Method of heat-treating ductile cast iron pipe

Details Method of heat-treating ductile cast iron pipe Method of heat-treating ductile cast iron pipe

1978-01-26

1979-06-05

Simpson, Othell M.

Metal founding

Process

Shaping liquid metal against a forming surface

164270, 164286, 164298, 266257, B22D 1302, B22D 3300, C21D 908, C21D 500

Patent

active

041571118

ABSTRACT:
A method of heat-treating and, particularly, annealing, a ductile cast iron pipe in the form as centrifugally held against the wall of a centrifugal casting mold. The casting within the mold is heat-treated by introducing a hot gas of elevated temperature into the hollow of the casting. At the initial stage, the casting within the mold is in red-hot condition and, therefore, introduction of the hot gas into the hollow of the casting results in control of the dissipitation of heat energies from the red-hot casting to delay or slow down a cooling rate of the casting.

REFERENCES:
patent: 119682 (1871-10-01), Yielding
patent: 1546532 (1925-07-01), Baily
patent: 2079334 (1937-05-01), Parsons
patent: 2996293 (1961-08-01), Fallon

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