应用一种短流程制备技术生产Cu-2.3Fe-0.03P合金带材.合金经过在线热轧淬火以及80%变形量的冷加工后,展示了优良的再结晶抗软化性能.分别利用硬度计及双电桥法测量计算合金的硬度和电导率,利用光学显微镜和透射显微镜观察样品的显微组织.成品 Cu-2.3Fe-0.03P 合金的主要强化方式为加工硬化,尺寸大约为25 nm的Fe粒子起到稳定冷轧组织的作用.大变形量冷轧会使得合金电导率下降,特别是预时效的样品其电导率下降更多,其主要原因为冷轧过程中小于5 nm的微细粒子容易重新回溶到基体中.实验获得了电导率为66% IACS和硬度为HV 134的Cu-Fe-P合金.%A short process without solution treatment was developed to manufacture Cu-2.3Fe-0.03P alloy strips. After hot rolling-quenching and cold rolling with 80% reduction, the alloy exhibited excellent resistance to recrystallization softening. The hardness and electrical conductivity of Cu-Fe-P alloy under different thermomechanical treatments were measured by hardness tester and double bridge tester, respectively, and the microstructure of the alloy was examined by optical microscopy and transmission electron microscopy. The results show that the finished product of Cu-2.3Fe-0.03P alloy was strengthened by work hardening, while the Fe precipitates with the size of about 25 nm stabilized the cold rolled structure. The conductivity decreased during cold rolling, especially for the pre-aged specimens, because the fine precipitates with the size smaller than 5 nm re-dissolved easily into the matrix. A Cu-Fe-P alloy with an electrical conductivity of 66% IACS and a hardness of HV 134 can be gained.
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