(1. 天津大学 天津市现代连接技术重点实验室，天津 300072；
2. 天津大学 材料科学与工程学院，天津 300072)
摘 要: 在不添加钎料的情况下，使用添加4%ZnCl2和4%SnCl2(质量分数)的中温CsF-AlF3自反应钎剂，对成型法制备的铝蜂窝芯及面板进行自反应钎焊连接。通过调整钎焊温度、保温时间等参数，确定铝蜂窝板的自反应钎焊工艺。使用光学显微镜和扫描电子显微镜及能谱仪对钎焊接头进行组织观察和成分与缺陷分析，测试钎焊接头在不同试验温度下的拉剪强度以及蜂窝板的平压强度。结果表明：钎焊温度为570 ℃、保温时间30 min时，可制备出整体的铝蜂窝板，且钎焊接头连接良好，未出现溶蚀缺陷；蜂窝芯接头的拉剪强度为46~52 MPa，在25~150 ℃范围内，拉剪强度无明显下降，自反应钎焊制备的铝蜂窝板平压强度可达1.75 MPa。
关键字: 自反应钎焊；铝蜂窝；拉剪强度；平压强度
（1. Tianjin Key Laboratory of Advanced Joining Technology, Tianjin University, Tianjin 300072, China;
2. School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China）
Abstract:Aluminum honeycombs prepared by molding method were bonded by self-brazing using the self-brazing CsF-AlF3 flux added with 4% ZnCl2 and 4% SnCl2 (mass fraction) under condition without filler metal. The influences of the brazing temperature and brazing time on the interface microstructure and the aluminum honeycomb properties were investigated. The interface microstructure, chemical compositions and defects of the self-brazing joints were observed and analyzed by scanning electron microscopy and energy dispersive spectroscopy (EDS). The results show that, when the brazing temperature is 570 ℃ and the brazing time is 30 min, the self-brazing can realize the bonding of aluminum honeycomb panels using brazing composite sheet as face panels. The joints are soundly bonded and no corrosions appear, the tensile-shear strength of the brazing joints of honeycomb core is 46-52 MPa, which doesn’t significantly decrease when tested under high temperature conditions，and the average compression strength of the aluminum honeycomb panels is 1.75 MPa.
Key words: self-brazing; aluminum honeycomb; tensile-shear strength; compression strength
