Abstract：In order to achieve high-quality brazing connection of high-temperature titanium alloy Ti65, three components of Ti-based amorphous brazing filler with Zr as the variable were prepared using vacuum rapid quenching technology, and Ti65 was brazed according to the optimal welding process of the three brazing filler. The microstructure and element distribution characteristics of three types of brazing joints were analyzed using scanning electron microscopy, and the tensile properties of the joints at room temperature and 650 ℃ were compared and analyzed. The experimental results show that the three types of brazing filler have good surface quality and no pores， and can achieve Ti65 brazing connection. The joint is mainly composed of layered Widmannstatten structure, but there is a continuous compound phase in Ti-13Zr-Cu-Ni brazing filler. The mechanical performance results show that the room temperature and 650 ℃ high temperature tensile properties of the three brazing filler can reach over 90% of the tensile strength of the base material. The room temperature tensile strength of Ti-13Zr -Cu-Ni brazing material is slightly lower, and the fracture mainly occurs at the joint interface, exhibiting brittle fracture. The fracture of the Ti-Cu-Ni brazing material room temperature and 650 ℃ high temperature tensile sample occurs at the base material, showing mechanical properties equivalent to the matrix.
2024, Vol. 31 