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对Cu-Zr-Nd固溶合金进行不同程度的冷变形和时效处理工艺,研究了变形量、温度和时效时间对合金导电率和硬度的影响。结果表明,时效前对合金进行冷变形加工可以大大加快析出相的析出,有效提高合金的导电率和硬度。当合金经60%变形后,在500℃时效1 h后,其显微硬度和导电率可以达到141 HV和91.2%IACS。同时,在500℃时效时,通过导电率的变化,计算出了时效过程中新相的转变率f,并建立了该合金的相变动力学方程和导电率方程。
The effects of deformation, temperature and aging time on the electrical conductivity and hardness of Cu-Zr-Nd alloy were investigated by cold deformation and aging treatment. The results show that the cold deformation of the alloy before aging can greatly accelerate the precipitation of the precipitated phase and effectively improve the electrical conductivity and hardness of the alloy. After 60% deformation, the microhardness and electrical conductivity of the alloy reached 141 HV and 91.2% IACS after aging at 500 ℃ for 1 h. At the same time, the transformation rate f of the new phase during aging was calculated through the change of conductivity at 500 ℃, and the phase transition kinetic equation and conductivity equation of the alloy were established.