摘要
综述了过共晶铝硅合金变质处理及其细化变质机理的研究进展。采用含磷化合物或含磷合金等细化变质处理过共晶铝硅合金中的初晶硅已取得了良好的效果;变质元素Na、Sr、Ba、Te、Sb、S、Y、Ca、Bi、As、Ce、Nd、RE等元素对共晶硅具有较好的细化变质作用;近年来,同时添加磷和混合稀土复合变质剂,既能细化初晶硅,又能细化共晶硅。寻求具有良好双重变质效果的复合变质剂,深入探讨变质机理已成为今后努力的方向。
The development of the modification of hypereutectic Al-Si alloys and their mechanism for refining and modifying Al-Si alloys are described. The good effect has been gained on the primary silicon phase of hypereuteetic Al-Si alloys treated with refining and modifying agents, such as compounds or alloys with P. Some elements （Na, St, Ba, Te, Sb, S, Y, Ca, Bi, As, Ce, Nd, RE, etc） have a good treatment effect on eutectic Si. In recent years, the composite modification agents with P and mixed RE have a good effect on refining both primary crystal Si and eutectic Si. It has a good effect on refining both primary crystal Si and eutectic Si. Seeking better composite modification agents and study of modifying mechanism are direction in the future.
出处
《热加工工艺》
CSCD
北大核心
2009年第3期32-35,共4页
Hot Working Technology
基金
安徽省高校自然科学基金资助项目(KJ2008B272)
关键词
过共品销硅合金
细化
变质
变质机理
hypereutectic Al-Si alloy
refining
modifying
modification mechanism
