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首页> 外文期刊>Journal oflaser Applications >Nd:YAG laser welding of titanium alloys using a directed gas jet
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Nd:YAG laser welding of titanium alloys using a directed gas jet

机译：Nd：YAG定向气体喷射激光焊接钛合金

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摘要

The increasing utilization of titanium alloys in the aerospace industry, a direct result of socioeconomic pressures, has created the need for a production process which can produce high quality near-net-shape titanium alloy components. Keyhole laser welding is a joining technology which could be utilized for this requirement. In general, when laser welding titanium alloys, a jet of inert gas, directed at the region of the laser beam/material interaction point is utilized to achieve the weld quality required. A statistical study has been performed in order to determine the optimum position and flow rate of this directed gas jet, with respect to reducing the weld metal porosity and optimizing the weld profile, for autogeneous Nd:YAG laser welding of 3.25 mm thickness Ti-2.5Cu and Ti-6Al-4V. As a result, butt welds have been reproducibly made with a quality that exceeds the most stringent aerospace weld quality criteria. High speed imaging and spectroscopic analysis of the welding process have revealed that, when correctly set-up, the directed inert gas jet disperses the formation of excited metal vapor above the keyhole and also significantly changes the hydrodynamic behavior of the weld pool.
机译：钛合金在航空航天工业中的日益增加的使用，是社会经济压力的直接结果，因此需要一种能够生产高质量近净形钛合金部件的生产工艺。锁孔激光焊接是一种可以用于此要求的连接技术。通常，当激光焊接钛合金时，利用指向激光束/材料相互作用点区域的惰性气体射流来达到所需的焊接质量。为了确定厚度为3.25 mm的Ti-2.5的Nd：YAG激光自焊接，为了确定这种定向气体射流的最佳位置和流速，从而进行了统计研究，以降低焊接金属的孔隙率并优化焊接轮廓。铜和Ti-6Al-4V。结果，可重复制造的对接焊缝的质量超过了最严格的航空航天焊接质量标准。高速成像和焊接过程的光谱分析表明，如果设置正确，定向的惰性气体射流会分散小孔上方激发的金属蒸气的形成，并显着改变焊池的流体力学行为。

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  • 来源
    《Journal oflaser Applications》 |2010年第2期|P.71-78|共8页
  • 作者

    Jonathan Blackburn; rnChris Allen; rnPaul Hilton; rnLin Li;

  • 作者单位

    Laser Processing Research Centre, The University of Manchester, Manchester M60 1QD, United Kingdom;

    rnTWI Ltd., Granta Park, Abington, Cambridge CB21 6AL, United Kingdom;

    rnTWI Ltd., Granta Park, Abington, Cambridge CB21 6AL, United Kingdom;

    rnLaser Processing Research Centre, The University of Manchester, Manchester M60 1QD, United Kingdom;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    laser; weld; titanium; Nd:YAG; porosity; aerospace;

    机译：激光;焊接;钛;Nd：YAG;孔隙率航天;

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