Hot-rolled steel sheet

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United States of America Patent

PATENT NO 10913988
APP PUB NO 20180044749A1
SERIAL NO

15551171

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A hot-rolled steel sheet includes a predetermined chemical composition, and a structure which include, by area ratio, ferrite and bainite in a range of 80% to 98% in total, and martensite in a range of 2% to 10%, in which in the structure, in a case where a boundary having an orientation difference of equal to or greater than 15° is defined as a grain boundary, and an area which is surrounded by the grain boundary, and has an equivalent circle diameter of equal to or greater than 0.3 μm is defined as a grain, the ratio of the grains having an intragranular orientation difference in a range of 5° to 14° is, by area ratio, in a range of 10% to 60%.

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Patent Owner(s)

  • 501 NIPPON STEEL CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Shuto, Hiroshi Oita, JP 45 191
Sugiura, Natsuko Kimitsu, JP 35 357
Wakita, Masayuki Osaka, JP 18 290
Yokoi, Tatsuo Oita, JP 51 346
Yoshida, Mitsuru Himeji, JP 57 382

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