Welding of pipes from low-carbon steel by TIG procedure
agojic@simet.unizg.hr
- DOI: https://doi.org/10.5937/zzk2303133K
- Article Type: Professional Paper
- Language: Serbian/English
- Received: August 2022
- Accepted: May 2023
Abstract
In this work the results of welding the pipes from lowcarbon steel St 35.8 (Č.1214, DIN17175, W.Nr. 1.0305, ENP235GH) by TIG procedure were shown. After welding, the microstructure analysis by means of optical microscope was performed. Microstructural analysis out on the base material, heat affected zone and melting zone was carried. It was found that the base material has ferritepearlite microstructure with hardness 148 HV10, while in the heat affected zone is present ferritepearlite microstructure with Widmanstatten ferrite in some places with hardness 176 HV10. A cast microstructure consisting of ferrite and bainite was observed in the melting zone with hardness 228.7 HV10.
Keywords
welding, lowcarbon steel, microstructure, hardness
Acknowledgements
The paper was originally published in the Proceedings of the 32nd Conference with International Participation Welding 2022, held at Tara, Serbia, from October 12 to 15, 2022.
References
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