| 2005 №03 (02) | 2005 №03 (04) |
The Paton Welding Journal, 2005, #3, 13-18 pages
Effect of metallurgical heredity of the AMts alloy semi-finished products on their brazing ability
A.A. Bondarev1, A.V. Lozovskaya1, G.M. Shelenkov2
1E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.2Open Joint Stock Company «M.V. Frunze Sumy Machine-Building Research and Production Enterprise», Sumy, Ukraine
Abstract
Chemical composition and structure of materials applied for manufacture of brazed heat exchanges from alloy AMts have been studied. It is shown that defects in parts can be caused by the use of low-quality extruded billets containing oxide films and cavities in cast metal. The latter are located in sub-surface layers of an ingot and transform into extended oxide films and discontinuities during ingot processing
Keywords: brazing, aluminium alloy AMts, band clad with brazing filler alloy, extruded strip, chemical composition, structure, oxide film, discontinuity, wettability and spreading ability of brazing filler alloy
References
1. Rabkin, D.M. (1986) Metallurgy of fusion welding of aluminium and its alloys. Kiev: Naukova Dumka.2. Manko, G.G. (1968) Brazing and brazing filler alloys. Moscow: Mashinostroenie.
3. Nikitkin, A.M. (1983) Brazing of aluminium and its alloys. Moscow: Mashinostroenie.
4. Smirnov, G.N. (1981) Advanced methods for brazing of aluminium. Moscow: Metallurgiya.