银铜箔轧制用银铜板的退火组织与性能

Microstructure and properties of annealed silver-copper plate for silver-copper foil rolling

采用光学显微镜、电子背散射衍射技术、维氏硬度计和电化学工作站等研究了轧制银铜板在退火过程中的组织、织构演变规律及其对维氏硬度、耐腐蚀性能的影响。结果表明:轧制银铜板退火时,晶粒形态由轧态的长条状演变为等轴晶组织,且平均晶粒尺寸增大,织构类型由铜型织构、黄铜型织构、S织构和R织构等形变织构演变为立方织构和{025}<001>等退火织构;随退火温度的升高,银铜板维氏硬度减小,银铜板小角度晶界含量降低,∑3晶界含量升高,耐腐蚀性能先减弱后增强。银铜板在300℃保温10 min时,立方织构含量最多,硬度为60 HV0.3,耐腐蚀性能较好。

Evolution of microstructure and microtexture, and their effects on Vickers hardness and corrosion resistance of rolled silver-copper plate during the annealing process were studied by means of optical microscope, electron backscattering diffraction technique, Vickers hardness tester and electrochemical workstation. The results show that during the annealing process, the average grain size increases. Moreover, the grain morphology evolves from rolled strip grains to equiaxed grains, at the same time, the texture type develops from deformed texture(copper texture, brass texture, S texture and R texture) to annealed texture(cube texture and {025}<001> texture). With the increase of annealing temperature, the content of small-angle grain boundary and the Vickers hardness of the silver-copper plate decrease, simultaneously, the content of ∑3 grain boundary increases, and the corrosion resistance first weakens and then increases. The content of cube texture is capable of reaching the highest when the silver-copper plate is heated at 300 ℃ for 10 min. Under this condition, the silver-copper plate exhibits excellent corrosion resistance, and the Vickers hardness reaches 60 HV0.3.