电磁结晶器内钢液面高度变化对电磁力分布的影响  

Influence of Molten Steel Level Variation on Electromagnetic Force Distribution in Electromagnetic Mold

作　　者：王宏明[1,2] 李桂荣[1] 夏小江[1] 戴起勋[1] 

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013 [2]上海大学材料科学与工程学院,上海200072

出　　处：《应用基础与工程科学学报》2009年第3期470-476,共7页Journal of Basic Science and Engineering

基　　金：江苏省高校自然科学研究计划资助项目(05KJD450043);江苏省高技术研究项目(BE2005026);江苏省自然科学基金(BK2006078)

摘　　要：通过建立软接触电磁结晶器内钢液所受电磁力计算的三维有限元数学模型,模拟分析了结晶器内钢液面高度变化对钢液所受电磁力分布的影响.结果表明:钢液柱侧表面所受电磁力沿高度方向的最大值出现在钢液面以下5—6mm处.当钢液面在线圈中心以上5mm处时,钢液所受电磁力达到最大值.当钢液面高度在线圈中心与线圈高度3/4之间时,钢液柱侧表面所受电磁力沿高度方向上的最大值变化幅度不大;但当钢液面高度高于线圈3/4处对应高度后,随钢液面升高,电磁力大幅度衰减.因此,欲使钢液柱侧面受到的电磁力大且波动小,则结晶器内钢液面高度应控制在线圈中心与线圈高度3/4之间.A three-dimensional mathematical model to present the electromagnetic force of molten steel in soft-contact mold was established by means of the finite element method. The effect of molten steel level variation on the electromagnetic force distribution was investigated through the simulation method. The results show that the maximum of electromagnetic force, which is imposed on the side surface of molten steel column along the height direction, can be found at 5----rmm below the molten steel level. When the molten steel level is higher than the height of coil center by 5mm, the electromagnetic force comes to the maximum. Moreover, the maximum values of electromagnetic force along the height direction are almost equal when the molten steel level is between the center and three-quarter of the coil. Whereas when the molten steel level is higher than the height of the three-quarter of coil, the electromagnetic force falls sharply with the increase of molten steel level. As a result, the molten steel level should be controlled between the center and three-quarter of coil so as to assure that the electromagnetic force is strong enough, especially, the electromagnetic force has little fluctuation.

关 键 词：电磁软接触连铸 钢液面变化 电磁力 三维数值模拟 

分 类 号：TG249.7[金属学及工艺—铸造] TG111.4