Method and device for the continuous casting and direct...

B - Operations – Transporting – 22 – D

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B22D 11/12 (2006.01) B22D 11/124 (2006.01) B22D 11/128 (2006.01) B22D 11/20 (2006.01) B22D 11/22 (2006.01)

Patent

CA 2470961

The invention relates to a method and a continuous casting device for the direct shaping of a metal strand, in particular a steel cast strand (1) of any format (1d). According to said method, the cast strand (1) is only cooled by a liquid coolant (4) in longitudinal sections (6), where the interior of the cast strand (1) remains liquefied and the temperature of the cast strand (1) in a transition zone (7) upstream of, in and/or downstream of a bending and straightening unit (8) is evened out by an insulation of the exterior surface (1 b), essentially without the use of a liquid coolant (4), and by progressive thermal radiation. The cast strand (1) is shaped in a dynamically variable reduction section (9) as a result of the compressive strength that is measured on individual shaping rolls (10) or roll segments (11), depending on the compressive force that can be locally applied.

La présente invention concerne un procédé et un dispositif de coulée continue conçus pour façonner un métal, notamment une barre de coulée (1) en matériaux à base d'acier de n'importe quel format (1d). Selon ce procédé, la barre de coulée (1) n'est refroidie par des agents de refroidissement liquides (1d) que dans des sections longitudinales (6) où l'intérieur de la barre de coulée (1) est liquide, puis la température de la barre de coulée (1) est homogénéisée dans une zone de transition (7) en amont, dans et/ou en aval d'une unité de pliage-dressage (8), au moyen d'une isolation de la surface extérieure (1b), sensiblement sans l'aide d'agent de refroidissement liquide (4), et par rayonnement thermique progressif. La barre de coulée (1) est ensuite façonnée sur une section de réduction à variation dynamique (9) en fonction de la pression applicable localement, vu la résistance à la pression mesurée sur des rouleaux de façonnage individuels (10) ou sur des segments de rouleau (11).

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