Steel sheet and method for producing same

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12221666
APP PUB NO 20220177994A1
SERIAL NO

17599443

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

Provided is a steel sheet having a predetermined chemical composition and structure wherein (Fe, Mn)2B precipitates having a circle equivalent diameter of 50 to 300 nm are present in a number density of 1/500 μm2 or more in a surface layer region down to a depth of 100 μm from the surface in the sheet thickness direction. Further, provided is a method for producing a steel sheet comprising continuously casting a molten steel having a predetermined chemical composition to form a steel slab, wherein the continuously casting includes introducing more than 10 ppm and less than 100 ppm of oxygen into the surface layer of the steel slab, hot rolling including finish rolling the steel slab, wherein a completion temperature of the finish rolling is 650 to 950° C., coiling the obtained hot rolled steel sheet at a coiling temperature of 400 to 700° C., and cold rolling the hot rolled steel sheet, then annealing it.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

  • 501 NIPPON STEEL CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Furusako, Seiji Tokyo, JP 24 111
Nakamura, Toyomitsu Tokyo, JP 16 51
Suzuki, Yuya Tokyo, JP 108 258
Takeda, Kengo Tokyo, JP 117 280

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
3.5 Year Payment $1600.00 $800.00 $400.00 Aug 11, 2028
7.5 Year Payment $3600.00 $1800.00 $900.00 Aug 11, 2032
11.5 Year Payment $7400.00 $3700.00 $1850.00 Aug 11, 2036
Fee Large entity fee small entity fee micro entity fee
Surcharge - 3.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00