Metal treatment – Process of modifying or maintaining internal physical... – Chemical-heat removing or burning of metal
Patent
1986-09-25
1989-01-17
Dean, R.
Metal treatment
Process of modifying or maintaining internal physical...
Chemical-heat removing or burning of metal
148410, C22F 110
Patent
active
047986336
ABSTRACT:
A process for heat treating certain nickel-chromium-iron alloys is disclosed which involves annealing the alloys over the temperature range of 1750.degree. F. to 2150.degree. F., preferably in a continuous annealing furnace, for short periods of time, such as 30 minutes to 2 hours, the time being sufficient to precipitate carbides at the alloy grain boundaries. The alloys are useful in nuclear reactor environments.
REFERENCES:
patent: 3573901 (1971-06-01), Economy
patent: 3574604 (1971-04-01), Copson et al.
"A Stress Corrosion Cracking Evaluation of Inconel 690 for Steam Generator Tubing Applications", G. P. Airey, A. R. Vala and R. G. Aspden, pp. 436-448, published Mar. 24, 1981.
Crum James R.
Mankins William L.
Martin James M.
Sarver Jeffrey M.
Dean R.
INCO Alloys International, Inc.
Kenny Raymond J.
Mulligan, Jr. Francis J.
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