直流电流下Cu-0.33Cr-0.06Zr合金的时效动力学

张彦敏; 王海艳; 罗钧; 白宁; 甘春雷; 李伟文; 宋克兴

doi:10.15980/j.tzzz.2014.11.001

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直流电流下Cu-0.33Cr-0.06Zr合金的时效动力学
Aging Kinetics of Cu-0.33Cr-0.06Zr Alloy under DC（Direct Current）
2014年34卷第11期页码：1123-1126
纸质出版日期： 2014 ，
DOI： 10.15980/j.tzzz.2014.11.001

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[1]张彦敏,王海艳,罗钧,白宁,甘春雷,李伟文,宋克兴.直流电流下Cu-0.33Cr-0.06Zr合金的时效动力学[J].特种铸造及有色合金,2014,34(11):1123-1126.

Zhang Yanmin, Wang Haiyan, Luo Jun, et al. Aging Kinetics of Cu-0.33Cr-0.06Zr Alloy under DC（Direct Current）[J]. Special Casting & Nonferrous Alloys, 2014,34(11):1123-1126.
[1]张彦敏,王海艳,罗钧,白宁,甘春雷,李伟文,宋克兴.直流电流下Cu-0.33Cr-0.06Zr合金的时效动力学[J].特种铸造及有色合金,2014,34(11):1123-1126. DOI： 10.15980/j.tzzz.2014.11.001.

Zhang Yanmin, Wang Haiyan, Luo Jun, et al. Aging Kinetics of Cu-0.33Cr-0.06Zr Alloy under DC（Direct Current）[J]. Special Casting & Nonferrous Alloys, 2014,34(11):1123-1126. DOI： 10.15980/j.tzzz.2014.11.001.

摘要

采用固溶+冷变形+不同直流电流密度下的时效工艺制备了Cu-0.33Cr-0.06Zr（质量分数

下同）合金试样。进行了450℃下不同时效时间及不同电流密度的时效试验

研究了时效电流和时间对Cu-0.33Cr-0.06Zr合金导电性能的影响。采用透射电镜观察时效合金组织

探讨了不同电流密度下该合金的时效析出动力学。结果表明

合金在电流密度为100A/cm2的直流电流下时效

电导率低于无电流时效的;而在电流密度为400 A/cm2下时效2h后

电导率达到49.5MS/m

接近峰值

高于无电流时效的。时效后合金析出Cr相和CuZr3相

通过对电导率与析出相体积分数关系的分析

确定了合金在不同温度下时效的相变动力学Avrami经验方程和电导率方程。

Abstract

Cu-0.33Cr-0.06 Zr alloy was prepared in the process of solid solution

cold deformation and aged under DC with different current densities.Different DC densities were imposed with aging at 450℃for different time to understand influence of aged time and different current densities on electrical properties of Cu-0.33Cr-0.06 Zr alloy.The morphology of crecipitation phase was observed by means of high resolution transmission electron microscope

and the aging kinetics of the alloy was described.The results show that in contrast with those of the alloy aged without DC

the electric conductivity of the alloy aged with 100A/cm current is the lower

while the alloy aged with 300、400A/cm2 current is the higher than aged one without DC.With 400 A/cm2 DC

the electrical conductivity of alloy with aging for 2hours is increased to 49.5 MS/m

approaching the peak value.Cr and CuZr3 precipitates in the alloy aged can be observed.The Avrami equation of phase transformation kinetics and the electrical conductivity equation are derived through the analysis of the relationship between electrical conductivity and volume fraction of precipitates.