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1. (WO2017111290) STEEL PLATE HAVING EXCELLENT PWHT RESISTANCE FOR LOW-TEMPERATURE PRESSURE VESSEL AND METHOD FOR MANUFACTURING SAME
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2017/111290 International Application No.: PCT/KR2016/012566
Publication Date: 29.06.2017 International Filing Date: 03.11.2016
IPC:
C22C 38/12 (2006.01) ,C22C 38/08 (2006.01) ,C22C 38/04 (2006.01) ,C22C 38/02 (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
12
containing tungsten, tantalum, molybdenum, vanadium or niobium
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
08
containing nickel
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
04
containing 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
02
containing silicon
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:
홍순택 HONG, Soon-Taik; 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:
10-2015-018352822.12.2015KR
Title (EN) STEEL PLATE HAVING EXCELLENT PWHT RESISTANCE FOR LOW-TEMPERATURE PRESSURE VESSEL AND METHOD FOR MANUFACTURING SAME
(FR) TÔLE D'ACIER PRÉSENTANT UNE EXCELLENTE RÉSISTANCE AU TRAITEMENT THERMIQUE APRÈS SOUDAGE POUR RÉCIPIENT SOUS PRESSION À BASSE TEMPÉRATURE ET SON PROCÉDÉ DE FABRICATION
(KO) PWHT 저항성이 우수한 저온 압력용기용 강판 및 그 제조 방법
Abstract:
(EN) The present invention relates to a steel plate having excellent PWHT resistance and low-temperature toughness for a low-temperature pressure vessel and a method for manufacturing the same, wherein the steel plate comprises, in terms of wt%, 0.07-0.17% of C, 0.15-0.40% of Si, 0.3-0.7% of Mn, 0.012% or less of P, 0.015% or less of S, 3.0-4.0% of Ni, 0.03-0.25% of W, and the balance of Fe and inevitable impurities, has a micro-structure comprising 25-80 area% of tempered bainite and the balance of tempered martensite, and has a tensile strength of 600 MPa or more.
(FR) La présente invention concerne une tôle d'acier présentant une résistance au traitement thermique après soudage et une ténacité à basse température excellentes pour un récipient sous pression à basse température et son procédé de fabrication, la tôle d'acier comprenant, en termes de % en poids, 0,07 à 0,17 % de C, 0,15 à 0,40 % de Si, de 0,3 à 0,7 % de Mn, 0,012 % ou moins de P, 0,015 % ou moins de S, 3,0 à 4,0 % de Ni, 0,03 à 0,25 % de W, le reste étant du Fe et les inévitables impuretés. Ladite tôle d'acier possède une microstructure comprenant de 25 à 80 % en surface de bainite revenue, le reste étant de la martensite revenue, et elle présente une résistance à la traction supérieure ou égale à 600 MPa.
(KO) 본 발명은, 중량%로, C: 0.07 ~ 0.17%, Si: 0.15 ~ 0.40%, Mn: 0.3 ~ 0.7%, P: 0.012% 이하, S: 0.015%이하, Ni: 3.0 ~ 4.0%, W : 0.03~0.25%, 잔부 Fe 및 불가피한 불순물로 이루어지며, 미세조직이 25~80 면적%의 템퍼드 베이나이트와 잔부 템퍼드 마르텐사이트로 이루어지고 인장강도 600MPa 이상인 저온인성과 PWHT 저항성이 우수한 저온용 압력용기 강판 및 그 제조 방법에 관한 것이다.
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, 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:
CN108431272EP3395984US20180371568