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Title:
HOT-ROLLED STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2023/149374
Kind Code:
A1
Abstract:
This hot-rolled steel sheet has a desired chemical composition and a metal structure, wherein: the average spherical equivalent radius of alloy carbide in ferrite is 0.5-5.0 nm (exclusive of 5.0); the average number density is at least 3.5 × 1016 /cm3; the E value indicating the periodicity of the metal structure is at least 10.7; the I value indicating the uniformity of the metal structure is at least 1.020; the standard deviation of the Mn concentration is at most 0.60 mass%; and the tensile strength is at least 980 MPa.

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Inventors:
HIROSHIMA HIDETO (JP)
SHUTO HIROSHI (JP)
TSUTSUI KAZUMASA (JP)
KOBAYASHI YUKIKO (JP)
Application Number:
PCT/JP2023/002651
Publication Date:
August 10, 2023
Filing Date:
January 27, 2023
Export Citation:
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Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C21D8/02; C21D9/46; C22C38/00; C22C38/58
Domestic Patent References:
WO2022044495A12022-03-03
WO2022210396A12022-10-06
Foreign References:
US20190055633A12019-02-21
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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