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Droplet transfer and weld formation of MIG welding with Ar-He alternating gas for aluminum alloy

机译：铝合金Ar-He交替气体对MIG焊的熔滴传递与焊缝形成

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摘要

Alternately supplying shielding gas of Ar and He was used in MIG welding of 5A06 aluminum alloy. Arc electrical properties and droplet transfers under different flow rate ratio and flow time ratio were investigated. The welding current fluctuated as the shielding gas was alternately supplied. The droplet transfer mode was alternating, and when the Ar was supplied, the transfer mode was globular, while it was short-circuiting when the He was supplied. As the flow rate or flow time of He increased, the short-circuiting transfer counts increased. The weld penetration profiles were observed, and both the droplet transfer mode and the arc heat transfer characteristics affected it, which led to its non-monotonic change.
机译：交替供应Ar和He的保护气用于5A06铝合金的MIG焊接。研究了不同流量比和流量时间比下的电弧电性能和熔滴转移。交替供给保护气体，焊接电流发生变动。液滴的传递模式是交替的，供给Ar时，传递模式为球状，供给He时发生短路。随着He流量或时间的增加，短路转移次数增加。观察到焊缝熔深分布，熔滴传递方式和电弧传热特性均对其影响，从而导致其非单调变化。

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  • 来源
    《Journal of Manufacturing Processes》 |2020年第1期|94-101|共8页
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  • 作者单位

    Harbin Inst Technol State Key Lab Adv Welding & Joining Harbin 150001 Peoples R China;

    Harbin Univ Sci & Technol Sch Mat Sci & Engn Harbin 150040 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Alternating supply gas; Helium; Penetration depth;

    机译：交替供气;氦;穿透深度;

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