Title:
AUSTENITIC STAINLESS STEEL AND MANUFACTURING METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2023/282477
Kind Code:
A1
Abstract:
Disclosed in the specification are ultrafine austenitic stainless steel that simultaneously meets a high strength, a high elongation, and a high yield ratio, and a manufacturing method thereof. The austenitic stainless steel according to an embodiment of the present disclosure comprises, by weight%, 0.005 to 0.03% of carbon (C), 0.1 to 1.0% of silicon (Si), 0.1 to 2.0% of manganese (Mn), 6.0 to 12.0% of nickel (Ni), 16.0 to 20.0% of chromium (Cr), 0.01 to 0.2% of nitrogen (N), 0.25% or less of niobium (Nb), and the balance of iron (Fe) and inevitable impurities and has a mean grain size (d) of 5 ㎛ or less at the thickness center part, with the fraction of a recrystallized area in a band pattern being 10% or less.
Inventors:
PARK MINAM (KR)
KIM SANGSEOK (KR)
KIM SANGSEOK (KR)
Application Number:
PCT/KR2022/008142
Publication Date:
January 12, 2023
Filing Date:
June 09, 2022
Export Citation:
Assignee:
POSCO CO LTD (KR)
International Classes:
C22C38/58; C21D8/02; C22C38/00; C22C38/48
Domestic Patent References:
| WO2016043125A1 | 2016-03-24 |
Foreign References:
| JP5843019B2 | 2016-01-13 | |||
| KR20210052502A | 2021-05-10 | |||
| KR101289518B1 | 2013-07-24 | |||
| JP2015001008A | 2015-01-05 | |||
| CN107075632A | 2017-08-18 | |||
| JP2020050940A | 2020-04-02 |
Attorney, Agent or Firm:
SELIM INTELLECTUAL PROPERTY LAW FIRM (KR)
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