Aluminum alloy strip manufacturing process for the manufacture of brazed heat exchangers
US6764558B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2001 |
| Grant date | Jul 20, 2004 |
| Priority date | — |
| Expiry date | Nov 15, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K35/286
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to a process to manufacture a clad strip, <1.5 mm thick, intended for the manufacture of brazed heat exchangers, comprising:casting of a plate made of core alloy composed as follows (o by weight):Si<0.8 Fe<0.8 Cu: 0.2-0.9 Mn: 0.7-1.5 Mg<0.4 Zn<0.2 Ti<0.1 other elements <0.05 each and <0.15 in total, the remainder aluminum,homogenization of said plate between 550 and 630° C. for at least one hour,cladding on one or two sides of said blank of a brazing aluminum alloy, preferentially containing 5 to 13% silicon,hot rolling followed by cold rolling of the plated blank to a thickness close to the final thickness,recrystallization annealing of the strip between 300 and 4000C.,strain hardening of the annealed strip to obtain a permanent deformation between 2 and 10% and the final thickness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.