采用Ti-15Cu-15Ni真空钎焊Ti_3AI基合金

Vacuum brazing of Ti_3Al-based alloy using Ti-15Cu-15Ni brazing filler

采用Ti-15Cu-15Ni钎料在960℃/1min、960℃/10min和960℃/1h三种规范下钎焊Ti3Al基合金(TD3)。实验结果表明,随着保温时间的延长,钎缝中心的残余钎料逐渐变少,当保温时间为1h时,钎缝中心区出现了再生的针状α相,残余钎料扩散完全。钎缝中Ti与Ni和Cu发生反应生成相应的NiTi2和CuTi3相。

Brazing of Ti3Al-based alloy （TD3）using Ti-15Cu-15Ni brazing filler was carried out at 960℃ for lmin, 10min and 1h.The results showed that the residual brazing filler became less gradually with the prolonging of the holding time.The needle-like α phase appeared at the central part of the joint brazed at 960 ℃ for 1 h ,and the residual brazing filler disappeared at the joint.In the brazing seam the element Ti reacted with elements Ni and Cu and formed NiTi2 phase and CuTi3 phase respectively.