中国铸造2010，Vol.7Issue(3)：275-277,3.
Effects of beryllium and iron additions on iron-bearing phase in A357 aluminum alloys
Effects of beryllium and iron additions on iron-bearing phase in A357 aluminum alloys
摘要
Abstract
Iron is the most deleterious impudty in the Al-Si-Mg casting alloys and can easily form inter-metallic compounds that can significantly affect the subsequent behavior of material properties.Using differential scanning calorimetry(DSC)and microstructural analysis,how the Be and Fe additions affect the iron-bearing phase in A357alloys was investigated.The results show that the iron-bearing phase in A357 alloy comprises mainly the platelike β-Al5FeSi and a small quantity of the script-type π-Al5FeMg3Si6; and that the plate-like β-Al5FeSi proportion increases with increasing iron content in the alloy.The iron-bearing phase is mostly transformed from the plate-likeβ-Al5FeSi to the script-type π-Al8FeMg3Si6 with the addition of Be in the alloy.The hardness of alloy samples was also tested.The results show that both the increasing iron content and Be content can increase the hardness of the alloy.This may be contributed to the change of morphology and distribution of the iron-bearing phase in A357alloy with the addition of iron or Be to the alloy.关键词
solidification/differential scanning calorimetry(DSC)/A357 aluminum alloy/microstructure/ironbearing phaseKey words
solidification/differential scanning calorimetry(DSC)/A357 aluminum alloy/microstructure/ironbearing phase分类
矿业与冶金引用本文复制引用
Chen Zhongwei,Zhang Haifang,Zhang Ruijie..Effects of beryllium and iron additions on iron-bearing phase in A357 aluminum alloys[J].中国铸造,2010,7(3):275-277,3.基金项目
The project was financially supported by the Natural Science Foundation of Shaanxi Province(No.SJ08-ZT05). （No.SJ08-ZT05）
