Welded bonding of aluminium and copper

摘要

System designed to bond aluminium and copper in a permanent condition, particularly for locomotive conductors which gives not only a better performance than pressure bonding or other conventional methods, but also means that conductors can be made largely of aluminium with economy on the use of expensive copper. On the surface of the copper, or its alloy, a silver solder (e.g. LAg 25 cd) is laid using tungsten inert gas welding or gas welding. Then a layer of Al Si 12 is applied, using tungsten inert gas welding through alternating current, on the silver solder. Then through tungsten inert gas welding the aluminium is bonded to the copper clad surface with a filler material such as Al Mg 5, Al 99.5 or Al Si 12. The resulting bond is permanent, and has a better performance than pressure bonding, screwing, soldering or other methods.