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利用力学、电学性能测试和透射电镜观察等手段研究了形变热处理对Cu-2.7Ti-0.15Mg-0.1Ce-0.1Zr合金组织与性能的影响。结果表明:合金固溶后于450℃时效8 h呈典型的调幅分解组织,还存在纳米级强化相β’-Cu4Ti。合金经固溶处理后,冷轧97.5%,在400℃时效1 h时显微组织主要为亚晶组织+纳米析出相,亚晶尺寸约为40 nm。形变热处理能够有效提高合金的综合性能,合金经过97.5%冷变形、于400℃/12 h时效后,硬度为301 HV、电导率为20.9%IACS。
The effects of deformation heat treatment on microstructure and properties of Cu-2.7Ti-0.15Mg-0.1Ce-0.1Zr alloy were studied by means of mechanics, electrical property test and transmission electron microscope observation. The results show that after solution treatment at 450 ℃ for 8 h, the alloy exhibits typical amplitude-modulated decomposition structure and nano-sized strengthening phase β’-Cu4Ti. After solution treatment, the alloy was cold-rolled by 97.5%. The microstructure was mainly sub-crystallized + nano-precipitated phase at 400 ℃ for 1 h, and the subgrain size was about 40 nm. The deformation heat treatment can effectively improve the overall performance of the alloy. The alloy undergoes 97.5% cold deformation after aging at 400 ° C for 12 h with a hardness of 301 HV and a conductivity of 20.9% IACS.