稀土La对铝镁合金凝固曲线和微观组织的影响  

Effect of Rare Earth Larium on Solidification Curve and Microstructure of Al-Mg Alloy

作　　者：易荣喜[1] 谢世坤[1] 郑小秋[1] 潘晓亮[1] 郭秀艳[1] 

机构地区：[1]井冈山大学机电学院,江西吉安343009

出　　处：《热加工工艺》2012年第17期6-7,15,共3页Hot Working Technology

基　　金：国家自然科学基金资助项目(51165010);江西省科技支撑计划项目(20112BBE50002);江西省自然科学基金资助项目(20114BAB206018);江西省教育厅科技研究项目(GJJ11527);江西省青年科学家培养对象计划项目(赣科发计字[2010]209号)

摘　　要：研究了稀土La对铝镁合金凝固区间和微观组织的影响。结果表明,La对铝镁合金凝固区间和微观组织有明显的影响。加入La,合金凝固区间变大、凝固时间增加,合金流动性能得到改善。La的加入对合金有变质作用,晶粒数量增多,尺寸变小,形貌圆整。The effects of RE La on the solidification range and the microstructure of A1-Mg alloy were researched. The results indicate that the addition of RE La can significantly impact on the solidification range and the microstructure. The addition of RE La can enlarge the alloy solidification range and increase its solidification time and its flow performance also get great improvement. The addition of RE La has the metamorphism effect on A1-Mg alloy, the grain number gets increase, the grain size get smaller and its morphology becomes rounder.

关 键 词：铝镁合金 稀土La 凝固区间 微观组织 

分 类 号：TG292[金属学及工艺—铸造]