TA15钛合金扩散钎焊界面微观组织及性能研究

Study on Microstructure and Property of TA15 Titanium Alloy Diffusion Brazing Joint

采用钛基钎料Ti37.5Zr15Cu10Ni作为中间层对TA15钛合金进行了真空扩散钎焊,对扩散钎焊接头界面微观组织进行了分析,同时测试了接头室温和液氮低温力学性能。试验结果表明:钎料与TA15基体发生了快速的互扩散,焊缝微观组织全部呈针状,接头室温和液氮低温状态下均脆断于焊缝,室温拉伸强度达到基体材料拉伸强度的93.8%。

TA15 alloy is vacuum brazed with Ti37.5Zrl 5Cu10Ni filler metal. The microstructure of in- terface diffusion welding brazing is analyzed. Meanwhile, the mechanical properties of the joint are tested at room temperature and low temperature of liquid nitrogen. The results show that the fast difusion between the solder and the TA15 alloy occurs, and the microstructure of weld is needle like. The joints are brittle fracture in the joint at room temperature and low temperature of liquid nitrogen. The tensile strength of the joints at room temperature reaches 93.8% of the base material.