Title:
HOT ROLLED STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2024/095532
Kind Code:
A1
Abstract:
Provided is a hot rolled steel sheet that has a prescribed chemical composition and contains 80 to 98% of at least one of a ferrite and a bainite in total and 2 to10% of a martensite in terms of areal percentage and that has a metallic structure, wherein: given that a boundary having an orientation difference of 15º or more is defined as a grain boundary and a region that is surrounded by the grain boundary and has a circle-equivalent diameter of 0. 3μm or more is defined as a crystal grain, the proportion of crystal grains having an in-grain orientation difference of 5-14º is 10 to 60% in terms of areal percentage; the average pole density in the {110}<111> and {112}<111> orientations in a region from the surface to the 1/6-sheet thickness position is 2.50 or more; and the average pole density in the {100}<011>, {211}<011> , and {332}<113> orientations in a region from the 2/5-sheet thickness position to the 3/5-sheet thickness position is 7.00 or less.
Inventors:
YOSHITAKE MUTSUMI (JP)
SHUTO HIROSHI (JP)
ITO DAISUKE (JP)
ANDO JUN (JP)
NAGAI KENSUKE (JP)
SHUTO HIROSHI (JP)
ITO DAISUKE (JP)
ANDO JUN (JP)
NAGAI KENSUKE (JP)
Application Number:
PCT/JP2023/024341
Publication Date:
May 10, 2024
Filing Date:
June 30, 2023
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C22C38/00; C21D8/02; C21D9/46; C22C38/60
Domestic Patent References:
| WO2016133222A1 | 2016-08-25 | |||
| WO2020195605A1 | 2020-10-01 |
Foreign References:
| JP2009132988A | 2009-06-18 | |||
| JP2005298956A | 2005-10-27 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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