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分别采用熔炼、吸铸和单辊甩带法制备了铸态、亚快速凝固和快速凝固下的A1-5Fe合金和A1-5Fe-3Y合金,探讨了冷却速度的提高和稀土Y的添加对A1-5Fe合金的组织和相组成的影响。结果表明,稀土Y可以使A1-5Fe合金中Al3Fe相由针状转变为团球状并使快速凝固合金中出现了二次析出相。冷却速度的提高使合金的组织得到进一步细化,并使Al-5Fe和A1-5Fe-3Y合金中分别出现了亚稳相A16Fe和金属间化合物A110Fe2Y相。
The A1-5Fe alloy and the A1-5Fe-3Y alloy under the as-cast, sub-rapid solidification and rapid solidification conditions were prepared by melting, casting and single-roll rejection respectively. The effects of the cooling rate and rare earth Y on the growth of A1 -5Fe alloy microstructure and phase composition. The results show that rare earth Y can make the Al3Fe phase in Al-5Fe alloy transform from acicular to spheroidal and make the secondary precipitation appear in the rapidly solidified alloy. The increase of cooling rate further refined the microstructure of the alloy, and the metastable phase A16Fe and the intermetallic compound A110Fe2Y phase appeared in Al-5Fe and Al-5Fe-3Y alloys, respectively.