哈兹列特连铸机结晶器中漏磁行为及有限元分析

摘要

哈兹列特连铸机结晶器中带鳍支撑辊具有强磁性的目的是吸附钢带,保持钢带在铸造过程中的平整,但磁场透过钢带在结晶器内部产生的"漏磁"将导致连铸过程流场紊乱,严重影响后期的板带质量.利用矢量合成法测量磁场,并通过有限元模拟及磁流耦合分析,揭示结晶器中磁场的分布规律与铝熔体流动的电磁制动过程,进一步探究连铸生产过程中熔体紊流可能导致的铸板坯表面质量问题,为优化磁场、改善产品组织提供指导.%The high magnetic property of support roll in Hazelett Continuous casting mold was desired to absorb the steel strip and maintain the smooth of steel strip in the casting process. But a "magnetic flux leakage" produced in the mold leads to the disorder of the flow field in continuous casting process and which has a bad effect on the quality of the late plate. A vector synthesis method of measuring magnetic field was used. By the finite element simulation and magnetohydrodynamic (MHD) analysis, the distribution of magnetic field in the crystallizer and electromagnetic braking process was revealed, which further provides guidance to optimize magnetic field and improves product structure. Finally, surface quality defect of casting blanks caused by the disorder of the flow field was explored.