摘要
分别采用低温轧制和常温轧制技术制备高强高导Cu−0.5Cr(质量分数,%)合金。研究Cu−0.5Cr合金经低温轧制/常温轧制和时效处理后的显微组织、力学性能和导电性能。研究结果表明,在低温轧制合金中可见明显的位错缠结。经低温轧制和时效处理后,合金中Cr颗粒尺寸更加细小,呈弥散分布。低温轧制合金的最大硬度为HV 167.4,显著高于常温轧制合金的。低温轧制合金在450℃经120 min时效处理后达到最佳力学性能。低温轧制Cu−0.5Cr合金在450℃经120 min时效处理后电导率达到92.5%IACS,略高于常温轧制合金的。
Cu−0.5wt.%Cr alloy with high strength and high conductivity was processed by cryorolling(CR)and room temperature rolling(RTR),respectively.The microstructure,mechanical property and electrical conductivity of Cu−0.5Cr alloy after CR/RTR and aging treatment were investigated.The results indicate that obvious dislocation entanglement can be observed in matrix of CR alloy.The Cr particles in the alloy after CR and aging treatment possess finer particle size and exhibit dispersive distribution.The peak hardness of CR alloy is HV 167.4,significantly higher than that of RTR alloy.The optimum mechanical property of CR alloy is obtained after aging at 450℃ for 120 min.The conductivity of CR Cu−0.5Cr alloy reaches 92.5%IACS after aging at 450℃ for 120 min,which is slightly higher than that of RTR alloy.
作者
张鹏超
史杰夫
于赢水
孙俊才
李廷举
Peng-chao ZHANG;Jie-fu SHI;Ying-shui YU;Jun-cai SUN;Ting-ju LI(Department of Materials Science and Engineering,Dalian Maritime University,Dalian 116026,China;School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,China;School of Mechanical and Power Engineering,Dalian Ocean University,Dalian 116023,China)
基金
Project(2016YFB0101206)supported by the National Key Research and Development Program of China
Project(3132019328)supported by the Fundamental Research Funds for the Central Universities,China。
关键词
Cu−Cr合金
低温轧制
显微组织
力学性能
电导率
Cu−Cr alloy
cryorolling
microstructure
mechanical property
electrical conductivity
