方坯软接触结晶器内钢液焦耳热场研究  

Study on Joule Heat of Molten Steel in Soft-contact Billet Mold

作　　者：王杏娟[1] 刘然[1] 朱立光[1] 贾相明[1] 

机构地区：[1]河北联合大学冶金与能源学院,河北省现代冶金技术重点实验室,河北唐山063009

出　　处：《铸造技术》2013年第7期885-888,共4页Foundry Technology

基　　金：国家自然科学基金资助项目(51074063)

摘　　要：基于电磁学和传热学理论,针对结晶器内钢液,建立方坯软接触电磁连铸结晶器内电磁场和温度场的数学模型,利用有限元软件模拟了结晶器内钢液的电磁场和焦耳热场。结果发现:电源频率为20 kHz,电流强度为640 A时,结晶器内钢液外表面因感应生成一定量的焦耳热,形成厚度约10 mm"集肤层"。焦耳热随电源频率增加而增大,频率高于40 kHz后增幅减小,但焦耳热随电流强度增加呈正比例增大关系。Based on the theory ofelectromagnetics and heat transfer, a three demensional finite element modle of molten steel magnetic field and temperature field were developed to investigate the joule heat distribution rule for molten steel in soft-contact billet mold. The results showed that a certain amount of joule heat existed in molten steel external surface, the skin layer thickness was about 10 mm （20 kHz, 640 A）. The joule heat increased with power frequency increased, and the growing rate decreased when power frequency higher than 40 kHz, but the joule heat was being scaled up with current intensity increased.

关 键 词：软接触 钢液 焦耳热 电源频率 电流强度 

分 类 号：TF777[冶金工程—钢铁冶金]