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用熔铸法制备了Cu-12%Fe合金,研究了经1000℃固溶后不同时效工艺对合金的相组成、显微组织、硬度及电导率的影响。结果表明,550℃时效可细化合金的Fe枝晶,消除Cu基体枝晶偏析并改变晶面间距。合金硬度在时效初期时下降,随后增加并达到最大值后再次下降。在350℃和450℃时效时,电导率随时效时间增加而上升。在550℃和650℃时效时,电导率随时效时间先增加而后下降。对Cu-12%Fe合金固溶并在550℃时效4h,可以获得良好的力学和电学性能匹配。
The Cu-12% Fe alloy was prepared by melt casting. The effects of different aging treatments at 1000 ℃ on the phase composition, microstructure, hardness and electrical conductivity of the alloy were studied. The results show that aging at 550 ℃ can refine the Fe dendrites and eliminate the dendrite segregation of Cu matrix and change the interplanar spacing. The hardness of alloy decreases at the beginning of aging, then increases and reaches the maximum value and drops again. At 350 ℃ and 450 ℃ aging, the conductivity increases with the aging time. When aging at 550 ℃ and 650 ℃, the conductivity increases first and then decreases with the aging time. The solid solution of Cu-12% Fe alloy and its aging at 550 ℃ for 4h can achieve good mechanical and electrical properties matching.