The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 05, 2008
Filed:
May. 25, 2005
Scott W. Haller, Richmond, VA (US);
Job Anthonius Van Der Hoeven, Haarlem, NL;
Klaus Vieregge, Nauort, DE;
Achim Bürger, Hoehr-Grenzhausen, DE;
Sampath Desikan, Koblenz, DE;
Scott W. Haller, Richmond, VA (US);
Job Anthonius Van Der Hoeven, Haarlem, NL;
Klaus Vieregge, Nauort, DE;
Achim Bürger, Hoehr-Grenzhausen, DE;
Sampath Desikan, Koblenz, DE;
Aleris Aluminum Koblenz GmbH, Koblenz, DE;
Aleris Aluminum Canada S.E.C., Cap-de-la-Madeleine (Quebec), CA;
Abstract
Disclosed is a process for producing an Al—Mn alloy sheet with improved liquid film migration resistance when used as core alloy in brazing sheet, including the steps of: casting an ingot having a composition comprising (in weight percent): 0.5<Mn≦1.7, 0.06<Cu≦1.5, Si≦1.3, Mg≦0.25, Ti<0.2, Zn≦2.0, Fe≦0.5, at least one element of the group of elements of 0.05<Zr≦0.25 and 0.05<Cr≦0.25; other elements <0.05 each and total <0.20, balance Al; homogenisation and preheat; hot rolling; cold rolling (including intermediate anneals whenever required), and wherein the homogenisation temperature is at least 450° C. for a duration of at least 1 hour followed by an air cooling at a rate of at least 20° C./h and wherein the pre-heat temperature is at least 400° C. for at least 0.5 hour.