Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Patent
1993-12-16
1997-12-30
Ip, Sikyin
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
148610, 148651, 148676, 148677, C21D 908
Patent
active
057025436
ABSTRACT:
In the fabrication of components from a face centred cubic alloy, wherein the alloy is cold worked and annealed, the cold working is carried out in a number of separate steps, each step being followed by an annealing step. The resultant product has a grain size not exceeding 30 microns, a "special" grain boundary fraction not less than 60%, and major crystallographic texture intensities all being less than twice that of random values. The product has a greatly enhanced resistance to intergranular degradation and stress corrosion cracking, and possesses highly isotropic bulk properties.
REFERENCES:
patent: 1878936 (1932-09-01), Legg
patent: 1911023 (1933-05-01), Kelly
patent: 2184498 (1939-12-01), Hudson
patent: 2237244 (1941-03-01), Wilkins
patent: 2394673 (1946-02-01), Edmunds
patent: 3046166 (1962-07-01), Hartman
patent: 3788902 (1974-01-01), Shapiro et al.
patent: 3841921 (1974-10-01), Shapiro et al.
patent: 3855012 (1974-12-01), Shapiro et al.
patent: 3867209 (1975-02-01), Horiuchi et al.
patent: 4070209 (1978-01-01), Usui
patent: 4354882 (1982-10-01), Greer
patent: 4613385 (1986-09-01), Thomas et al.
patent: 4832756 (1989-05-01), Woodard et al.
patent: 4877461 (1989-10-01), Smith et al.
patent: 5017249 (1991-05-01), Smith et al.
patent: 5017250 (1991-05-01), Ashok
patent: 5039478 (1991-08-01), Sankaranarayanan
Patent Abstracts Of Japan, vol. 11, No. 229(C-436) 25 Jul. 1987 & JP,A,62 040 336 (Mitsubishi Metal Corp) 21 Feb. 1987.
Patent Abstracts Of Japan, vol. 10, No, 230 (C-365) 9 Aug. 1986 & JP,A,61 064 853 (Toshiba Corp) 3 Apr. 1986.
G. Palumbo et al, "On Annealing Twins and CSL Distributions in F.C.C. Polycrystals". Phys. Stat. Sol. a, 131 p. 425 (1992).
G. Palumbo et al.--"Grain Boundary Structure Control for Intergranular Stress--Corrosion Resistance" Mat. Res. Soc. Symp. Proc. Fol 238, p. 311 et sec. (1992).
G. Palumbo et al--"Grain Boundary Design and Control for Intergranular Stress-Corrosion Resistance"--Scripts Metallurgica et Materialia, vol. 25, pp. 1775-1780, (1991).
LandOfFree
Thermomechanical processing of metallic 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 Thermomechanical processing of metallic materials, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermomechanical processing of metallic materials will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-198673