Underwater Twin-Arc Gas Metal Arc Welding for Low-Alloy Shipbuilding Steel
Aneliya Stoyanova1, Tatyana Mechkarova2, Mariya Konsulova-Bakalova3, Krastin Yordanov4
1Aneliya Stoyanova, Assistant, Department of Technology of Machine Tools and Manufacturing, Technical University of Varna, Bulgaria.
2Tatyana Mechkarova, Assistant, Department of Materials Science and Technology, Technical University of Varna, Bulgaria.
3Mariya Konsulova-Bakalova, Prof. assistant, Department of Technology of Machine Tools and Manufacturing, Technical University of Varna, Bulgaria.
4Krastin Yordanov, Prof. assistant, Department of Thermal Engineering, Technical University of Varna, Bulgaria.
Manuscript received on 06 November 2020 | Revised Manuscript received on 30 November 2020 | Manuscript Accepted on 15 December 2020 | Manuscript published on 30 December 2020 | PP: 7-12 | Volume-1 Issue-1, December 2020 | Retrieval Number: A1002021121/2021©LSP
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© The Authors. Published by Lattice Science Publication (LSP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: The present work determines the impact of some of the main factors influencing the quality of the welding joint during underwater welding in gas metal arc welding (GMAW) with two arcs supplied by two power sources. The variables chosen are: the alteration of the currents in the welding arcs, the distance between the arcs and the welding speed. The problem is solved by mathematical planning of the experiment whereby the optimization parameter is the hardness in the zone of thermal influence. The experiments were carried out on the basis of the accepted Common Central Composite Plan (CCCP) with the selected factors and levels of variation. The processing of the statistical data through the Microsoft Office Excel software enables the calculation of the regression coefficients and the regression equation.
Keywords: Underwater Twin-Arc Welding; Gas Metal Arc Welding (GMAW); Low-Alloy Shipbuilding Steel.