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采用固液浇注和拉拔制备了银包铜复合细丝,研究了不同退火温度对界面及力学性能的影响、反复弯曲载荷条件下材料结合性能与材料硬度及界面区域微观组织的变化规律。利用光学显微镜、扫描电镜和X射线能量色散谱,研究了界面区域的微观形貌、元素分布与界面结合性能的关系。结果表明:两侧沿界面扩散区域其宽度随退火温度升高而增加。在400~500℃,保温60 min真空热处理,界面具有良好的结合性能。
The effects of different annealing temperature on the interface and mechanical properties, the bonding properties of the material under repeated bending load, the hardness of the material and the microstructure of the interface were investigated by solid-liquid casting and drawing. Using optical microscope, scanning electron microscopy and X-ray energy dispersive spectroscopy, the interfacial microstructure, elemental distribution and interfacial bonding properties were studied. The results show that the width of the diffusion region along the interface increases with the increase of annealing temperature. At 400 ~ 500 ℃, 60 min vacuum heat treatment, the interface has a good combination of properties.