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1. WO2020067650 - FERRITIC STAINLESS STEEL AND FERRITIC STAINLESS STEEL PIPE WITH IMPROVED MECHANICAL PROPERTIES OF WELDING PORTION

Publication Number WO/2020/067650
Publication Date 02.04.2020
International Application No. PCT/KR2019/010788
International Filing Date 23.08.2019
IPC
C22C 38/28 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
28with titanium or zirconium
C22C 38/26 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
26with niobium or tantalum
C22C 38/06 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
06containing aluminium
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 38/22 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
22with molybdenum or tungsten
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
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 38/06
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
06containing aluminium
C22C 38/20
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
18containing chromium
20with copper
C22C 38/22
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
18containing chromium
22with molybdenum or tungsten
C22C 38/26
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
18containing chromium
26with niobium or tantalum
C22C 38/28
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
18containing chromium
28with titanium or zirconium
Applicants
  • 주식회사 포스코 POSCO [KR]/[KR]
Inventors
  • 이계만 LEE, Kye-Man
  • 박재석 PARK, Jae-Seok
Agents
  • 특허법인 세림 SELIM INTELLECTUAL PROPERTY LAW FIRM
Priority Data
10-2018-011526327.09.2018KR
Publication Language Korean (KO)
Filing Language Korean (KO)
Designated States
Title
(EN) FERRITIC STAINLESS STEEL AND FERRITIC STAINLESS STEEL PIPE WITH IMPROVED MECHANICAL PROPERTIES OF WELDING PORTION
(FR) ACIER INOXYDABLE FERRITIQUE ET TUYAU EN ACIER INOXYDABLE FERRITIQUE AYANT DES PROPRIÉTÉS MÉCANIQUES AMÉLIORÉES D'UNE PARTIE DE SOUDAGE
(KO) 용접부의 기계적 성질이 향상된 페라이트계 스테인리스강 및 페라이트계 스테인리스 강관
Abstract
(EN)
Disclosed is a ferritic stainless steel with improved mechanical properties of a welding portion. The disclosed ferritic stainless steel comprises, by weight%: 0.005 to 0.02% of C, 0.005 to 0.02% of N, 11.0 to 13.0% of Cr, 0.16 to 0.3% of Ti, 0.1 to 0.3% of Nb, and 0.005 to 0.05% of Al, the remainder being Fe and unavoidable impurities, wherein the maximum strength of an aggregate structure in the {1} direction after welding is 30 or less.
(FR)
L'invention concerne un acier inoxydable ferritique ayant des propriétés mécaniques améliorées d'une partie de soudage. L'acier inoxydable ferritique de l'invention comprend, en % en poids : de 0,005 à 0,02 % de C, de 0,005 à 0,02 % de N, de 11,0 à 13,0 % de Cr, de 0,16 à 0,3 % de Ti, de 0,1 à 0,3 % de Nb, et 0,005 à 0,05 % d'Al, le reste étant du Fe et des impuretés inévitables, la résistance maximale d'une structure d'agrégat dans la direction {1} après le soudage étant inférieure ou égale à 30.
(KO)
용접부의 기계적 성질이 향상된 페라이트계 스테인리스강이 개시된다. 개시된 페라이트계 스테인리스강은 중량 %로, 중량%로, C: 0.005 내지 0.02%, N: 0.005 내지 0.02%, Cr: 11.0 내지 13.0%, Ti: 0.16 내지 0.3%, Nb: 0.1 내지 0.3%, Al: 0.005 내지 0.05%를 포함하고, 나머지는 Fe 및 불가피한 불순물을 포함하고, 용접 후 {001} 방향의 집합조직 최대강도가 30 이하인 것을 특징으로 한다.
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