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1. (WO2011142356) HIGH-STRENGTH STEEL SHEET AND METHOD FOR PRODUCING SAME
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2011/142356    International Application No.:    PCT/JP2011/060760
Publication Date: 17.11.2011 International Filing Date: 10.05.2011
IPC:
C22C 38/00 (2006.01), C21D 9/46 (2006.01), C22C 38/14 (2006.01), C22C 38/58 (2006.01), C21C 7/04 (2006.01)
Applicants: NIPPON STEEL & SUMITOMO METAL CORPORATION [JP/JP]; 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071 (JP) (For All Designated States Except US).
SUWA Yoshihiro [JP/JP]; (JP) (For US Only).
YAMAMOTO Kenichi [JP/JP]; (JP) (For US Only).
MAEDA Daisuke [JP/JP]; (JP) (For US Only).
HIROSE Satoshi [JP/JP]; (JP) (For US Only).
SHIGESATO Genichi [JP/JP]; (JP) (For US Only).
YOSHINAGA Naoki [JP/JP]; (JP) (For US Only)
Inventors: SUWA Yoshihiro; (JP).
YAMAMOTO Kenichi; (JP).
MAEDA Daisuke; (JP).
HIROSE Satoshi; (JP).
SHIGESATO Genichi; (JP).
YOSHINAGA Naoki; (JP)
Agent: SHIGA Masatake; 1-9-2, Marunouchi, Chiyoda-ku, Tokyo 1006620 (JP)
Priority Data:
2010-108431 10.05.2010 JP
2010-133709 11.06.2010 JP
Title (EN) HIGH-STRENGTH STEEL SHEET AND METHOD FOR PRODUCING SAME
(FR) TÔLE D'ACIER À HAUTE RÉSISTANCE ET SON PROCÉDÉ DE PRODUCTION
(JA) 高強度鋼板及びその製造方法
Abstract: front page image
(EN)The disclosed high-strength steel sheet contains, by mass %, 0.03-0.30% C, 0.08-2.1% Si, 0.5-4.0% Mn, no greater than 0.05% P, 0.0001-0.1% S, no greater than 0.01% N, over 0.004% and no greater than 2.0% acid-soluble Al, 0.0001-0.20% acid soluble Ti, and a total of 0.001-0.04% of at least one element selected from Ce and La, the remainder comprising iron and unavoidable impurities; defining the mass % of Ce, La, acid-soluble Al, and S respectively as [Ce], [La], [acid-soluble Al], and [S], [Ce], [La], [acid-soluble Al], and [S] satisfy 0.02 ≤ ([Ce]+[La])/[acid-soluble Al] < 0.25, and 0.4 ≤ ([Ce]+[La])/[S]≤50; and the steel structure contains 1-50% martensite by area ratio.
(FR)L'invention concerne une tôle d'acier à haute résistance qui contient, en pourcentage massique, 0,03-0,30 % de C, 0,08-2,1 % de Si, 0,5-4,0 % de Mn, pas plus de 0,05 % de P, 0,0001-0,1 % de S, pas plus de 0,01 % de N, plus de 0,004 %, mais pas plus de 2,0 % d'Al acidosoluble, 0,0001-0,20 % de Ti acidosoluble, et un total de 0,001-0,04 % d'au moins un élément choisi parmi Ce et La, le solde étant du fer et les inévitables impuretés. En définissant le pourcentage massique de Ce, La, Al acidosoluble et S respectivement comme [Ce], [La], [Al acidosoluble] et [S], les relations suivantes sont satisfaites : 0,02 ≤ ([Ce]+[La])/[Al acidosoluble] < 0,25, et 0,4 ≤ ([Ce]+[La])/[S] ≤ 50. La structure d'acier contient 1-50 % de martensite en proportion surfacique.
(JA) この高強度鋼板は、質量%で、C:0.03~0.30%、Si:0.08~2.1%、Mn:0.5~4.0%、P:0.05%以下、S:0.0001~0.1%、N:0.01%以下、酸可溶Al:0.004%超かつ2.0%以下、酸可溶Ti:0.0001~0.20%、Ce、Laから選択される少なくとも1種の合計:0.001~0.04%を含有し、残部が鉄及び不可避的不純物からなり、Ce、La、酸可溶Al及びSの質量%を、それぞれ、[Ce]、[La]、[酸可溶Al]及び[S]と定義した場合に、[Ce]、[La]、[酸可溶Al]及び[S]が、0.02≦([Ce]+[La])/[酸可溶Al]<0.25、かつ、0.4≦([Ce]+[La])/[S]≦50を満たし、鋼組織が、面積率で1~50%のマルテンサイトを含む。
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, RS, 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)