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Magnetic-enhanced common conductive channel characteristics of two-electrode TIG

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Abstract

In this paper, a self-designed cusp external magnetic field (EMF) was employed to assist the two-electrode TIG (T-TIG), and its common conductive channel characteristics were aimed to optimize the energy distribution of T-TIG. The influences of the cusp EMF on arc morphology, arc plasma information, and arc pressure of T-TIG were respectively analyzed based on a high-speed camera, spectrograph, and pressure sensor. The results showed that the cusp EMF could compress T-TIG in the direction parallel to the array of two electrodes of T-TIG, and thus, a common conductive channel with stronger brightness and higher stiffness was obtained. Besides, by applied cusp EMF, the electron temperature and electron density of the common conductive channel of T-TIG were increased, and in the radial, the distributions of electron temperature and electron density of T-TIG were more concentrated. Under the condition of welding current of 40 A + 40 A, the electron density on the central axis of T-TIG could be increased by 16% by applied cusp EMF with a 30 A excitation current. In addition, the enhanced common conductive channel characteristics of T-TIG by the cusp EMF caused the arc pressure on the central axis of T-TIG to be increased by 14%, which was beneficial to improve the weld penetration.

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Funding

This work was supported by the National Key Research and Development Program of China(2018YFB1107900), and the National Natural Science Foundation of China (No. U1960111).

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Authors and Affiliations

  1. Liaoning Key Laboratory of Advanced Welding and Joining Technology, Dalian University of Technology, Dalian, 116024, China

    Yanli Zhu, Xinkun Xu, Runtao Liu & Liming Liu

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  1. Yanli Zhu
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  2. Xinkun Xu
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  3. Runtao Liu
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  4. Liming Liu
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Contributions

Yanli Zhu: methodology, writing-original draft, formal analysis.

Xinkun Xu: supervision, validation.

Runtao Liu: conceptualization.

Liming Liu: conceptualization, writing-review and editing, funding acquisition.

Corresponding author

Correspondence to Liming Liu.

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Zhu, Y., Xu, X., Liu, R. et al. Magnetic-enhanced common conductive channel characteristics of two-electrode TIG. Int J Adv Manuf Technol 116, 3217–3229 (2021). https://doi.org/10.1007/s00170-021-07674-3

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  • DOI: https://doi.org/10.1007/s00170-021-07674-3

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