Steel sheet and method for producing the same

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United States of America

PATENT NO 12043876
SERIAL NO

17285375

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Abstract

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A steel sheet having a specified chemical composition and a method for producing the steel sheet. The steel sheet has a microstructure comprising ferrite: 5% or less, and at least one of upper bainite, fresh martensite, tempered martensite, lower bainite, and retained γ: 95% to 100%, and retained γ: 5% to 20%. Retained γUB has a specified area percentage SγUB, retained γLB has a specified distribution number NγLB, and at least one of (i) fresh martensite has a specified equivalent circular grain diameter and aspect ratio and (ii) retained γ grains has a specified equivalent circular grain diameter and aspect ratio.

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Patent Owner(s)

Patent OwnerAddress
JFE STEEL CORPORATIONTOKYO 100-0011

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Akimoto, Hiroyuki Tokyo, JP 14 212
Kaneko, Shinjiro Tokyo, JP 88 617
Matsui, Yoichiro Tokyo, JP 10 0
Ono, Yoshihiko Tokyo, JP 72 419
Tobata, Junya Tokyo, JP 14 5

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