The Paton Welding Journal, 2013, #2, 56-58 pages
DEVELOPMENT OF THE TECHNOLOGY FOR BRAZING OF TITANIUM ALLOYS USING FILLER ALLOYS BASED ON THE Al-Mg SYSTEM
E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine
It should be noted that, despite a large number of the investigations performed on brazing of titanium using aluminium filler alloys, brazing of titanium by using the Al-Mg system based filler alloys have not received acceptance in the territory of Eastern Europe and, particularly, in Ukraine. However, the quantity of publications covering developments of new aluminium alloys for brazing of titanium alloys is growing, this being indicative of the demand of the industry for commercial medium-melting point filler alloys for brazing of titanium and its alloys. The purpose of the present study was to develop the technology for brazing of titanium alloys by using the Al-Mg system based filler alloys. Presented are the investigation results on brazing of the samples of titanium alloy VT1-0 using aluminium filler alloys by radiation heating in vacuum. Structural and chemical heterogeneity of the brazed joints was investigated. It was found that aluminium filler alloys based on the Al-Mg system are suitable for producing sound brazed joints on titanium alloys. The dense and defect-free joints were made in brazing of models of sections of lamellar-ribbed heat exchangers by using filler alloy AMg6, the strength of the joints being sufficient for this type of the items. Brazing filler alloy TiBrazeAl-665 was found to be suitable as well. 4 Ref., 3 Figures.
brazing, brazing filler alloys, titanium alloys, aluminium alloys, lamellar-ribbed heat exchangers, honeycomb structures, microstructure, mechanical properties
1. Lashko, N.F., Lashko, S.V. (1977) Brazing of metals. Moscow: Mashinostroenie.
2. Shapiro, A.E., Flom, Y.A. (2007) Brazing of titanium at temperatures below 800 °C: Review and prospective applications. http://www.titanium-brazing.com/publications. DVS-Manuscript_1020-Copy2-19-07.pdf
3. Kimbal, C.E. (1980) Acoustic structures in producing titanium honeycomb acoustic cylinders. Welding J., 59(10), 26-30.
4. Nesterov, A.F., Dolgov, Yu.S., Telkov, A.M. (1985) Brazing of titanium structures with aluminium filler alloys. In: Filler alloys for brazing of modern materials. Kiev: PWI, 39-45.