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Transactions on Intelligent Welding Manufacturing pp 131–141Cite as

The Formation and Control of Porosity During GMA Welding of Galvanized Steel

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Part of the book series: Transactions on Intelligent Welding Manufacturing ((TRINWM))

Abstract

GMA lap welding of 1.4 mm thick galvanized steel DP780 was conducted in this investigation. Effects of different welding modes, heating inputs, and assembly conditions on the porosity in weld bead were examined by X-ray nondestructive detection. The experimental results reveal that the number of pores in the weld bead formed with double pulse (DP) mode is the minimum, compared to those formed under direct current (DC), pulse (P), cold metal transfer (CMT) and cold metal transfer and pulse (CMT+P) welding modes. The porosities ratios of the weld bead obtained using high heating input are improved compared to those obtained employing low heating input in DC, P, DP and CMT welding modes, respectively. The escape of zinc vapors through the reserved gap of 1 mm between steel plates effectively lessens the weld porosity, while the number of pores in the weld evidently increases as a copper liner board placed below galvanized steel plates for lap welding.

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Author information

Authors and Affiliations

  1. School of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou, 325035, China

    Yingming Wu & Xizhang Chen

  2. School of Material Science and Engineering, Jiangsu University, Zhenjiang, 212013, China

    Yingming Wu, Chao Hu & Xizhang Chen

Authors
  1. Yingming Wu
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  2. Chao Hu
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  3. Xizhang Chen
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Corresponding author

Correspondence to Xizhang Chen .

Editor information

Editors and Affiliations

  1. Shanghai Jiao Tong University, Shanghai, China

    Shanben Chen

  2. Department of Electrical and Computer Engineering, University of Kentucky, Lexington, KY, USA

    Yuming Zhang

  3. Oak Ridge National Laboratory, Oak Ridge, TN, USA

    Zhili Feng

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© 2019 Springer Nature Singapore Pte Ltd.

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Wu, Y., Hu, C., Chen, X. (2019). The Formation and Control of Porosity During GMA Welding of Galvanized Steel. In: Chen, S., Zhang, Y., Feng, Z. (eds) Transactions on Intelligent Welding Manufacturing. Transactions on Intelligent Welding Manufacturing. Springer, Singapore. https://doi.org/10.1007/978-981-13-3651-5_10

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