液穴形状及铸锭表面质量随磁场强度的变化规律  

Evolutions of Sump Shape and Ingot Surface Quality of Al-7075 Alloy Manufactured Under Electromagnetic Field with Different Intensity

作　　者：张勤 崔建忠[1] 路贵民[1] 张北江[1] 

机构地区：[1]东北大学材料电磁过程教育部重点实验室,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2002年第7期671-674,共4页Journal of Northeastern University(Natural Science)

基　　金：国家重点基础研究发展规划项目 (G19990 64 90 5 0 1)

摘　　要：CREM法半连铸 70 75铝合金过程中 ,对不同强度低频交变电磁场作用下 ,液穴形状 ,即熔体弯液面形状、熔体与结晶器接触高度、初凝壳形成位置点以及液穴深度的变化规律进行了实验研究·结果表明 ,随着磁场强度的增大 ,弯液面曲率半径及熔体与结晶器接触高度减小、初凝壳形成位置点降低、液穴深度也随之相应减小 。The surface meniscus, the contact height between melt and mold, the forming position of initial solidified shell as well as sump height height were experimentally investigated on 7075 alloy produced by CREM process with an electromagnetic field with low frequency. The results show that the curvature of surface meniscus and the contact height between melt and mold decreases with the increasing intensity of the electromagnetic field. The sump height decrease accordingly as the result of the forming position of primary solidified shell becoming lower,in the meantime,the quality of surface aspects is also greatly improved.

关 键 词：CREM法 半连续铸造 铝合金 液穴形状 表面质量 

分 类 号：TG292[金属学及工艺—铸造]