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材料研究学报  2007, Vol. 21 Issue (5): 491-495    
  论文 本期目录 | 过刊浏览 |
电磁--悬浮铸造对变形镁合金晶粒细化的影响
任政; 张兴国; 房灿峰;郝 海
引用本文:

任政; 张兴国; 房灿峰; 郝海 . 电磁--悬浮铸造对变形镁合金晶粒细化的影响[J]. 材料研究学报, 2007, 21(5): 491-495.

全文: PDF(690 KB)  
摘要: 在悬浮铸造的基础上引入了电磁搅拌, 并将其与悬浮铸造的优点有机结合,通过不同电磁搅拌时间对悬浮铸造AZ61变形镁合金进行了试验,悬浮剂的加入使合金液中形成了大的能量起伏和成分起伏, 有助于形成细晶组织,电磁搅拌的引入加速了悬浮剂和合金母液的均匀混合,有效避免了悬浮剂在合金液中的聚集搭桥”现象和悬浮剂在铸件中的夹生,结果表明在悬浮剂为2%(质量分数)时进行2 min搅拌时效果最佳, 组织的平均晶粒度最小,达到57.5 um, 是悬浮铸造时的三分之一, 是金属型铸造的四分之一.析出相Mg$_{17}$Al$_{12}$明显减少和细化,并且在基体上的分布更加弥散.电磁悬浮铸造(2 min, 2%)对比金属型铸造, 抗拉强度提高了约20%,屈服强度提高了约30%, 延伸率提高了近50%
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收稿日期: 1900-01-01     
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