Metal treatment – Compositions – Heat treating
Patent
1980-12-02
1982-08-24
Skiff, Peter K.
Metal treatment
Compositions
Heat treating
148 36, C21D 908
Patent
active
043459528
ABSTRACT:
Tubes and method of manufacturing tubes from alloyed steel adapted to be welded for underwater hydrocarbon pipelines having high ductility at low temperatures. A low carbon alloyed steel containing less than 0.08% carbon and with at the most 0.30% silicon, also containing manganese and a metal generating special carbides such as molybdenum, niobium, vanadium and like-acting substances, is cast in a centrifugal casting mould after which the centrifugally cast tube is subjected to controlled cooling and a thermal treatment. Tubes so constructed may be used for drilling tubes, tubes for underwater pipelines and tubes for the construction of drilling platforms at sea in cold regions and applications requiring high ductility at low temperature.
REFERENCES:
patent: 3954133 (1976-05-01), Miyaoka
patent: 3960612 (1976-06-01), Kaku et al.
patent: 4030944 (1977-06-01), Sommer et al.
patent: 4043807 (1977-08-01), Kirman
Listhuber et al, "High-Strength Pipe Steels", Metal Science & Heat Treatment, Sep.-Oct. 1975, vol. 17, pp. 1012-1017.
"High Strength Steels Reach a New Plateau of Quality", Iron Age, Feb. 10, 1975, pp. 48 and 49.
Moxley, "Centrifugal Casting of Steel", Transactions of the ASME, Oct. 1944, pp. 607-614.
Herzog Eugene
Rouyer Robert M. L.
Royer Alain L. A.
Pont-A-Mousson S.A.
Skiff Peter K.
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