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Contents of the issue
Brazing as a promising method of producing permanent joints
E.O. Paton Electric Welding Institute of the NAS of Ukraine, 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.
The paper presents practical results of developments and investigations in the field of brazing various materials: aluminium, copper, high-temperature nickel and titanium alloys, as well as promising materials based on Ni3Al and ~-TiAl intermetallics, and steels of different grades. Data on reactive-flux brazing of aluminium thin-walled structures in a controlled gas environment are given. A lot of attention is paid to producing brazed joints from dissimilar materials: Mo+C (stainless steel), W+Cu, hard alloy material (VK 20)+steel, Al+steel, etc. Effective application of the developed technologies of brazing high-temperature nickel and titanium alloys in fabrication of critical structures for high temperature applications and results of mechanical testing of brazed joints are shown. The developed brazing filler metal and technologies of high-temperature vacuum brazing were applied to produce joints from new generation alloys based on nickel and titanium aluminides, which have been successfully tested for long-term strength under the conditions of higher temperature and continuously applied stresses. 17 Ref., 1 Tabl., 14 Fig.
Keywords: brazed joints, brazing filler metals, vacuum, reactive-flux, gas-flame brazing, high-temperature nickel, titanium alloys, long-term strength, dissimilar materials, aluminium, copper alloys
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