(大连理工大学 铸造工程研究中心， 大连 116024)
摘 要: 根据热顶-电磁铸造的基本思想， 设计了一套适合于制取铝合金扁锭的热顶-电磁成型系统， 用小线圈法测量了系统内的磁场强度，计算了电磁压力分布， 并与普通电磁铸造成型系统的结果进行对比分析； 依据热顶电磁铸造的成型条件， 确定了相关的控制参数； 通过大量的拉坯实验， 探讨了热顶对防止电磁铸造坯易产生表面夹杂缺陷的作用。结果表明： 采用热顶-电磁铸造法不仅可有效去除电磁铸造中因电磁搅拌产生的氧化夹杂，而且使得电磁铸造过程简便而易于控制。
关键字: 铝合金； 电磁铸造； 热顶； 夹杂
（ Research Center of Foundry Engineering,
Dalian University of Technology,
Dalian 116024, China）
Abstract: According to the basic concept of hot-top electromagnetic casting electromagnetic casting, a set of hot-top electromagnetic casting shaping system for Al alloy slab was designed out, the magnetic field strength and distribution in hot-top electromagnetic casting and electromagnetic casting shaping system was measured by little coil method separately, the electromagnetic pressure was calculated, and furthermore, the measured results are contrasted and analyzed. The key parameters for hot-top electromagnetic casting are determined according to the control condition. The effect of hot-top electromagnetic casting electromagnetic casting technology on reducing the inclusion of Al ingot caused by electromagnetic stirring during electromagnetic casting and system operability was investigated. The results show that the hot-top technology can wipe off the oxide inclusion efficiently, moreover, hot-top electromagnetic casting makes the technical process of electromagnetic casting more easily and simply.
Key words: aluminum alloy; electromagnetic casting； hot-top； inclusion
