Method for producing a ultra high strength coated or not coated steel sheet and obtained sheet

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United States of America

PATENT NO 12157922
APP PUB NO 20210222267A1
SERIAL NO

17225033

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Abstract

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A method IS for producing a cold rolled steel sheet having a tensile strength ≥1470 MPa and a total elongation TE≥19%. The method includes the steps of annealing at an annealing temperature AT≥Ac3 a non-treated steel sheet whose chemical composition contains in weight %: 0.34%≤C≤0.40%, 1.50%≤Mn≤2.30%, 1.50≤Si≤2.40%, 0%≤Cr≤0.7%, 0%≤Mo≤0.3%, 0.01%≤Al≤0.07%, the remainder being Fe and unavoidable impurities, quenching the annealed steel sheet by cooling it to a quenching temperature QT

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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
Girina, Olga A East Chicago, US 7 9
Panahi, Damon East Chicago, US 12 10

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