Recrystallization of metal alloy sheet with convection and infrared radiation heating
US6835254B2 · kind B2 · utility
2Cited by
4References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 9, 2002 |
| Grant date | Dec 28, 2004 |
| Priority date | — |
| Expiry date | May 29, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22F1/04
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method is disclosed for heating a cold worked sheet of superplastically formable metal composition to recrystallize its microstructure to a suitably formable condition and further to heat the sheet to a temperature for an immediate forming operation. The method utilizes a combination of hot air convection heating and infrared radiation to rapidly accomplish the heating. High temperature infrared heating elements provide most of the energy during an initial high heating rate phase and then those elements are shut off and heating is completed with controlled temperature hot air to prevent overheating of the sheet metal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.