Title:
HOT-ROLLED STEEL PLATE
Document Type and Number:
WIPO Patent Application WO/2023/063010
Kind Code:
A1
Abstract:
This hot-rolled steel plate: has a prescribed chemical composition; has a metal structure having, in area%, retained austenite at less than 3.0%, ferrite at at least 15.0% to less than 60.0%, and pearlite at less than 5.0%; has, according to a gray level co-occurrence matrix method, an entropy value obtained by analyzing a SEM image of the metal structure, of 10.7% or more; an inverse differenced normalized value of at least 1.020; a cluster shade value of -8.0 × 105 - 8.0 × 105; an Mn concentration standard deviation of no more than 0.60 mass%; and a tensile strength of 980 MPa or more.
More Like This:
Inventors:
SHUTO HIROSHI (JP)
TSUTSUI KAZUMASA (JP)
KOBAYASHI SHUNSUKE (JP)
SAKAKIBARA AKIFUMI (JP)
ANDO JUN (JP)
SUGIYAMA TOSHIKI (JP)
TSUTSUI KAZUMASA (JP)
KOBAYASHI SHUNSUKE (JP)
SAKAKIBARA AKIFUMI (JP)
ANDO JUN (JP)
SUGIYAMA TOSHIKI (JP)
Application Number:
PCT/JP2022/034395
Publication Date:
April 20, 2023
Filing Date:
September 14, 2022
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C21D8/02; C21D9/46; C22C38/00; C22C38/58
Domestic Patent References:
| WO2020184372A1 | 2020-09-17 | |||
| WO2014166323A1 | 2014-10-16 | |||
| WO2020044445A1 | 2020-03-05 |
Foreign References:
| JP2015214718A | 2015-12-03 | |||
| JP2015098629A | 2015-05-28 | |||
| JP2021166958A | 2021-10-21 |
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", vol. 5, 1994, ACADEMIC PRESS, article "Graphics Gems IV", pages: 474 - 485
D. L. NAIKH. U. SAJIDR. KIRAN, METALS, vol. 9, 2019, pages 546
K. ZUIDERVELD: "Contrast Limited Adaptive Histogram Equalization", vol. 5, 1994, ACADEMIC PRESS, article "Graphics Gems IV", pages: 474 - 485
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
Download PDF: