(1. 中南大学 材料科学与工程学院，长沙 410083；2. 江西理工大学 材料与化学工程学院，赣州 341000)
摘 要: 通过对Cu-1.0Cr-0.2Zr合金固溶处理、冷轧以及随后的时效处理工艺，研究形变及时效过程对材料力学性能、导电性能及其组织结构的影响规律。结果表明：研究合金具有很强的时效强化效应；时效前的预冷变形能显著提高Cu-1.0Cr-0.2Zr合金的力学性能而保持较高的导电性；在最佳的形变热处理工艺条件下其合金的抗拉强度和屈服强度分别达到了527.0和487.0 MPa，伸长率为12.3%，电导率为82.0%IACS。合金力学性能的提高与电学性能的小幅降低主要是由时效过程的固溶体贫化、基体的回复与再结晶以及新相的析出三个因素控制，其中细小弥散均匀分布的析出相是获得高的力学性能和导电性能的重要影响因素。
关键字: Cu-Cr-Zr合金；形变热处理；显微组织；导电性能
（1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;2. School of Materials and Chemistry Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China）
Abstract:The effects of thermo-mechanical heat treatment processing on microstructure and properties of Cu-Cr-Zr alloy were studied. The hot rolled plates were solid solution treated and cold rolled followed by ageing treatments. The different ageing temperatures, ageing times and different reduction ratios of cold-rolled affect the mechanical and electrical properties of the alloy. The results show that the fine chromium and the second phase distributed in matrix were found in matrix. The ageing treatments affect the microstructure, strength and electrical conductivity of the alloy. In optimum treatment, the tensile strength, yield strength, elongation and electrical conductivity are of 527.0 MPa, 487.0 MPa, 14.2% and 82.0% IACS, respectively, which are controlled by recovery, recrystallization and precipitation, moreover, the fine second phase precipitation is the most important factor.
Key words: Cu-Cr-Zr alloy; thermo-mechanical treatment; microstructures; conductivity
