Hot rolled steel sheet having excellent crashworthiness and method for manufacturing same

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12180556
APP PUB NO 20230366053A1
SERIAL NO

18025836

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Abstract

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Provided are a hot rolled steel sheet having excellent crashworthiness and a method for manufacturing same. The hot rolled steel sheet of the present invention contains, in weight %, 0.05-0.13% of carbon (C), 0.2-2.0% of silicon (Si), 1.3-3.0% of manganese (Mn), 0.01-0.1% of aluminum (Al), 0.001-0.05% of phosphor (P), 0.001-0.05% of sulfur (S), 0.001-0.02% of nitrogen (N), and the balance being Fe and other inevitable impurities, and has a steel microstructure comprising, in area %, 55% or more of bainitic ferrite, 10% or more of a martensite/austenite composite phase (MA), the sum of the bainitic ferrite and the martensite/austenite composite phase (MA) being 95% or more, and the remaining total being less than 5% of granular ferrite, retained austenite, and carbides.

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Patent Owner(s)

Patent OwnerAddress
POSCO CO LTD6261 DONGHAEAN-RO NAM-GU GYEONGSANGBUK-DO POHANG-SI 37859

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Choi, Chang-Sik Gwangyang-si, KR 78 180
Kim, Sung-Il Gwangyang-si, KR 71 314
Song, Tae-Jin Gwangyang-si, KR 13 17

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