Improved contact mould for the continuous casting of steel...

B - Operations – Transporting – 22 – D

Patent

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B22D 11/04 (2006.01)

Patent

CA 2296845

An improved mould for the continuous casting of steel slabs having thickness in the range from 50 to 120 mm, particularly suitable to be rolled to thin strips, presents two large faces (F), each one having in horizontal cross section a concave or rectilinear central zone symmetrical with respect to each other, connected at both sides to the narrow faces (f) through concave-convex wide bends with respect to the internal part of the mould, without other lengths being parallel to opposite portions of the other face (F), besides to a possible central rectilinear length. The radiuses of the concave portion (r1) and of the convex portion (r2) are in a mutual ratio of a range from 0.6 to 1.4, these portions being preferably the same at each horizontal cross section of the mould and increasing downwards, while the depth (a) of the concavity decreases downwards, being possibly constant from a height (ybc) to the outlet section, but being preferably continuously decreasing along the whole length of the mould, with a residual depth <=5 mm at the outlet zone.

Cette invention se rapporte à un moule amélioré pour le moulage en continu de brames d'acier ayant une épaisseur comprise entre 50 et 120 mm destinées en particulier à être laminées pour former de minces feuillards, ce moule comportant deux faces larges (F), ayant chacune en coupe horizontale une zone centrale concave ou rectiligne symétrique par rapport à l'autre, reliée des deux côtés aux faces étroites (f) par d'épais coudes concaves-convexes par rapport à la partie intérieure du moule, sans autres segments parallèles aux parties opposées de l'autre face (F), à l'exception d'un segment rectiligne central éventuel. Les rayons de la partie concave (r1) et de la partie convexe (r2) présentent un rapport réciproque compris entre 0,6 et 1,4, ces parties étant identiques à chaque coupe horizontale du moule et décroissant progressivement vers le bas, tandis que la profondeur (a) de la concavité diminue progressivement vers le bas, tout en restant éventuellement constante à partir d'une hauteur (ybc) jusqu'à la section de sortie, mais étant de préférence décroissante en continu sur toute la longueur du moule, avec une profondeur résiduelle inférieure ou égale à 5 mm au niveau de la zone de sortie.

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