Effect of Zr addition on MnS inclusion characteristics and mechanical properties in medium carbon ferrite-pearlite steel
In this paper, the influence of decreasing Zr content (0.0110 wt%, 0.0044 wt%) on the microstructure, MnS inclusion characteristics, and mechanical properties of medium carbon ferrite-pearlite steel was studied. The results show that the volume fraction of intragranular ferrite (IGF) in steel increa...
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Elsevier
2024-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424023937 |
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| author | Li Hao Chaolei Zhang Chenxuan Liu Jianlin Sun Wanli Sun Shuize Wang Junheng Gao Honghui Wu Haitao Zhao Xinping Mao |
| author_facet | Li Hao Chaolei Zhang Chenxuan Liu Jianlin Sun Wanli Sun Shuize Wang Junheng Gao Honghui Wu Haitao Zhao Xinping Mao |
| author_sort | Li Hao |
| collection | DOAJ |
| description | In this paper, the influence of decreasing Zr content (0.0110 wt%, 0.0044 wt%) on the microstructure, MnS inclusion characteristics, and mechanical properties of medium carbon ferrite-pearlite steel was studied. The results show that the volume fraction of intragranular ferrite (IGF) in steel increases with a reduction in Zr content. The ductility of the steel is reduced by 1.83%, the impact toughness is increased by 2.5 times, and the yield strength is almost unchanged. Compound MnS inclusions are the main inclusions that induce IGF formation. The proportion of heterogeneous nucleation of MnS inclusions using oxides as nucleation sites is increased, which is the main reason for the increase in the volume fraction of IGF. Furthermore, MnS inclusions change from type Ⅲ to type Ⅰ and Ⅱ, and their distribution is gradually uniform. Thermodynamic analysis reveals that the underlying cause for the morphological transformation of MnS inclusions is the rapid surge in the supersaturation of S element in molten steel. The presence of liquid-phase low-melting inclusions (MnS–Al2O3) promotes the formation of type Ⅰ MnS inclusions. The volume fraction and the dimension perpendicular to the fracture surface of the MnS inclusions are increased by at least 33% and 111%, while their aspect ratio is reduced by a maximum of up to 19%. The change in the volume fraction of MnS inclusions is the primary factor contributing to the decrease of tensile plasticity. The toughness of steel is mainly affected by the aspect ratio and the dimension perpendicular to the fracture surface of MnS inclusions. |
| format | Article |
| id | doaj-art-285a8aac83964ef3aa383fcc78dc57fd |
| institution | OA Journals |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
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| series | Journal of Materials Research and Technology |
| spelling | doaj-art-285a8aac83964ef3aa383fcc78dc57fd2025-08-20T02:35:26ZengElsevierJournal of Materials Research and Technology2238-78542024-11-01334654467310.1016/j.jmrt.2024.10.123Effect of Zr addition on MnS inclusion characteristics and mechanical properties in medium carbon ferrite-pearlite steelLi Hao0Chaolei Zhang1Chenxuan Liu2Jianlin Sun3Wanli Sun4Shuize Wang5Junheng Gao6Honghui Wu7Haitao Zhao8Xinping Mao9Institute for Carbon Neutrality, University of Science and Technology Beijing, Beijing, 100083, China; School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, ChinaInstitute for Carbon Neutrality, University of Science and Technology Beijing, Beijing, 100083, China; Institute of Steel Sustainable Technology, Liaoning Academy of Materials, Shenyang, 110167, Liaoning, China; Corresponding author. Institute for Carbon Neutrality, University of Science and Technology Beijing, Beijing 100083, China.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, ChinaSchool of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, ChinaInstitute for Carbon Neutrality, University of Science and Technology Beijing, Beijing, 100083, China; Institute of Steel Sustainable Technology, Liaoning Academy of Materials, Shenyang, 110167, Liaoning, ChinaInstitute for Carbon Neutrality, University of Science and Technology Beijing, Beijing, 100083, China; Institute of Steel Sustainable Technology, Liaoning Academy of Materials, Shenyang, 110167, Liaoning, ChinaInstitute for Carbon Neutrality, University of Science and Technology Beijing, Beijing, 100083, China; Institute of Steel Sustainable Technology, Liaoning Academy of Materials, Shenyang, 110167, Liaoning, ChinaInstitute for Carbon Neutrality, University of Science and Technology Beijing, Beijing, 100083, China; Institute of Steel Sustainable Technology, Liaoning Academy of Materials, Shenyang, 110167, Liaoning, ChinaInstitute for Carbon Neutrality, University of Science and Technology Beijing, Beijing, 100083, China; Institute of Steel Sustainable Technology, Liaoning Academy of Materials, Shenyang, 110167, Liaoning, ChinaInstitute for Carbon Neutrality, University of Science and Technology Beijing, Beijing, 100083, China; Institute of Steel Sustainable Technology, Liaoning Academy of Materials, Shenyang, 110167, Liaoning, ChinaIn this paper, the influence of decreasing Zr content (0.0110 wt%, 0.0044 wt%) on the microstructure, MnS inclusion characteristics, and mechanical properties of medium carbon ferrite-pearlite steel was studied. The results show that the volume fraction of intragranular ferrite (IGF) in steel increases with a reduction in Zr content. The ductility of the steel is reduced by 1.83%, the impact toughness is increased by 2.5 times, and the yield strength is almost unchanged. Compound MnS inclusions are the main inclusions that induce IGF formation. The proportion of heterogeneous nucleation of MnS inclusions using oxides as nucleation sites is increased, which is the main reason for the increase in the volume fraction of IGF. Furthermore, MnS inclusions change from type Ⅲ to type Ⅰ and Ⅱ, and their distribution is gradually uniform. Thermodynamic analysis reveals that the underlying cause for the morphological transformation of MnS inclusions is the rapid surge in the supersaturation of S element in molten steel. The presence of liquid-phase low-melting inclusions (MnS–Al2O3) promotes the formation of type Ⅰ MnS inclusions. The volume fraction and the dimension perpendicular to the fracture surface of the MnS inclusions are increased by at least 33% and 111%, while their aspect ratio is reduced by a maximum of up to 19%. The change in the volume fraction of MnS inclusions is the primary factor contributing to the decrease of tensile plasticity. The toughness of steel is mainly affected by the aspect ratio and the dimension perpendicular to the fracture surface of MnS inclusions.http://www.sciencedirect.com/science/article/pii/S2238785424023937Zr additionIntragranular ferriteMnS inclusionsImpact toughnessPlasticityAspect ratio |
| spellingShingle | Li Hao Chaolei Zhang Chenxuan Liu Jianlin Sun Wanli Sun Shuize Wang Junheng Gao Honghui Wu Haitao Zhao Xinping Mao Effect of Zr addition on MnS inclusion characteristics and mechanical properties in medium carbon ferrite-pearlite steel Journal of Materials Research and Technology Zr addition Intragranular ferrite MnS inclusions Impact toughness Plasticity Aspect ratio |
| title | Effect of Zr addition on MnS inclusion characteristics and mechanical properties in medium carbon ferrite-pearlite steel |
| title_full | Effect of Zr addition on MnS inclusion characteristics and mechanical properties in medium carbon ferrite-pearlite steel |
| title_fullStr | Effect of Zr addition on MnS inclusion characteristics and mechanical properties in medium carbon ferrite-pearlite steel |
| title_full_unstemmed | Effect of Zr addition on MnS inclusion characteristics and mechanical properties in medium carbon ferrite-pearlite steel |
| title_short | Effect of Zr addition on MnS inclusion characteristics and mechanical properties in medium carbon ferrite-pearlite steel |
| title_sort | effect of zr addition on mns inclusion characteristics and mechanical properties in medium carbon ferrite pearlite steel |
| topic | Zr addition Intragranular ferrite MnS inclusions Impact toughness Plasticity Aspect ratio |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424023937 |
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