(大連理工大學(xué) 鑄造工程研究中心， 大連 116024)
摘 要: 根據(jù)熱頂-電磁鑄造的基本思想， 設(shè)計(jì)了一套適合于制取鋁合金扁錠的熱頂-電磁成型系統(tǒng)， 用小線圈法測量了系統(tǒng)內(nèi)的磁場強(qiáng)度，計(jì)算了電磁壓力分布， 并與普通電磁鑄造成型系統(tǒng)的結(jié)果進(jìn)行對比分析； 依據(jù)熱頂電磁鑄造的成型條件， 確定了相關(guān)的控制參數(shù)； 通過大量的拉坯實(shí)驗(yàn)， 探討了熱頂對防止電磁鑄造坯易產(chǎn)生表面夾雜缺陷的作用。結(jié)果表明： 采用熱頂-電磁鑄造法不僅可有效去除電磁鑄造中因電磁攪拌產(chǎn)生的氧化夾雜，而且使得電磁鑄造過程簡便而易于控制。
關(guān)鍵字: 鋁合金； 電磁鑄造； 熱頂； 夾雜
JIA Fei， CAO Zhi-qiang， JIN Jun-ze
（ 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
