Patent application number | Description | Published |
20100151273 | ALUMINIUM ALLOY BRAZING SHEET PRODUCT - The invention relates to an aluminum alloy brazing sheet including: a thin covering material layer, a core material layer, and an Al—Si alloy brazing material layer as an intermediate material interposed between the thin covering material and the core material. The thin covering material and the core material being of aluminum alloys having a solidus temperature higher than a liquidus temperature of the brazing material so that the molten brazing material seeps onto a surface of the thin covering material when the brazing material is molten in a brazing operation. The Al—Si alloy brazing material contains from 0.01 to 0.09% mg, and the aluminum alloy brazing sheet has a total Mg-content of less than 0.06%. | 06-17-2010 |
20110111254 | ALUMINIUM BRAZING SHEET MATERIAL - A brazing sheet material for CAB brazing without applying flux. The brazing sheet material including an aluminum core alloy layer provided with a first brazing clad layer material on one or both sides of the aluminum core layer and at least one second brazing clad layer material positioned between the aluminum core alloy layer and the first braze clad layer material. The second brazing clad layer material is an Al—Si alloy brazing material having 5% to 20% Si and 0.01% to 3% Mg, and the first brazing clad layer material is an Al—Si alloy brazing material having 2% to 14% Si and less than 0.4% Mg. Also disclosed is a brazed assembly manufactured in a brazing operation. | 05-12-2011 |
20110198392 | Process for Fluxless Brazing of Aluminium and Brazing Sheet for Use Therein - This relates to a process for controlled atmosphere brazing including, brazing an aluminium alloy without flux in a controlled atmosphere, while using brazing sheet including an aluminium alloy core upon which on at least one side a layer of filler alloy is clad. The filler clad layer has an inner-surface and an outer-surface, the inner-surface is facing the core and the outer-surface is devoid of any further metallic based layers. The filler alloy has a composition which is Na-free, Li-free, K-free, and Ca-free, and includes, in wt. %: Si 3% to 15%, Mg 0.05% to 0.5%, one or more elements selected from the group of: (Bi 0.03% to 0.2%, Pb 0.03% to 0.2%, Sb 0.03% to 0.2%, and the sum of these elements being 0.2% or less), Fe 0 to 0.6%, Mn 0 to 1.5%, the balance aluminium and incidental impurities. | 08-18-2011 |
20110204124 | PROCESS FOR FLUXLESS BRAZING OF ALUMINIUM AND BRAZING FILLER ALLOY FOR USE THEREIN - This relates to a process for controlled atmosphere brazing including, brazing an aluminium alloy without flux in a controlled atmosphere, while using brazing sheet including an aluminium alloy core upon which on at least one side a layer of filler alloy is clad, the filler clad layer having an inner-surface and an outer-surface, the inner-surface is facing the core, and wherein the filler alloy has a composition which is Na-free, Li-free, K-free, and Ca-free, and including, in wt. %: Si 3% to 15%, Cu 0.3% to 5%, Mg 0.05% to 1%, one or more elements selected from the group of: Bi, Pb, and Sb, and the sum of these elements being 0.35% or less, Fe 0 to 0.6%, Mn 0 to 1.5%, the balance aluminium. | 08-25-2011 |
20130306714 | ALUMINIUM BRAZING SHEET MATERIAL FOR FLUXLESS BRAZING - A brazing sheet material including a core alloy layer bonded on at least one side with an aluminium brazing clad layer or layers forming a filler material of a 4000-series aluminium alloy. The core layer is made from an aluminium alloy having (in wt. %): Mg 1.0 to 3.0, Mn 0 to 1.8, Cu 0 to 0.8, Si 0 to 0.7, Fe 0 to 0.7, optionally one or more elements selected from the group (Zr, Cr, Hf, T), Zn 0 to 0.5, impurities and aluminium. The filler material forms a 4000-series aluminium alloy further including one or more wetting elements selected from Bi 0.03-0.5, Pb 0.03-0.5, Sb 0.03- 0.5, Li 0.03-0.5, Se 0.03-0.5, Y 0.03-0.05, Th 0.03-0.05, wherein the sum of these elements being 0.5% or less. | 11-21-2013 |
20140034713 | FIN STOCK MATERIAL - A fin stock material from an 3xxx-series aluminium alloy and including at least 0.5% to 2.0% Mn, and furthermore a purposive addition of one or more wetting elements selected from the group of: Bi 0.03% to 0.5%, Pb 0.03% to 0.5%, Sb 0.03% to 0.5%, Li 0.03% to 0.5%, Se 0.03% to 0.5%, Y 0.03% to 0.05%, Th 0.03% to 0.05%, and the sum of these elements being 0.5% or less, with the remainder including aluminium and tolerable impurities. Also provided is a method for manufacturing a heat exchanger assembly incorporating such a fin stock material. | 02-06-2014 |
20140054019 | EXTRUDED 1XXX-SERIES ALUMINIUM ALLOY TUBE PRODUCT - An aluminium alloy extruded tube product for a heat exchanger assembly and made from an 1xxx-series aluminium alloys and including furthermore a purposive addition of one or more wetting elements selected from the group of: Bi 0.03% to 0.5%, Pb 0.03% to 0.5%, Sb 0.03% to 0.5%, Li 0.03% to 0.5%, Se 0.03% to 0.5%, Y 0.03% to 0.05%, Th 0.03% to 0.05%, and the sum of these elements being 0.5% or less. | 02-27-2014 |
20140246483 | ALUMINIUM ALLOY SHEET PRODUCT OR EXTRUDED PRODUCT FOR FLUXLESS BRAZING - An aluminium alloy sheet product or extruded product for fluxless brazing, including an aluminium alloy core having on at least one face an aluminium filler clad layer containing 4% to 15% of Si, the filler clad layer having an inner-surface and an outer-surface, the inner-surface is facing the aluminium alloy core and the outer-surface is facing a coating layer of 2 to 45 mg/sq.m of Bi or of a Bi-based alloy. Furthermore, a method of brazing a brazed assembly incorporating at least one member made from the brazing sheet material. | 09-04-2014 |