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The Analysis of Dynamic Pressure in the Molten Flux near the Meniscus during Mold Oscillation for the Continuous Casting of Steel  

Park, Tae-Ho (Dept. of Materials Science and Metallurgy, Kyungpook National University)
Kim, Ji-Hun (Center for Noncrystalline Materials, Department of Metallurgical Engineering Yonsei University)
Choi, Joo (Iron & Steel Making Research Team, Technical Research Laboratories, POSCO)
Ye, Byung-Joon (Dept. of Materials Science and Metallurgy, Kyungpook National University)
Publication Information
Journal of Korea Foundry Society / v.24, no.1, 2004 , pp. 26-33 More about this Journal
Abstract
The pressure of the mold flux acting on the meniscus shell was investigated through the coupling analysis of heat transfer in the mold and fluid flow in the flux caused by the mold oscillation. Finite element method was employed to solve the conservation equation associated with appropriate boundary conditions. As reported by previous workers, the axial pressure is positive on the negative strip time and negative on the positive strip time. A maximum pressure is predicted toward the top of the meniscus shell which has the thin shell arid a maximum value is in proportion to the relative mold oscillation velocity. The relative mold oscillation velocity was changed by the effect of meniscus level fluctuation. Therefore the pressure of the mold flux acting on the meniscus shell was different each cycle of the mold oscillation due to the irregularity of relative mold oscillation velocity.
Keywords
Continuous casting; Oscillation marks; Meniscus shell; Pressure;
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  • Reference
1 I. Saucedo, J. Beech, and G. J. Davies: Metal Tech., 'Influence of meniscus freezing on surface defect formation in cast products', 9 (1982) 282-291   DOI
2 J.J. Bikerman: Phvsical Surfaces, Academic Press, (1970) 12
3 E. Matijevic : Surface and Colloid Science, Wiley-Interscience, 1 (1969) 81
4 H. Tada, S. Nishioka, M. Komatsu and H. Murakami: ISIJ,'Initial stage solidification of steel', (1995) 60
5 G. J. W. Kor: Proc. of 2nd Process Technology Conf. on Continuous Casting of Steel, 'An analysis of the fluid flow of liquid mold powder in the space between the continuous casting mold and the steel shell', 2 (1981) 124-132
6 K. Sorimachi: in Proc. Of Modeling of Casting and Welding ProcessesII, 'Crystallization of mould powder affecting quality of strand cast slabs', (1983) 369-375.
7 M. Wolf: Ironmaking and Steelmaking, 'Strand surface quality of austenitic stainless steels: part I macroscopic shell growth and ferrite distribution', 13 (1986) 248-257
8 M. M. Wolf: Steelmaking conf. Proc., 'Mold oscillation guidelines', 74(1991)51-70
9 K. Schwerdtfeger and H. Sha : Met. Trans., 'Depth of oscillation marks forming in continuous casting of steel', 3IB (2000) 813-826
10 H. Tomono, P. Ackermann, W. Kurz, and W. Heinemann: TMS-AIME, Warrendale, PA, 'Elements of surface mark formation in continuous casting of steel', (1982) 55-73
11 Y. M. Won, T. Yeo, K. H. Oh, 1. Park, J. Choi and C. H. Yim : ISU int., 'Analysis of mold wear during continuous casting of slab', 38(1) (1998) 53-62   DOI   ScienceOn
12 K. Kawakami, T. Kitagawa, H. Mizukami, H. Uchibori, S. Miyahara, M. Suzuki and Y. Shiratani : Tetsu-to-Hagane, 'Fundamental study and its application of surface defects of powder cast strands', 67 (1981) 150-159
13 K. I. Tada, J. P. Birat, P. V. Riboud, M. Larrecq and H. Hackl : Trans. ISIJ, 'Modelling of slag rim formation and pressure in molten flux near the meniscus', 24 (1984) B382
14 RIST: Continuous casting of steel (1991)
15 R. Bommaraju and E. Saad : Steelmaking conf. Proc., 'Mathematical modelling of lubrication capacity of mold fluxes', 73 (1990) 281-296
16 E. Takeuchi and J. K. Brimacombe : Met. Trans., 'Effect of oscillation-mark formation on the surface quality of continuously cast steel slabs', 16B (1985) 605-625
17 H. S. Park : pasco Technical report 'Heat transfer in meniscus zone during casting', 3( I) (1989) 69-76
18 T. Emi, H. Nakato, Y. Iida, K. Emoto, R. Tachibana, T. Imai, and H. Bada : NOH-BOSC, 'Influence of physical and chenical properties of mold powders on the solidification and occurrence of surface defects of strand cast slabs', 61 (1978) 350-361
19 E. Takeuchi and J. K. Brimacombe : Met. Trans., 'The Formation of Oscillation Marks in the Continuous Casting of Steel Slabs', 15B (1984) 493-509
20 B. Ho: Master's Thesis, University of Illinois at UrbanaChampaign, Urbana, IL, (1992)
21 H. Nakato, T. Nozaki, Y. Habu, H. aka, T. Ueda, Y. Kitano and T. Koshikawa : Steelmaking Conf. Proc., 'Improvement of surface quality of continuously cast slabs by high frequency mold oscillation', 68 (1985) 361-365