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2022 №01 (01) DOI of Article
10.37434/tpwj2022.01.02
2022 №01 (03)

The Paton Welding Journal 2022 #01
The Paton Welding Journal, 2022, #1, 9-13 pages

Multiple-wire submerged arc welding of high-strength fine-grained steels

S. Gook1, B. El-Sari1, M. Biegler1, M. Rethmeier1, F. Lichtenthäler2, M. Stark2


1Fraunhofer Institute for Production Systems and Design Technology Pascalstrasse 8–9, 10587, Berlin, Germany. E-mail: sergej.gook@ipk.fraunhofer.de
2SMS group GmbH, Hirtenwiese 4, 57578, Elkenroth, Germany

Abstract
Ensuring the required mechanical-technological properties of welds is a critical issue in the application of multi-wire submerged arc welding processes for welding high-strength fine-grained steels. Excessive heat input is one of the main causes for microstructural zones with deteriorated mechanical properties of the welded joint, such as a reduced notched impact strength and a lower structural robustness. A process variant is proposed which reduces the weld volume as well as the heat input by adjusting the welding wire configuration as well as the energetic parameters of the arcs, while retaining the advantages of multiwire submerged arc welding such as high process stability and production speed.
Keywords: submerged arc welding, high-strength fine-grained steels, mechanical properties of the joints, energy parameters of the arc

Received: 23.12.2021
Accepted: 07.02.2022

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