Manufacturing method for very high-strength, cold-rolled, dual-phase steel sheets

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United States of America Patent

PATENT NO 10190187
APP PUB NO 20160222486A1
SERIAL NO

15097039

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Abstract

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The present invention provides a cold-rolled and annealed Dual-Phase steel sheet having strength from 980 to 1100 MPa and a breaking elongation greater than 9%. The composition includes 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%, 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 includes iron and inevitable impurities resulting from the smelting. A manufacturing method is also provided.

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Patent Owner(s)

Patent OwnerAddress
ARCELORMITTAL1160 LUXEMBOURG

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Goune, Mohamed Pont A Mousson, FR 3 29
Moulin, Antoine Woippy, FR 40 536
Restrepo, Gacess Gloria Salon de Provence, FR 2 7
Sardoy, Veronique Saint Julien Metz, FR 5 35
Vinci, Catherine Jury, FR 6 48
Watershoot, Tom Lokeren, BE 3 7

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