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1. (WO2010123315) HIGH STRENGTH, HIGH TOUGHNESS STEEL WIRE ROD, AND METHOD FOR MANUFACTURING SAME
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2010/123315    International Application No.:    PCT/KR2010/002568
Publication Date: 28.10.2010 International Filing Date: 23.04.2010
IPC:
C22C 38/00 (2006.01), C21D 8/06 (2006.01), B21B 1/16 (2006.01)
Applicants: POSCO [KR/KR]; 1 Koedong-dong, Nam-gu Pohang, Kyungsangbook-do 790-300 (KR) (For All Designated States Except US).
KIM, Dong-Hyun [KR/KR]; (KR) (For US Only).
LEE, You-Hwan [KR/KR]; (KR) (For US Only).
LEE, Sang-Yoon [KR/KR]; (KR) (For US Only).
CHO, Hyung-Keun [KR/KR]; (KR) (For US Only)
Inventors: KIM, Dong-Hyun; (KR).
LEE, You-Hwan; (KR).
LEE, Sang-Yoon; (KR).
CHO, Hyung-Keun; (KR)
Agent: C&S LOGOS PATENT AND LAW OFFICE; 13th Floor, Seocho-Pyunghwa Building, 1451-34 Seocho-dong, Seocho-gu Seoul 137-070 (KR)
Priority Data:
10-2009-0035699 23.04.2009 KR
Title (EN) HIGH STRENGTH, HIGH TOUGHNESS STEEL WIRE ROD, AND METHOD FOR MANUFACTURING SAME
(FR) FIL MACHINE EN ACIER DE RÉSISTANCE ET DE SOLIDITÉ ÉLEVÉES, ET SON PROCÉDÉ DE FABRICATION
(KO) 고강도 고인성 강선재 및 그 제조방법
Abstract: front page image
(EN)The present invention relates to a high strength, high toughness steel wire rod and to a method for manufacturing same, and more particularly, to a high strength, high toughness steel wire rod useful in cold heading, etc., which not only uses less alloy elements and has an excellent dimensional accuracy compared to quenched and tempered steel wire rods produced by conventional heat treatment processes, but can also be manufactured by a simple method as compared to conventional steel wire rods that are not quenched and tempered. The steel wire rod of the present invention has a composition including nitrogen such that Al may be present in an amount of 0.07 to 0.14 wt % and the ratio of Al:N (i.e., the wt % of each element) can be 15:1 to 25:1. According to the present invention, a steel wire rod which has strength and toughness enhancing effects sufficient for a simple alloy component system can be obtained, and thus, a steel wire rod can be provided through processing by cold heading, etc. without additional heat treatment.
(FR)La présente invention concerne un fil machine en acier de résistance et de solidité élevées et son procédé de fabrication et, plus particulièrement, un fil machine en acier de résistance et de solidité élevées pouvant être utilisé en frappe à froid, etc. D'une part, ce fil machine en acier utilise moins d'éléments d'alliage et présente une excellente précision dimensionnelle par rapport aux fils machines en acier trempés et revenus produits par les procédés classiques de traitement thermique et, d'autre part, ce fil machine en acier peut également être fabriqué par un procédé simple par rapport aux fils machines en acier classiques qui ne sont pas trempés et revenus. La composition du fil machine en acier de la présente invention inclut de l'azote, de sorte que Al peut être présent en une quantité de 0,07 % à 0,14 % en poids et que le rapport Al : N (c'est-à-dire, le % en poids de chaque élément) peut être de 15 : 1 à 25 : 1. Selon la présente invention, un fil machine en acier qui possède des effets renforçant la résistance et la solidité suffisants pour un système simple de composants d'alliage peut être obtenu et, par conséquent, un fil machine en acier peut être produit par un procédé de frappe à froid, etc., sans traitement thermique supplémentaire.
(KO)본 발명은 고강도 고인성 강선재 및 그 제조방법에 관한 것으로서, 보다 상세하게는 냉간압조 등의 용도로 사용되는 강선재로서 종래의 열처리 과정에 의해 생성되는 조질 강선재에 비하여 합금원소 사용량이 감소하고 치수 정밀도가 우수할 뿐만 아니라, 통상의 비조질 강선재에 비하여 간편한 방법으로 제조될 수 있는 고강도 고인성 강선재에 관한 것이다. 본 발명의 강선재는 Al : 0.07~0.14중량%와 Al:N(각 원소의 중량%를 의미함)이 15:1~25:1이 되도록 질소를 포함하는 조성을 가진다. 본 발명에 따르면 간단한 합금성분계로서 충분한 강도 향상과 인성 향상효과를 가진 강선재를 얻을 수 있으므로, 추가적인 열처리 없이 냉간압조 등의 가공이 가능한 강선재를 제공할 수 있다.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, 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, IS, JP, KE, KG, KM, KN, KP, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PE, PG, PH, PL, PT, RO, RS, RU, 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, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (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, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: Korean (KO)
Filing Language: Korean (KO)