邓怀波, 陈玉华, 于洋洋, 欧阳正隆, 胡文硕. 薄片状Ta/Mo激光微焊接工艺研究[J]. 南昌航空大学学报(自然科学版), 2016, 30(3): 86-90. DOI: 10.3969/j.issn.1001-4926.2016.03.016
引用本文: 邓怀波, 陈玉华, 于洋洋, 欧阳正隆, 胡文硕. 薄片状Ta/Mo激光微焊接工艺研究[J]. 南昌航空大学学报(自然科学版), 2016, 30(3): 86-90. DOI: 10.3969/j.issn.1001-4926.2016.03.016
DENG Huai-bo, CHEN Yu-hua, YU Yang-yang, OU YANG Zheng-long, HU Wen-shuo. Study on Micro-laser Welding Process of Ta Sheet and Mo Sheet[J]. Journal of nanchang hangkong university(Natural science edition), 2016, 30(3): 86-90. DOI: 10.3969/j.issn.1001-4926.2016.03.016
Citation: DENG Huai-bo, CHEN Yu-hua, YU Yang-yang, OU YANG Zheng-long, HU Wen-shuo. Study on Micro-laser Welding Process of Ta Sheet and Mo Sheet[J]. Journal of nanchang hangkong university(Natural science edition), 2016, 30(3): 86-90. DOI: 10.3969/j.issn.1001-4926.2016.03.016

薄片状Ta/Mo激光微焊接工艺研究

Study on Micro-laser Welding Process of Ta Sheet and Mo Sheet

  • 摘要: 采用低功率脉冲激光作为热源,以TC4合金丝作为填充材料,实现了0.2 mm厚的薄片状Ta/Mo异种材料的良好焊接。通过正交试验对工艺参数进行了优化,并研究了工艺参数对焊接接头横截面形貌和力学性能的影响。结果表明:当激光功率为20.8 W、脉冲宽度为3 ms、激光频率为6 Hz时,焊接接头的抗拉强度大于母材Ta;母材Ta与焊缝之间界面区的宽度较小,表现为界面线,界面线上生长着一层柱状晶;Mo母材侧的界面区宽度约为10 μm,界面区内的晶粒以胞状晶方式生长。

     

    Abstract: Dissimilar material between Ta and Mo sheetl of 0.2 mm thickness were butt welded by micro impulse laser, and TC4 alloy wire as filler material. The progress parameters were optimized by orthogonal experiment, and influence of processing parameter on cross-section morphology and mechanical properties of welded joint was studied. The result shows that when the pulse power for 20.8 W, pulse width for 3 ms, pulse frequency for 6 Hz, the tensile strength of the welded joint is greater than the Ta base metal. The width of the interfacial zone between Ta base metal and the weld is small and the interface is a line, on the line interface growthing with a layer of columnar crystal. There is an obvious interfacial zone of about 10 μm width between Mo base metal and the weld, the grain of fused area are grown in a cellular crystal manner.

     

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