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| Characterization and Thermodynamics of Al2O3-MnO-SiO2(-MnS) Inclusion Formation in Carbon Steel Billet |
| Guo-cheng WANG1,2,3,Sheng-li LI1,2,Xin-gang AI1,2,Chong-min ZHANG1,2,Chao-bin LAI3 |
1. Key Laboratory of Chemical Metallurgy Engineering, Anshan 114051, Liaoning, China
2. School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, Liaoning, China
3. School of Metallurgical and Chemical Engineering, Jiangxi University of Science and Technology,Ganzhou 341000, Jiangxi, China |
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Abstract A method to extract inclusion particles from solid steel by electrolysis with organic electrolyte solution was introduced; meanwhile, thermodynamics of inclusion formation was calculated using FactSage software. The results showed that there were two kinds of inclusions in the billet, i. e. Al2O3-MnO-SiO2-MnS (AMS-MnS) and Al2O3-MnO-SiO2 (AMS). Most of AMS-MnS inclusion particles, with diameter of 10-30 ��m, showed three-layer structures: SiO2-rich core with a small quantity of Mn, intermediate AMS layer, and MnS outer layer containing small quantities of Al and O. Most AMS inclusion particles were 50-90 ��m and exhibited homogeneous composition. Thermodynamic results indicated that SiO2-rich core could form firstly by Si reacting with O in molten steel at temperatures above 1923 K during Si-Fe alloy addition, and then, the SiO2-rich core could react with Mn and Al to form liquid AMS enveloping the SiO2-rich core at 1823-1873 K. MnS began to precipitate from AMS when temperature reached 1728 K. Liquid AMS could form by coupled reaction among Si, Mn, Al and O in molten steel.
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Received: 25 March 2014
Published: 17 July 2015
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| Fund:National Natural Science Foundation of China; Foundation from the Liaoning Province Education Department;Foundation from the Liaoning Province Education Department |
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Corresponding Authors:
Shengli Li
E-mail: lishengli@ustl.edu.cn
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| [2] |
ZHANG Xue- wei,ZHANG Li- feng,YANG Wen,WANG Yi,DONG Yuan- chi��LI Yang- zhou. Nucleation and growth dynamics analysis of MnS particles during solidification process in heavy rail steels[J]. Chinese Journal of Iron and Steel, 2017, 29(9): 724-731. |
| [3] |
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| [4] |
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| [5] |
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| [6] |
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2015, Vol. 22 
