摘要
通过金相组织观察、SEM、室温单向拉伸实验及导电性能测试等手段,研究了室温拉拔态Cu-CrZr-Mg-Ce合金热处理前后组织性能的变化.结果表明:与室温拉拔态相比,经固溶时效热处理(950℃保温1h,水淬,500℃保温4h,随炉冷却)的Cu-Cr-Zr-Mg-Ce合金组织发生了再结晶及晶粒长大,其抗拉强度为395MPa、屈服强度为247MPa,分别降低了10%和43%;延伸率及导电率分别为30%和92%IACS,分别提高了114%和119%;经热处理后的Cu-Cr-Zr-Mg-Ce合金拉伸断口存在平均尺寸变大的延性韧窝,是典型的韧性断裂,表明合金具有优良的塑性加工性能.
In the present work, microstructures and properties of high strength and high electrical conductivity Cu-Cr-Zr-Mg-Ce alloy before and after heat treatment were investigated by observations of optical microscopy and scanning electron microscopy, and measurements of tensile strength and electrical conductivity. The results showed that recrystallization and grain growth occurred in the solution-treated and aged Cu-Cr-Zr-Mg-Ce alloy（solution-treated at 950℃ for 1 h and quickly quenching into cold water. Subsequently, aged at 500℃ for 1 h and then cooled inside the furnace to room temperature） compared with the drawn alloy. The ultimate tensile strength and the yield strength of the heat treated alloy is 395MPa and 247MPa, reducing by 10% and 43% respectively. However, elongation and conductivity of the heat treated alloy is 30% and 92% IACS, increasing by 114% and 119% respectively. The tensile fracture surface for the heat treated Cu-Cr-Zr-Mg-Ce alloy revealed larger ductile dimples,indicating that the alloy had more excellent plasticity in comparison with the drawn alloy.
作者
陆冠华
甘春雷
刘辉
刘宇宁
王顺成
周楠
宋东福
LU Guanhua GAN Chunlei LIU Hui LIU Yuning WANG Shuncheng ZHOU Nan SONG Dongfu(Guangdong Institute of Materials and Processing , Guangzhou 510650, China Foshan Hua Hong Copper Tube Limited Company, Foshan 528234, China College of Materials Science and Engineering, Hunan University, Changsha 410082, China)
出处
《材料研究与应用》
CAS
2017年第2期62-66,共5页
Materials Research and Application
基金
广东省科技计划项目(2013B010204050)
广东省科技计划项目(2014B070706027)
广东省科技计划项目(2013B010102025)
