High frequency magnetic field distribution in region of initial solidification within soft contact electromagnetic continuous casting mold of billet

Experimental measurements and numerical analysis have been conducted to clarify the high frequency magnetic field distribution in the region of initial solidification within the soft contact EMCC (electromagnetic continuous casting) mold of billet. The effects of the divided types of EMCC mold, molten metal meniscus levels and coil turns on the distribution of magnetic field were investigated. The results show that the penetration of high frequency magnetic field in EMCC mold with open slit type is higher then that with closed slit type. By increasing the coil turns the effective range of magnetic field in the region of initial solidification increases. The molten metal meniscus level within the EMCC mold plays an important role on the surface quality of cast billets. When the meniscus level nears to the coil top the effective range of the magnetic filed becomes larger and the magnetic field distribution becomes uniform in the region of initial solidification of billet, which is helpful to improve the billet surface quality. On the base of the experiment and numerical study, the casting experiments for soft contact EMCC were carried out and the billets of Sn-10Pb alloy with high surface quality were obtained under high frequency magnetic filed with optimum operating parameters.