The Paton Welding Journal, 2025, №07

2025 №07 (07)

DOI of Article 10.37434/tpwj2025.07.01

2025 №07 (02)

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The Paton Welding Journal, 2025, #7, 3-10 pages

Effectiveness of application of pulsed mode of arc burning in WET underwater welding

S. Maksymov, D. Krazhanovskyi

E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: maksimov@paton.kiev.ua

Abstract
A comparative analysis of methods for implementing the pulsed nature of arc burning — pulsed-arc welding by changing the shape of the external volt-ampere characteristic of the power source and pulsed wire feeding and their parameters when welding with flux-cored wire with a non-stationary arc in an aqueous environment was carried out. The results obtained showed the greater efficiency of using pulsed welding wire feed: the coefficient of variation in voltage decreases by 1.5 times, and the frequency of short circuits — by 2.5 times; the depth of penetration and reinforcement of the weld changes by 63 and 55 %, respectively; the transition of alloying elements C, Si, Mn and Ni increases by 38, 30, 47 and 35 %, respectively; a study of the hydrogenation mechanism during wet underwater welding showed that most of the hydrogen (60‒70 %) enters the weld pool along with a drop of electrode metal, which is saturated with it from the atmosphere of the vapour-gas bubble. Pulse action shortens the lifetime of liquid metal at the droplet stage, which leads to a decrease in the hydrogen content in the weld metal by an average of 27 %.
Keywords: wet underwater welding, flux-cored wire, pulsed mode, effectiveness

Received: 12.02.2025
Received in revised form: 17.04.2025
Accepted: 04.07.2025

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Suggested Citation

S. Maksymov, D. Krazhanovskyi (2025) Effectiveness of application of pulsed mode of arc burning in WET underwater welding. The Paton Welding J., 07, 3-10.

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