反向凝固条件下二元合金一维相变传热的研究

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热特点，并讨论了母带厚度、钢液过渡度等操作参数和凝因率模型，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。

INVESTIGATION OF 1-D HEAT TRANSFER WITH PHASE TRANSFORMATION FOR BINERY ALLOY IN CRYSTALLIZOR OF INVERSE CASTING

A one-dimensional continuum model has been developed to describe heat transfer with phase transformation under experimental condition in a crystallizor of inverse casting. The numerical results are proved to be basically agreement with the experimental data. The effects of some main parameters on the solidification behavior have been studied, including operation parameters such as the thickness of mother sheet, the superheat degree of liquid steel and model parameters such as solidification model, thermophysical parameters. The study shows that the residence time is the key parameter having effects on the growth of the new phase and in order to prevent mother sheet from melting down, the residence time shouldn't be longer than a limit value. The effects of solidification model and thermophysical parameters on the formation of the new phase can't be omitted.