Title:
STEEL MATERIAL
Document Type and Number:
WIPO Patent Application WO/2022/145062
Kind Code:
A1
Abstract:
Provided is a steel material having a prescribed chemical composition that satisfies 0.40[Pr]+0.37[Sm]+0.37[Eu]+0.36[Gd]+0.35[Tb]+0.34[Dy]+0.34[Ho]+0.33[Er]+0.33[Tm]+0.32[Yb]+0.32[Lu]+1.24[Sc]-2.33[O]-3.99[N]-1.74[S]≧0.0003 (in the formula, [Pr], [Sm], [Eu], [Gd], [Tb], [Dy], [Ho], [Er], [Tm], [Yb], [Lu], [Sc], [O], [N], and [S] are the contents [mass%] of the respective elements), and comprising a grain boundary with a crystal misorientation of 23-45° wherein the total of segregation amounts of Pr, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and Sc is at least 0.2 atoms/nm2.
Inventors:
ISHIKAWA KYOHEI (JP)
KIMURA KEN (JP)
TAKAHASHI JUN (JP)
YAMASAKI SHINGO (JP)
UMEHARA MIYURI (JP)
NAKADA KOHEI (JP)
KIMURA KEN (JP)
TAKAHASHI JUN (JP)
YAMASAKI SHINGO (JP)
UMEHARA MIYURI (JP)
NAKADA KOHEI (JP)
Application Number:
PCT/JP2021/014741
Publication Date:
July 07, 2022
Filing Date:
April 07, 2021
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C22C19/03; C22C19/05; C22C38/00; C22C38/60; C21D8/00; C22F1/00; C22F1/10
Domestic Patent References:
| WO2006112428A1 | 2006-10-26 | |||
| WO2016092756A1 | 2016-06-16 |
Foreign References:
| JPH08193240A | 1996-07-30 | |||
| JPS62250154A | 1987-10-31 | |||
| US20170037592A1 | 2017-02-09 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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