鸿滨
Authors:QI Xin,DAI Hongbin摘要:摘要:为了研究5A06铝合金变动送气TIG焊焊缝微观组织与力学性能，采用（Ar-Ar）变动送气TIG焊和传统连续送气TIG焊接方法对4mm厚的5A06铝合金板进行表面堆焊，观察比较传统送气和变动送气下焊缝的表面，对焊缝金相组织进行观察，并且对1Hz变动送气下的5A06铝合金对焊板试样进行抗拉强度测试。结果表明：变动送气对熔池具有搅拌和冲击作用，熔深比传统送气下的明显增大了，相比于传统送气下的焊缝组织，变动送气下的焊缝组织中析出较多的强化相，而且强化相分布弥散均匀，增加了焊缝的强度，从而提高了焊缝质量。相对于母材，变动送气下的5A06铝合金对焊板试样的塑性下降，为母材抗拉强度的95%，断裂位置在焊缝处，断裂形式属于韧性断裂。
Abstract:Abstract:In order to study the microstructure and mechanical properties of 5A06 aluminum alloy with variable gas TIG welding, (Ar-Ar) variable gas TIG welding and traditional continuous gas TIG welding were used to carry out surface surfacing welding on 4mm thick 5A06 aluminum alloy plate. We observe the metallographic structure of the weld on the surface of the weld under air and variable air, and test the tensile strength of the 5A06 aluminum alloy butt-welded plate sample under 1Hz variable air.The results show that: the variable aeration has a stirring and impacting effect on the molten pool, and the penetration depth is significantly greater than that under the traditional aeration.Compared with the weld structure under the traditional aeration, the weld structure under the variable aeration has more precipitation phase, and the distribution of the strengthening phase is evenly dispersed, which increases the strength of the weld, thereby improving the quality of the weld. Compared with the base material, the plasticity of the 5A06 aluminum alloy butt-welded plate sample under variable aeration decreases, which is 95% of the base material′s tensile strength.The fracture location is at the weld, and the fracture form is ductile fracture.
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5A06铝合金变动送气TIG焊焊缝组织与力学性能
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