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Mechanisms of weld pool flow and slag formation location in cold metal transfer (CMT) gas metal arc welding (GMAW)

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An Erratum to this article was published on 27 September 2017

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Abstract

This work investigates the weld pool flow behavior by observing the flow pattern of floating slag particles for cold metal transfer (CMT) gas metal arc welding (GMAW) using three different welding wires. These wires contain different amount of deoxidizers in the form of silicon and manganese. In situ high-speed videography shows that for the wire containing a high amount of deoxidizer, the weld pool flows from the center towards the toe. With the presence of a lower amount of deoxidizers, it flows from the toe towards the center. Besides, a higher amount of CO2 in the shielding gas changes the amount and location of slag formation. Chemical composition analysis of weld metals relates the weld pool flow behavior with the amount of dissolved oxygen (surface active element). The presence of adequate amount of oxygen in the weld pool can alter the weld pool flow pattern, which changes with the amount of deoxidizers present in the materials and the amount of oxygen supplied through the shielding gas. Based on this concept, the mechanisms involved in weld pool flow pattern and slag formation location for different composition of the consumables are disclosed to improve weld quality and productivity through the selection of the proper welding consumables in CMT-GMAW.

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Change history

  • 27 September 2017

    In the original publication of the article, the third author, Rouholah Ashiri, was not included. The original article has been corrected.

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Authors and Affiliations

  1. Department of Mechanical Engineering, International University of Business, Agriculture and Technology, Dhaka, 1230, Bangladesh

    Md. R . U. Ahsan

  2. Department of Advanced Materials Engineering, Dong-Eui University, Busan, 47340, Republic of Korea

    Md. R . U. Ahsan, Rouholah Ashiri, Chanyoung Jeong & Yeong -Do Park

  3. Department of Advanced Materials and Industrial Management Engineering, Dong-Eui University, Busan, 47340, Republic of Korea

    Muralimohan Cheepu & Yeong -Do Park

  4. Department of Materials Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran

    Rouholah Ashiri

  5. R&D Center, Kiswel Co. Ltd, Changwon, 704, Republic of Korea

    Tae-Hoon Kim

Authors
  1. Md. R . U. Ahsan
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  2. Muralimohan Cheepu
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  3. Rouholah Ashiri
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  4. Tae-Hoon Kim
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  5. Chanyoung Jeong
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  6. Yeong -Do Park
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Corresponding author

Correspondence to Yeong -Do Park.

Additional information

The original version of this article was revised: The third author, Rouholah Ashiri, was not included

Recommended for publication by Study Group 212 - The Physics of Welding

An erratum to this article is available at https://doi.org/10.1007/s40194-017-0512-3.

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Ahsan, M.R...U., Cheepu, M., Ashiri, R. et al. Mechanisms of weld pool flow and slag formation location in cold metal transfer (CMT) gas metal arc welding (GMAW). Weld World 61, 1275–1285 (2017). https://doi.org/10.1007/s40194-017-0489-y

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  • DOI: https://doi.org/10.1007/s40194-017-0489-y

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