(1. 中南大学 冶金科学与工程学院,长沙 410083;
2. 苏州有色金属加工研究院,苏州 215026)
摘 要:
关键字: Cu-Cr-Zr-Mg-RE合金;微观组织;电导率;抗拉强度
(1. School of Metallurgical Science and Engineering, Central South University,
Changsha 410083, China;
2. Suzhou Institute for Nonferrous Metals Processing Technology, Suzhou 215026, China)
Abstract:The microstructure of Cu-0.43%Cr-0.17%Zr-0.05%Mg-0.05%RE (mass fraction) alloy was studied by high resolution transmission electron microscopy and optical microscopy. The electrical conductivity, tensile strength and micro-hardness of this alloy after cold rolling and aging treatment were investigated. The results show that the alloy aged at 450 ℃ for 4 h has good combination of physical and mechanical properties. The analyses of HRTEM show that three kinds of chromium-rich phase, such as club-shaped, hexagonal shape and spherical shape exist in the alloy. The zirconium-rich phase and decomposing CrCu2(Zr, Mg) phase are observed at aging temperature of 400 ℃.
Key words: Cu-Cr-Zr-Mg-RE alloy; microstructure; electrical conductivity; tensile strength