Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Patent
1996-09-05
1998-12-08
Phipps, Margery
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
148538, C21D 602, C21D 800, C22F 110
Patent
active
058463534
ABSTRACT:
A process for the production of a body of material stable at high temperatures. In this process, the body of material is formed by solution annealing and subsequent precipitation hardening of a hot work-hardened starting body composed of an iron-nickel superalloy of the type IN 706 provided in a furnace. The body of material is distinguished by a particularly high ductility in combination with high hot strength if the solution-annealed starting body is cooled from the annealing temperature envisaged for the solution annealing to the temperature envisaged for the precipitation hardening at a cooling rate of between 0.5.degree. and 20.degree. C./min.
REFERENCES:
patent: 4445943 (1984-05-01), Smith, Jr. et al.
patent: 5415712 (1995-05-01), Thamboo
"Die Ursachen der hohen Warmfestigkeit von Superlegierungen", Metall--36 Jahrgang--Heft 5, May 1982, pp. 531-535.
"Nickel und Nickellegierungen", K.E. Volk, 1970, pp. 248-257.
"Heat Treatment of 706 Alloy for Optimum 1200.degree. F. Stress-Rupture Properties", Moll, et al., Metallurgical Tansactions, vol. 2, Aug 1971, pp. 2153-2160.
Nazmy Mohamed
Staubli Markus
Asea Brown Boveri AG
Phipps Margery
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