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Influence of Long-Term Subcritical Annealing on the Unalloyed Steel Welded Joint Microstructure
The article presents changes in the microstructure of hot-rolled unalloyed structural steel after the arc welding process and in the state after long-term exposure to 600 °C during operation. These studies enable a clear assessment of the effects of long-term exposure to elevated temperature relativ...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9822357/ https://www.ncbi.nlm.nih.gov/pubmed/36614642 http://dx.doi.org/10.3390/ma16010304 |
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author | Fajt, Dominika Maślak, Mariusz Stankiewicz, Marek Zajdel, Paulina Pańcikiewicz, Krzysztof |
author_facet | Fajt, Dominika Maślak, Mariusz Stankiewicz, Marek Zajdel, Paulina Pańcikiewicz, Krzysztof |
author_sort | Fajt, Dominika |
collection | PubMed |
description | The article presents changes in the microstructure of hot-rolled unalloyed structural steel after the arc welding process and in the state after long-term exposure to 600 °C during operation. These studies enable a clear assessment of the effects of long-term exposure to elevated temperature relative to the as-welded condition, which has not been reported. The microstructure examination was carried out on welded joints in eight different zones of the joint. Studies have shown that the welding thermal cycle causes significant changes in the microstructure in the area of the base material heated above the A(1) temperature—the heat-affected zone (HAZ)—and in the weld area in the case of multi-pass welding. The long-term exposure of the subcritical temperature of 600 °C on the welded joint leads to the phenomenon of cementite spheroidization in the pearlite in all zones of the joint, while preserving the band structure of the steel after rolling and the structural structure. In the case of the weld, acicular and side-plate ferrite disappearance was observed. |
format | Online Article Text |
id | pubmed-9822357 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-98223572023-01-07 Influence of Long-Term Subcritical Annealing on the Unalloyed Steel Welded Joint Microstructure Fajt, Dominika Maślak, Mariusz Stankiewicz, Marek Zajdel, Paulina Pańcikiewicz, Krzysztof Materials (Basel) Article The article presents changes in the microstructure of hot-rolled unalloyed structural steel after the arc welding process and in the state after long-term exposure to 600 °C during operation. These studies enable a clear assessment of the effects of long-term exposure to elevated temperature relative to the as-welded condition, which has not been reported. The microstructure examination was carried out on welded joints in eight different zones of the joint. Studies have shown that the welding thermal cycle causes significant changes in the microstructure in the area of the base material heated above the A(1) temperature—the heat-affected zone (HAZ)—and in the weld area in the case of multi-pass welding. The long-term exposure of the subcritical temperature of 600 °C on the welded joint leads to the phenomenon of cementite spheroidization in the pearlite in all zones of the joint, while preserving the band structure of the steel after rolling and the structural structure. In the case of the weld, acicular and side-plate ferrite disappearance was observed. MDPI 2022-12-28 /pmc/articles/PMC9822357/ /pubmed/36614642 http://dx.doi.org/10.3390/ma16010304 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Fajt, Dominika Maślak, Mariusz Stankiewicz, Marek Zajdel, Paulina Pańcikiewicz, Krzysztof Influence of Long-Term Subcritical Annealing on the Unalloyed Steel Welded Joint Microstructure |
title | Influence of Long-Term Subcritical Annealing on the Unalloyed Steel Welded Joint Microstructure |
title_full | Influence of Long-Term Subcritical Annealing on the Unalloyed Steel Welded Joint Microstructure |
title_fullStr | Influence of Long-Term Subcritical Annealing on the Unalloyed Steel Welded Joint Microstructure |
title_full_unstemmed | Influence of Long-Term Subcritical Annealing on the Unalloyed Steel Welded Joint Microstructure |
title_short | Influence of Long-Term Subcritical Annealing on the Unalloyed Steel Welded Joint Microstructure |
title_sort | influence of long-term subcritical annealing on the unalloyed steel welded joint microstructure |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9822357/ https://www.ncbi.nlm.nih.gov/pubmed/36614642 http://dx.doi.org/10.3390/ma16010304 |
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