Title:
STEEL SHEET FOR HOT STAMPING AND HOT STAMPED MOLDED BODY
Document Type and Number:
WIPO Patent Application WO/2022/239758
Kind Code:
A1
Abstract:
This hot stamped molded body has a metallographic structure having a prescribed chemical composition, the average grain size of old austenite grains being 5-25 μm, and the standard deviation of the grain size of the old austenite grains being 0.1-2.0 μm. Additionally, this steel sheet for hot stamping has a metallographic structure having a prescribed chemical composition, the average pole density of an orientation group composed of ferrite /{100/}<011>-/{223/}<110> being 10.0 or less, the numeric ratio of ferrites that include carbides having an equivalent circle diameter of 0.2 μm or greater in crystal grains among all ferrites being 20% or greater, and perlite and ferrite constituting 10-90% and 10-90% by area ratio, respectively.
Inventors:
TODA YURI (JP)
MAEDA DAISUKE (JP)
SUZUKI TAMAKI (JP)
SATAKE KO (JP)
ASADA YUMA (JP)
MAEDA DAISUKE (JP)
SUZUKI TAMAKI (JP)
SATAKE KO (JP)
ASADA YUMA (JP)
Application Number:
PCT/JP2022/019758
Publication Date:
November 17, 2022
Filing Date:
May 10, 2022
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C21D9/00; C21D1/18; C21D9/46; C22C38/00; C22C38/60
Domestic Patent References:
| WO2012133540A1 | 2012-10-04 | |||
| WO2018151273A1 | 2018-08-23 | |||
| WO2007111080A1 | 2007-10-04 | |||
| WO2016190396A1 | 2016-12-01 |
Foreign References:
| JP2009068081A | 2009-04-02 | |||
| JP2021081621A | 2021-05-27 |
Other References:
ACTA MATERIALIA, vol. 58, 2010, pages 6393 - 6403
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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