Cold-rolled steel sheet, galvanized cold-rolled steel sheet and method of manufacturing the same

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United States of America Patent

PATENT NO 9970074
SERIAL NO

14891889

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Abstract

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A cold-rolled steel sheet includes a predetermined chemical composition, and includes a structure expressed by: an area fraction of ferrite: 95% or more; an area fraction of retained austenite and an area fraction of martensite: 1% to 3% in total; a product of the area fraction of retained austenite and a carbon concentration in retained austenite: 1 or more; a value of I(111)/{I(100)+I(110)} at a region where a depth from a surface is ¼ of a thickness of the cold-rolled steel sheet when intensity of a (hkl) plane is expressed by I(hkl): 2 or less.

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Patent Owner(s)

Patent OwnerAddress
NIPPON STEEL CORPORATION6-1 MARUNOUCHI 2-CHOME CHIYODA-KU TOKYO 100-8071

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kameda, Masaharu Tokyo, JP 6 26
Kawasaki, Kaoru Tokyo, JP 42 594
Okamoto, Riki Tokyo, JP 59 364
Sano, Kohichi Tokyo, JP 37 358

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