HOT-PRESSING STEEL PLATE, PRESS-MOLDED ARTICLE, AND METHOD FOR MANUFACTURING PRESS-MOLDED ARTICLE

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United States of America Patent

APP PUB NO 20160222485A1
SERIAL NO

15021193

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A steel sheet for hot-pressing includes a specific chemical component composition. In the steel sheet, an average equivalent-circle diameter of a Ti-containing precipitate having an equivalent-circle diameter of 30 nm or less among Ti-containing precipitates contained in the steel sheet is 3 nm or more. In the steel, a precipitated Ti amount and a total Ti amount in a steel satisfy the relationship of: Precipitated Ti amount (mass %)−3.4[N]≧0.5×[(total Ti amount (mass %))−3.4[N]] in which [N] indicates the content (mass %) of N in the steel. In the steel sheet, a ferrite fraction in a metal microstructure is 30 area % or more.

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Patent Owner(s)

Patent OwnerAddress
KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL LTD )2-4 WAKINOHAMA-KAIGANDORI 2-CHOME CHUO-KU KOBE-SHI HYOGO 6518585 JAPAN

International Classification(s)

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  • 2013 Application Filing Year
  • C21D Class
  • 530 Applications Filed
  • 450 Patents Issued To-Date
  • 84.91 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances20132014201520162017201820192020202120220255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
IKEDA, Shushi Aichi, JP 44 570
MURAKAMI, Toshio Hyogo, JP 98 1077
NAITOU, Junya Hyogo, JP 36 203
OKITA, Keisuke Hyogo, JP 46 572

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Patent Citation Ranking

  • 16 Citation Count
  • C21D Class
  • 94.58 % this patent is cited more than
  • 9 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges481097201 - 1011 - 2021 - 3005101520253035404550556065707580859095100105110115

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