High strength aluminum alloy fin material for heat exchanger and method for production thereof
US8110051B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2009 |
| Grant date | Feb 7, 2012 |
| Priority date | — |
| Expiry date | Jun 19, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21B2003/001
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
[PROBLEMS] To provide an aluminum alloy fin material for a heat exchanger, which has high strength and high heat conductivity after brazing, and is excellent in the resistance to sagging, erosion and self-corrosion and the in the sacrificial anode effect.[MEANS FOR SOLVING PROBLEMS] A method for producing an aluminum alloy fin material for a heat exchanger which comprises providing a molten aluminum alloy having a chemical composition, in wt %, that Si: 0.5 to 1.5%, Fe: 0.15 to 1.0%, Mn: 0.8 to 3.0%, Zn: 0.5 to 2.5%, with the proviso that the content of Mg as an impurity is limited to 0.05 wt % or less, and the balance: Al and inevitable impurities, casting the molten alloy continuously into a thin slab having a thickness of 5 to 10 mm by the use of a twin belt casting machine, winding up the slab into a roll, cold-rolling the slab into a sheet having a thickness of 0.05 to 2.0 mm, subjecting the sheet to an inter annealing at 350 to 500° C., and cold-rolling the annealed sheet with a cold reduction rate of 10 to 96%, to prepare a sheet having a final thickness of 40 to 200 μm, and optionally subjecting the final sheet to a final annealing (a softening process) at a holding tempera…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.