Analysis of the heat transfer coefficients of the whole process of continuous casting of carbon steel
In this work, we use a numerical–experimental approach which is based on the solution of the inverse heat conduction problem (IHCP) and temperature measurements. To obtain the profile of the heat transfer coefficients for all stages of the industrial manufacture of continuous casting process, we evaluate the three cooling regions. At primary ones, we use the temperature measured at the wall of the mold by thermocouples and the surface temperature of the ingot in the secondary and tertiary regions by optical pyrometers placed at the strategic positions. The IHCP procedure analysis the behavior of the numerical heat transfer coefficient under several conditions, such as casting temperature and speed as well as the chemical composition of the steel. We also propose a correlation to evaluate the overall heat transfer coefficient profile as function of the investigated parameters.
KeywordsContinuous casting Heat transfer coefficient Numerical–experimental approach Ingot solidification
Paulo Vicente de Cassia Lima Pimenta would like to thank CAPES (Coordination for the Improvement of Higher Education Personnel and Gerdau Cearense) for financial support of this work.
- 8.Brimacombe JK, Samarasekera IV (1994) The challenge of thin slab casting. Iron Steelmak 21(11):29–39Google Scholar
- 9.Mizikar EA (1970) Spray-cooling investigation for continuous casting of billets and blooms. Iron Steel Eng 47(6):53–60Google Scholar
- 13.Garcia A, Prates M (1983) The application of a mathematical model to analyze ingot thermal behavior during continuous casting. In: Proceedings of the fourth IFAC symposium, vol 16, no 15. Helsinki, Finland, pp 273–279Google Scholar
- 14.Hills AW (1965) Simplified theoretical treatment for transfer of heat in continuous-casting machine moulds. J Iron Steel Inst 203:18Google Scholar
- 22.Maliska CR (2004) Heat transfer and computational fluid mechanics, Florianópolis, 2ª edn. Editora LTC. (In Portuguese)Google Scholar
- 23.Patankar SV. Numerical heat transfer and fluid flow: computational methods in mechanics and thermal scienceGoogle Scholar
- 29.Garcia A (2001) Solidificação: Fundamentos e Aplicações, editora da Unicamp. São Paulo, Brasil, pp 201–242Google Scholar
- 31.Monrad, Pelton, Gnielinski and Florenko (2003) Cia Europa Metalli, Manual Técnico v. único, pp 44–65Google Scholar
- 32.Bolle E, Moureau JC (1946) Sprays cooling of hot surfaces: a description of the dispersed phase and a parametric study of heat transfer results. Proc Two Phase Flows Heat Transf 101:1327–1346Google Scholar
- 33.Brimacombe JK, Samarasekera IV, Lait JE (1984) Continuous casting: heat flow, solidification and crack formation., vol 2. Iron and Steel Society of AIMEGoogle Scholar
- 34.Mahapatra RB, Brimacombe JK, Samarasekera IV (1991) Mold behavior and its influence on quality in the continuous casting of steel slabs: part II. Mold heat transfer, mold flux behavior, formation of oscillation marks, longitudinal off-corner depressions, and subsurface cracks. Metall Trans B 22(6):875–888CrossRefGoogle Scholar
- 36.Grill A, Brimacombe JK, Weinberg F (1976) Mathematical analysis of stresses in continuous casting of steel. Ironmak Steelmak 3(1):38–47Google Scholar