Cu-Zr-Nd合金的时效强化和析出动力学  

Aging strengthening and precipitation kinetics of Cu-Zr-Nd alloy

作　　者：孙慧丽[1,2] 张毅[1,2] 柴哲[1,2] 田保红[1,2] 刘勇[1,2] 许倩倩[1,2] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471023 [2]有色金属共性技术河南省协同创新中心,河南洛阳471023

出　　处：《材料热处理学报》2016年第9期86-91,共6页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51101052);河南省重点科技攻关项目(152102210074);河南省高等学校青年骨干教师资助计划(2012GGJS-073);河南科技大学青年学术带头人启动基金(13490001)

摘　　要：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。Cold deformation and aging treatment for Cu-Zr-Nd alloy were carried out,and the effects of cold deformation,aging temperature and aging time on electrical conductivity and hardness of the alloy were investigated,respectively.The results show that the cold deformation before aging accelerates the precipitating of the second phase and increases the electrical conductivity and hardness of the alloy.The conductivity and hardness of the alloy reach 91.2 % IACS and 141 HV,respectively,after deformation of 60% and then aging at 500 ℃ for 1 h.According to the change of conductivity,the phase transformation volume fraction（f） is calculated,and the phase transformation kinetic equation and electrical conductivity equation of the alloy aged at 500 ℃ are established.

关 键 词：Cu-Zr-Nd合金 冷变形 时效 转变率 相变动力学方程 

分 类 号：TG146.1[一般工业技术—材料科学与工程]