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摘要
In the current paper, A mathematical model of heat transfer and solidification during slab continuous casting of steels was developed, which can be used for reducing centerline macro segregation in the steel slabs by simulating and improving the uniformity of cooling intensity in the transverse direction. The model features a detailed treatment of boundary conditions in both width direction and casting direction, including the effects of non-uniform distribution of spray water in the transverse direction, lower cooling efficiency on the outer radius surface, different kinds of spray nozzles used, varied cooling styles at different locations, and the gap in the casting mold, with which the model can predict the 3-D shape of slab solid shell. The predictions indicate that, distribution of cooling intensity in the transverse direction greatly affects the shape of the liquid-core at the solidification end: due to the unsuitable cooling system, the transverse temperature distribution is non-uniform, and the solidification end is irregular and much longer, which is bad for the application of dynamic soft reduction technology and would lead to serious partial centerline macro segregation and crack in the slab. The nozzle collocation of the caster was optimized according to the study, which results in better steel quality in centerline macro segregation.
- 出版日期2011
- 单位重庆大学
