Cu-Cr合金强化机制研究及其对导电性能的影响  

Study on the Strengthening Mechanism and Its Effect on the Conductivity of Cu-Cr Alloy

作　　者：帅歌旺[1] 张萌[2] 黄惠珍[2] 

机构地区：[1]南昌航空工业学院材料科学与工程学院,江西南昌330063 [2]南昌大学材料科学与工程学院,江西南昌330031

出　　处：《铸造技术》2007年第3期396-398,共3页Foundry Technology

基　　金：教育部高等学校骨教师资助计划资助项目(GG-430-11902-1010);江西省自然科学基金资助项目(0050022)

摘　　要：采用真空铸造-固溶处理-冷轧-时效处理工艺制备了Cu-0.8%Cr合金。利用金相显微镜、透射电镜、选取电子衍射、硬度和电导率测试等手段考察了合金在不同处理状态下的组织和性能,定量分析了不同强化方式对合金硬度及导电性能的影响。结果表明:与固溶强化相比,析出强化方法更能有效强化合金,对导电性能影响也更小;形变强化能显著提高合金硬度,但对导电性能几乎无影响;大预变形、短时时效是合金获得较高综合性能的有效手段。Cu-0.8 % Cr alloy was prepared by vacuum casting, solution treatment, cold deformation, and aging treatment. The microstructures and properties of the Cu-0.8%Cr alloy were studied using OM, TEM, SAD and measurement. The effect of different strengthening means on hardness and electrical conductivity of Cu-Cr alloy were quantitatively discussed. The results show that precipitation strengthening is more effective to increase the hardness of Cu-Cr alloy and has lower effect on its electrical conductivity than those of solution strengthening. Cold deformation can significantly improve the hardness of Cu-0. 8% Cr alloy, and has little effect on the electrical conductivity. Larger pre-deformation and shorter aging time are the effective means to obtain a combination of high strength and excellent electrical conductivity for Cu-Cr alloy.

关 键 词：铜铬合金 析出强化 形变强化 电导率 

分 类 号：TG113[金属学及工艺—物理冶金]