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1. WO2020111547 - PRESSURE VESSEL STEEL HAVING EXCELLENT HYDROGEN INDUCED CRACKING RESISTANCE, AND MANUFACTURING METHOD THEREFOR

Publication Number WO/2020/111547
Publication Date 04.06.2020
International Application No. PCT/KR2019/014805
International Filing Date 05.11.2019
IPC
C22C 38/42 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
42with copper
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
C22C 38/46 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
46with vanadium
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 38/44 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
44with molybdenum or tungsten
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
CPC
C21D 8/02
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
8Modifying the physical properties by deformation combined with, or followed by, heat treatment
02during manufacturing of plates or strips
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 38/06
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 38/42
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
42with copper
C22C 38/44
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
44with molybdenum or tungsten
Applicants
  • 주식회사 포스코 POSCO [KR]/[KR]
Inventors
  • 김대우 KIM, Dae-Woo
Agents
  • 특허법인 씨엔에스 C&S PATENT AND LAW OFFICE
Priority Data
10-2018-015307730.11.2018KR
Publication Language Korean (KO)
Filing Language Korean (KO)
Designated States
Title
(EN) PRESSURE VESSEL STEEL HAVING EXCELLENT HYDROGEN INDUCED CRACKING RESISTANCE, AND MANUFACTURING METHOD THEREFOR
(FR) ACIER POUR RÉCIPIENT SOUS PRESSION DOTÉ D'UNE EXCELLENTE RÉSISTANCE À LA FISSURATION INDUITE PAR L'HYDROGÈNE ET PROCÉDÉ DE FABRICATION ASSOCIÉ
(KO) 수소유기균열 저항성이 우수한 압력용기용 강재 및 그 제조방법
Abstract
(EN)
The present invention relates to pressure vessel steel having excellent hydrogen-induced cracking resistance, and a manufacturing method therefor. One embodiment of the present invention provides a pressure vessel steel having excellent hydrogen-induced cracking resistance, and a manufacturing method therefor, the steel comprising, by wt%, 0.2-0.3% of carbon (C), 0.05-0.50% of silicon (Si), 0.03% or less of manganese (Mn), 0.005-0.1% of aluminum (Al), 0.010% or less of phosphorus (P), 0.0015% or less of sulfur (S), 0.001-0.03% of niobium (Nb), 0.001-0.03% of vanadium (V), 0.001-0.03% of titanium (Ti), 0.01-0.20% of chromium (Cr), 0.01-0.15% of molybdenum (Mo), 0.01-0.50% of copper (Cu), 0.05-0.50% of nickel (Ni), 0.0005-0.0040% of calcium (Ca), and the balance of Fe and other inevitable impurities, wherein the average grain size of ferrite is 5-15 μm.
(FR)
La présente invention concerne un acier pour récipient sous pression présentant une excellente résistance à la fissuration induite par l'hydrogène, et son procédé de fabrication. Un mode de réalisation selon la présente invention concerne un acier pour récipient sous pression présentant une excellente résistance à la fissuration induite par l'hydrogène, et son procédé de fabrication, l'acier comprenant, en % en poids, entre 0,2 et 0,3% de carbone (C), entre 0,05 et 0,50% de silicium (Si), 0,03% ou moins de manganèse (Mn), entre 0,005 et 0,40% d’aluminium (Al), 0,010% ou moins de phosphore (P), 0,0015% ou moins de soufre (S), entre 0,001 et 0,03% de niobium (Nb), entre 0,001 et 0,03% de vanadium (V), entre 0,001 et 0,03% de titane (Ti), entre 0,01 et 0,20% de chrome (Cr), entre 0,01 et 0,15% de molybdène (Mo), entre 0,01 et 0,50% de cuivre (Cu), entre 0,05 et 0,50% de nickel (Ni), entre 0,0005 et 0,0040% de calcium (Ca), le reste étant constitué de Fe et des autres impuratés inévitables, la granulométrie moyenne de la ferrite étant de 5-15 μm.
(KO)
본 발명은 수소유기균열 저항성이 우수한 압력용기용 강재 및 그 제조방법에 관한 것이다. 본 발명의 일 실시형태는 중량%로, 탄소(C): 0.2~0.3%, 실리콘(Si): 0.05~0.50%, 망간(Mn): 0.03%이하, 알루미늄(Al): 0.005~0.1%, 인(P): 0.010% 이하, 황(S): 0.0015% 이하, 니오븀(Nb): 0.001~0.03%, 바나듐(V): 0.001~0.03%, 티타늄(Ti): 0.001~0.03%, 크롬(Cr): 0.01~0.20%, 몰리브덴(Mo): 0.01~0.15%, 구리(Cu): 0.01~0.50%, 니켈(Ni): 0.05~0.50%, 칼슘(Ca): 0.0005~0.0040%, 잔부 Fe 및 기타 불가피한 불순물을 포함하고, 페라이트의 평균 결정립도가 5~15㎛인 수소유기균열 저항성이 우수한 압력용기용 강재 및 그 제조방법을 제공한다.
Also published as
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