Method of producing elongated large-size forged article

Details Method of producing elongated large-size forged article Method of producing elongated large-size forged article

1982-10-29

1983-09-13

Rutledge, L. Dewayne

Metal treatment

Compositions

Heat treating

148 12R, 148 36, 295275, 75126F, 75126J, C21D 800

Patent

active

044040415

ABSTRACT:
A method of producing forged article by casting a molten alloy steel containing 0.02 to 0.15 wt % of niobium and 9 to 12 wt % of chromium in a metal mold to form an ingot and subjecting the ingot to a forging. The ingot is formed to have a diameter greater than the height thereby to prevent generation of eutectic NbC and sedimental crystals.

REFERENCES:
patent: 1150401 (1915-08-01), Talbot
patent: 1734930 (1929-11-01), Weaver
patent: 3139337 (1964-06-01), Boyle et al.
patent: 3151979 (1964-10-01), Carney et al.
patent: 4026727 (1977-05-01), Finkl et al.
patent: 4286986 (1981-09-01), Borneman
Mochel, N. L., "Steels for Turbine Rotor Forgings and their Heat Treatment", Westinghouse Electric & Mfg. Co., Philadelphia, Oct. 1937, pp. 265-269.

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