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1. WO2020111546 - FERRITIC STAINLESS STEEL HAVING IMPROVED CORROSION RESISTANCE, AND MANUFACTURING METHOD THEREFOR

Publication Number WO/2020/111546
Publication Date 04.06.2020
International Application No. PCT/KR2019/014743
International Filing Date 01.11.2019
IPC
C22C 38/40 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
18containing chromium
40with nickel
C22C 38/02 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
02containing silicon
C22C 38/04 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
04containing manganese
C22C 38/00 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
C22C 38/50 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
18containing chromium
40with nickel
50with titanium or zirconium
C22C 38/48 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
18containing chromium
40with nickel
48with niobium or tantalum
CPC
C22C 38/00
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
C22C 38/02
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
02containing silicon
C22C 38/04
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
04containing manganese
C22C 38/40
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
18containing chromium
40with nickel
C22C 38/48
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
18containing chromium
40with nickel
48with niobium or tantalum
C22C 38/50
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
18containing chromium
40with nickel
50with titanium or zirconium
Applicants
  • 주식회사 포스코 POSCO [KR]/[KR]
Inventors
  • 김광민 KIM, Kwang Min
  • 오꽃님 OH, Kkoch Nim
  • 김동훈 KIM, Dong-Hoon
Agents
  • 특허법인 세림 SELIM INTELLECTUAL PROPERTY LAW FIRM
Priority Data
10-2018-015101729.11.2018KR
Publication Language Korean (KO)
Filing Language Korean (KO)
Designated States
Title
(EN) FERRITIC STAINLESS STEEL HAVING IMPROVED CORROSION RESISTANCE, AND MANUFACTURING METHOD THEREFOR
(FR) ACIER INOXYDABLE FERRITIQUE AYANT UNE RÉSISTANCE À LA CORROSION AMÉLIORÉE ET SON PROCÉDÉ DE FABRICATION
(KO) 내식성이 향상된 페라이트계 스테인리스강 및 그 제조 방법
Abstract
(EN)
A ferritic stainless steel having improved corrosion resistance is disclosed. The disclosed ferritic stainless steel comprises, by wt%, 0.02% or less (excluding 0) of C, 0.02% or less (excluding 0) of N , 0.5% or less (excluding 0) of Si , 0.3% or less (excluding 0) of Mn , 16-20% of Cr, 0.4% or less (excluding 0) of Ni, and the balance of Fe and inevitable impurities, wherein the amount of Cr by wt%, of the thickness region of 3 nm from the surface of a passivating layer, is at least 1.2 times the amount of Cr by wt%, of stainless steel base metal.
(FR)
Cette invention concerne un acier inoxydable ferritique ayant une résistance à la corrosion améliorée. L'acier inoxydable ferritique selon l'invention comprend, en % en poids : 0,02 % ou moins (à l'exclusion de 0) de C, 0,02 % ou moins (à l'exclusion de 0) de N, 0,5 % ou moins (à l'exclusion de 0) de Si, 0,3 % ou moins (à l'exclusion de 0) de Mn, 16 à 20 % de Cr, 0,4 % ou moins (à l'exclusion de 0) de Ni, le reste étant du Fe et les inévitables impuretés, la teneur en Cr en % en poids de la région de l'épaisseur à 3 nm de la surface d'une couche de passivation étant d'au moins 1,2 fois la teneur Cr en % en poids d'un métal de base en acier inoxydable.
(KO)
내식성이 향상된 페라이트계 스테인리스강이 개시된다. 개시된 페라이트계 스테인리스강은 중량%로, C: 0.02% 이하(0은 제외), N: 0.02% 이하(0은 제외), Si: 0.5% 이하(0은 제외), Mn: 0.3% 이하(0은 제외), Cr: 16 내지 20%, Ni: 0.4% 이하(0은 제외), 나머지는 Fe 및 불가피한 불순물을 포함하고, 부동태 피막의 표면으로부터 3nm 사이의 두께 영역의 Cr 중량% 함량이 상기 스테인리스 모재의 Cr 중량% 함량에 비해 1.2 이상인 것을 특징으로 한다.
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Latest bibliographic data on file with the International Bureau