DOI QR코드

DOI QR Code

Dynamic Bulging Behavior Analysis by Finite Difference Method in High Speed Continuous Casting of Thin Slab

유한 차분법에 의한 Thin Slab 고속 연속주조의 동적벌징 거동해석

  • Published : 2000.07.01

Abstract

Continuous casting process has been adopted increasingly in recent years to save both energy and labor. It has experienced a rapid development in the production of semi-finished steel products, rep lacing the conventional route of ingot casting and rolling. In order to achieve this merit, however, more studies about the mechanism between roll and slab are needed. In this paper, a dynamic bulging in steel cast slabs was simulated by considering the solidification and heat transfer. This study is to prevent internal cracks of a slab in a bending and unbending zone. The value of moving strand shell bulging between two supporting rollers under the ferrostatic pressure and slab-self weight has been calculated in terms of creep and elasto-plasticity. The strain and strain rate distributions in solidified shell undergoing a series of bulging are calculated with working boundary conditions.

Keywords

Internal Crack;Dynamic Bulging;High Speed Continuous Casting;Creep

References

  1. Sorimachi, K., Emi, T., 1977, 'Elasto-plastic Stress Analysis of Bulging as a Major Cause of Internal Cracks in Continuously Cast Slabs,' J. Iron and Steel Ins., Vol. 63, No. 8, pp. 1297-1304
  2. Wunnenberg, K. and Flender, R., 1985, 'Investigation of Internal Crack Formation in Continuous Casting Using a Hot Model,' Ironmaking Steelmaking, Vol. 12, No. 1
  3. Matsumiya, T., Ito, M., Kajioka, H., 1986, 'An Evaluation of Critical Strain for internal Crack Formation in Continuously Cast Slabs,' ISIJ, Vol. 26, pp. 542-546
  4. Kodama, H., Niyama, E. and Enso, M., 1984, 'Effects of Compressive Stress on Internal Crack Formation of Continuously cast Slabs,' ISIJ, Vol. 24, pp. 396-400
  5. Private Communication with POSCO
  6. Misaka Y., YOSHIM, T. and OTO, 1967, 'Formulations Mean Resistance to Deformation for Plain Carbon Steels at Elevated Temperature,' J. JSTP, Vol. 8 No.79, pp. 414-422
  7. Inouye, K., 1968, 'Studies on Hot Working Strength of Steel,' J. Iron and Steel Ins., Vol. 41, No. 6, pp. 593-601
  8. Fukumi J., 1984, 'Application of Mist Spray on Fukuyama No. 4 Slab Caster,' Tetsu-to Hagane, Vol. 70, No. 2, S993
  9. Savage, J. and Pitchard, W. H., 1954, J. Iron and Steel Ins., Nov., pp. 269-277
  10. Mitsutsuka, M., 1968, 'Study on the Water Spray Cooling Plate at High Temperature,' J. Iron and Steel Ins., Vol. 54, No. 14, pp. 1457-1471
  11. Barber, B., Lewis, B. A. and Leckenby, B. M., 1985, 'Finite Element Analysis of Strand Deformation and Strain Deformation and Strain Distribution on Solidifying Shell during Continuous,' Ironmaking Steelmaking. Vol. 12, No. 4, pp. 171-175
  12. EI-Bealy, M., Leskinen, N. and Fredriksson, H., 1995,'Simulation of Cooling Conditions in Secondary Cooling Zones in Continuous Casting process,' Ironmaking Steelmaking, Vol. 22, No. 3, pp. 246-255
  13. Tacke, K. H., 1985, 'Multi-Beam Model of Strand Straightening in Continuous Casting,' Ironmaking Steelmaking, Vol. 12, No. 2, pp. 147-154
  14. Fukawa, K., Matsumoto, H. and Nakajima, K., 1982, 'Rheological Analysis of Bulging of Continuously Cast Slabs with Elementary Bending Theory,' J. Iron and Steel Ins., Vol. 12, No. 7, pp. 86-90
  15. Wada, Y., Ito Y. and Nagano, H., 1985, 'Mechanics Related Behavior in Continuous Casting,' Ed. by Comm. on Mechanics Related Behavior in Continuous Casting, The Joint Soc. Iron Steel Basic Res., ISIJ, Tokyo, pp. 124-127
  16. Okamura K. and Kawashima, H., 1989, 'Three-dimensional Elasto-plastic and Creep Analysis of Bulging in Continuously Cast Slabs,' ISIJ, pp. 91-98
  17. Kang, C. G. and Yun, K. S., 1988, 'An Analysis of Deformation Behavior on Dynamic Bulging in the High Speed Continuous Casting,' J. KSME, Vol. 12, No. 6, pp. 1217-1226
  18. Palmers, A., Etinne, A. and Mignon, J., 1979, 'Calculation of the Mechanical and Thermal stresses in Continuously Cast Strands,' Stahl U. Eisen, pp. 1039-1050
  19. Miyazaya, K. and Schwerdtfeger, K., 1974, 'Computation of Bulging of Continuously Cast Slabs with Simple Bending Theory,' Ironmaking Steelmaking, No. 2, pp. 68-74
  20. Uehara, M., Samarasekera, I., and Brimacombe, J. K., 1986, 'Mathematical Modeling of Unbending of Continuously Cast Steel Slabs,' Ironmaking Steelmaking, Vol. 13, No. 3, pp. 138-153