A thermodynamic assessment of precipitation, growth, and control of MnS inclusion in U75V heavy rail steel
Thermodynamic analysis of the precipitation behavior, growth kinetic, and control mechanism of MnS inclusion in U75V heavy rail steel was conducted in this study. The results showed that solute element S had a much higher segregation ratio than that of Mn, and MnS would only precipitate in the solid...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2021-06-01
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| Series: | High Temperature Materials and Processes |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/htmp-2021-0022 |
| _version_ | 1818488027822948352 |
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| author | Ren Wen-Qiang Wang Lu Xue Zheng-Liang Li Cheng-Zhi Zhu Hang-Yu Huang Ao Li Chang |
| author_facet | Ren Wen-Qiang Wang Lu Xue Zheng-Liang Li Cheng-Zhi Zhu Hang-Yu Huang Ao Li Chang |
| author_sort | Ren Wen-Qiang |
| collection | DOAJ |
| description | Thermodynamic analysis of the precipitation behavior, growth kinetic, and control mechanism of MnS inclusion in U75V heavy rail steel was conducted in this study. The results showed that solute element S had a much higher segregation ratio than that of Mn, and MnS would only precipitate in the solid–liquid (two-phase) regions at the late stage during the solidification process at the solid fraction of 0.9518. Increasing the cooling rate had no obvious influence on the precipitation time of MnS inclusion; however, its particle size would be decreased greatly. The results also suggested that increasing the concentration of Mn would lead to an earlier precipitation time of MnS, while it had little effect on the final particle size; as to S, it was found that increasing its concentration could not only make the precipitation time earlier but also make the particle size larger. Adding a certain amount of Ti additive could improve the mechanical properties of U75V heavy rail steel due to the formation of TiOx–MnS or MnS–TiS complex inclusions. The precipitation sequences of Ti3O5 → Ti2O3 → TiO2 → TiO → MnS → TiS for Ti treatment were determined based on the thermodynamic calculation. |
| first_indexed | 2024-12-10T16:45:51Z |
| format | Article |
| id | doaj.art-01aac7dec8364b9bbdaeb270229df1a8 |
| institution | Directory Open Access Journal |
| issn | 2191-0324 |
| language | English |
| last_indexed | 2024-12-10T16:45:51Z |
| publishDate | 2021-06-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | High Temperature Materials and Processes |
| spelling | doaj.art-01aac7dec8364b9bbdaeb270229df1a82022-12-22T01:41:04ZengDe GruyterHigh Temperature Materials and Processes2191-03242021-06-0140117819210.1515/htmp-2021-0022A thermodynamic assessment of precipitation, growth, and control of MnS inclusion in U75V heavy rail steelRen Wen-Qiang0Wang Lu1Xue Zheng-Liang2Li Cheng-Zhi3Zhu Hang-Yu4Huang Ao5Li Chang6Hubei Provincial Key Laboratory for New Processes of Ironmaking and Steelmaking, Wuhan University of Science and Technology, Wuhan 430081, Hubei, ChinaHubei Provincial Key Laboratory for New Processes of Ironmaking and Steelmaking, Wuhan University of Science and Technology, Wuhan 430081, Hubei, ChinaThe State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, Hubei, ChinaHubei Provincial Key Laboratory for New Processes of Ironmaking and Steelmaking, Wuhan University of Science and Technology, Wuhan 430081, Hubei, ChinaThe State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, Hubei, ChinaThe State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, Hubei, ChinaHubei Xinyegang Steel Co., Ltd, Huangshi 435001, Hubei, ChinaThermodynamic analysis of the precipitation behavior, growth kinetic, and control mechanism of MnS inclusion in U75V heavy rail steel was conducted in this study. The results showed that solute element S had a much higher segregation ratio than that of Mn, and MnS would only precipitate in the solid–liquid (two-phase) regions at the late stage during the solidification process at the solid fraction of 0.9518. Increasing the cooling rate had no obvious influence on the precipitation time of MnS inclusion; however, its particle size would be decreased greatly. The results also suggested that increasing the concentration of Mn would lead to an earlier precipitation time of MnS, while it had little effect on the final particle size; as to S, it was found that increasing its concentration could not only make the precipitation time earlier but also make the particle size larger. Adding a certain amount of Ti additive could improve the mechanical properties of U75V heavy rail steel due to the formation of TiOx–MnS or MnS–TiS complex inclusions. The precipitation sequences of Ti3O5 → Ti2O3 → TiO2 → TiO → MnS → TiS for Ti treatment were determined based on the thermodynamic calculation.https://doi.org/10.1515/htmp-2021-0022u75v heavy rail steelmns inclusionthermodynamic calculationti treatment |
| spellingShingle | Ren Wen-Qiang Wang Lu Xue Zheng-Liang Li Cheng-Zhi Zhu Hang-Yu Huang Ao Li Chang A thermodynamic assessment of precipitation, growth, and control of MnS inclusion in U75V heavy rail steel High Temperature Materials and Processes u75v heavy rail steel mns inclusion thermodynamic calculation ti treatment |
| title | A thermodynamic assessment of precipitation, growth, and control of MnS inclusion in U75V heavy rail steel |
| title_full | A thermodynamic assessment of precipitation, growth, and control of MnS inclusion in U75V heavy rail steel |
| title_fullStr | A thermodynamic assessment of precipitation, growth, and control of MnS inclusion in U75V heavy rail steel |
| title_full_unstemmed | A thermodynamic assessment of precipitation, growth, and control of MnS inclusion in U75V heavy rail steel |
| title_short | A thermodynamic assessment of precipitation, growth, and control of MnS inclusion in U75V heavy rail steel |
| title_sort | thermodynamic assessment of precipitation growth and control of mns inclusion in u75v heavy rail steel |
| topic | u75v heavy rail steel mns inclusion thermodynamic calculation ti treatment |
| url | https://doi.org/10.1515/htmp-2021-0022 |
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