MANUFACTURING METHOD FOR VERY HIGH-STRENGTH COLD-ROLLED DUAL-PHASE STEEL SHEETS AND SHEETS SO PRODUCED

The invention relates to a cold-rolled and annealed Dual-Phase steel sheet having a strength between 980 and 1100 MPa, and a breaking elongation greater than 9%, of which the composition comprises, the contents being expressed by weight: 0.055% C 0.095%, 2% Mn 2.6%, 0.005% Si 0.35%, S 0.005%, P 0.05...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SARDOY VERONIQUE, MOULIN ANTOINE, VINCI CATHERINE, GOUNE MOHAMED, WATERSCHOOT TOM, RESTREPO GARCES GLORIA
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The invention relates to a cold-rolled and annealed Dual-Phase steel sheet having a strength between 980 and 1100 MPa, and a breaking elongation greater than 9%, of which the composition comprises, the contents being expressed by weight: 0.055% C 0.095%, 2% Mn 2.6%, 0.005% Si 0.35%, S 0.005%, P 0.050%, 0.1 Al 0.3%, 0.05% Mo 0.25%, 0.2% Cr 0.5%, it being understood that Cr+2Mo 0.6%, Ni 0.1%, 0.010 Nb 0.040%, 0.010 Ti 0.050%, 0.0005 B 0.0025%, and 0.002% N 0.007%, the remainder of the composition consisting of iron and the inevitable impurities resulting from the smelting.