Method of sequential continuous-casting of different grades of s

Details Method of sequential continuous-casting of different grades of s Method of sequential continuous-casting of different grades of s

1979-06-19

1981-05-26

Baldwin, Robert D.

Metal founding

Process

Shaping liquid metal against a forming surface

164 82, B22D 1106

Patent

active

042692571

ABSTRACT:
The method of sequential continuous-casting of the different grade of steel according to the present invention comprises the steps of: stopping the pouring of a first grade of molten steel into a mold and the drawing of cast slab; immersing a columnar steel stock being circular or polygonal in cross section and equipped with guiding jigs into the substantially center portion of the first grade of molten steel in said mold; forming a solidified phase around said cooling material; and merging said solidified phase in a solidified shell developed from the wall of the mold to form a solidified layer shutting the upper portion off the lower portion of the first grade of molten steel.
According to the method, the pouring the second grade of molten steel is started before the solidified layer for shutting the upper portion off the lower portion of the first type of molten steel as described above and the surface of the first grade of molten steel is solidified completely, and at the same time, the drawing of the cast slab is started again and the change-over to the normal continuous casting of the second grade of molten steel is effected.

REFERENCES:
patent: 3789911 (1974-02-01), Bachuer

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