Ti-25Cu-25Zr Filler Metal and Pure Titanium Brazed Process

Abstract:

Three-layer Ti-Cu-Zr filler metal was developed by explosive cladding and rolling, and the brazing foil of 0.2 mm thickness can be got. The properties of Ti-25Cu-25Zr brazing titanium were studied. The diffusion and contact reaction between the filler metal and titanium base metal was analyzed according to the TLP (Transient Liquid Phase Diffusion Bonding) principle, and the relationship between the holding time and the strength of brazed joint has been got. The results show that when the holding time is less than 1.0 s, the rupture load will below 600 N due to the un-completely diffusion and reaction between the filler metal and the titanium base metal, and a rupture occurs on the brazed joint; comparatively, if the holding time is more than 1.0 s, the rupture load reaches to 700 N, the joint strength can be improved because of the obviously diffusion and reaction happened between the filler metal and the titanium base metal, and the rupture occurs on the heat-affected zone of the titanium. The joint strength would be getting the unity, when the holding time is within the range of 1.0 ~ 4.0 s

Key words:filler metal; brazed; titanium; Ti-25Cu-25Zr