论文部分内容阅读
通过双向迭代耦合的方法,建立了电磁连铸结晶器区域内的传热凝固有限元分析模型.通过对凝固坯壳与结晶器接触状态的数学描述,来模拟软接触结晶器内的热和力学状态,研究了高频交变电磁场对气隙分布及铸坯温度场的作用规律.结果表明,采用双向迭代耦合的方法,可更准确地描述电磁软接触连铸结晶器内的热-力学行为;高频交变磁场下,钢液的初始凝固点位置较常规连铸下移,初始凝固壳减薄,气隙生长延迟;在结晶器下段,由于电磁力的搅拌作用凝壳厚度又有所增加,气隙量大于常规连铸.
By means of bidirectional iterative coupling method, the finite element model of heat and solidification in the area of electromagnetic continuous casting mold was established. By means of the mathematical description of the contact state between the solidified shell and the mold, the heat and mechanics in soft contact mold State and the effect of high frequency alternating electromagnetic field on the distribution of air gap and the temperature field of slab are studied.The results show that the thermo-mechanical behavior in electromagnetic soft contact continuous casting mold can be more accurately described by the method of bidirectional iterative coupling In the high frequency alternating magnetic field, the initial solidification point of the molten steel moves downward compared with the conventional continuous casting, the initial solidified shell is thinned and the airgap growth is delayed. In the lower part of the mold, the thickness of the condensed shell increases due to the agitation of electromagnetic force , The air gap is larger than the conventional continuous casting.