Metal coated steel sheet, manufacturing method of hot-dip galvanized steel sheet, and manufacturing method of alloyed galvannealed steel sheet

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United States of America Patent

PATENT NO 11732341
APP PUB NO 20190218652A1
SERIAL NO

16332329

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Abstract

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In a metal coated steel sheet, a chemical composition contains, in mass %, at least C: 0.03% to 0.70%, Si: 0.25% to 2.50%, Mn: 1.00% to 5.00%, P: 0.100% or less, S: 0.010% or less, sol. Al: 0.001% to 2.500, N: 0.020% or less, and a balance composed of iron and impurities, a metal structure contains greater than 5.0 vol % of retained austenite and greater than 5.0 vol % of tempered martensite, and satisfies a C content in the retained austenite being 0.85 mass % or more.

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Patent Owner(s)

Patent OwnerAddress
NIPPON STEEL CORPORATIONCHIYODA-KU TOKYO 100-8071

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Haga, Jun Tokyo, JP 21 81
Hayashi, Koutarou Tokyo, JP 46 80
Hayashi, Kunio Tokyo, JP 72 521
Kameda, Masaharu Tokyo, JP 6 26
Kawata, Hiroyuki Tokyo, JP 104 1026
Sano, Kohichi Tokyo, JP 37 358
Uenishi, Akihiro Tokyo, JP 60 311

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