Study on Joule Heat of Molten Steel in Soft-contact Billet Mold
Based on the theory of electromagnetics 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.