Method and device for annealing and descaling strips of...

B - Operations – Transporting – 21 – B

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B21B 45/06 (2006.01) C21D 1/26 (2006.01)

Patent

CA 2749962

The invention is directed to a method for annealing and descaling hot-rolled austenitic stainless steel strip. According to the invention, the steel strip is descaled in a connected plasma descaling installation after annealing and subsequent cooling. The plasma descaling is carried out under vacuum in a plurality of stages, and the steel strip is subjected to a controlled cooling between these stages and after the final stage by means of cooling rolls so that the steel strip has a temperature below 100 °C when exiting the plasma descaling installation.

La présente invention concerne un procédé pour recuire et décalaminer une bande d'acier inoxydable austénitique laminée à chaud. Selon l'invention, la bande d'acier, après avoir été recuite puis refroidie, est décalaminée dans une installation de décalaminage au plasma couplée, le décalaminage au plasma s'effectuant sous dépression en plusieurs étapes et la bande d'acier subissant, entre ces étapes et après la dernière étape un refroidissement régulé au moyen de cylindres de refroidissement de sorte que la bande d'acier se trouve à une température inférieure à 100 °C à sa sortie de l'installation de décalaminage au plasma.

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