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1. (WO2017111233) HIGH STRENGTH STEEL AND MANUFACTURING METHOD THEREFOR
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2017/111233 International Application No.: PCT/KR2016/007678
Publication Date: 29.06.2017 International Filing Date: 14.07.2016
IPC:
C22C 38/38 (2006.01) ,C22C 38/28 (2006.01) ,C22C 38/26 (2006.01) ,C22C 38/06 (2006.01) ,C22C 38/00 (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
38
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
28
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
26
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
06
containing aluminium
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
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:
(주)포스코 POSCO [KR/KR]; 경상북도 포항시 남구 동해안로 6261 (괴동동) (Geodong-dong) 6261 Donghaean-ro, Nam-gu Pohang-si Gyeongsangbuk-do 37859, KR
Inventors:
서창효 SEO, Chang Hyo; KR
한성호 HAN, Seong Ho; KR
Agent:
특허법인 신세기 SHINSEGI PATENT LAW FIRM; 서울시 강남구 선릉로 119길 25 25, Seolleung-ro 119-gil Gangnam-gu Seoul 06100, KR
Priority Data:
10-2015-018477623.12.2015KR
Title (EN) HIGH STRENGTH STEEL AND MANUFACTURING METHOD THEREFOR
(FR) ACIER À HAUTE RÉSISTANCE ET PROCÉDÉ DE FABRICATION S'Y RAPPORTANT
(KO) 고강도강 및 그 제조방법
Abstract:
(EN) The present invention provides high strength steel and a manufacturing method therefor, the high strength steel comprising, by weight, 0.035-0.07% of C, 0.3% or less (exclusive of 0) of Si, 2.0-3.5% of Mn, 0.3-1.2% of Cr, 0.03-0.08% of Ti, 0.01-0.05% of Nb, and a balance amount of Fe and inevitable impurities, wherein the entire microstructure has a transformed structure containing tempered martensite and bainite at a volume fraction of 90% or more, the tempered martensite structure having an average particle diameter of 2μm or less, the bainite structure having an average particle diameter of 3μm or less, with a volume fraction of 5 % or less of a bainite structure greater than 3μm in particle diameter.
(FR) La présente invention concerne de l'acier à haute résistance et un procédé de fabrication s'y rapportant, l'acier à haute résistance comprenant, en poids, 0,035 à 0,07 % de C, 0,3 % ou moins (0 étant exclu) de Si, 2,0 à 3,5 % de Mn, 0,3 à 1,2 % de Cr, 0,03 à 0,08 % de Ti, 0,01 à 0,05 % de Nb et le reste de Fe et d'impuretés inévitables, la microstructure totale ayant une structure transformée contenant de la martensite revenue et de la bainite en une fraction volumique supérieure ou égale à 90 %, la structure de martensite revenue ayant un diamètre moyen des particules inférieur ou égal à 2 µm, la structure de bainite ayant un diamètre moyen des particules inférieur ou égal à 3 μm, avec une fraction volumique inférieure ou égale à 5 % d'une structure de bainite ayant un diamètre des particules supérieur à 3 μm.
(KO) 본 발명에 의한 고강도강 및 그 제조방법은, 중량 %로 C: 0.035~0.07%, Si: 0.3%이하(0은 제외), Mn: 2.0~3.5%, Cr: 0.3~1.2%, Ti: 0.03~0.08%, Nb: 0.01~0.05%, 잔부 Fe 및 불가피한 불순물을 포함하고, 전체 미세조직 중 템퍼드 마르텐사이트 및 베이나이트를 포함하는 변태조직이 차지하는 부피 분율이 90% 이상이며, 템퍼드 마르텐사이트 조직의 평균입경이 2㎛ 이하이고, 베이나이트 조직의 평균입경이 3㎛ 이하이며, 입경이 3㎛를 초과하는 베이나이트 조직의 부피 분율이 5% 이하인 것을 특징으로 한다.
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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, 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, 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)