| Cite this article as: |
Yu-kun Huo, Li-hua Zhao, Hang-hang An, Min Wang, and Chang-dong Zou, Model prediction of the effect of in-mold electromagnetic stirring on negative segregation under bloom surface, Int. J. Miner. Metall. Mater., 27(2020), No. 3, pp. 319-327. https://doi.org/10.1007/s12613-019-1906-6
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Li-hua Zhao E-mail: zhaolihua@metall.ustb.edu.cn
Aiming at the problem of negative segregation under a bloom surface, a coupling macrosegregation model considering electromagnetic field, flow, heat, and solute transport was established based on the volume average method to study the effect of in-mold electromagnetic stirring (M-EMS) on the negative segregation under the bloom surface. In the model, the influence of dendrite structure on the flow and solute transport was described by the change of permeability. The model was validated by the magnetic induction intensity of M-EMS and carbon segregation experiment. The results show that the solute C in the solidified shell in the turbulent zone of the bloom undergoes two negative segregations, whereby the first is caused by nozzle jet, and the second by the M-EMS. The severities of the negative segregation caused by M-EMS at different currents and frequencies are also different, and the larger the current is, or the smaller the frequency is, the more serious will be the negative segregation. With the M-EMS, the solute C distribution in the liquid phase of the bloom is more uniform, but the mass fraction of C in the liquid phase is higher than that without M-EMS.
| [1] |
H.J. Wu, N. Wei, Y.P. Bao, G.X. Wang, C.P. Xiao, and J.J. Liu, Effect of M-EMS on the solidification structure of a steel billet, Int. J. Miner. Metall. Mater., 18(2011), No. 2, p. 159. doi: 10.1007/s12613-011-0416-y
|
| [2] |
H.H. An, Y.P. Bao, M. Wang, and L.H. Zhao, Effects of electromagnetic stirring on fluid flow and temperature distribution in billet continuous casting mould and solidification structure of 55SiCr, Metall. Res. Technol., 115(2017), No. 1, p. 103.
|
| [3] |
P. Fei, Y. Min, C.J. Liu, and M.F. Jiang, Effect of continuous casting speed on mold surface flow and the related near-surface distribution of non-metallic inclusions, Int. J. Miner. Metall. Mater., 26(2019), No. 2, p. 186. doi: 10.1007/s12613-019-1723-y
|
| [4] |
H.H. An, Y.P. Bao, M. Wang, and Q. Yang, Electromagnetic torque detecting for optimization of in-mould electromagnetic stirring in the billet and bloom continuous casting, Ironmaking Steelmaking, 46(2019), No. 9, p. 845. doi: 10.1080/03019233.2018.1522755
|
| [5] |
H.B. Sun, L.J. Li, X.X. Wu, and D.X. Ye, Control of segregation and hardenability band width by optimizing M-EMS parameters for gear steel, Iron Steel, 53(2018), No. 8, p. 55.
|
| [6] |
H.C. Yan, Effect of electromagnetic stirring on hardenability of gearing steel, Met. Mater. Metall. Eng., 43(2015), No. 5, p. 34.
|
| [7] |
H.B. Sun and J.Q. Zhang, Study on the macrosegregation behavior for the bloom continuous casting: Model development and validation, Metall. Mater. Trans. B, 45(2014), No. 3, p. 1133.
|
| [8] |
D.B. Jiang and M.Y. Zhu, Solidification structure and macrosegregation of billet continuous casting process with dual electromagnetic stirrings in mold and final stage of solidification: A numerical study, Metall. Mater. Trans. B, 47(2016), No. 6, p. 3446. doi: 10.1007/s11663-016-0772-0
|
| [9] |
K. Sasaki, Y. Sugitani, S. Kobayashi, and S. Ishimura, The effect of fluid flow on the formation of the negative segregation znoe in steel ingots, Tetsu-to-Hagané, 65(1979), No. 1, p. 60. doi: 10.2355/tetsutohagane1955.65.1_60
|
| [10] |
G.J.W. Kor, Influence of circumferential electromagnetic stirring on macrosegregation in steel, Steelmaking Conference, 66(1983), p. 133.
|
| [11] |
M.R. Bridge and G.D. Rogers, Structural effects and band segregate formation during the electromagnetic stirring of strand-cast steel, Metall. Mater. Trans. B, 15(1984), No. 3, p. 581. doi: 10.1007/BF02657390
|
| [12] |
R. Wang, Y.P. Bao, Y.H. Li, and H.H. An, Optimization of strand and final electromagnetic stirrers of round bloom casters with multiple sections, Int. J. Miner. Metall. Mater., 23(2016), No. 10, p. 1150. doi: 10.1007/s12613-016-1334-9
|
| [13] |
C.J. Zhang, Y.P. Bao, M. Wang, and L.C. Zhang, Teeming stream protection using an argon shroud during casting of steel ingots, Int. J. Miner. Metall. Mater., 24(2017), No. 1, p. 47. doi: 10.1007/s12613-017-1377-6
|
| [14] |
H.H. An, Y.P. Bao, M. Wang, Q. Yang, and Y.S. Huang, Improvement of centre segregation in continuous casting bloom and the resulting carbide homogeneity in bearing steel GCr15, Ironmaking Steelmaking, 46(2019), No. 9, p. 896. doi: 10.1080/03019233.2019.1604614
|
| [15] |
M.J. Cho, E.B. Park, and S.W. Kim, Shield for improving wavy meniscus in the billet continuous casting mold with electromagnetic stirring, ISIJ Int., 50(2010), No. 8, p. 1180. doi: 10.2355/isijinternational.50.1180
|
| [16] |
K.S. Oh and Y.W. Chang, Macrosegregation behavior in continuously cast high carbon steel blooms and billets at the final stage of solidification in combination stirring, ISIJ Int., 35(1995), No. 7, p. 866. doi: 10.2355/isijinternational.35.866
|
| [17] |
Q.P. Dong, J.M. Zhang, Y.B. Yin, and B. Wang, Three-dimensional numerical modeling of macrosegregation in continuously cast billets, Metals, 7(2017), No. 6, p. 209.
|
| [18] |
Q.P. Dong, J.M. Zhang, Q. Liang, and Y.B. Yin, Numerical modeling of macrosegregation in round billet with different microsegregation models, ISIJ Int., 57(2017), No. 5, p. 814. doi: 10.2355/isijinternational.ISIJINT-2016-659
|
| [19] |
Q. Fang, H.W. Ni, B. Wang, H. Zhang, and F. Ye, Effects of EMS induced flow on solidification and solute transport in bloom mold, Metals, 7(2017), No. 3, p. 72. doi: 10.3390/met7030072
|
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