FLUCTUATED COOLING CONDITIONS AND SOLID SHELL RESISTANCE IN CONTINUOUSLY CAST STEEL SLABS

Mathematical models have been coupled and applied to evaluate the fluc tuated cooling conditions and to determine heal flow and solid shell r esistance of continuously cast steel slabs. Comparisons with previous surface temperature measurements verify the predictions of the heal fl ow model. The effects of the changes in the cooling conditions, castin g speeds and various isotherms on the neutral axis of effective solid shell and the solid shell resistance I,were examined and discussed. Th e model predictions indicate that parameters affecting the solid shell resistance are the effective solid shell thickness and its temperatur e gradient distribution. The results illustrate that the solid shell r esistance decreases with increasing in the reheating of slab surface a nd increases with increasing in the cooling surface. Also, the results point out that the surface temperature profile has a significant effe ct on the solid shell resistance with the distance from the meniscus. Furthermore, the results indicate that the solid shell resistance vari es between pairs of rolls. Published by Elsevier Science Ltd.