圆坯中频电磁软接触连铸结晶器内弯月面波动分析  

Analysis of Meniscus Fluctuation in Mold for Round Billets by IF Soft-Contact Electromagnetic Continuous Casting

作　　者：王朝阳[1] 王恩刚[1] 张兴武[1] 赫冀成[1] 

机构地区：[1]东北大学材料电磁过程研究教育部重点实验室,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2009年第9期1282-1285,1290,共5页Journal of Northeastern University(Natural Science)

基　　金：辽宁省科技攻关计划重大项目(2005221006);辽宁省青年人才基金资助项目(2005221004);高等学校学科创新引智计划项目(B07015)

摘　　要：通过实验的方法测量出不同电参数和工艺参数下圆坯中频电磁软接触连铸结晶器内弯月面不同位置的波动情况.实验结果表明:在中频电磁场的作用下,弯月面的波动明显加剧,弯月面中心处的波动相对于边缘部分波动小;随着功率增加,整个内弯月面区域的波动都会加剧,但中心处的波动加剧程度和幅度都比边缘部位要小;当液位越靠近感应线圈中心高度时波动越剧烈,液位位于线圈中心高度以下比线圈中心高度以上相同位置稳定;随着磁场频率增加,结晶器内弯月面的波动趋于稳定,但波动方差的衰减幅度在减小,综合考虑所选择的频率为2.5 kHz.The fluctuation of the meniscus of molten steel in the mold for round billets produced by the intermediate frequency soft-contact electromagnetic continuous casting process was measured in different positions during tests with different electrical parameters and process parameters. The results showed that the meniscus fluctuates greatly under the action of IF electromagnetic field, while the center of meniscus fluctuates relatively smaller to the margin of meniscus. The whole area of meniscus fluctuates further with increasing electric power, while the fluctuation at the center of meniscus is smaller than that of the margin. It was found that the closer the level of molten steel to the center height of induction coil, the greater the fluctuation of the level, and the level is more stable in a position below the central height in comparison with the level in the similar position above the height. The fluctuation of meniscus in mold tends to be stable with increasing frequency, but its attenuation amplitude of the variance of fluctuation decreases. In an overall view, the frequency 2.5 kHz is chosen as an appropriate one.

关 键 词：波动 方差 中频 电磁软接触 结晶器 磁感应强度 

分 类 号：TG249.7[金属学及工艺—铸造]