电磁搅拌下铝铜合金初生晶生长机理的初步探讨  

Discussion of Growth Mechanism of Primary Grain in Al-Cu Alloy Under Electromagnetic Stirring

作　　者：陈莉娟[1] 金青林[2] 蒋业华[2] 卢德宏[2] 

机构地区：[1]曲靖师范学院物理与电子工程学院,云南曲靖655011 [2]昆明理工大学机电工程学院,云南昆明655093

出　　处：《热加工工艺》2009年第11期24-26,共3页Hot Working Technology

基　　金：曲靖师范学院专项资助项目(2008MS023)

摘　　要：通过检测初生固相的晶粒取向,对Al-Cu合金初生晶的生长机理进行初步探讨。结果表明:电磁搅拌下由于液相在枝晶间凝固,因而使得枝晶在二维条件下呈现出一个个独立的晶核;电磁搅拌一定程度上能够抑制枝晶的生长,最终初生固相以团块状聚结在一起。The growth mechanism of primary grain of Al-Cu Alloy was investigated according to the grain orientation of primary phase. The results show that, because of solidfication of liquid phase on primary dendrite under electromagnetic stirring, the dendrite has a tendency towards separation under the two-dimension condition; the growth of dendrite is inhibited to a certain extent under electromagnetic stirring, so primary solid phase conglomerates in the form of particle groupe.

关 键 词：电磁搅拌 Al—Cu合金 晶粒取向 生长机理 

分 类 号：TG244.3[金属学及工艺—铸造]