Study on the arc behavior of laminar plasma arc welding

Articles in Press

Document Type : Research Article

Authors

1 No. 111, Shenliao West Road, Economic & Technological Development Zone, Shenyang

2 Liaoning Xinyuan Special Welding Technology Co., Ltd

3 No. 111, Shenliao West Road, Economic & Technological Development Zone, Shenyang

10.24200/sci.2025.65167.9330

Abstract

Laminar non-transfer arc of laminar plasma arc has the characteristics of long jet length, low temperature gradient, and good controllability, and is often used for cutting, spraying, and surface treatment, but rarely for welding due to its lower arc heat. The combined laminar plasma arc, composed of the laminar non-transfer arc and the transfer arc, has better welding penetration, but research on its welding characteristics is still lacking. The arc behavior is studied in this paper to expand its application range. The experimental results show that the laminar plasma arc can be obtained with the proper shielding gas and plasma gas flow. The maximum arc ignition height is mainly determined by non-transfer arc current, while arc shape and arc pressure mainly depend on transfer arc current. The arc pressure sharply decreases with the increase of arc ignition height below 20 mm. Furthermore, potential welding applications and their prospects have been discussed. It was found that the transfer arc plays a crucial role in welding formation, while the non-transfer arc can enhance welding adaptability due to the control of arc ignition height. This heat source is highly suitable for thick plate narrow gap welding and shows promising prospects.

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Scientia Iranica

Articles in Press, Accepted Manuscript
Available Online from 10 June 2025

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History

  • Receive Date: 18 August 2024
  • Revise Date: 13 March 2025
  • Accept Date: 10 June 2025

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