摘要
采用扫描电镜、透射电镜、万能电子试验机、数字式微欧计等分析手段,研究了不同冷轧变形量和热处理工艺对高强高导Cu-Cr-Zr-Ag合金显微组织与性能的影响。结果表明,合金冷轧后,其显微组织中出现大量的位错和胞状结构,经500℃/1 h时效处理,合金基体中随机析出了弥散的第二相。随着冷轧变形量逐渐增大,合金抗拉强度不断升高,最高值可达632 MPa,而延伸率略有降低。时效态合金的断口形貌呈现出大量的韧窝,其断裂方式为微孔缩聚型塑性断裂。
The influences of cold working and heat treatment on microstructures and properties of Cu-Cr-Zr-Ag alloy with high strength and high conductivity were studied by SEM, TEM, electronic universal testing machine and digital micro-ohm meter. Experimental results show that, after cold rolling, a large number of dislocations and cell structures appear in the microstructure of the alloy. The second phase precipitates are randomly dispersed in the matrix, when the alloy is aged at 500℃ for 1 hour. The tensile strength increases with the increase of cold rolling, and the highest tensile strength value is 632 MPa, while the elongation drops a little. The fracture surface of the aged alloy exhibits a large number of dimples and the fracture mode of the alloy is micro-porous condensation plastic fracture.
出处
《贵金属》
CAS
CSCD
北大核心
2014年第1期48-51,55,共5页
Precious Metals
基金
国家自然科学基金项目(51164015)
对外科技合作计划省院省校专项(2012IB002)
昆明市科技创新团队项目(2012-01-01-A-R-07-0005)
