研究了熔体过热、 加冷料搅拌及冷却速度对2618 合金中Al9FeNi相形态的影响。 结果表明， 与2618合金熔体720 ℃正常熔炼浇注相比， 熔体960 ℃过热处理可得到更加细小均匀的针片状Al9FeNi相， 特别是880 ℃过热加纯铝锭冷料搅拌处理可得到长度约4 μm的细小颗粒状Al9FeNi相， 而合金熔体在720 ℃过热后缓慢冷却导致Al9FeNi相的初晶偏析。
The effects of melt over-heating， melt-stirring after adding cold metal as well as cooling rate of liquid metal on the morphology of Al9FeNi phase in 2618 alloy have been investigated．The results show that melt over-heating treatment at 960℃ leads to finer and better-distributed needle-like Al9FeNi phase comparing with normal casting process at 720℃； the grain size of Al9FeNi phase is about 4μm in length, which could be obtained by over-heating the liquid 2618 alloy at 880℃ and melt-stirring after adding cold aluminum block； and small solidification rate after over-heating at 720℃ leads to the formation of primary Al9FeNi phase．
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