FERRITIC STAINLESS STEEL AND METHOD FOR PRODUCING SAME

Title:

FERRITIC STAINLESS STEEL AND METHOD FOR PRODUCING SAME

Document Type and Number:

WIPO Patent Application WO/2023/027129

Kind Code:

A1

Abstract:

The present invention addresses the problem of providing: a ferritic stainless steel which has a wide adequate quenching temperature range, while having high hardness and excellent corrosion resistance after quenching, and which serves as a material for beautiful martensitic stainless steel products; and an industrially stable production method therefor. A ferritic stainless steel according to the present invention is characterized by having a steel composition that contains, in mass%, 0.45% to 0.55% of C, 0.10% to 1.00% of Si, 0.1% to 1.0% of Mn, 12.0% to 15.0% of Cr, 0% to 1.0% of Ni, 0.50% to 0.80% of Mo, 0.10% to 0.20% of V, 0.015% to 0.100% of N, 0% to 0.040% of P and 0% to 0.030% of S, with the balance being made up of Fe and impurities. This ferritic stainless steel is also characterized in that: the ferrite phase has an average crystal grain size of 10 µm or less; and carbides having a diameter of 1.5 µm or less are present at a density of 0.8 per µm2 or more.

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Inventors:

TSUBOI KOHICHI (JP)
IMAKAWA KAZUNARI (JP)
TERAOKA SHINICHI (JP)

Application Number:

PCT/JP2022/031950

Publication Date:

March 02, 2023

Filing Date:

August 24, 2022

Export Citation:

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Assignee:

NIPPON STEEL STAINLESS STEEL CORP (JP)

International Classes:

C21D8/02; C21D9/46; C22C38/00; C22C38/46; C22C38/60

Foreign References:

JP2005082838A	2005-03-31
KR20140080916A	2014-07-01
KR20130000841A	2013-01-03
JP2021050386A	2021-04-01
JP2002212679A	2002-07-31
JP2007224405A	2007-09-06

Attorney, Agent or Firm:

AOKI, Atsushi et al. (JP)

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