Title:
HOT-ROLLED STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2022/044495
Kind Code:
A1
Abstract:
This hot-rolled steel sheet has a predetermined chemical compositional makeup, and has a metal structure including, in area%, less than 3.0% of retained austenite, not less than 15.0% but less than 60.0% of ferrite, and less than 5.0% of pearlite. The hot-rolled steel sheet has an E value of not less than 10.7, the value indicating periodicity of the metal structure, an I value of less than 1.020, the value indicating uniformity of the metal structure, a standard deviation of Mn concentration of not more than 0.60 mass%, and a tensile strength of not less than 980 MPa.
Inventors:
SHUTO HIROSHI (JP)
TSUTSUI KAZUMASA (JP)
HAYASHI KOUTAROU (JP)
SAKAKIBARA AKIFUMI (JP)
ANDO JUN (JP)
YOSHIDA MITSURU (JP)
TSUTSUI KAZUMASA (JP)
HAYASHI KOUTAROU (JP)
SAKAKIBARA AKIFUMI (JP)
ANDO JUN (JP)
YOSHIDA MITSURU (JP)
Application Number:
PCT/JP2021/022677
Publication Date:
March 03, 2022
Filing Date:
June 15, 2021
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C22C38/00; B21B1/22; C22C38/58; C21D8/02; C21D9/46
Domestic Patent References:
| WO2019009410A1 | 2019-01-10 | |||
| WO2017017933A1 | 2017-02-02 | |||
| WO2021065346A1 | 2021-04-08 |
Foreign References:
| JP2007070661A | 2007-03-22 | |||
| JPS57160509A | 1982-10-02 | |||
| JP2020143743A | 2020-09-10 | |||
| JP2005179703A | 2005-07-07 | |||
| JPH1016A | 1998-01-06 | |||
| JP2005298924A | 2005-10-27 |
Other References:
J. WEBELJ. GOLAD. BRITZF. MUCKLICH, MATERIALS CHARACTERIZATION, vol. 144, 2018, pages 584 - 596
D. L. NAIKH. U. SAJIDR. KIRAN, METALS, vol. 9, 2019, pages 546
K. ZUIDERVELD: "Contrast Limited Adaptive Histogram Equalization", 1994, ACADEMIC PRESS, pages: 474 - 485
See also references of EP 4206344A4
D. L. NAIKH. U. SAJIDR. KIRAN, METALS, vol. 9, 2019, pages 546
K. ZUIDERVELD: "Contrast Limited Adaptive Histogram Equalization", 1994, ACADEMIC PRESS, pages: 474 - 485
See also references of EP 4206344A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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