摘要
通过喷射沉积工艺制备了Al-25Si-xFe-yMn(Mn/Fe质量比在0～1之间)系列合金的沉积坯,利用SEM、XRD和EDX对这些沉积坯的微观组织进行分析.结果表明,添加Mn元素,将生成颗粒状的α-Al15(Fe,Mn)3Si2,取代了针状的δ-Al4FeSi2和β-Al5FeSi相,从而显著地改善高硅铝合金中的Fe相的形貌,并且随着Mn/Fe质量比的提高,沉积坯中颗粒状的α-Al15(Fe,Mn)3Si2含量也增加,而针状相的含量却减少,当Mn/Fe质量比增加到0.83或1时,在沉积坯中只发现颗粒状的α-Al15(Fe,Mn)3Si2.
Al-25Si-x Fe-y Mn alloys with the mass ratio of Mn to Fe between 0 and 1 were synthesized by spray deposition.The microstructure of the spray-deposited preforms was investigated by SEM,XRD and EDX.The results indicated that Mn addition could improve the morphology of Fe phases through forming particulate α-Al 15 （Fe,Mn） 3Si 2 phase to replace acicular δ-Al 4FeSi 2 and β-Al 5FeSi phases.When the mass ratio of Mn to Fe increased,the amount of particulate α-Al 15 （Fe,Mn） 3Si 2 phase would increase,whereas the amount of acicular phases reduced.When the mass ratio of Mn to Fe increased to 0.83 or 1,only particulate α-Al 15 （Fe,Mn） 3Si 2 phase could be observed in the deposited preform.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2010年第2期219-223,共5页
Journal of University of Science and Technology Beijing
基金
国家重点基础研究发展计划资助项目(No.2006CB605204)
关键词
硅铝合金
铁相
锰
喷射沉积
hypereutectic Al-Si alloys
iron phase
manganese
spray deposition
