Method for the continuous casting of a thin strip and device...

B - Operations – Transporting – 22 – D

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B22D 11/06 (2006.01)

Patent

CA 2325537

The invention relates to a method for the continuous casting of a thin strip (1) using the two-roll method. According to said method molten metal (7) is cast into a casting slit (3), which is formed by two casting rolls (2) and corresponds to the thickness of the strip (1) to be cast, resulting in the formation of a molten bath (6). The surfaces (11) of the casting rolls (2) located above the molten bath (6) are rinsed with an inert gas or an inert gas mixture in accordance with the state of the surfaces (11) of the casting rolls (2). To avoid local thermal deformations, the surfaces (11) of the casting rolls (2) are observed along their entire length so as to detect local variations in their state. When local variations in state are detected, the gas rinsing of the surfaces (11) of the casting rolls (2) is carried out such that it differs locally in accordance with local variations observed along the entire length of the casting rolls (2).

L'invention concerne un procédé de coulée continue d'une bande mince (1) selon un procédé à deux cylindres. Une masse métallique en fusion (7) est coulée, à l'épaisseur de la bande (1) à couler, dans une fente de coulage (3) formée par deux laminages de coulée continue (2), donnant ainsi un bain en fusion (6). Les surfaces (11) des laminages de coulée continue (2) situées au-dessus du bain de fusion (6) sont rincées avec un gaz inerte ou un mélange de gaz inertes en fonction de leur état. Pour éviter des déformations thermiques locales, les surfaces (11) des laminages de coulée continue (2) sont observées sur toute leur longueur pour déceler les différents états locaux. En cas d'apparition de différents états locaux, le rinçage au gaz des surfaces (11) des laminages de coulée continue (2) est effectué de façon localement différenciée en fonction des différents états locaux sur la longueur des laminages de coulée continue (2).

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