杨怀德,龙思远,朱姝晴,范超,杨承志.硼化物、富Ce混合稀土对再生Al-Si合金中富铁相变质行为的研究[J].稀有金属材料与工程,2016,45(1):187~191.[yang huai de,long si yuan,zhu shu qing,fan chao,yang cheng zhi.Effects of borides and Ce-rich Mischmetal on the modification of Fe-rich intermetallics in secondary Al-Si alloys[J].Rare Metal Materials and Engineering,2016,45(1):187~191.]
硼化物、富Ce混合稀土对再生Al-Si合金中富铁相变质行为的研究
投稿时间:2014-01-21  修订日期:2014-02-17
中文关键词:  富铁相  变质  再生Al-Si合金  稀土  硼化物
基金项目:9C省部产学研结合重大专项项目-汽车轻量化构件精益铸造关键技术及产业化集群示范(项目号2012A090300016);山东省自主创新专项计划项目(项目号20126301)
中文摘要:
      本文研究了硼化物、富Ce混合稀土对再生Al-Si合金富铁相变质行为的影响。采用光学显微镜(OM)、扫描电镜(SEM)对试样微观组织进行形貌观察,采用X射线衍射仪分析仪(XRD)、扫描电镜附带的能谱仪(EDS)分别对试样进行相分析与相成分分析,利用差分扫描量热仪(DSC)研究相转变温度。研究表明硼化物可以促进针状β-Fe相向初生α-Fe相转变,且初生α-Fe相尺寸随着硼化物的添加量增加而增大,当硼化物(KBF4)添加量达到1.0%时,开始析出汉字状α-Fe相,汉字状α-Fe相以初生α-Fe相为基底形核并长大;富Ce混合稀土可以抑制初生α-Fe相长大,且能抑制汉字状α-Fe相生成
Effects of borides and Ce-rich Mischmetal on the modification of Fe-rich intermetallics in secondary Al-Si alloys
英文关键词:Fe-rich intermetallics  modification  secondary Al-Si alloys  rare earth  borides
英文摘要:
      Effects of borides and Ce-Rich mischmetal on the modification of Fe-rich intermetallics in secondary Al-Si alloys are studied in this paper.Microstructure morphology is observed by optical microscope(OM) and scanning electric microscope(SEM) , phases and compositions of phases are analyzed by X-ray diffraction(XRD)and energy dispersive X-ray (EDS) respectively.Phase transition temperature is measured by differential scanning calorimeter(DSC).It is indicated that borides can prompt transformation from needle-like β-Fe phase to primary α-Fe phase. And the size of primary α-Fe phase increases with the addition of borides. When the borides(KBF4)reaches 1.0%, Chinese script-type α-Fe phase begins to precipitate. Nucleation of Chinese script-type α-Fe phase are based on primary α-Fe phase. Ce-rich mischmetal can inhibit the growth of the primary α-Fe phase and the formation of Chinese script-type α-Fe phase.
作者单位E-mail
杨怀德 重庆大学 材料科学与工程学院 yanghuaide87@126.com 
龙思远 重庆大学 材料学院 siyuan-long@sina.com 
朱姝晴 重庆大学 材料学院  
范超 重庆大学材料学院  
杨承志 重庆大学材料学院  
摘要点击次数: 44
全文下载次数: 51
查看全文  查看/发表评论  
关闭