Title:
STEEL MATERIAL
Document Type and Number:
WIPO Patent Application WO/2022/145070
Kind Code:
A1
Abstract:
Provided is a steel material that has a specific chemical composition satisfying 0.40 [La] + 0.40 [Ce] + 0.39 [Nd] + 0.63 [Y] − 2.33 [O] − 1.74 [S] − 1.80 [P] ≥ 0.0003 (where [La], [Ce], [Nd], [Y], [O], [S], and [P] are the contents [mass%] of the respective elements), and that contains a grain boundary having a crystal orientation difference of 23° to 45° and a total segregated amount of La, Ce, Nd, and Y of 0.2 atoms/nm2 or greater.
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Inventors:
TERAZAWA DAIKI (JP)
TOYODA TAKESHI (JP)
KIMURA KEN (JP)
UMEHARA MIYURI (JP)
YAMASAKI SHINGO (JP)
TAKAHASHI JUN (JP)
ISHIKAWA KYOHEI (JP)
TOYODA TAKESHI (JP)
KIMURA KEN (JP)
UMEHARA MIYURI (JP)
YAMASAKI SHINGO (JP)
TAKAHASHI JUN (JP)
ISHIKAWA KYOHEI (JP)
Application Number:
PCT/JP2021/014786
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
Foreign References:
| JP2014173160A | 2014-09-22 | |||
| JPH08193240A | 1996-07-30 | |||
| JPS6431952A | 1989-02-02 | |||
| US20170037592A1 | 2017-02-09 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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