Hot-dip galvanized steel sheet

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United States of America Patent

PATENT NO 10718044
APP PUB NO 20190169729A1
SERIAL NO

16092947

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Abstract

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A hot-dip galvanized steel sheet includes: a predetermined chemical composition; and a steel structure represented by: in terms of area ratio, polygonal ferrite: 10% or less; upper bainite: 20% or less; retained austenite: 5% or less; and martensite: 70% or more, in which: martensite having Fe carbides at a number density of 1×106/mm2 or more is contained by 50% or more, in terms of area ratio, with respect to the entire amount of martensite; and the steel structure has an average effective crystal grain diameter of 5.0 μm 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
Abukawa, Genki Tokyo, JP 27 39
Azuma, Masafumi Tokyo, JP 63 464
Hayashi, Kunio Tokyo, JP 72 521
Kawata, Hiroyuki Tokyo, JP 104 1026
Sakurada, Eisaku Tokyo, JP 37 64
Yokoyama, Takafumi Tokyo, JP 30 93

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