Title:
フェライト系ステンレス鋼
Document Type and Number:
Japanese Patent JP7395737
Kind Code:
B2
Abstract:
A ferritic stainless steel which is characterized by having a chemical composition that contains, in mass%, from 0.001% to 0.02% of C, from 0.02% to 1.5% of Si, 1.5% or less of Mn, 0.040% or less of P, 0.006% or less of S, from 10% to 25% of Cr, from 0.01% to 0.20% of Al, 0.35% or less of Ti, 0.70% or less of Nb, from 0.0005% to 0.010% of O, from 0.005% to 0.025% of N and 0.0030% or less of Ca. This ferritic stainless steel is also characterized in that among the inclusions containing CaO and having a maximum diameter of 2 μm or more, the proportion of the number of inclusions, each of which has one or more M(C, N) sites in the outer peripheral part, while having a total area ratio of the M(C, N) sites of 40% or more, is 70% or more. Meanwhile, M(C, N) represents a carbonitride of element M; and M represents one or more elements that are selected from among Ti, Nb and Cr.
Inventors:
Shigeo Fukumoto
Kei Mihira
Nori Kaneko
Yoshiharu Inoue
Kei Mihira
Nori Kaneko
Yoshiharu Inoue
Application Number:
JP2022528748A
Publication Date:
December 11, 2023
Filing Date:
May 21, 2021
Export Citation:
Assignee:
Nippon Steel Stainless Co., Ltd.
International Classes:
C22C38/00; C22C38/28; C22C38/60
Domestic Patent References:
| JP2015196842A | ||||
| JP2020164924A |
Foreign References:
| WO2016017053A1 | ||||
| WO2019189858A1 |
Attorney, Agent or Firm:
Patent Attorney Corporation Kinoshita Intellectual Property Office