铸造2012，Vol.61Issue(4)：373-377,5.
CDS铸造过共晶铝硅合金组织及性能研究
Study on Microstructure and Property of Hypereutectic Al-Si Alloy by CDS Casting
摘要
Abstract
By using the controlled diffusion solidification (CDS) technology, the hypereutectic Al-20%Si alloy was prepared. The effects of mixing ways and mixing temperature of high-silicon alloy on microstructure and properties of target alloy as well as the relationship between microstructure and thermal expansion property have been studied. The results show that the target alloy prepared by CDS process, namely mixing liquid pure-Al (660 ℃) with liquid Al-25% Si (850 ℃) alloy, has the lowest linear expansion coefficient (15.7 ×l0-6 ℃ -1 from 30 癈 to 300 ℃) , the primary silicon phase of the alloy distributes uniformly, its shape is regular and size is minimal. The analysis shows that thermal expansion property of Al-20%Si alloy is mainly depends on the morphology and distribution of primary silicon, which has little relation to the grain size.关键词
过共晶铝硅合金/受控扩散凝固/初生硅相的分布/线膨胀系数Key words
hypereutectic Al-Si alloy/ controlled diffusion solidification/ distribution of primary silicon/ linear expansion coefficient分类
矿业与冶金引用本文复制引用
罗影,李元东,李夏,马颖,郝远..CDS铸造过共晶铝硅合金组织及性能研究[J].铸造,2012,61(4):373-377,5.基金项目
国家自然科学基金项目资助(51064017). （51064017）
