HIGH-STRENGTH COLD ROLLED STEEL SHEET HAVING HIGH FORMABILITY AND A METHOD OF MANUFACTURING THEREOF

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United States of America Patent

APP PUB NO 20190338385A1
SERIAL NO

16470728

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A cold rolled steel sheet, the steel containing, in weight percentage,

    0.19%≤carbon≤0.24%,1.9%≤manganese≤2.2%,1.4%≤silicon≤1.6%,0.01%≤aluminum≤0.06%,0.2%≤chromium≤0.5%,phosphorus≤0.02%,sulfur≤0.003%,the balance including iron and unavoidable impurities, the steel sheet having a microstructure containing 5% to 15% of tempered martensite, 10% to 15% of residual austenite, the balance containing bainite, bainite content being at least 70%, is described. Also described is a manufacturing method and with use of such grade for making vehicle parts.

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Patent Owner(s)

Patent OwnerAddress
ARCELORMITTAL24 - 26 BLVD D'AVRANCHES LUXEMBOURG L-1160

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
PIPARD, Jean-Marc Vaux, FR 11 1
TARGY, Pierre Metz, FR 1 0
THENOT, Marc Olivier Malancourt-la-Montagne, FR 3 0

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