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1. (WO2012042676) HIGH-STRENGTH STEEL SHEET AND METHOD FOR PRODUCING SAME
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2012/042676    International Application No.:    PCT/JP2010/067611
Publication Date: 05.04.2012 International Filing Date: 30.09.2010
IPC:
C23C 8/14 (2006.01), C21D 9/46 (2006.01), C22C 38/00 (2006.01), C22C 38/06 (2006.01), C22C 38/58 (2006.01)
Applicants: JFE STEEL CORPORATION [JP/JP]; 2-3,Uchisaiwai-cho 2-chome, Chiyoda-ku, Tokyo 1000011 (JP) (For All Designated States Except US).
FUSHIWAKI, Yusuke [JP/JP]; (JP) (For US Only).
SUZUKI, Yoshitsugu [JP/JP]; (JP) (For US Only)
Inventors: FUSHIWAKI, Yusuke; (JP).
SUZUKI, Yoshitsugu; (JP)
Agent: OCHIAI, Kenichiro; c/o Patent Application Department, JFE TECHNO-RESEARCH CORPORATION, 7th Floor Yanagiya Building, 1-10,Nihonbashi 2-chome, Chuo-ku, Tokyo 1030027 (JP)
Priority Data:
Title (EN) HIGH-STRENGTH STEEL SHEET AND METHOD FOR PRODUCING SAME
(FR) TÔLE D'ACIER À HAUTE RÉSISTANCE ET PROCÉDÉ DE PRODUCTION ASSOCIÉ
(JA) 高強度鋼板およびその製造方法
Abstract: front page image
(EN)Provided are: a high-strength steel sheet having superior chemical conversion treatability and post-electrodeposition corrosion resistance even if the amount of contained Si is large; and a method for producing the high-strength steel sheet. A steel sheet containing, by mass%, 0.01-0.18% C, 0.4-2.0% Si, 1.0-3.0% Mn, 0.001-1.0% Al, 0.005-0.060% P, and S≤0.01%, the remainder comprising Fe and unavoidable impurities, is continuously annealed, during which the temperature region inside the annealing furnace of at least 750°C is caused to have a dew point within the ambient atmosphere of no greater than -40°C.
(FR)L'invention concerne une tôle d'acier à haute résistance présentant une aptitude au traitement par conversion chimique et une résistante à la corrosion post-électrodéposition supérieures, même lorsque la quantité de Si contenu est importante. L'invention concerne également un procédé de production associé. Selon ce procédé, une tôle d'acier contenant, en % en masse, 0,01-0,18% de C, 0,4-2% de Si, 1-3% de Mn, 0,001-1% de Al, 0,005-0,060% de P et S≤0,01%, le reste étant constitué de Fe et d'impuretés inévitables, est recuite en continu, la plage de températures à l'intérieur du four de recuit d'au moins 750°C devant présenter un point de rosée, à l'air ambiant, non supérieur à -40°C.
(JA)Siの含有量が多い場合でも、優れた化成処理性及び電着塗装後の耐食性を有する高強度鋼板およびその製造方法を提供する。質量%で、C:0.01~0.18%、Si:0.4~2.0%、Mn:1.0~3.0%、Al:0.001~1.0%、P:0.005~0.060%、S≦0.01%を含有し、残部がFeおよび不可避的不純物からなる鋼板に、連続焼鈍を施す際に、焼鈍炉内温度:750℃以上の温度域を雰囲気中の露点:-40℃以下とする。
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, KR, 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 (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, 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: Japanese (JA)
Filing Language: Japanese (JA)