Title:
HOT ROLLED STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2022/091489
Kind Code:
A1
Abstract:
A hot rolled steel sheet according to the present invention has a prescribed chemical composition (containing, by mass%, 0.025-0.055% of C, 1.00-2.00% of Mn, 0.200% or more but less than 0.500% of sol. Al, 0.030-0.200% of Ti, and 0.100 or less of Si), wherein: metallographic structures include, by area%, 2.0% or more but less than 10.0% of polygonal ferrite, and over 90.0% but less than 98% of remaining structures; the correlation value obtained by analyzing the remaining structures in SEM images of the metallographic structures is 0.82-0.95; and the maximum probability value is 0.0040-0.0200.
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Inventors:
YABU SHOHEI (JP)
TSUTSUI KAZUMASA (JP)
KUWAYAMA TAKUYA (JP)
TSUTSUI KAZUMASA (JP)
KUWAYAMA TAKUYA (JP)
Application Number:
PCT/JP2021/025901
Publication Date:
May 05, 2022
Filing Date:
July 09, 2021
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C22C38/00; C21D9/46; C22C38/58
Domestic Patent References:
| WO2021090642A1 | 2021-05-14 | |||
| WO2018033990A1 | 2018-02-22 | |||
| WO2014051005A1 | 2014-04-03 | |||
| WO2012128228A1 | 2012-09-27 |
Foreign References:
| JP2017179539A | 2017-10-05 | |||
| JP2017145466A | 2017-08-24 | |||
| JP2013133534A | 2013-07-08 | |||
| JP2011122188A | 2011-06-23 | |||
| JP2020180729A | 2020-11-05 |
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
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
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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