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The International Journal of Advanced Manufacturing Technology

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24-10-2023 | ORIGINAL ARTICLE

Study on the heat input regulation mechanism of compound excitation device and its influence on arc shape and penetration behavior in GTAW

Authors: Wei Zhou, Jianfeng Yue, Pu Zhong, Haojie Chen, Hao Zhou

Published in: The International Journal of Advanced Manufacturing Technology | Issue 7-8/2023

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Abstract

In order to realize the heat input regulation in the gas tungsten arc welding (GTAW) process, a novel compound excitation device consisting of a longitudinal magnetic field and a cusp magnetic field was developed in this paper. The magnetic field distribution law in the arc zone was analyzed under various excitation parameters of the device. Using 316L austenitic stainless steel as the base metal, the variation law of arc and weld penetration under different coupling excitation parameters was studied. The research reveals that the magnetic induction intensity in arc zone approximately conforms to the linear superposition law of two single magnetic fields. Under the compound excitation device, the welding arc is compressed while maintaining its deflection, causing its cross-section to change from circular to elliptical. Under the premise that the longitudinal excitation current maintains the arc deflection angle, an increase in cusp excitation current results in a decrease in weld width and arc bottom area, while increasing weld penetration, metal melting area, and arc voltage. These results indicate that the compound excitation device can effectively regulate the heat input distribution and arc heat flux density.

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Title: Study on the heat input regulation mechanism of compound excitation device and its influence on arc shape and penetration behavior in GTAW
Authors: Wei Zhou
Jianfeng Yue
Pu Zhong
Haojie Chen
Hao Zhou
Publication date: 24-10-2023
Publisher: Springer London
Published in: The International Journal of Advanced Manufacturing Technology / Issue 7-8/2023
Print ISSN: 0268-3768
Electronic ISSN: 1433-3015
DOI: https://doi.org/10.1007/s00170-023-12479-7

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