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Title:
HOT-STAMP-MOLDED OBJECT
Document Type and Number:
WIPO Patent Application WO/2023/074189
Kind Code:
A1
Abstract:
This hot-stamp-molded object has a predetermined chemical composition and has a metal structure including, in area percentage, 90-100% of martensite and 0-10% of remaining structures. Of all martensites, the proportion of martensites, having a GAIQ value of 40000 or less, is less than 5.0%. The average particle size of prior austenite grains is 6.0 μm or less. The standard deviation of the particle sizes of the prior austenite grains is 2.6 μm or less.

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Inventors:
FUJINAKA SHINGO (JP)
NISHIBATA HITOMI (JP)
Application Number:
PCT/JP2022/034883
Publication Date:
May 04, 2023
Filing Date:
September 20, 2022
Export Citation:
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Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C22C38/00; C21D1/18; C21D9/00; C22C38/60
Domestic Patent References:
WO2020189761A12020-09-24
WO2019003540A12019-01-03
WO2020189767A12020-09-24
WO2020241764A12020-12-03
WO2021145445A12021-07-22
WO2020079925A12020-04-23
WO2018134874A12018-07-26
WO2020189767A12020-09-24
Foreign References:
JP7028378B12022-03-02
JP2021175240A2021-11-01
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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