COLD BENDING CHARACTERISTICS OF MAG PULSE WELDING OF API 5LX65 THERMO MECHANICAL TREATED STEEL

1 SIMIONESCU Dinu
Co-authors:
2 MITELEA Ion 3 BURCĂ Mircea 4 UŢU Dragoş
Institutions:
1 „Politehnica“ University of Timisoara, Timisoara, Romania, EU, rector@upt.ro dinusim@yahoo.ca
2 „Politehnica“ University of Timisoara, Timisoara, Romania, EU, rector@upt.ro ion.mitelea@upt.ro
3 „Politehnica“ University of Timisoara, Timisoara, Romania, EU, rector@upt.ro mburca55@yahoo.com
4 „Politehnica“ University of Timisoara, Timisoara, Romania, EU, rector@upt.ro dragos.utu@upt.ro
Conference:
28th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 22nd - 24th 2019
Proceedings:
Proceedings 28th International Conference on Metallurgy and Materials
Pages:
532-537
ISBN:
978-80-87294-92-5
ISSN:
2694-9296
Published:
4th November 2019
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
44 views / 20 downloads
Abstract

Thermo mechanical treated steel API 5LX65 has high mechanical characteristics and is intended for the welding of main pipelines for the oil and natural gas transportation.The pipes made of this steel have a diameter of 42 '' (1066.8mm) and a wall thickness of 31.75mm.They were welded by narrow gap MAG welding selecting a filler metal for the root layer and another filler metal for the filling layers. Testing of the plastic deformation behavior of the welded joints was done by cold bending tests on both specimens in which the longitudinal axis of the welded joint is perpendicular to the axis of the support rollers and parallel to the direction of application of the force as well as on the notched specimens. The results obtained were corroborated with macro - and micro fractographic investigations.

Keywords: Thermomechanical treatment steel, welding, cold bending
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