Title:
STEEL MATERIAL
Document Type and Number:
WIPO Patent Application WO/2022/145067
Kind Code:
A1
Abstract:
Provided is a steel material with a predetermined chemical composition satisfying 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] represent the content [mass%] of each element), in which the amount of P included in phosphide compounds as measured by an extraction residue method is 0.0003 at% or more with respect to the steel material and the average particle size of phosphides as measured by the TEM replica method is less than 100 nm.
Inventors:
ISHIKAWA KYOHEI (JP)
NAKADA KOHEI (JP)
KIMURA KEN (JP)
UMEHARA MIYURI (JP)
YAMASAKI SHINGO (JP)
NAKADA KOHEI (JP)
KIMURA KEN (JP)
UMEHARA MIYURI (JP)
YAMASAKI SHINGO (JP)
Application Number:
PCT/JP2021/014779
Publication Date:
July 07, 2022
Filing Date:
April 07, 2021
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C21D8/00; C22C19/03; C22C19/05; C22C38/00; C22C38/06; C22C38/60; C22F1/00; C22F1/10
Domestic Patent References:
| WO2019198460A1 | 2019-10-17 | |||
| WO2018151222A1 | 2018-08-23 |
Foreign References:
| JP2019183218A | 2019-10-24 | |||
| JP2018521221A | 2018-08-02 | |||
| JP2014173141A | 2014-09-22 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
Download PDF: