Microstructure and properties of Cu-2.3Fe-0.03P alloy during thermomechanical treatments  

形变热处理对Cu-2.3Fe-0.03P合金组织与性能的研究（英文）

作　　者：董琦祎[1] 申镭诺[1] 汪明朴[1] 贾延琳[1,2] 李周[1] 曹峰[1] 陈畅[2] 

机构地区：[1]中南大学材料科学与工程学院,长沙410083 [2]中南大学冶金与环境学院,长沙410083

出　　处：《Transactions of Nonferrous Metals Society of China》2015年第5期1551-1558,共8页中国有色金属学报（英文版）

基　　金：Project supported by Central South University Postdoctoral Science Foundation;Project(CSUZC2013019)supported by the Open Fund for the Precision Instruments of Central South University,China;Project(CSUZC201522)supported by the Open-End Fund for the Valuable and Precision Instruments of Central South University,China

摘　　要：A short process without solution treatment was developed to manufacture Cu-2.3Fe-0.03 P 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-0.03 P 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.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。

关 键 词：Cu-Fe-P alloy solution treatment hot rolling precipitation RECRYSTALLIZATION 

分 类 号：TG166.2[金属学及工艺—热处理]