Method and installation for producing dual-phase steel

Details Method and installation for producing dual-phase steel Method and installation for producing dual-phase steel

C - Chemistry, Metallurgy

21

D

C21D 8/02 (2006.01) C21D 1/02 (2006.01)

Patent

CA 2338743

The invention relates to the production of dual-phase steel (2) which is obtained by targeted cooling after the final deformation step in a rolling stand (1), whereby a dual-phase structure of between 70 and 90 % ferrite and between 30 and 10 % martensite is adjusted. So as to be independent of steel geometry and strip speed the invention provides for cooling to take the form of fluidized-bed cooling carried out in a cooling line (6) comprising water-cooling stages (7) arranged one behind the other.

L'invention concerne la production d'aciers à deux phases (2) obtenus par refroidissement ciblé après la dernière étape de déformation dans une cage de laminoir (1). Selon ce procédé, on ajuste une structure à deux phases composée de 70 à 90 % de ferrite et de 30 à 10 % de martensite. Afin de ne pas dépendre de la géométrie de l'acier et de la vitesse du feuillard, il est prévu selon l'invention d'effectuer le refroidissement sous forme de refroidissement par dispersion, dans une section de refroidissement (6) avec des étages d'eau de refroidissement (7) placés les uns à la suite des autres.

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