Thermodynamics on compositional design of slag for the Ti content control in bearing steel
The control of low Ti content is vital to reducing the adverse effects of TiN inclusions on fatigue life of bearing steel. Compared with the strict Ti content control of raw materials, the Ti content control by interaction between refining slag and bearing steel costs less. The effect of interaction...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-09-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423016836 |
| _version_ | 1797646779662991360 |
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| author | Pengzhao Zhang Guangqiang Li Chengyi Zhu Zhicheng Zhang Yu Liu |
| author_facet | Pengzhao Zhang Guangqiang Li Chengyi Zhu Zhicheng Zhang Yu Liu |
| author_sort | Pengzhao Zhang |
| collection | DOAJ |
| description | The control of low Ti content is vital to reducing the adverse effects of TiN inclusions on fatigue life of bearing steel. Compared with the strict Ti content control of raw materials, the Ti content control by interaction between refining slag and bearing steel costs less. The effect of interaction between slag and steel on the Ti content of bearing steel was explored by equilibrium tests and the thermodynamic calculation based on the ion and molecule coexistence theory. The results show that the driving force for the reaction of the Ti and Al in steel and the SiO2 in slag increases with the decrease of the slag basicity, but the driving force for the reduction of TiO2 in slag by Al in steel also increases. Therefore, low Ti content in bearing steel can be obtained by appropriately reducing the basicity and TiO2 content of refining slag and Al content in steel, and properly increasing the Al2O3 content in the slag. For the compositional design of CaO–SiO2–Al2O3-0.1wt%TiO2-1wt%MgO refining slag used for low Ti bearing steel, the slag basicity should be less than 2 and Al2O3 content is 30–50%, or the slag basicity is 3 and Al2O3 content is decreased to 30-40wt%. |
| first_indexed | 2024-03-11T15:06:47Z |
| format | Article |
| id | doaj.art-5452094106d24b8a8a85822b7088f39f |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-11T15:06:47Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-5452094106d24b8a8a85822b7088f39f2023-10-30T06:02:36ZengElsevierJournal of Materials Research and Technology2238-78542023-09-01268898Thermodynamics on compositional design of slag for the Ti content control in bearing steelPengzhao Zhang0Guangqiang Li1Chengyi Zhu2Zhicheng Zhang3Yu Liu4The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, Hubei 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, Hubei 430081, ChinaKey Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan, Hubei 430081, ChinaDaye Special Steel Co., Ltd, Huangshi, Hubei 435001, ChinaThe State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, Hubei 430081, China; Corresponding author.The control of low Ti content is vital to reducing the adverse effects of TiN inclusions on fatigue life of bearing steel. Compared with the strict Ti content control of raw materials, the Ti content control by interaction between refining slag and bearing steel costs less. The effect of interaction between slag and steel on the Ti content of bearing steel was explored by equilibrium tests and the thermodynamic calculation based on the ion and molecule coexistence theory. The results show that the driving force for the reaction of the Ti and Al in steel and the SiO2 in slag increases with the decrease of the slag basicity, but the driving force for the reduction of TiO2 in slag by Al in steel also increases. Therefore, low Ti content in bearing steel can be obtained by appropriately reducing the basicity and TiO2 content of refining slag and Al content in steel, and properly increasing the Al2O3 content in the slag. For the compositional design of CaO–SiO2–Al2O3-0.1wt%TiO2-1wt%MgO refining slag used for low Ti bearing steel, the slag basicity should be less than 2 and Al2O3 content is 30–50%, or the slag basicity is 3 and Al2O3 content is decreased to 30-40wt%.http://www.sciencedirect.com/science/article/pii/S2238785423016836Bearing steelTi contentSlagSlag-steel interactionThermodynamics |
| spellingShingle | Pengzhao Zhang Guangqiang Li Chengyi Zhu Zhicheng Zhang Yu Liu Thermodynamics on compositional design of slag for the Ti content control in bearing steel Journal of Materials Research and Technology Bearing steel Ti content Slag Slag-steel interaction Thermodynamics |
| title | Thermodynamics on compositional design of slag for the Ti content control in bearing steel |
| title_full | Thermodynamics on compositional design of slag for the Ti content control in bearing steel |
| title_fullStr | Thermodynamics on compositional design of slag for the Ti content control in bearing steel |
| title_full_unstemmed | Thermodynamics on compositional design of slag for the Ti content control in bearing steel |
| title_short | Thermodynamics on compositional design of slag for the Ti content control in bearing steel |
| title_sort | thermodynamics on compositional design of slag for the ti content control in bearing steel |
| topic | Bearing steel Ti content Slag Slag-steel interaction Thermodynamics |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423016836 |
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