【作者】 李宁宁； 宋克兴； 周延军； 张彦敏；

【Author】 LI Ning-ning;SONG Ke-xing;ZHOU Yan-jun;ZHANG Yan-min;School of Materials Science and Engineering,henan University of Science and Technology;henan Key Laboratory of Advanced Non-ferrous Metals;henan Nonferrous Metal common technology collaborative innovation center;School of Material Science and Engineering,Xi’an Jiaotong University;

【机构】 河南科技大学材料科学与工程学院； 河南省有色金属材料科学与加工技术重点实验室； 有色金属共性技术河南省协同创新中心； 西安交通大学材料科学与工程学院；

【摘要】 本文以制备的低铍Cu-0.23Be-0.84Co合金为研究对象,开展了Cu-0.23Be-0.84Co合金不同温度和时间条件下的固溶、时效处理工艺研究,并研究了冷变形对合金组织和性能的影响;对不同工艺制备的合金的导电率、硬度强度等性能进行了测试,利用透射电子显微镜,研究了该合金的时效微观组织,探索其最佳热处理工艺。研究结果表明:Cu-0.23Be-0.84Co合金的组织性能经950℃×1h固溶后时效发生了明显改变,在后续不同时效温度下,随着时效时间的延长(0.5-8h),合金的硬度先急剧升高(0.5-1h),后基本保持不变或稳定增加(1-4h),在4h达到峰值硬度,随着时效时间的进一步延长,硬度降低(4-8h);而导电率则先稳步增加,并在4h达到峰值71.6%IACS,4h之后有所降低。合金时效前经过一定量的冷变形,可有效提高其性能。更多还原

【Abstract】 This paper is based on the self-made Cu-0.23Be-0.84 Co alloy.The effect of solution treatment and aging of different temperature,time,and cold deformation on the microstructure and properties of Cu-0.23Be-0.84 Co alloy was studied.The electrical conductivity and hardness of the alloy after different process were measured.The microstructure of the alloy was observed and analyzed.The purpose is to explore the best heat treatment process.The results show that the microstructure and properties of Cu-0.23Be-0.84 Co alloy after 950℃×1h solution and follow-up aging change obviously.With the increase of aging time(0.5-8h) at different temperature,the hardness first increases sharply(0.5-1h),and then keeps constantly or increases steadily(l-4h),and reaches to peak hardness at 4h,and with the further extension of aging time hardness decreases(4-8h).While the conductivity increases steadily first,and reaches the peak of 71.6%IACS at 4h,and then decreases.It can effectively improve the properties of the alloy by adding certain amount cold deformation on alloy before aging.更多还原