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建立了描述实验条件下反向凝固器中的相变传热过程的一维数学模型,计算结果与实验数据基本吻合.分析了反向凝固器内传热特点,并讨论了母带厚度、钢液过热度等操作参数和凝固率模型、热物性参数等模型参数对新生相生长的影响.认为凝固器内的停留时间是影响新生相生长的关键因素.为了防止母带熔断,停留时间不能超过一极限值.同时,凝固率模型和热物性参数对新生相生长的影响不可忽略.
A one-dimensional mathematical model describing the phase transformation heat transfer in the reverse coagulator under experimental conditions was established. The calculated results are in good agreement with the experimental data. The characteristics of heat transfer in the reverse coagulator were analyzed. The effects of operating parameters, solidification rate and thermal parameters on the growth of new phase were discussed. It is considered that the residence time in the coagulator is the key factor that affects the growth of the new phase. In order to prevent the master blown, dwell time can not exceed a limit. At the same time, the influence of the solidification rate model and thermophysical parameters on the growth of new phase can not be neglected.