Phase Transformation Behaviors of Medium Carbon Steels Produced by Twin Roll Casting and Compact Strip Production Processes
Medium carbon steels have been widely used in the fields of tool and die manufacturing due to their outstanding hardness and wear resistance. In this study, microstructures of 50# steel strips fabricated by twin roll casting (TRC) and compact strip production (CSP) processes were analyzed to investi...
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2023-02-01
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author | Shaohua Li Haibo Feng Shuize Wang Junheng Gao Haitao Zhao Honghui Wu Shuai Xu Qingxiao Feng Hualong Li Xinyuan Liu Guilin Wu |
author_facet | Shaohua Li Haibo Feng Shuize Wang Junheng Gao Haitao Zhao Honghui Wu Shuai Xu Qingxiao Feng Hualong Li Xinyuan Liu Guilin Wu |
author_sort | Shaohua Li |
collection | DOAJ |
description | Medium carbon steels have been widely used in the fields of tool and die manufacturing due to their outstanding hardness and wear resistance. In this study, microstructures of 50# steel strips fabricated by twin roll casting (TRC) and compact strip production (CSP) processes were analyzed to investigate the influences of solidification cooling rate, rolling reduction, and coiling temperature on composition segregation, decarburization, and pearlitic phase transformation. The results show that a partial decarburization layer with a thickness of 13.3 μm and banded C-Mn segregation were observed in the 50# steel produced by CSP, leading to the banded distributions of ferrite and pearlite in the C-Mn poor regions and C-Mn rich regions, respectively. For the steel fabricated by TRC, owing to the sub-rapid solidification cooling rate and short processing time at high temperatures, neither apparent C-Mn segregation nor decarburization was observed. In addition, the steel strip fabricated by TRC has higher pearlite volume fractions, larger pearlite nodule sizes, smaller pearlite colony sizes and interlamellar spacings due to the co-influence of larger prior austenite grain size and lower coiling temperatures. The alleviated segregation, eliminated decarburization and large volume fraction of pearlite render TRC a promising process for medium carbon steel production. |
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id | doaj.art-e1ffc34d07c04354872a7b079ba1b431 |
institution | Directory Open Access Journal |
issn | 1996-1944 |
language | English |
last_indexed | 2024-03-11T07:19:05Z |
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series | Materials |
spelling | doaj.art-e1ffc34d07c04354872a7b079ba1b4312023-11-17T08:05:40ZengMDPI AGMaterials1996-19442023-02-01165198010.3390/ma16051980Phase Transformation Behaviors of Medium Carbon Steels Produced by Twin Roll Casting and Compact Strip Production ProcessesShaohua Li0Haibo Feng1Shuize Wang2Junheng Gao3Haitao Zhao4Honghui Wu5Shuai Xu6Qingxiao Feng7Hualong Li8Xinyuan Liu9Guilin Wu10Innovation Research Institute for Carbon Neutrality, University of Science and Technology Beijing, Beijing 100083, ChinaInnovation Research Institute for Carbon Neutrality, University of Science and Technology Beijing, Beijing 100083, ChinaInnovation Research Institute for Carbon Neutrality, University of Science and Technology Beijing, Beijing 100083, ChinaInnovation Research Institute for Carbon Neutrality, University of Science and Technology Beijing, Beijing 100083, ChinaInnovation Research Institute for Carbon Neutrality, University of Science and Technology Beijing, Beijing 100083, ChinaInnovation Research Institute for Carbon Neutrality, University of Science and Technology Beijing, Beijing 100083, ChinaInnovation Research Institute for Carbon Neutrality, University of Science and Technology Beijing, Beijing 100083, ChinaInstitute of Research of Iron and Steel, Shasteel, Zhangjiagang 215625, ChinaInstitute of Research of Iron and Steel, Shasteel, Zhangjiagang 215625, ChinaInstitute of Research of Iron and Steel, Shasteel, Zhangjiagang 215625, ChinaInnovation Research Institute for Carbon Neutrality, University of Science and Technology Beijing, Beijing 100083, ChinaMedium carbon steels have been widely used in the fields of tool and die manufacturing due to their outstanding hardness and wear resistance. In this study, microstructures of 50# steel strips fabricated by twin roll casting (TRC) and compact strip production (CSP) processes were analyzed to investigate the influences of solidification cooling rate, rolling reduction, and coiling temperature on composition segregation, decarburization, and pearlitic phase transformation. The results show that a partial decarburization layer with a thickness of 13.3 μm and banded C-Mn segregation were observed in the 50# steel produced by CSP, leading to the banded distributions of ferrite and pearlite in the C-Mn poor regions and C-Mn rich regions, respectively. For the steel fabricated by TRC, owing to the sub-rapid solidification cooling rate and short processing time at high temperatures, neither apparent C-Mn segregation nor decarburization was observed. In addition, the steel strip fabricated by TRC has higher pearlite volume fractions, larger pearlite nodule sizes, smaller pearlite colony sizes and interlamellar spacings due to the co-influence of larger prior austenite grain size and lower coiling temperatures. The alleviated segregation, eliminated decarburization and large volume fraction of pearlite render TRC a promising process for medium carbon steel production.https://www.mdpi.com/1996-1944/16/5/1980twin roll castingcompact strip productionsegregationdecarburizationphase transformation |
spellingShingle | Shaohua Li Haibo Feng Shuize Wang Junheng Gao Haitao Zhao Honghui Wu Shuai Xu Qingxiao Feng Hualong Li Xinyuan Liu Guilin Wu Phase Transformation Behaviors of Medium Carbon Steels Produced by Twin Roll Casting and Compact Strip Production Processes Materials twin roll casting compact strip production segregation decarburization phase transformation |
title | Phase Transformation Behaviors of Medium Carbon Steels Produced by Twin Roll Casting and Compact Strip Production Processes |
title_full | Phase Transformation Behaviors of Medium Carbon Steels Produced by Twin Roll Casting and Compact Strip Production Processes |
title_fullStr | Phase Transformation Behaviors of Medium Carbon Steels Produced by Twin Roll Casting and Compact Strip Production Processes |
title_full_unstemmed | Phase Transformation Behaviors of Medium Carbon Steels Produced by Twin Roll Casting and Compact Strip Production Processes |
title_short | Phase Transformation Behaviors of Medium Carbon Steels Produced by Twin Roll Casting and Compact Strip Production Processes |
title_sort | phase transformation behaviors of medium carbon steels produced by twin roll casting and compact strip production processes |
topic | twin roll casting compact strip production segregation decarburization phase transformation |
url | https://www.mdpi.com/1996-1944/16/5/1980 |
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