热轧工艺对Cu-Cr-Zr合金力学性能和电学性能的影响  

Effect of hot rolling process on mechanical properties and electrical properties of Cu-Cr-Zr alloy

作　　者：吴一凤[1] 夏承东[1,2] 汪明朴[1,3] 张婉[1] 张睿[1] 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083 [2]铜陵有色金属集团控股有限公司有色金属加工研究所,安徽铜陵244001 [3]中南大学有色金属材料科学与工程教育部重点实验室,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2013年第3期930-935,共6页Journal of Central South University:Science and Technology

基　　金：安徽省科技攻关计划项目(08010201026)

摘　　要：应用热轧在线淬火和随后的形变热处理相结合的工艺制备Cu-Cr-Zr合金板材,通过显微硬度、电导率、金相和TEM测试手段分析合金在加工制备过程中性能和组织的变化。研究结果表明:合适的热轧在线淬火工艺只需一次加热便能完成均匀化和快速热轧-淬火处理,达到在线固溶的目的;经热轧在线淬火工艺处理的合金组织细小、均匀,为后续的冷加工和时效处理提供良好的组织准备;于920℃热轧在线淬火能更好地满足实际生产和综合性能的要求。当热轧温度为920℃时,热轧在线淬火后的Cu-Cr-Zr合金,经80%冷轧并在450℃时效30min后其硬度和电导率分别可达180和80.1%IACS。Strips of Cu-Cr-Zr alloy were manufactured by online hot rolling-quenching process and subsequent thermo-mechanical treatments.To optimize the manufacturing process which was suitable for commercial production of the alloy with best combination of strength and conductivity,the properties and microstructure of the alloy were investigated by measurements of hardness and electrical conductivity,and observations of optical microscopy（OM）and transmission electron microscopy（TEM）.The results show that online hot rolling-quenching process only needs heating treatment once to finish homogenization and online quenching and achieves on-line solution treatment.Fine microstructure can be obtained in the process of online hot rolling-quenching,and a good microstructure can be provided for subsequent cold working and heat treatment.After online hot rolling-quenching at different rolling temperatures,the variations in hardness and electrical conductivity of Cu-Cr-Zr alloy are studied during aging,and the results show that 920℃is the optimum hot rolling temperature.After online hot rolling-quenching at 920℃and cold rolling with 80%reduction and then aging at 450℃for 30 min,the hardness and electrical conductivity of the alloy reach 180 and 80.1%IACS, respectively.

关 键 词：CU-CR-ZR合金 高强高导合金 热轧 在线淬火 

分 类 号：TG146[一般工业技术—材料科学与工程]