METHOD FOR CONTINUOUSLY CASTING STEEL

METHOD FOR CONTINUOUSLY CASTING STEEL

PROBLEM TO BE SOLVED: To provide a method for continuously casting a steel where, when a partition hardware is installed in a mold, also, a tundish is exchanged, and molten steels of different components are subjected to consecutive continuous casting, the phenomenon that knot parts formed by tempor...

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Hauptverfasser: ISHIWARI MASATOSHI, KAMEDA SUMIHIRO, ISOBE YOSHIMITSU, MATSUBA TORU
Format: Patent
Sprache:eng
Schlagworte:
CASTING
CASTING OF METALS
CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
PERFORMING OPERATIONS
POWDER METALLURGY
TRANSPORTING
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creator ISHIWARI MASATOSHI
KAMEDA SUMIHIRO
ISOBE YOSHIMITSU
MATSUBA TORU
description PROBLEM TO BE SOLVED: To provide a method for continuously casting a steel where, when a partition hardware is installed in a mold, also, a tundish is exchanged, and molten steels of different components are subjected to consecutive continuous casting, the phenomenon that knot parts formed by temporarily stopping the pouring of the molten steels to the mold for installing a partition hardware and the exchange of the tundish are overcooled, is prevented. SOLUTION: The pouring of molten steels 14 to a mold 4 is temporarily stopped, and a partition hardware is installed in the mold, and consecutive continuous casting is performed, the pouring of the molten steels from a tundish to the mold is restarted, further, the drawing of a slab is restarted, thereafter, the positions of knot parts are successively grasped, regarding the respective cooling zones 8 to 13 in the secondary cooling zones 8 to 13, in a period for which the knot parts are passed through, a secondary cooling water quantity is controlled to a cooling water quantity (α×Q) obtained by multiplying a secondary cooling water quantity (Q) calculated from a slab drawing speed by a correction factor α(α
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SOLUTION: The pouring of molten steels 14 to a mold 4 is temporarily stopped, and a partition hardware is installed in the mold, and consecutive continuous casting is performed, the pouring of the molten steels from a tundish to the mold is restarted, further, the drawing of a slab is restarted, thereafter, the positions of knot parts are successively grasped, regarding the respective cooling zones 8 to 13 in the secondary cooling zones 8 to 13, in a period for which the knot parts are passed through, a secondary cooling water quantity is controlled to a cooling water quantity (α×Q) obtained by multiplying a secondary cooling water quantity (Q) calculated from a slab drawing speed by a correction factor α(α&lt;1.0), and, in a period for which the knot parts are not passed through, it is controlled to a secondary cooling water quantity (Q) calculated from the slab drawing speed. 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subjects CASTING
CASTING OF METALS
CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
PERFORMING OPERATIONS
POWDER METALLURGY
TRANSPORTING
title METHOD FOR CONTINUOUSLY CASTING STEEL
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