铸造2011，Vol.60Issue(12)：1175-1179,1184,6.
提高7050铝合金形核率的试验及理论分析
Experimental and Theoretical Analysis on Enhancing Nucleation Rate of 7050 Aluminum Alloy
摘要
Abstract
The change of nucleation rate, caused by different power of ultrasound, during the solidification process of 7050 aluminum alloy has been analyzed quantitatively from both thermodynamics and kinetics of crystallization. The research indicates that nucleation rate increases significantly with the acting of ultrasound and it gets higher with the increase of the ultrasonic power. In the process of ultrasound casting, the nucleation rate increases by 106 to 108 times when compared with that of conventional casting. The temperature of the aluminum alloy melt and the undercooling degree are the main variables which can influence the change of the nucleation rate. The mathematical model among the nucleation rate of 7050 aluminum alloy, undercooling degree and melt temperature were derived.关键词
7050铝合金/超声铸造/形核率/理论研究Key words
7050 aluminum alloy/ ultrasound casting/ nucleation rate/ theoretical research分类
通用工业技术引用本文复制引用
胡谦谦,张立华..提高7050铝合金形核率的试验及理论分析[J].铸造,2011,60(12):1175-1179,1184,6.基金项目
国家"973"项目"航空航天用高性能轻合金大型复杂结构件制造的基础研究"(2010CB731700). （2010CB731700）
