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Effect of Lanthanum Addition on Formation Behaviors of Inclusions in Q355B Weathering Steel

The effect of lanthanum addition on the formation behaviors of inclusions in Q355B weathering steel was investigated by laboratory experiments and thermodynamic calculations. The results demonstrate that the main inclusions in weathering steel without La addition are large-sized irregular Al(2)O(3)...

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Autores principales: Mao, Ning, Yang, Wensheng, Chen, Dehong, Lu, Wenli, Zhang, Xiaowei, Chen, Shiying, Xu, Minglei, Pan, Bo, Han, Liguo, Zhang, Xiaoqiang, Wang, Zhiqiang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9695262/
https://www.ncbi.nlm.nih.gov/pubmed/36431436
http://dx.doi.org/10.3390/ma15227952
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author Mao, Ning
Yang, Wensheng
Chen, Dehong
Lu, Wenli
Zhang, Xiaowei
Chen, Shiying
Xu, Minglei
Pan, Bo
Han, Liguo
Zhang, Xiaoqiang
Wang, Zhiqiang
author_facet Mao, Ning
Yang, Wensheng
Chen, Dehong
Lu, Wenli
Zhang, Xiaowei
Chen, Shiying
Xu, Minglei
Pan, Bo
Han, Liguo
Zhang, Xiaoqiang
Wang, Zhiqiang
author_sort Mao, Ning
collection PubMed
description The effect of lanthanum addition on the formation behaviors of inclusions in Q355B weathering steel was investigated by laboratory experiments and thermodynamic calculations. The results demonstrate that the main inclusions in weathering steel without La addition are large-sized irregular Al(2)O(3) and MnS, with an average size of about 5.35 μm. As La content increases from 0.0075 to 0.0184 wt.%, the dominant inclusions transform from MnS, LaAlO(3), and Al(2)O(3)-LaAlO(3) into MnS, La(2)O(3), and LaAlO(3)-La(2)O(3). Meanwhile, the average size of inclusions significantly decreases from 3.4 to 2.48 μm and the distribution is more dispersive. When the La content increases to 0.0425 wt.%, the original MnS and Al(2)O(3) inclusions are completely modified into La(2)O(2)S and La(2)O(3) but the inclusions demonstrate serious agglomeration and growth. The thermodynamic calculations indicate that Al(2)O(3) and various lanthanum-containing inclusions are formed in the liquid phase. As the La content in molten steel increases from 0 to 0.0425 wt.%, the Al(2)O(3) inclusion is inclined to be modified into lanthanum oxide and lanthanum oxysulfide and the modification process is Al(2)O(3) → LaAlO(3) → La(2)O(3) → La(2)O(2)S, which is very consistent with the experimental observations.
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spelling pubmed-96952622022-11-26 Effect of Lanthanum Addition on Formation Behaviors of Inclusions in Q355B Weathering Steel Mao, Ning Yang, Wensheng Chen, Dehong Lu, Wenli Zhang, Xiaowei Chen, Shiying Xu, Minglei Pan, Bo Han, Liguo Zhang, Xiaoqiang Wang, Zhiqiang Materials (Basel) Article The effect of lanthanum addition on the formation behaviors of inclusions in Q355B weathering steel was investigated by laboratory experiments and thermodynamic calculations. The results demonstrate that the main inclusions in weathering steel without La addition are large-sized irregular Al(2)O(3) and MnS, with an average size of about 5.35 μm. As La content increases from 0.0075 to 0.0184 wt.%, the dominant inclusions transform from MnS, LaAlO(3), and Al(2)O(3)-LaAlO(3) into MnS, La(2)O(3), and LaAlO(3)-La(2)O(3). Meanwhile, the average size of inclusions significantly decreases from 3.4 to 2.48 μm and the distribution is more dispersive. When the La content increases to 0.0425 wt.%, the original MnS and Al(2)O(3) inclusions are completely modified into La(2)O(2)S and La(2)O(3) but the inclusions demonstrate serious agglomeration and growth. The thermodynamic calculations indicate that Al(2)O(3) and various lanthanum-containing inclusions are formed in the liquid phase. As the La content in molten steel increases from 0 to 0.0425 wt.%, the Al(2)O(3) inclusion is inclined to be modified into lanthanum oxide and lanthanum oxysulfide and the modification process is Al(2)O(3) → LaAlO(3) → La(2)O(3) → La(2)O(2)S, which is very consistent with the experimental observations. MDPI 2022-11-10 /pmc/articles/PMC9695262/ /pubmed/36431436 http://dx.doi.org/10.3390/ma15227952 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
Mao, Ning
Yang, Wensheng
Chen, Dehong
Lu, Wenli
Zhang, Xiaowei
Chen, Shiying
Xu, Minglei
Pan, Bo
Han, Liguo
Zhang, Xiaoqiang
Wang, Zhiqiang
Effect of Lanthanum Addition on Formation Behaviors of Inclusions in Q355B Weathering Steel
title Effect of Lanthanum Addition on Formation Behaviors of Inclusions in Q355B Weathering Steel
title_full Effect of Lanthanum Addition on Formation Behaviors of Inclusions in Q355B Weathering Steel
title_fullStr Effect of Lanthanum Addition on Formation Behaviors of Inclusions in Q355B Weathering Steel
title_full_unstemmed Effect of Lanthanum Addition on Formation Behaviors of Inclusions in Q355B Weathering Steel
title_short Effect of Lanthanum Addition on Formation Behaviors of Inclusions in Q355B Weathering Steel
title_sort effect of lanthanum addition on formation behaviors of inclusions in q355b weathering steel
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9695262/
https://www.ncbi.nlm.nih.gov/pubmed/36431436
http://dx.doi.org/10.3390/ma15227952
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