Structure and Impact Strength of Weld Joints Manufactured from a Pipe Steel with the Use of Hybrid Laser-Arc Welding

The weld joints of pipes with a diameter of 1420 mm and a pipe-wall thickness of 30 mm manufactured by two different technologies have been studied. These technologies were (i) combining the laser arc welding when making a root weld with the subsequent submerged arc welding when applying cap welds a...

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Bibliographic Details
Published in:Physics of metals and metallography 2022-05, Vol.123 (5), p.535-541
Main Authors: Tereshchenko, N. A., Yakovleva, I. L., Fedorov, M. A., Gizatullin, A. B., Esiev, T. S.
Format: Article
Language:English
Subjects:
Bainite
Chemistry and Materials Science
Diameters
Ductile fracture
Impact strength
Laser beam welding
Materials Science
Metallic Materials
Pipe industry
Steel pipes
Strength and Plasticity
Submerged arc welding
Tubing industry
Wall thickness
Welded joints
Welding
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Summary:The weld joints of pipes with a diameter of 1420 mm and a pipe-wall thickness of 30 mm manufactured by two different technologies have been studied. These technologies were (i) combining the laser arc welding when making a root weld with the subsequent submerged arc welding when applying cap welds and (ii) the method of double-sided submerged arc welding. It has been shown that the first technology leads to the formation of a bainite-based disperse structure in weld joints, thereby providing a tough-ductile character of fracture and an increased level of impact strength for different positions of a notch with respect to the center of a weld joint.
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X22050167