铝合金中典型富Fe相在镁熔体中的演变行为研究
Evolution Behaviors of Typical Fe-rich Phases of Al Alloy in Mg Melts
苏宏福 1刘敬彬 1程汉明 2张达成 2韩梦霞 1高通 1刘相法1
作者信息
- 1. 山东大学材料科学与工程学院,材料液固结构演变与加工教育部重点实验室,济南 250061
- 2. 南通鸿劲金属铝业有限公司,南通 226300
- 折叠
摘要
通过向镁熔体中引入Al-2Fe-2Mn、Al-12Si-2Fe-2Mn和ADC12铝合金,并进行熔体保温和冷却,在铸锭底部获得了富Fe相沉淀层.利用扫描电镜和X射线衍射技术研究了富Fe金属间化合物在Mg熔体中的形貌和结构特点,发现沉淀层中的富Fe相相较于初始铝合金中均发生了结构转变,呈核-壳结构形态.Al-2Fe-2Mn合金中的Al6(Mn,Fe)相在镁熔体中演变成了 Al(Fe,Mn)和Al5(Fe,Mn)2;Al-12Si-2Fe-2Mn合金中的 α-Al15(Fe,Mn)3Si2相和 ADC12 铝合金中的β-Al5Si(Fe,Mn)相均演变为 Al5(Fe,Mn),和(Fe,Mn)3Al0.7Si0.3.相比初始铝合金,演变后合金富Fe相中Al含量显著降低,即该部分Al溶解于镁熔体,进而可被回收利用.
Abstract
Al-2Fe-2Mn,Al-12Si-2Fe-2Mn,and ADC12 alloys were introduced into Mg melts,followed with melt holding and cooling,and Fe-rich perticipate layers were obtained at the bottom of ingots.Morphologies and strucutre characteristics of Fe-rich phases in Mg melt were investigated by scanning electron microscopy and X-ray diffraction.The results reveal that the structure of Fe-rich phases is transformed,presenting core-shell morphologies.Al6(Mn,Fe)phase in Al-2Fe-2Mn alloy is evolved to Al(Fe,Mn)and Al5(Fe,Mn)2 in the Mg melt,whereas α-Al15(Fe,Mn)3Si2 phase in Al-12Si-2Fe-2Mn alloy and β-Al5Si(Fe,Mn)in ADC12 alloy are both converted to Al5(Fe,Mn)2 and(Fe,Mn)3Al0.7Si0.3 phases.Compared to the primary Al alloys,Al content is singificantly reduced in Fe-rich phases of evolved alloys,indicating the dissolution of Al into Mg melt,which can be gathered and reused.
关键词
铝合金/金属间化合物/相结构/镁熔体Key words
Al Alloys/Intermetallics/Phase structure/Mg Melt引用本文复制引用
出版年
2024
NETL
NSTL
万方数据