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.
出处
《金属功能材料》
CAS
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
关键词
过共晶铝硅合金
稀土
调质处理
变质机理
hypereutectic Al-Si alloy
rare earths
modified treatment
modification mechanism
