稀土元素对过共晶铝硅合金的变质机理  

Modification Mechanism of RE on Hypereutectic Al-Si Alloy

作　　者：张瑜[1,2] 王宇鑫[1,2] 廖文俊[1,2] 王华钰[1,2] 杨颖[1,2] 严彪[1,2] 

机构地区：[1]同济大学材料科学与工程学院,上海200092 [2]上海市金属功能材料开发应用重点实验室,上海200092

出　　处：《金属功能材料》2010年第3期86-90,共5页Metallic Functional Materials

基　　金：国家973项目子课题(NO.2007CB613900);上海市科学技术发展基金(08DZ2201300);上海市纳米专项(0752nm004)资助项目

摘　　要：过共晶铝硅合金具有很多优良的特性,是一种极有发展前途的结构材料,但合金中粗大的初晶硅和细长的共晶硅组织会影响其力学性能,研究表明添加稀土元素可以有效的细化初晶硅和共晶硅。本文总结了目前几种主要的变质理论,并对其以后的研究和发展方向进行了展望。The hypereutectic Al-Si alloy is a kind of promising structural material for its excellent properties.The mechanical behavior of unmodified hypereutectic Al-Si alloy is often worse due to the presence of coarse primary silicon and long needlelike eutectic silicon.Former study shows that hypereutectic Al-Si alloy can be refined by the addition of rare earth modificator.In this paper,the common modification mechanisms were summarized.The developing situation and future development prospects were given as well.

关 键 词：过共晶铝硅合金 稀土 调质处理 变质机理 

分 类 号：TG27[金属学及工艺—铸造]