Abstract
In the current study, two significant phenomena involved in heavy steel ingot casting, i.e., species transport and macrosegregation, were numerically simulated. First, a ladle–tundish–mold species transport model describing the entire multiple pouring process of heavy steel ingots was proposed. Carbon distribution and variation in both the tundish and the mold of a 292-ton steel ingot were predicted. Results indicate high carbon concentration in the bottom of the mold while low concentration carbon at the top of mold after the pouring process. Such concentration distribution helps in reducing both negative segregation in the bottom of the solidified ingot and positive segregation at the top. Second, a two-phase multiscale macrosegregation model was used to simulate the solidification process of industrial steel ingots. This model takes into account heat transfer, fluid flow, solute transport, and equiaxed grain motion on a system scale, as well as grain nucleation and growth on a microscopic scale. The model was first used to analyze a three-dimensional industry-scale steel ingot as a benchmark. Then, it was applied to study macrosegregation formation in a 53-ton steel ingot. Macrosegregation predicted by the numerical model was presented and compared with experimental measurements. Typical macrosegregation patterns in heavy steel ingots are found to be well reproduced with the two-phase model.
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B.C. Liu, Q.Y. Xu, T. Jing, H.F. Shen, and Z.Q. Han: JOM, 2011, vol. 63, pp. 19–25.
Y. Tanaka and I. Sato: J. Nucl. Mater., 2011, vol. 417, pp. 854–59.
M.C. Flemings: ISIJ Int., 2000, vol. 40, pp. 833–41.
C. Beckermann: Int. Mater. Rev., 2002, vol. 47, pp. 243–61.
G. Lesoult: Mater. Sci. Eng. A, 2005, vols. 413–414A, pp. 19–29.
J. Ni and C. Beckermann: Metall. Trans. B, 1991, vol. 22B, pp. 349–61.
C.Y. Wang and C. Beckermann: Metall. Mater. Trans. A, 1996, vol. 27A, pp. 2754–64.
M. Wu and A. Ludwig: Metall. Mater. Trans. A, 2006, vol. 37A, pp. 1613–31.
M. Wu and A. Ludwig: Metall. Mater. Trans. A, 2007, vol. 38A, pp. 1465–75.
M. Wu and A. Ludwig: Acta Mater., 2009, vol. 57, pp. 5621–31.
M. Wu, A. Fjeld, and A. Ludwig: Comput. Mater. Sci., 2010, vol. 50, pp. 32–42.
H. Combeau, M. Zaloznik, S. Hans, and P.E. Richy: Metall. Mater. Trans. B, 2009, vol. 40B, pp. 289–304.
M. Zaloznik and H. Combeau: in Modeling of Casting, Welding and Advanced Solidification Processes—XII, S.L. Cockroft and D.M. Maijer, eds., TMS, Warrendale, PA, 2009, pp. 165–72.
H. Combeau, A. Kumar, and M. Zaloznik: Trans. Indian Inst. Met., 2009, vol. 62, pp. 285–90.
A.Kumar, M. Zaloznik, and H. Combeau: Int. J. Adv. Eng. Sci. Appl. Math., 2010, vol. 2, pp. 140–48.
H. Combeau, A. Kumar, M. Zaloznik, I. Poitrault, G. Lacagne, A. Gingell, T. Mazet, and G. Lesoult: in 1st International Conference on Ingot Casting, Rolling and Forging, Aachen, Germany, 2012.
X. Zhang: Master’s Thesis, Tsinghua University, Beijing, P.R. China, 2012.
W.S. Li, H.F. Shen, and B.C. Liu: Int. J. Miner. Metall. Mater., 2012, vol. 19, pp. 787–94.
W.S. Li: Ph.D. Thesis, Tsinghua University, Beijing, P.R. China, 2012.
W.S. Li, B.Z. Shen, H.F. Shen, and B.C. Liu: IOP Conf. Ser.: Mater. Sci. Eng., 2012, vol. 33, p. 012090.
W.S. Li, H.F. Shen, and B.C. Liu: Steel Res. Int., 2010, vol. 81, pp. 994–1000.
M. Zaloznik and H. Combeau: Int. J. Therm. Sci., 2010, vol. 49, pp. 1500–09.
J. Li, M. Wu, J. Hao, A. Kharicha, and A. Ludwig: Comput. Mater. Sci., 2012, vol. 55, pp. 419–29.
Acknowledgments
This study was financially supported by the National Basic Research Program of China under Grant No. 2011CB012900 and the National Science and Technology Major Project of the Ministry of Science and Technology of China under Grant No. 2012ZX04012011. The cooperation and the assistance of personnel, especially by Dr. Bingzhen Shen of CITIC Heavy Industries Co., Ltd., Luoyang, P.R. China during the plant trials, are gratefully acknowledged.
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Manuscript submitted January 26, 2013.
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Li, W., Shen, H., Zhang, X. et al. Modeling of Species Transport and Macrosegregation in Heavy Steel Ingots. Metall Mater Trans B 45, 464–471 (2014). https://doi.org/10.1007/s11663-013-9862-4
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DOI: https://doi.org/10.1007/s11663-013-9862-4