(1. 河南科技大学 材料科学与工程学院，洛阳 471023；
2. 河南科技大学 河南省有色金属材料科学与加工技术重点实验室，洛阳 471023)
摘 要: 对Cu-0.36Cr-0.03Zr合金进行时效处理，研究时效温度和时间对合金性能和组织的影响，借助高分辨透射电镜观察时效析出相的组织形态，并研究不同温度下该合金的时效析出动力学。结果表明：经过时效处理后，析出相弥散分布，提高了合金的显微硬度和导电率，经500 ℃时效2 h后，合金硬度和导电率分别达到153.9 HV和84.54 %IACS；通过微观分析确定在550 ℃时效2 h后合金中存在Cr和Cu4Zr两种析出相；通过对导电率与析出相体积分数关系的分析，确定合金在不同温度下时效的相变动力学Avrami经验方程和导电率方程，并绘制等温转变动力学曲线。
关键字: Cu-0.36Cr-0.03Zr合金；时效处理；组织；相变动力学方程
（1.School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China;
2. Henan Key Laboratory of Advanced Non-ferrous Metals, Henan University of Science and Technology, Luoyang 471023, China）
Abstract:The effects of aging temperature and aging time on the microstructure and properties of Cu-0.36Cr-0.03Zr alloy aged at different temperatures were studied. The morphology of precipitation was observed by means of high resolution transmission electron microscope and the aging kinetics of the alloy was studied. The results show that the precipitates are dispersed and the microhardness and electrical conductivity are enhanced to 153.9 HV and 84.54 %IACS, respectively, due to aging treatment at 500 ℃ for 2 h. There are Cr and Cu4Zr precipitates existing in the alloy aged at 550 ℃ for 2 h through the micro-analysis. The Avrami equation of phase transformation kinetics and the electrical conductivity equation are obtained, while the transformation kinetics curve is drawn through the analysis of the relationship between electrical conductivity and volume fraction of precipitates.
Key words: Cu-0.36Cr-0.03Zr alloy; aging treatment; microstructure; phase transformation kinetics equation
