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1. (WO2018009041) HOT PRESS-FORMED MEMBER HAVING EXCELLENT CRACK PROPAGATION RESISTANCE AND DUCTILITY, AND METHOD FOR PRODUCING SAME
Latest bibliographic data on file with the International Bureau    Submit observation

Pub. No.:    WO/2018/009041    International Application No.:    PCT/KR2017/007328
Publication Date: 11.01.2018 International Filing Date: 07.07.2017
IPC:
C22C 38/04 (2006.01), B21B 3/02 (2006.01), B21B 37/74 (2006.01), C22C 38/02 (2006.01), C22C 38/06 (2006.01), C23C 2/06 (2006.01), C23C 2/40 (2006.01), C22C 38/00 (2006.01), C21D 8/02 (2006.01)
Applicants: POSCO [KR/KR]; (Goedong-dong) 6261, Donghaean-ro, Nam-gu Pohang-si, Gyeongsangbuk-do 37859 (KR)
Inventors: OH, Jin-Keun; (KR).
KIM, Seong-Woo; (KR).
CHO, Yeol-Rae; (KR).
BAK, Won-Mo; (KR)
Agent: C&S PATENT AND LAW OFFICE; 7th Floor, Daelim Acrotel 13, Eonju-ro 30-gil Gangnam-gu, Seoul 06292 (KR)
Priority Data:
10-2016-0086248 07.07.2016 KR
Title (EN) HOT PRESS-FORMED MEMBER HAVING EXCELLENT CRACK PROPAGATION RESISTANCE AND DUCTILITY, AND METHOD FOR PRODUCING SAME
(FR) ÉLÉMENT DE FORMAGE À CHAUD PRÉSENTANT UNE RÉSISTANCE À LA PROPAGATION DES FISSURES ET UNE DUCTILITÉ EXCELLENTES, ET SON PROCÉDÉ DE PRODUCTION
(KO) 균열전파 저항성 및 연성이 우수한 열간성형 부재 및 이의 제조방법
Abstract: front page image
(EN)The present invention relates to a hot press-formed member suitable as a material for a vehicle and, more specifically, to a hot press-formed member having excellent crack propagation resistance and ductility and a method for producing the same. The present invention relates to a hot press-formed member having excellent crack propagation resistance and ductility and a method for producing the same, the hot press-formed member comprising a base steel sheet and a zinc or zinc alloy plating layer formed on at least one surface of the base steel sheet, wherein the base steel sheet includes, by wt%, 0.08-0.30% of carbon (C), 0.01-2.0% of silicon (Si), 3.1-8.0% of manganese (Mn), 0.001-0.5% of aluminum (Al), 0.001-0.05% of phosphorus (P), 0.0001-0.02% of sulfur (S), 0.02% or less of nitrogen (N), and the remaining amount of Fe and other impurities. The hot press-formed member comprises a residual austenite having 1-30 area% as a micro-structure, and a content ratio of Mn (wt%)/Zn (wt%) in an oxide layer of 0.5-1.2 µm in a thickness direction from the surface layer of the plating layer is 0.1 or greater.
(FR)La présente invention concerne un élément de formage à chaud approprié comme matériau pour un véhicule et, plus spécifiquement, un élément de formage à chaud présentant une résistance à la propagation des fissures et une ductilité excellentes, et son procédé de fabrication. Plus précisément, l'invention concerne un élément de formage à chaud présentant une résistance à la propagation des fissures et une ductilité excellentes, et son procédé de fabrication, l'élément de formage à chaud comprenant une tôle d'acier de base et une couche de placage en zinc ou en alliage de zinc formée sur au moins une surface de la tôle d'acier de base, la tôle d'acier de base comprenant, en % en poids, 0,08 à 0,30 % de carbone (C), 0,01 à 2,0 % de silicium (Si), 3,1 à 8,0 % de manganèse (Mn), 0,001 à 0,5 % d'aluminium (Al), 0,001 à 0,05 % de phosphore (P), 0,0001 à 0,02 % de soufre (S), 0,02 % ou moins d'azote (N), et le reste étant constitué de Fe et d'autres impuretés. L'élément de formage à chaud comprend une austénite résiduelle présentant de 1 à 30 % en superficie en tant que microstructure, et un rapport de teneur Mn (% en poids)/Zn (% en poids) dans une couche d'oxyde de 0,5 à 1,2 µm dans la direction de l'épaisseur à partir de la couche de surface de la couche de placage est supérieur ou égal à 0,1.
(KO)본 발명은 자동차용 소재로 적합한 열간성형 부재에 관한 것으로서, 보다 상세하게는 균열전파 저항성 및 연성이 우수한 열간성형 부재 및 그 제조방법에 관한 것이다. 본 발명은 중량%로, 탄소(C): 0.08~0.30%, 실리콘(Si): 0.01~2.0%, 망간(Mn): 3.1~8.0%, 알루미늄(Al): 0.001~0.5%, 인(P): 0.001~0.05%, 황(S): 0.0001~0.02%, 질소(N): 0.02% 이하, 잔부 Fe 및 기타 불순물을 포함하는 소지강판과 소지강판의 적어도 일면에 아연 또는 아연합금 도금층을 포함하는 열간성형 부재로서, 미세조직으로 1~30면적%의 잔류 오스테나이트를 포함하고, 도금층 표층으로부터 두께 방향 0.5~1.2㎛의 산화층 내 Mn(중량%)/Zn(중량%)의 함량비가 0.1 이상인 균열전파 저항성 및 연성이 우수한 열간성형 부재와 그 제조방법에 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, JO, 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 (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)