METHOD FOR CONTROLLING FLOW OF MOLTEN STEEL IN MOLD, AND METHOD FOR PRODUCING CONTINUOUS CASTINGS

METHOD FOR CONTROLLING FLOW OF MOLTEN STEEL IN MOLD, AND METHOD FOR PRODUCING CONTINUOUS CASTINGS

A method for controlling the flow of a molten steel in a mold, which comprises applying a shifting magnetic field in such a manner as to give a braking force to the exhaust flow from an immersed nozzle, to control the flow rate (u) in the surface of the molten steel to a predetermined rate, when the...

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Hauptverfasser: KONDO TSUNEO, MIZUOKA SEISHI, KUBOTA JUN
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 KONDO TSUNEO
MIZUOKA SEISHI
KUBOTA JUN
description A method for controlling the flow of a molten steel in a mold, which comprises applying a shifting magnetic field in such a manner as to give a braking force to the exhaust flow from an immersed nozzle, to control the flow rate (u) in the surface of the molten steel to a predetermined rate, when the flow rate (u) of the molten steel exceeds 0.32 m/sec, which is a critical flow rate for the phenomenon of catching a powder, applying a shifting magnetic field in such a manner as to rotate the molten steel in the mold in the parallel direction, to thereby control the flow rate of the molten steel to a range of 0.20 to 0.32 m/sec, when the flow rate (u) is less than 0.20 m/sec, which is a critical flow rate for the adhesion of an inclusion, and also is 0.10 m/sec or more, which is a critical flow rate for the formation of a skin in the surface of the molten steel, and applying a shifting magnetic field in such a manner as to give an accelerating force to the exhaust flow from an immersed nozzle, to control the flow rate (u) of the molten steel to a range of 0.20 to 0.32 m/sec, when the flow rate (u) is less than the critical flow rate for the formation of a skin.
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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 CONTROLLING FLOW OF MOLTEN STEEL IN MOLD, AND METHOD FOR PRODUCING CONTINUOUS CASTINGS
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