ABSTRACT

According to the mould electromagnetic stirring of vertical round billet continuous casting, a three-dimensional mathematical model of electromagnetic field was established to study the distribution of magnetic field in the mould. On the centre cross section of agitator, the distribution of magnetic flux density is small in the centre and large in the edge, in the centre longitudinal section, the maximum value of magnetic flux density at the lower edge of the mould. The influence of electromagnetic parameters on the flow field and temperature field in mould was studied. When the section of round billet is 800 mm, the current intensity is 380 A and the current frequency is 3 Hz, and the proportion of equiaxial crystal is up to 43.6%. The central shrinkage hole, central crack and central porosity are all less than grade 1, and there is no white band, the stirring intensity of M-EMS is relatively ideal.

摘要

针对立式圆坯连铸结晶器电磁搅拌，建立电磁场三维数学模型，研究结晶器内磁场的分布。在搅拌器的中心截面上，磁通密度分布在中心小，在边缘大，在中心纵向截面上，磁通密度在模具下边缘的最大值。研究了电磁参数对模具内流场和温度场的影响。当圆坯截面为800mm时，电流强度为380A，电流频率为3Hz，等轴晶的比例高达43.6%。中心缩孔、中心裂纹、中心气孔均小于1级，无白带，