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Droplet Transfer Behavior of Flux Cored Wire TIG Welding

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Abstract

This paper puts forward a new method to achieve flux cored wire TIG welding and uses high-speed photography to analyze the droplet transfer behavior and forces acting on the droplet. The droplet transfer forms include bridging transfer, slag column guided transfer, and non-contact transfer; each of these forms may be observed as the melting position of the welding wire changes. The important role of surface tension in the process of droplet transfer is proposed using static force balance theory and pinch instability theory. The phenomenon of droplet backward swing during welding process could be attributed to the vapor recoil force produced by vapors from the droplet. The welding experiments show that the proposed welding process is stable and that the weld quality produced is good.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 51175374) and the Natural Science Foundation of Tianjin (No. 16JCZDJC38700).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Tianjin University, Tianjin, 300350, China

    Lijun Yang, Tianxi He, Ying Liu, Yonglei Zhai & Huan Li

  2. Tianjin Key Laboratory of Advanced Joining Technology, Tianjin, 300350, China

    Lijun Yang, Tianxi He, Ying Liu, Yonglei Zhai & Huan Li

Authors
  1. Lijun Yang
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  2. Tianxi He
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  3. Ying Liu
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  4. Yonglei Zhai
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  5. Huan Li
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Correspondence to Lijun Yang.

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Yang, L., He, T., Liu, Y. et al. Droplet Transfer Behavior of Flux Cored Wire TIG Welding. Trans. Tianjin Univ. 24, 82–90 (2018). https://doi.org/10.1007/s12209-017-0086-6

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  • DOI: https://doi.org/10.1007/s12209-017-0086-6

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