| 摘要 |
The invention relates to a sandwich material for brazing comprising a core layer of a first aluminum alloy and a barrier layer of a second aluminum alloy characterized by that: the first alloy, constituting the core layer contains (in weight %): 0.8-2% Mn, @1.0% Mg, 0.3-1.5% Si, @0.3% Ti, @0.3% Cr, @0.3% Zr, @1.3% Cu, @0.5% Zn, @0.2% In, @0.1% Sn and @0.7% (Fe+Ni), the balance consisting of Al and @0.05% of each of the unavoidable impurities, and that the second alloy, constituting the barrier layer contains (in weight %): @0.2% Mn+Cr, @1.0% Mg, @1.5% Si, @0.3% Ti, @0.2% Zr, @0.3% Cu, @0.5% Zn, @0.2% In, @0.1% Sn and @1.5% (Fe+Ni), the balance consisting of Al and @0.05% of each of the unavoidable impurities, The invention also concerns a method for the manufacture of the sandwich material, a brazed product, such as a heat exchanger comprising the sandwich material and the use of the brazed product at high and low temperatures. |
