铸造2011，Vol.60Issue(6)：540-545,6.
在不同冷却速率下Er对A356合金共晶组织的变质作用
Effects of Erbium on Eutectic Modification of A356 Alloy at Different Cooling Rate
摘要
Abstract
The A356 alloy was modified by addition of rare earth erbium.The morphology of the eutectic silicon phase was modified by controlling the erbium addition amount and the cooling rate.The effect of erbium on modification of silicon phase in A356 eutectic alloy was determined by optical microscope, SEM, TEM and EDS.The results reveal that with the addition of 0.3％ erbium, the microstructure of the eutectic silicon phase was refined markedly, and the cooling rate had significant effect on the microstructure of the eutectic silicon phase.At a high cooling rate (250 ℃/s), the addition of erbium (0.5％) was found to promote the formation of fine fibrous silicon phases.The mechanism governing the morphology evolution was also discussed.关键词
铒/A356合金/硅/变质Key words
erbium/ A356 alloy/ silicon/ modification分类
矿业与冶金引用本文复制引用
王俊峰,苏学宽,聂祚仁..在不同冷却速率下Er对A356合金共晶组织的变质作用[J].铸造,2011,60(6):540-545,6.基金项目
国家高技术研究发展计划(863计划)项目(2006AA03A207,2007AA032514) （863计划）
北京市教委资助项目(KM200810005011). （KM200810005011）
