稀土对AlSi7合金半固态性能的影响  

Effect of RE on Performance of Semi-solid AlSi7 Alloy

作　　者：易荣喜[1] 谢世坤[1] 潘晓亮[1] 郑志强[2] 

机构地区：[1]井冈山大学工学院,江西吉安343009 [2]南昌大学机电学院,江西南昌330029

出　　处：《热加工工艺》2009年第3期25-27,共3页Hot Working Technology

基　　金：江西省教育厅科技研究项目(GJJ08429)

摘　　要：利用近液相线浇注工艺制备了稀土AlSi7合金半固态坯料,研究了添加一定量混合稀土对铝硅合金铸造性能及半固态坯料重熔性能的影响。实验表明,加入稀土拓宽了AlSi7合金的固-液两相温度区间,细化了铝合金晶体组织,硅产生明显变质;稀土的添加量为0.5wt%效果较好,半固态坯料重熔组织为细小均匀的球状晶。The semi-solid slurry of AlSi7 alloy was prepared by near-liquids casting processing. The effects of different content of RE on the casting performance and the Semi-solid remelting performance in AISi7 alloy was researched. The results indicate that adding RE can widen AlSi7 alloy solid-liquid two-phase temperature range, refine grains, and silicon can be obviously metamorphosed. The best amount of RE is about 0.5wt%, at this time, the semi-solid remelting microstructure of corresponding alloy is even globular grains.

关 键 词：半固态重熔 混合稀土 铝硅合金 细化 

分 类 号：TG146[一般工业技术—材料科学与工程]