Al-1%Si单晶制备工艺及微观组织分析  

Preparation and microstructure analysis of Al-1%Si single crystal

作　　者：陈亚军[1] 陈琦[1] 王自东[1] 胡汉起[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083

出　　处：《北京科技大学学报》2005年第1期50-54,共5页Journal of University of Science and Technology Beijing

基　　金：国家"863"计划项目(No.2002AA336070)

摘　　要：在自制的真空熔炼、氩气保护下拉式连续定向凝固设备上成功制取了具有单晶组织的φ8mm Al-1％Si合金棒材,并对其组织演变过程及稳定性进行了研究.分析了定向凝固过程中,硅颗粒在单晶组织中的分布形态,提出了使硅固溶或弥散均匀分布于铝基体中的措施.An Al-1%Si bar with 8 mm in diameter and single crystal was made with self-made vacuum vertical continuous unidirectional casting equipment. The microstructure evolution and stability during continuous unidirectional solidification were studied. The Si distribution of particles in Al matrix was analyzed and a method was proposed that can make Si diffuse in Al homogeneously.

关 键 词：单晶 键合线 真空熔炼 氩气保护 连续定向凝固 

分 类 号：TG249.7[金属学及工艺—铸造]