Manufacture of iron-chromium-aluminum peeling billet

Details Manufacture of iron-chromium-aluminum peeling billet Manufacture of iron-chromium-aluminum peeling billet

1986-06-30

1988-07-26

Yee, Deborah

Metal treatment

Compositions

Heat treating

148 12EA, C21D 810

Patent

active

047598042

ABSTRACT:
A peeling billet of the type for producing a thin metal foil by a metal peeling process and composed of an aluminum-containing ferritic stainless steel, that is, iron-chromium-aluminum alloy, is manufactured from cast alloy. A casting is forged at an elevated temperature in a manner sufficient to work the metal by an amount equivalent to forging along an axis to produce at least a 50 percent reduction in dimension. The forged billet is annealed at a temperature at least 80 degrees greater than the forging temperature, but not greater than 1100.degree. C., to recrystallize the metal to produce a refined grain microstructure conducive to peeling.

REFERENCES:
patent: 2839396 (1958-06-01), Marsh
patent: 4316743 (1982-02-01), Kawai et al.
patent: 4331631 (1982-05-01), Chapman
patent: 4414023 (1983-11-01), Aggen et al.
American Society for Testing and Materials, "Standard Methods for Determining Average Grain Size", Designation E112-84 (1984).

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