Title:
FERRITIC STAINLESS STEEL WITH IMPROVED GRAIN BOUNDARY EROSION, AND MANUFACTURING METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2022/119134
Kind Code:
A1
Abstract:
Disclosed in the present specification is ferritic stainless steel with improved grain boundary erosion. According to an embodiment of the disclosed ferritic stainless steel with improved grain boundary erosion, the ferritic stainless steel comprises, by weight %, 0.005 to 0.1% of C, 0.01 to 1.0% of Si, 0.01 to 1.5% of Mn, 13 to 18% of Cr, 0.005 to 0.1% of N, 0.005 to 0.2% of Al, 0.005 to 0.1% of Ni, 0.003% or less of Mo, 0.05% or less of P, 0.005% of S and the remainder being Fe and impurities, and Ac1 defined by formula (1) below satisfies 900 to 990. Formula (1): Ac1 = 36Cr+90Si+76Mo+760Al+350-(800C+1300N+150Ni+50Mn) (Here, C, N, Si, Mn, Cr, Ni, Al, Mn and Mo represent the content of respective element (weight %).)
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Inventors:
PARK SOO-HO (KR)
KIM DONG-HOON (KR)
PARK JAE-SEOK (KR)
KIM YOUNGJUN (KR)
KIM DONG-HOON (KR)
PARK JAE-SEOK (KR)
KIM YOUNGJUN (KR)
Application Number:
PCT/KR2021/015393
Publication Date:
June 09, 2022
Filing Date:
October 29, 2021
Export Citation:
Assignee:
POSCO (KR)
International Classes:
C22C38/04; C21D8/02; C22C38/00; C22C38/02; C22C38/06; C22C38/12
Foreign References:
| JP2008214649A | 2008-09-18 | |||
| JPH09111354A | 1997-04-28 | |||
| KR20090067870A | 2009-06-25 | |||
| JP2001288543A | 2001-10-19 | |||
| JP2018154857A | 2018-10-04 | |||
| KR20190072279A | 2019-06-18 |
Attorney, Agent or Firm:
SELIM INTELLECTUAL PROPERTY LAW FIRM (KR)
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