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1. (WO2017111416) STEEL MATERIAL HAVING EXCELLENT HYDROGEN INDUCED CRACKING (HIC) RESISTANCE FOR PRESSURE VESSEL AND MANUFACTURING METHOD THEREFOR
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2017/111416 International Application No.: PCT/KR2016/014903
Publication Date: 29.06.2017 International Filing Date: 19.12.2016
IPC:
C22C 38/58 (2006.01) ,C22C 38/50 (2006.01) ,C22C 38/48 (2006.01) ,C22C 38/46 (2006.01) ,C22C 38/44 (2006.01) ,C22C 38/42 (2006.01) ,C22C 38/54 (2006.01) ,C21D 8/02 (2006.01)
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
18
containing chromium
40
with nickel
58
with more than 1.5% by weight of manganese
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
18
containing chromium
40
with nickel
50
with titanium or zirconium
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
18
containing chromium
40
with nickel
48
with niobium or tantalum
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
18
containing chromium
40
with nickel
46
with vanadium
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
18
containing chromium
40
with nickel
44
with molybdenum or tungsten
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
18
containing chromium
40
with nickel
42
with copper
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
18
containing chromium
40
with nickel
54
with boron
C CHEMISTRY; METALLURGY
21
METALLURGY OF IRON
D
MODIFYING 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
8
Modifying the physical properties by deformation combined with, or followed by, heat treatment
02
during manufacturing of plates or strips
Applicants:
주식회사 포스코 POSCO [KR/KR]; 경상북도 포항시 남구 동해안로 6261 (괴동동) (Goedong-dong) 6261, Donghaean-ro, Nam-gu Pohang-si, Gyeongsangbuk-do 37859, KR
Inventors:
김대우 KIM, Dae-Woo; KR
Agent:
특허법인 씨엔에스 C&S PATENT AND LAW OFFICE; 서울시 강남구 언주로 30길 13, 대림아크로텔 7층 7th Floor, Daelim Acrotel 13 Eonju-ro 30-gil Gangnam-gu, Seoul 06292, KR
Priority Data:
10-2015-018550023.12.2015KR
Title (EN) STEEL MATERIAL HAVING EXCELLENT HYDROGEN INDUCED CRACKING (HIC) RESISTANCE FOR PRESSURE VESSEL AND MANUFACTURING METHOD THEREFOR
(FR) MATÉRIAU EN ACIER AYANT UNE EXCELLENTE RÉSISTANCE À LA FISSURATION PAR L’HYDROGÈNE (HIC) POUR RÉCIPIENT SOUS PRESSION ET PROCÉDÉ DE FABRICATION ASSOCIÉ
(KO) 수소유기 균열 (HIC) 저항성이 우수한 압력용기용 강재 및 그 제조방법
Abstract:
(EN) An aspect of the present invention is to provide: a steel material for a pressure vessel, the steel material having excellent resistance to hydrogen induced cracking (HIC) in a hydrogen sulfide atmosphere, while having excellent moldability and high strength, by optimizing the component composition and manufacturing conditions of steel; and a manufacturing method therefor. According to one aspect of the present invention, there are provided a steel material having excellent hydrogen induced cracking (HIC) resistance for a pressure vessel and a manufacturing method therefor, wherein the steel material comprises: one or two of, in terms of wt%, 0.10-0.25% of carbon (C), 0.05-0.50% of silicon (Si), 1.0-2.0% of manganese (Mn), 0.005-0.1% of aluminum (Al), 0.010% or less of phosphorous (P), 0.0015% or less of sulfur (S), 30-70 ppm of nitrogen (N), 0.001-0.03% of titanium (Ti), 0.02-0.50% of copper (Cu), 0.05-0.50% of nickel (Ni), 0.0005-0.0040% of calcium (Ca), 0.001-0.03% of niobium (Nb), 0.001-0.03% of vanadium (V), 0.01-0.20% of chromium (Cr), 0.05-0.15% of molybdenum (Mo), and the balance Fe and other unavoidable impurities, the microstructure comprising at least 40 vol% of air-cooled bainite and the remainder ferrite, Nb (C, N) carbonitrides with a diameter of 5-30 nm being contained in 0.01 wt% or more. According to the present invention, a steel material having excellent hydrogen induced cracking (HIC) resistance for a pressure vessel can be obtained.
(FR) Selon un aspect, la présente invention concerne : un matériau en acier pour un récipient sous pression, le matériau en acier ayant une excellente résistance à la fissuration par l’hydrogène (HIC) dans une atmosphère de sulfure d’hydrogène, tout en ayant une excellente aptitude au moulage et une haute résistance, par optimisation de la composition des constituants et des conditions de fabrication de l’acier ; un procédé de fabrication associé. Selon un aspect, la présente invention concerne un matériau en acier pour un récipient sous pression, le matériau en acier ayant une excellente résistance à la fissuration par l’hydrogène (HIC) pour un récipient sous pression, et un procédé de fabrication associé, le matériau en acier comprenant, en termes de % en poids, 0,10 à 0,25 % de carbone (C), 0,05 à 0,50 % de silicium (Si), 1,0 à 2,0 % de manganèse (Mn), 0,005 à 0,1 % d’aluminium (Al), 0,010 % ou moins de phosphore (P), 0,0015 % ou moins de soufre (S), 30 à 70 ppm d’azote (N), 0,001 à 0,03 % de titane (Ti), 0,02 à 0,50 % de cuivre (Cu), 0,05 à 0,50 % de nickel (Ni), 0,0005 à 0,0040 % de calcium (Ca), 0,001 à 0,03 % de niobium (Nb), 0,001 à 0,03 % de vanadium (V), 0,01 à 0,20 % de chrome (Cr), 0,05 à 0,15 % de molybdène (Mo) et le reste étant du Fe et les impuretés inévitables et/ou une microstructure comprenant au moins 40 % en volume de bainite refroidie à l’air et le reste étant du ferrite, les carbonitrures Nb(C,N) ayant un diamètre de 5 à 30 nm étant contenus à hauteur de 0,01 % en poids ou plus. Selon la présente invention, un matériau en acier ayant une excellente résistance à la fissuration par l’hydrogène (HIC) pour un récipient sous pression peut être obtenu.
(KO) 본 발명의 일 측면은 강의 성분조성 및 제조조건을 최적화 함으로써, 우수한 성형성 및 높은 강도를 가지면서 황화수소 분위기에서 수소유기 균열(HIC)에 대한 저항성이 우수한 압력용기용 강재 및 그 제조방법을 제공하고자 하는 것이다. 본 발명의 일 측면에 의하면, 중량%로, 탄소(C): 0.10~0.25%; 실리콘(Si): 0.05~0.50%; 망간(Mn): 1.0~ 2.0%; 알루미늄(Al): 0.005~0.1%; 인(P): 0.010% 이하; 황(S): 0.0015% 이하; 질소(N): 30 ~ 70ppm; 티타늄(Ti): 0.001~0.03%; 구리(Cu): 0.02~0.50%; 니켈(Ni): 0.05~0.50%; 칼슘(Ca):0.0005~0.0040%; 니오븀(Nb): 0.001~0.03%; 바나듐(V): 0.001~0.03%; 크롬(Cr): 0.01~0.20%과 몰리브덴(Mo): 0.05~0.15%중 1종 또는 2종; 잔부 Fe 및 기타 불가피한 불순물을 포함하고;미세조직이 40 부피%이상의 공냉 베이나이트 및 잔부 페라이트를 포함하고; 그리고 직경 5~30nm의 Nb(C,N) 탄질화물을 0.01중량%이상 포함하는 수소유기 균열 (HIC) 저항성이 우수한 압력용기용 강재 및 그 제조방법이 제공된다. 본 발명에 따르면, 수소유기 균열 (HIC) 저항성이 우수한 압력용기용 강재를 얻을 수 있다.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KH, KN, KP, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: Korean (KO)
Filing Language: Korean (KO)
Also published as:
CA3009461CN108368595EP3395999US20190024206