Metal treatment – Compositions – Heat treating
Patent
1986-01-02
1987-12-01
Dean, R.
Metal treatment
Compositions
Heat treating
148162, C22F 110
Patent
active
047102373
ABSTRACT:
A method for a thermal treatment of a nickel based alloy, characterized in that said nickel based alloy for a material which will be subjected to a high-temperature and high-pressure water or vapor comprises, in terms of % by weight, 58% or more of Ni, 25 to 35% of Cr, 0.003% or less of B, 0.012 to 0.035% of C, 1% or less of Mn, 0.5% or less of Si, 0.015% or less of P, 0.015% or less of S, and the residue of Fe and usual impurities; in a first thermal treatment process, said nickel based alloy is heated and retained at a temperature of T.degree. C. to (T+100).degree.C. and is cooled at a cooling rate of a furnace cooling rate or more; and in a second thermal treatment process, said nickel based alloy is then retained at a temperature of 600.degree. to 750.degree. C. and at a temperature within a sensitization recovery range for a period of 0.1 to 100 hours and is cooled at a cooling rate of said furnace cooling rate or more.
REFERENCES:
patent: 3573901 (1971-04-01), Economy
Nuclear Technology, vol. 55, Nov. 1981, pp. 436-448, article entitled "A Stress Corrosion Cracking Evaluation of Inconel 690 for Steam Generator Tubing Applications", by G. P. Airey et al.
Inoue Mamoru
Kawaguchi Katsuji
Minami Takao
Nagano Hiroo
Okada Yasutaka
Dean R.
Mitsubishi Jukogyo Kabushiki Kaisha
Sumitomo Metal Industries Ltd.
LandOfFree
Method for thermal treatment of nickel based alloy materials does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for thermal treatment of nickel based alloy materials, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for thermal treatment of nickel based alloy materials will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1929478