富铈混合稀土对再生铝硅合金组织和性能的影响  

Effect of Ce-Rich Mischmetal Addition on Microstructure and Tensile Properties of Secondary Al-Si Alloys

作　　者：范超[1,2] 龙思远[1] 吴明放[1] 杨怀德[1] 

机构地区：[1]重庆大学,重庆400030 [2]广西科技大学,广西柳州545006

出　　处：《稀有金属材料与工程》2014年第12期3073-3077,共5页Rare Metal Materials and Engineering

基　　金：国家重点基础研究发展计划("973"计划)基金资助(2007CB613702);9C省部产学研结合重大专项项目(2012A090300016);山东省自主创新专项计划项目(20126301)

摘　　要：采用光学显微镜(OM)、扫描电镜(SEM)、能谱仪(EDX)和差分扫描量热仪(DSC)等手段研究了富铈混合稀土对再生铝硅合金显微组织和力学性能的影响。结果表明:富铈混合稀土能够明显细化合金晶粒,能将粗大的汉字状α-Fe变质为细小的形状,还生成了新的富稀土相。当富铈混合稀土添加量1%(质量分数)时,综合力学性能最佳。The effects of cerium-rich mischmetal addition on microstructure and mechanical properties of secondary A1-Si alloys were investigated by optical microscope （OM）, scanning electric microscope （SEM）, energy dispersive X-ray （EDX） and differential scanning calorimetric （DSC）. The results indicate that the mischmetal addition could refine the grains and modify the a-Fe phases from large Chinese script-like into the individual and fine nodular shape. A new phase enriched MM appears in the microstructure. When the addition amount of the Ce-rich mischmetal is 1%, the tensile properties of the secondary A1-Si alloys reach the optimal values

关 键 词：富铈混合稀土 再生铝硅合金 组织 性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程]