摘要
通过模拟连铸末端金属凝固的实验条件，考察施加电磁场时金属熔体内部温度场的变化情况， 在Ｌｏｒｅｎｔｚ力作用下，熔体的温度分布更趋均匀；温度场的变化导致凝固速率发生改变，与未施加电磁场相比较，开始阶段的凝固速率变小，凝固末期的凝固速率增大；提出特征固相率的概念，Ｌｏｒｅｎｔｚ力加速了低于某一粘度金属熔体的热、质传输过程。
Through simulated situation of finial stage of continuous casting, temperature field of molten metal changed by imposing electromagnetic field was researched. Lorentz force made temper- ature distribution even uniformly, and also changed solidification velocity. Compared with situation without imposing electromagnetic field, solidification velocity became smaller at the beginning stage, and bigger at the last stage of solidification process. The concept of characteristic solid-phase ratio was brought forward, Lorentz force accelerated heat and mass transport of molten metal which viscos- ity was under a certain value, it embodied that the electromagnetic field increases the characteristic solid-phase ratio of molten metal.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2001年第9期971-974,共4页
Acta Metallurgica Sinica
基金
上海宝钢集团公司
国家自然科学重大项目基金59995442
国家重大基础研究基金 G1998061500资助项目
关键词
电磁搅拌
温度场
传质
传热
连铸
凝固
continuous casting, electromagnetic stirring, temperature field, heat and mass transport
