2A14铝合金光纤激光填丝焊热裂纹敏感性研究

发布时间：2018-10-18 17:16

【摘要】：采用鱼骨状裂纹试验方法,研究了2A14铝合金光纤激光填丝焊接热裂纹敏感性,观察并分析了裂纹断口的形貌特征,为防止2A14铝合金光纤激光填丝焊接中热裂纹的产生提供了理论依据。研究结果表明,在2A14铝合金光纤激光填丝焊接中的热裂纹为结晶裂纹。在不同焊接速度时,热裂纹的产生均存在一个明显的激光功率阈值。激光功率低于阈值时,热裂纹倾向明显;激光功率达到或高于阈值时,热裂纹倾向得到抑制,基本不产生热裂纹。
[Abstract]:The sensitivity of 2A14 aluminum alloy fiber laser filled wire welding to hot crack was studied by using fishbone crack test method. The morphology of crack fracture was observed and analyzed. It provides a theoretical basis for preventing hot cracks in 2A14 aluminum alloy fiber laser filamentary welding. The results show that the hot crack in 2A14 aluminum alloy fiber laser filled wire welding is crystalline crack. At different welding speeds, there is an obvious laser power threshold for the generation of hot cracks. When the laser power is lower than the threshold, the hot crack tendency is obvious, and when the laser power reaches or exceeds the threshold, the hot crack tendency is restrained, and the thermal crack is not produced.
【作者单位】：上海交通大学上海市激光制造与材料改性重点实验室;上海航天精密机械研究所;
【基金】：上海交大航天先进技术联合研究中心项目(USCAST2012-18)
【分类号】：TG456.7

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