Title:
HOT-ROLLED STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2021/065346
Kind Code:
A1
Abstract:
This hot-rolled steel sheet has a predetermined chemical composition and is configured such that: with respect to the metal structure of this hot-rolled steel sheet, residual austenite constitutes less than 3.0% by area, ferrite constitutes 15.0% by area or more but less than 60.0% by area, and pearlite constitutes less than 5.0% by area; L60/L7, which is the ratio of the length L60 of the grain boundary at a crystal misorientation of 60° with respect to the <110> direction to the length L7 of the grain boundary at a crystal misorientation of 7° with respect to the <110> direction, is less than 0.60; the standard deviation of the Mn concentration is 0.60% by mass or less; and the tensile strength is 980 MPa or more.
Inventors:
SHUTO HIROSHI (JP)
TSUTSUI KAZUMASA (JP)
HAYASHI KOUTAROU (JP)
SAKAKIBARA AKIFUMI (JP)
ANDO JUN (JP)
ENDO SHOTA (JP)
TSUTSUI KAZUMASA (JP)
HAYASHI KOUTAROU (JP)
SAKAKIBARA AKIFUMI (JP)
ANDO JUN (JP)
ENDO SHOTA (JP)
Application Number:
PCT/JP2020/033593
Publication Date:
April 08, 2021
Filing Date:
September 04, 2020
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C22C38/00; C22C38/58; C21D8/02; C21D9/46
Foreign References:
JP2007070661A | 2007-03-22 | |||
JPS59222528A | 1984-12-14 | |||
JP2019181314A | 2019-10-24 | |||
JPH1161326A | 1999-03-05 | |||
JP2005177903A | 2005-07-07 | |||
JPH10168544A | 1998-06-23 | |||
JP2005298924A | 2005-10-27 |
Other References:
See also references of EP 4039842A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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