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1. (WO2018142450) STEEL SHEET
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Pub. No.: WO/2018/142450 International Application No.: PCT/JP2017/003338
Publication Date: 09.08.2018 International Filing Date: 31.01.2017
C22C 38/00 (2006.01) ,C22C 38/58 (2006.01) ,C21D 9/46 (2006.01)
Applicants: NIPPON STEEL & SUMITOMO METAL CORPORATION[JP/JP]; 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071, JP
Inventors: NAKANO, Katsuya; JP
TODA, Yuri; JP
UENISHI, Akihiro; JP
Agent: KOKUBUN, Takayoshi; JP
Priority Data:
(JA) 鋼板
(EN) Provided is a steel sheet that has a prescribed chemical composition and that has a metal structure: which contains, in terms of areal proportions, 50-95% of ferrite, 5-48% of granular bainite, 2-30% of tempered martensite and a total of 5% or less of upper bainite, lower bainite, fresh martensite, retained austenite and pearlite; and in which the product obtained by multiplying the areal proportion of tempered martensite by the Vickers hardness of the tempered martensite is 800-10,500.
(FR) L'invention concerne une tôle d'acier présentant une composition chimique prescrite et présentant une structure métallique : contenant, en termes de proportions surfaciques, de 50 à 95 % de ferrite, de 5 à 48 % de bainite granulaire, de 2 à 30 % de martensite revenue et un total inférieur ou égal à 5 % de bainite supérieure, de bainite inférieure, de martensite fraîche, d'austénite résiduelle et de perlite ; et le produit obtenu par multiplication de la proportion surfacique de martensite revenue par la dureté Vickers de la martensite revenue étant compris entre 800 et 10 500.
(JA) 鋼板は所定の化学組成を有し、面積分率で、フェライト:50%~95%、グラニュラーベイナイト:5%~48%、焼戻しマルテンサイト:2%~30%、上部ベイナイト、下部ベイナイト、フレッシュマルテンサイト、残留オーステナイト及びパーライト:合計で5%以下、並びに焼戻しマルテンサイトの面積分率と焼戻しマルテンサイトのビッカース硬さとの積:800~10500で表される金属組織を有する。
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, JP, KE, KG, KH, KN, KP, KR, 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 (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (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: Japanese (JA)
Filing Language: Japanese (JA)