C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
C21D 8/02 (2006.01) C21D 8/04 (2006.01) C22C 38/00 (2006.01) C22C 38/04 (2006.01) C22C 38/06 (2006.01) C21D 6/00 (2006.01)
Patent
CA 2687327
The invention relates to a hot-rolled ferritic sheet made of steel having the following composition in weight: 0.001< C <=0.15%, Mn <= 1 %, Si < 1.5%, 6% <=AI < 10%, 0.020% < Ti < 0.5%, S < 0.050%, P < 0.1 %, and optionally one or more elements selected from: Cr < 1 %, Mo < 1 %, Ni < 1%, Nb < 0.1 %, V <= 0.2%,, B <= 0.010%, the balance of the composition consisting of Fe and unavoidable impurities resulting from the manufacture, the average grain size of ferrite dIV as measured on a surface perpendicular to the transverse relative to the rolling being lower than 100 micrometers.
L'invention concerne une tôle ferritique laminée à chaud en acier dont la composition comprend, les teneurs étant exprimées en poids : 0,001< C <=0,15%, Mn <= 1 %, Si < 1,5%, 6% <=AI < 10%, 0,020% < Ti < 0,5%, S < 0,050%, P < 0, 1 %, et, à titre optionnel, un ou plusieurs éléments choisis parmi : Cr < 1 %, Mo < 1 %, Ni < 1%, Nb < 0,1 %, V <= 0,2%,, B <= 0,010%, le reste de la composition étant constitué de fer et d'impuretés inévitables résultant de l'élaboration, la taille moyenne de grain de ferrite dIVmesurée sur une surface perpendiculaire à la direction transverse par rapport au laminage étant inférieure à 100 micromètres
Bouaziz Olivier
Drillet Josee
Garat Xavier
Perlade Astrid
Uriarte Jean-Louis
Arcelormittal France
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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