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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 effect of different cold deformation and heat treatment process on microstructure and properties of high strength and high conductivity Cu-Cr-Zr-Ag alloy was studied by means of scanning electron microscopy, transmission electron microscopy, universal electronic testing machine and digital micro-ohmmeter. The results show that there are a large number of dislocations and cellular structures in the microstructure of the alloy after cold rolling. After aging at 500 ℃ for 1 h, the dispersed second phase is randomly precipitated in the alloy matrix. With the gradual increase of cold rolling deformation, the tensile strength of the alloy continues to rise, the maximum value of up to 632 MPa, while the elongation decreased slightly. The fracture morphology of the aged alloy shows a large number of dimples, the fracture mode is microporous polycondensation plastic fracture.