铝合金车轮材料A356中钠与锶变质差异

The Modifying Differences between Sodium and Strontium in Aluminum Alloy A 356 for Wheel

通过对比试验考察了铝合金Ａ３５６中钠与锶的变质的差异．借助于扫描电镜和电子探针（ＪＸＡ８４０Ａ）分析了显微组织中相的分布及生长形貌，并从晶体生长和变质原子特性方面，对变质机理进行了分析．

The authors deal with the modifying differences between sodium (Na) and strontium (Sr) in aluminum alloy A 356 ,and analyze the distribution and growth morphology of phases (primary α and Si) in microstructure by Electron-Scanning Microscope and Electron-Probe(JXA-840A).Moreover,the modifying mechanism is explored from the view of crystal growth and atom characteristics of modifying elements.