Metal treatment – Compositions – Heat treating
Patent
1981-07-06
1983-09-20
Skiff, Peter K.
Metal treatment
Compositions
Heat treating
75129, 148 12F, 148 36, 148 39, C22C 3812
Patent
active
044053800
ABSTRACT:
High strength, low alloy steel is produced, preferably as a hot rolled article (e.g. strip), to have a rimmed skin of essentially ferrite while having a main body or core which is aluminum-killed and comprises, for superior mechanical properties including yield strength, a suitable quantity of columbium and/or vanadium. The carbon, manganese and sulfur contents of the base metal, which provides the skin and plus the addition, the core, are preferably limited to provide special results as low alloy steel and also, by the same limitations, to provide auto sulfide shape control and thus to avoid unwanted directionality regarding toughness and bendability. The steel is made by pouring a mold 80-95% full of the base composition, then allowing the steel to rim for several minutes, and after a shell has solidified, continuing to pour while adding Al and Cb or V to the teemed stream, thereby providing an ingot with the above killed core, which can be hot reduced as desired.
REFERENCES:
patent: 2389516 (1945-11-01), Kinnear
patent: 3414042 (1968-12-01), Behrens et al.
patent: 3556866 (1971-01-01), Gibbs et al.
patent: 3593774 (1971-07-01), Gribble et al.
patent: 3725049 (1973-04-01), Satoh et al.
patent: 3865643 (1975-02-01), Bales et al.
patent: 3963531 (1976-06-01), Elias et al.
patent: 3988174 (1976-10-01), Kawano
patent: 4092179 (1978-05-01), Charpentier et al.
patent: 4141761 (1979-02-01), Abraham et al.
patent: 4142922 (1979-03-01), Abraham et al.
Metals Handbook, 9th Edition, vol. 1, "Properties and Selection: Irons and Steels", 1978, pp. 112, 114-116, 556-560.
Abraham John K.
Demianczuk Dionisyj W.
Franklin Joseph E.
Griffith Cecil B.
Thomas Jerry D.
Republic Steel Corporation
Skiff Peter K.
LandOfFree
High strength, low alloy steel with improved surface and mechani does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High strength, low alloy steel with improved surface and mechani, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High strength, low alloy steel with improved surface and mechani will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-586221