Method for milling thin and/or thick slabs made of steel...

B - Operations – Transporting – 21 – B

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B21B 1/46 (2006.01) B21B 1/26 (2006.01)

Patent

CA 2515097

Disclosed is a method for milling thin and/or thick slabs (2; 3) made of steel materials into hot-rolled strip (4a). Said slabs are first cast as thin or thick slabs (2; 3) in a continuous casting machine (1), are heated to a milling temperature in a tunnel furnace (5) or walking beam furnace (7), are milled in a mill train (4), and are then chilled and rolled up into coils (18). Said method can be carried out in a largely continuous manner at maximum capacity of the mill train (4) according to the quality standard of the hot- rolled strip (4a) while roller wear is reduced due to the fact that the mill train (4) is formed inline by roughing stands (4c) and finishing stands (4b) into which thin slab sections (2b) or thick slab sections (3b) are introduced at a suitable point of the mill train according to the thickness thereof.

L'invention concerne un procédé pour le laminage en un feuillard à chaud (4a) de brames minces et/ou épaisses (2, 3) en matériaux à base d'acier. Ces brames ont été préalablement coulées en tant que brames minces ou épaisses (2, 3) dans une machine de coulée continue (1), ont été chauffées à la température de laminage dans un four tunnel (5) ou dans un four à longerons mobiles (7) et ont été laminées dans un train de laminoir (4), puis ont été refroidies et enroulées en rouleaux (18). L'invention vise à exécuter ce procédé largement en continu, avec un taux d'utilisation maximal du train de laminoir (4) en fonction de la norme de qualité du feuillard à chaud (4a) et en réduisant l'usure des cylindres. A cet effet, le train de laminoir (4) est formé par des cages dégrossisseuses (4c) et par des cages finisseuses (4b) en ligne, dans lesquelles des segments de brames minces (2b) ou épais (3b) sont introduits à l'emplacement approprié du train de laminoir en fonction de leur épaisseur.

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