热处理对Cu-0.23Be-0.84Co合金性能和组织的影响  

Effects of Heat Treatment on Microstructure and Properties of Cu-0.23Be-0.84Co Alloy

作　　者：李宁宁[1,2] 宋克兴[1,3,2] 周延军[2,4] 张彦敏[1,3,2] 何霞[1,2] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471023 [2]河南科技大学河南省有色金属材料科学与加工技术重点实验室,河南洛阳471023 [3]河南科技大学有色金属共性技术河南省协同创新中心,河南洛阳471023 [4]西安交通大学材料科学与工程学院,陕西西安710048

出　　处：《河南科技大学学报（自然科学版）》2015年第2期10-13,2-3,共4页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家自然科学基金项目(51345011);河南省杰出人才基金项目(134200510011);河南省科技攻关基金项目(112102210177);教育部团队发展计划基金项目(IRT1234)

摘　　要：利用硬度计、导电仪和金相电子显微镜,分析了固溶和时效对Cu-0.23Be-0.84Co合金性能和组织的影响。研究结果表明:Cu-0.23Be-0.84Co合金经950℃×1 h固溶、480℃×4 h时效处理后,综合性能指标较好,其中,硬度可达117.0HB,导电率达71.6%IACS;在试验范围内,随着固溶温度的升高,晶粒结构形貌相似,未溶物逐渐减少,晶粒尺寸逐渐增大;950℃时,晶粒呈等轴状,大小均匀,固溶较完全;时效后,试验合金内部保留着较清晰的应变孪晶,强化相在晶界处不连续析出、集聚而产生黑色组织,且黑色组织数量随着时效时间的延长不断增多。By means of micro hardness testing,electrical conductivity testing and electron microscope,the effects of heat treatment on microstructure and properties of Cu-0.23Be-0.84Co alloy were analyzed. The results show that after solid solution treatment at 950 ℃ for 1 h and aging at 480 ℃ for 4 h,the alloy takes on good comprehensive properties with hardness 117 HB and electric conductivity 71. 6% IACS. In the scope of the tests,with the increase of the solution temperature,the grain structures are similar,the undissolved substance reduces gradually and the grain size increases. When the temperature is 950 ℃,solid solution is complete and the grains are equiaxed and uniform. The twin crystal generated by cold deformation in the tested alloy is still clearly visible after heat treatment. The strengthening phase precipitates discontinuously in the grain boundary and results in black tissue. The number of black organizations increase with aging time extension.

关 键 词：Cu-Be-Co 合金 热处理 硬度 导电率 显微组织 

分 类 号：TG146.1[一般工业技术—材料科学与工程]