康学良1,2，金自力*1，任慧平2，张玲郁1,2,李兵磊1,2,王硕1,2
（1.内蒙古科技大学材料与冶金学院，内蒙古包头 014010；
2.内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室，内蒙古包头 014010)
关键词：6016铝合金；铸态；组织；第二相
中图分类号：TG146.2+1 文献标识码：A
摘要：采用光学显微镜和扫描电镜观察铸态6016铝合金组织及第二相的形貌及分布，并利用软件统计分析晶粒的大小；采用电化学方法富集合金中析出相粉末，结合X射线衍射仪鉴定合金中第二相的类型及结构，结合激光粒度仪分析第二相混合粉末的粒度分布。结果表明：合金中包含Si、Al8FeMg3Si6、Mg2Si、Al5FeSi四种第二相，具有不同形貌，分布于晶界处和晶内，这些第二相粉末的粒度集中在6～20 um范围内，平均粒径大约12um。
Research on microstructure and secondphases in 6016 aluminum alloy
KangXueliang1,2,Jin Zi-li1,Ren Huiping2, Zhang Ling-yu1,2,LiBing-lei1,2,Wang Shuo1,2
（1. Material and Metallurgy School,InnerMongolia University of Science and Technology,Baotou 014010,China;
2.Key Laboratory of Integrated Exploitationof Bayan Obo Multi-Metal Resources,IMUST,Baotou 014010, China）
Abstract: Themicrostructure and second phases in as-cast 6016 aluminum alloy were investigatedby means of optical microscopy(OM), scanning electron microscopy (SEM), X-ray diffraction (XRD) and particle size analysis. The results indicate thatthe grain size of the alloy rangs from 15um to 111um， andtheir average is about 53um.The microstructure of the as-cast 6016 aluminumalloy mainly consists of the dendritic network of phases such as Al5FeSi，Al8FeMg3Si6，Siand Mg2Si,which has a mean size of about 12.65um.
Key words: 6016 aluminumalloy; as-cast; microstructure; second phase