关键词: 电磁软接触, 连铸, 结晶器, 温度, 电磁场

Abstract: Aiming at the process of electromagnetic soft-contacting continuous casting, a three-dimensional finite element model of electromagnetic field and temperature field was developed to investigate the influences of power frequency, current intensity, heat flux between casting billet and copper mould and heat conductivity of thermal insulation material on the temperature field. The results showed that in comparison to the conventional continuous casting mold, the wall temperature of copper mold increases under the action of electromagnetic field, and the higher the current intensity and frequency, the higher the peak value of mold wall temperature. The magnitude of heat flux determines directly the temperature distribution of copper mould. The bigger the heat flux, the clearer the heterogeneity of temperature along the mold axis, and the circumferential temperature gradient in mold increases because of material's uncontinuity. The conductivity of filled insulation affects greatly the temperature distribution on the wall of copper mould. When the heat conduction coefficient of insulation is lower, there are two axial temperature peak values which correspond to the two ends of a seam on the wall of copper mould, and they will increase axial temperature gradient of copper mould.