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Effect of welding variables on GTAW arc stagnation pressure

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Abstract

This paper presents the influence of welding current, electrode-workpiece distance, electrode composition, electrode diameter, electrode tip angle, shielding gas composition, and pulsed current frequency over the arc stagnation pressure of gas tungsten arc welding (GTAW). In this study, arc application tests were carried out over a 1-mm diameter hole on a non-melting water-cooled copper plate. The hole was connected to a differential pressure sensor through an extension tube. As a result, the welding arc pressure was observed to be directly proportional to the square of the welding current and to the tungsten electrode diameter. Moreover, the pressure increases as the electrode-workpiece distance is reduced, and it is inversely proportional to the electrode tip angle, for angles greater than 45°. Also, the electrode composition, the pulsed current frequency, and the gas composition influence the welding arc stagnation pressure.

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Acknowledgments

The authors are grateful to the Welding Technology Laboratory (LTS) of the Federal University of Santa Catarina (UFSC, Technological Center of Joinville), the Brazilian National Council for Scientific and Technological Development (CNPq), and the company IMC Soldagem for supporting of this work.

Funding

The Brazilian National Council for Scientific and Technological Development (CNPq) supported the present work by funding research grants.

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Authors and Affiliations

  1. Technological Center of Joinville, Federal University of Santa Catarina, Dona Francisca, 8300 – Block U. Zona Industrial Norte, Joinville, SC, 89219-600, Brazil

    Gabriel de Simas Asquel, Ana Paula Storto Bittencourt & Tiago Vieira da Cunha

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  1. Gabriel de Simas Asquel
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  2. Ana Paula Storto Bittencourt
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  3. Tiago Vieira da Cunha
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Correspondence to Gabriel de Simas Asquel.

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de Simas Asquel, G., Bittencourt, A.P.S. & da Cunha, T.V. Effect of welding variables on GTAW arc stagnation pressure. Weld World 64, 1149–1160 (2020). https://doi.org/10.1007/s40194-020-00919-x

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