Al-5Mg-0.8Mn合金的凝固组织研究  

Study on Solidification Microstructure of Al-5Mg-0.8Mn Alloys

作　　者：罗星 欧良云 韩朝飞[2] 罗磊[2] 刘玉林[2] 

机构地区：[1]内蒙古霍煤鸿骏高精铝业有限责任公司,内蒙古霍林郭勒029200 [2]沈阳航空航天大学,辽宁沈阳110136

出　　处：《热加工工艺》2015年第23期51-54,共4页Hot Working Technology

摘　　要：通过重熔-凝固试验,研究了接近AA5083合金成分的Al-5Mg-0.8Mn合金的凝固组织。结果表明:Fe和Si元素对Al-5Mg-0.8Mn有重大影响,促进了金属间化合物Al_6(Fe,Mn)和Mg_2Si的形成。当Fe、Si含量很低时,Al-5Mg-0.8Mn合金的凝固组织非常简单,只是在α-Al基体上零星散落着一些细小的Al_6(Fe,Mn)共晶相。当Fe、Si含量较高时,合金中不但出现了大量粗大的Al_6(Fe,Mn)和Mg_2Si共晶相,而且,共晶相Al_6(Fe,Mn)呈现多种不同的形态,而Mg2Si相主要呈汉字状。The solidification structure of Al-5Mg-0.8Mn alloys which were closed to the composition specification of AA5083 alloy was investigated through remelting-solidification experiment. The results indicate that the elements iron and silicon are of significant influence on the solidification behavior and structure of Al-5Mg-0.8Mn alloys. The alloy with low concentrations of iron and silicon displays a simple microstructure with a small amount of intermetallic Al6（Fe, Mn） scattering on α-Al matrix. In the alloy with high concentrations of iron and silicon, the solidification structures are very complicated with a large amount ofinterematllics Al6（Fe,Mn） and Mg2Si. The intermetallic Al6（Fe, Mn） displays several different shapes. MgESi phase mainly shows a Chinese script morphology.

关 键 词：铝合金 凝固 微观组织 

分 类 号：TG244[金属学及工艺—铸造]