Heating of metal alloy sheet by thermal conduction

Details Heating of metal alloy sheet by thermal conduction Heating of metal alloy sheet by thermal conduction

2005-05-10

2005-05-10

Wyszomierski, George (Department: 1742)

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

C072S709000

Reexamination Certificate

active

06890394

ABSTRACT:
A method is disclosed for heating a cold worked sheet of superplastically formable metal composition to recrystallize its microstructure to a formable condition and/or to heat the sheet to a temperature for an immediate forming operation. The sheet is placed between two electrical resistance heated platens maintained at a suitable temperature for recrystallizing and/or heating the metal sheet through its side surfaces. In a preferred embodiment a critical gap is maintained between the platens and the sheet to permit rapid conductive heating of the expanding sheet without marring its surfaces.

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patent: 5410132 (1995-04-01), Gregg et al.
patent: 6211497 (2001-04-01), Matsen et al.
patent: 6253588 (2001-07-01), Rashid et al.
patent: 6547895 (2003-04-01), Bradley et al.

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