Method and device for thermal treatment of steel wire

C - Chemistry – Metallurgy – 21 – D

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C21D 9/567 (2006.01) C21D 1/53 (2006.01) C21D 9/64 (2006.01)

Patent

CA 2404500

The invention concerns a method for thermal treatment of steel wire, which consists in raising the temperature of at least one steel wire to be treated up to a temperature for austenitizing the steel, and maintaining the wire at said temperature for a temperature equalizing period within the metal mass of said at least one wire. The invention is characterised in that it comprises forming a fluidised bed, heating the fluidised bed, and moving through said heated fluidised bed at least one metal wire to be treated so as to ensure at least said temperature rise, said heating being at least partly obtained by at least heating the fluidised bed which is produced substantially tangential to an upper average area thereof.

Procédé de traitement thermique de fil d'acier, comprenant une montée en température d'au moins un fil à traiter jusqu'à une température d'austénitisation de l'acier, et un maintien du fil à cette température pendant une période d'égalisation de température au sein de la masse métallique dudit au moins un fil, caractérisé en ce qu'il comprend une formation d'un lit fluidisé, un chauffage du lit fluidisé, et un défilement à travers le lit fluidisé chauffé dudit au moins un fil métallique à traiter de manière à assurer au moins ladite montée en température, ledit chauffage étant au moins partiellement obtenu par au moins un chauffage du lit fluidisé qui est produit sensiblement tangentiellement à une surface supérieure moyenne de celui-ci.

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