喷射成形8009耐热铝合金第二相组织形态的研究  

Research on Second Phase Morphology of Spray Forming 8009 Heat-resistant Aluminum Alloy

作　　者：张荣华[1] 张永安[2] 朱宝宏[2] 郑小平[1] 

机构地区：[1]河北联合大学冶金与能源学院河北省现代冶金重点实验室,河北唐山063009 [2]北京有色金属研究总院有色金属材料制备加工国家重点实验室,北京100088

出　　处：《热加工工艺》2014年第16期43-45,49,共4页Hot Working Technology

基　　金：河北省自然科学基金项目(E2013209268);唐山市科技计划项目(12110219b)

摘　　要：采用喷射成形工艺制备了8009耐热铝合金,应用差示扫描量热仪对沉积态合金从室温到500℃之间的相转变进行测定。利用透射电镜和X射线衍射仪,对沉积态合金的组织及合金中出现的相进行观察。结果表明:沉积态合金在升温过程中无吸热峰出现,合金从室温加热到500℃过程中未发生明显相变。沉积态合金的相组成主要为α-Al和α-Al12(Fe,V)3Si相。合金中除了在基体上弥散分布着细小的α-Al12(Fe,V)3Si相外,还存在少量呈团状、扇形、针状、块状和条状等形状的第二相,这些相分别为Al12Fe3Si、Al8Fe2Si、θ-Al13Fe4、Al9FeSi3和Al6Fe。Heat-resistant 8009 aluminum alloys were prepared by spray forming technique. The phase transition of deposied alloys from room temperature to 500 ℃ was measured by differential scanning calorimeter. The microstructure and the second phases of the alloys were studied by transmission electron microscopy and X-ray diffraction. The research results show that No endothermic peak appears in the deposited alloys during heating process, there is no phase transition occuring in the alloy during the heating process from room temperature to 500 ℃. The deposited alloys mainly include α-Al and α-Al12（Fe,V）3Si phase. Under the transmission electron microscopy, there are also small amounts of slug, fan-shaped, needle-like,block and strip second phases. The phases are Al12Fe3 Si, Al8Fe2 Si, θ-Al13Fe4, Al9FeSi3 and Al6Fe.

关 键 词：喷射成形 耐热铝合金 第二相 显微组织 

分 类 号：TG146.2[一般工业技术—材料科学与工程]