Welding technology of steel cast G18CrMo4+QT with structural steel S355J2+N
adragoslav.dobras@mf.unibl.org
- DOI: https://doi.org/10.5937/zzk2202077D
- Article Type: Professional Paper
- Language: Serbian/English
- Received: September 2021
- Accepted: March 2022
Abstract
Welding technology of cast steel G18CrMo4+QT with structural steel S355J2+N is a welding of dissimilar steels. The problem of welding cast iron G18CrMo4+QT is the phenomenon of hardening of the structure due to the presence of unreleased martensite, which results in lower toughness and the formation of cold cracks. On the other hand, structural steel S355J2+N, depending on the thickness of the material, is also prone to the appearance of cold cracks. In order to prevent the formation of cracks and eliminate residuals stresses, it is necessary to perform preheating and heat treatment after welding. The paper presents welding technologies and subsequent heat treatment of G18CrMo4+QT cast iron joint with S355J2 + N structural steel with presentation of test results performed on a 12 mm thick welded sample, with V preparation of the joint, welded by MAG process in PA welding position.
Keywords
Steel cast, structural steel, welding technology
Acknowledgements
The paper was originally published in the Proceedings of the 31st Conference with International Participation Welding 2020, held in Kladovo, Serbia, from October 13 to 16, 2021.
References
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