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中文摘要：
通过坩埚电阻炉对Al-2%Fe合金进行熔炼,浇入楔形及圆台模具。使用自制的温度实时监测装置采集其凝固过程中的温度变化,并得到采温点处的冷却速率。使用光学显微镜（OM）对采温点处合金的组织进行观察分析。结果表明,未预热模具内合金的冷却速率均高于300℃预热保温模具内的合金;合金底端的冷却速率均高于合金顶端的冷却速率。与预热后模具相比,未经预热模具内合金晶粒更加细小。在较大的冷却速率和过冷条件下可获得针状FeAl3相。
英文摘要：
The Al-2% Fe alloy was melted with crucible resistance furnace, and it was casted into wedge-shaped and circular cone dies. The changes of temperature during solidification were collected by self-designed real-time temperature monitoring device, and the cooling rate of measuring points was obtained. The microstructure of the alloy at measuring points was observed by using optical microscope. The results show that the cooling rate of the alloy in mold without preheating is higher than that of the alloy in mold preheated and insulated at 300 ℃. The cooling rate at the bottom of the alloy is higher than that at the top of the alloy. Compared with the preheated mold, the grain of the alloy in mold without preheating is finer. The acicular FeAl3 phase can be obtained under the conditions of high cooling rate and undercooling.
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