IMMERSION NOZZLE

The present invention provides a flat immersion nozzle, wherein the immersion nozzle stabilizes molten steel discharge flow and stabilizes the melt surface inside a mold, i.e., reduces fluctuation thereof. In the present invention, the immersion nozzle has a flat shape in which the width Wn of the i...

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Main Authors MIZOBE, ARITO, FURUKAWA, HIROKI, FUKUNAGA, SHINICHI, OKI, KENICHI
Format Patent
LanguageEnglish
French
Published 21.01.2020
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Abstract The present invention provides a flat immersion nozzle, wherein the immersion nozzle stabilizes molten steel discharge flow and stabilizes the melt surface inside a mold, i.e., reduces fluctuation thereof. In the present invention, the immersion nozzle has a flat shape in which the width Wn of the inner hole is greater than the thickness Tn of the inner hole, wherein center protrusion sections (1) are provided in the center section of the wall surface of the flat portion in the width direction. Wp/Wn, which is the ratio of the length Wp of the center protrusion sections (1) in the width direction in relation to the width Wn, is 0.2-0.7. The center protrusion sections (1) are disposed symmetrically in a pair, and the total length Tp of the pair of center protrusion sections in the thickness direction is 0.15-0.75 of Tn. La présente invention concerne une buse immergée plate, qui stabilise l'écoulement de décharge de l'acier fondu et stabilise la surface fondue dans un moule, et notamment atténue sa fluctuation. Dans la présente invention, la buse immergée présente une forme plate dans laquelle la largeur Wn de l'orifice interne est supérieure à l'épaisseur Tn de l'orifice interne, des sections de saillie centrale (1) étant ménagées dans la section centrale de la surface de paroi de la partie plate dans le sens de la largeur. Wp/Wn, qui est le rapport entre la longueur Wp des sections de saillie centrale (1) dans le sens de la largeur et la largeur Wn, est de 0,2 à 0,7. Les sections de saillie centrale (1) sont disposées symétriquement en paire, et la longueur totale Tp de la paire de sections de saillie centrale dans le sens de l'épaisseur est de 0,15 à 0,75 Tn.
AbstractList The present invention provides a flat immersion nozzle, wherein the immersion nozzle stabilizes molten steel discharge flow and stabilizes the melt surface inside a mold, i.e., reduces fluctuation thereof. In the present invention, the immersion nozzle has a flat shape in which the width Wn of the inner hole is greater than the thickness Tn of the inner hole, wherein center protrusion sections (1) are provided in the center section of the wall surface of the flat portion in the width direction. Wp/Wn, which is the ratio of the length Wp of the center protrusion sections (1) in the width direction in relation to the width Wn, is 0.2-0.7. The center protrusion sections (1) are disposed symmetrically in a pair, and the total length Tp of the pair of center protrusion sections in the thickness direction is 0.15-0.75 of Tn. La présente invention concerne une buse immergée plate, qui stabilise l'écoulement de décharge de l'acier fondu et stabilise la surface fondue dans un moule, et notamment atténue sa fluctuation. Dans la présente invention, la buse immergée présente une forme plate dans laquelle la largeur Wn de l'orifice interne est supérieure à l'épaisseur Tn de l'orifice interne, des sections de saillie centrale (1) étant ménagées dans la section centrale de la surface de paroi de la partie plate dans le sens de la largeur. Wp/Wn, qui est le rapport entre la longueur Wp des sections de saillie centrale (1) dans le sens de la largeur et la largeur Wn, est de 0,2 à 0,7. Les sections de saillie centrale (1) sont disposées symétriquement en paire, et la longueur totale Tp de la paire de sections de saillie centrale dans le sens de l'épaisseur est de 0,15 à 0,75 Tn.
Author FUKUNAGA, SHINICHI
MIZOBE, ARITO
OKI, KENICHI
FURUKAWA, HIROKI
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Snippet The present invention provides a flat immersion nozzle, wherein the immersion nozzle stabilizes molten steel discharge flow and stabilizes the melt surface...
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SubjectTerms CASTING
CASTING OF METALS
CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
PERFORMING OPERATIONS
POWDER METALLURGY
TRANSPORTING
Title IMMERSION NOZZLE
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