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1. (WO2015037246) STEEL FOR SPRING, AND METHOD FOR PRODUCING SPRING
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2015/037246    International Application No.:    PCT/JP2014/004722
Publication Date: 19.03.2015 International Filing Date: 11.09.2014
IPC:
C22C 38/00 (2006.01), C21D 8/06 (2006.01), C22C 38/60 (2006.01), F16F 1/02 (2006.01), C21D 9/02 (2006.01)
Applicants: JFE STEEL CORPORATION [JP/JP]; 2-3, Uchisaiwai-cho 2-chome, Chiyoda-ku, Tokyo 1000011 (JP).
SUMIHATSU CO., LTD. [JP/JP]; 5-5, Iwamoto-cho 3-chome, Chiyoda-ku, Tokyo 1010032 (JP) (AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BE, BF, BG, BH, BJ, BN, BR, BW, BY, BZ, CA, CF, CG, CH, CI, CL, CM, CN, CO, CR, CU, CY, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, FR, GA, GB, GD, GE, GH, GM, GN, GQ, GR, GT, GW, HN, HR, HU, ID, IE, IL, IN, IR, IS, IT, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LV, LY, MA, MC, MD, ME, MG, MK, ML, MN, MR, MT, MW, MX, MY, MZ, NA, NE, NG, NI, NL, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SI, SK, SL, SM, SN, ST, SV, SY, SZ, TD, TG, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, ZA, ZM, ZW only).
NHK SPRING CO., LTD. [JP/JP]; 10, Fukuura 3-chome, Kanazawa-ku, Yokohama-shi, Kanagawa 2360004 (JP) (AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BE, BF, BG, BH, BJ, BN, BR, BW, BY, BZ, CA, CF, CG, CH, CI, CL, CM, CN, CO, CR, CU, CY, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, FR, GA, GB, GD, GE, GH, GM, GN, GQ, GR, GT, GW, HN, HR, HU, ID, IE, IL, IN, IR, IS, IT, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LV, LY, MA, MC, MD, ME, MG, MK, ML, MN, MR, MT, MW, MX, MY, MZ, NA, NE, NG, NI, NL, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SI, SK, SL, SM, SN, ST, SV, SY, SZ, TD, TG, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, ZA, ZM, ZW only)
Inventors: HONJO, Minoru; (JP).
UWAI, Kiyoshi; (JP).
ENDO, Shigeru; (JP).
YAMASHITA, Katsutoshi; (JP).
TSURU, Koei; (JP).
FUJIE, Keiichi; (JP).
TANGE, Akira; (JP)
Agent: SUGIMURA, Kenji; (JP)
Priority Data:
2013-188516 11.09.2013 JP
Title (EN) STEEL FOR SPRING, AND METHOD FOR PRODUCING SPRING
(FR) ACIER À RESSORT ET SON PROCÉDÉ DE PRODUCTION
(JA) ばね用鋼およびばねの製造方法
Abstract: front page image
(EN)Provided is a steel for a high strength spring, in which excellent decarburization resistance and scale strippability are achieved by optimizing the quantities of Sb and Sn, in addition to C, Si, Mn and Cr, added to a conventional steel for a high strength spring. This steel contains, under prescribed conditions, more than 0.45 mass % but less than 0.65 mass % of C, 0.15-0.70 mass % of Si, 0.10-1.00 mass % of Mn, 0.20-1.50 mass % of Cr, not more than 0.025 mass % of P, not more than 0.025 mass % of S, not more than 0.0015 mass % of O, not less than 0.010 mass % but less than 0.030 mass % of Sb, and 0.010-0.030 mass % of Sn.
(FR)L'invention concerne de l'acier pour ressort à résistance élevée, dans lequel une excellente résistance à la décarburation et une excellente aptitude au pelage de la calamine sont obtenues par optimisation des quantités de Sb et de Sn, en plus de C, Si, Mn et Cr ajoutés à l'acier classique pour un ressort à résistance élevée. L'acier contient en masse, dans des conditions prédéfinies, au maximum 0,45 % mais moins de 0,65 % de C, 0,15 à 0,70 % de Si, 0,10 à 1,00 % de Mn, 0,20 à 1,50 % de Cr, au maximum 0,025 % de P, au maximum 0,025 % de S, au maximum 0,0015 % de O, au maximum 0,010 % mais moins 0,030 % de Sb et 0,010 à 0,030 % de Sn.
(JA) 従来の高強度ばね用鋼に対して、C、Si、MnおよびCrに加えて、SbおよびSnの添加量の適正化を行うことによって、耐脱炭性に優れ、かつスケール剥離性に優れた高強度ばね用鋼を提供する。 C:0.45質量%超0.65質量%未満、Si:0.15質量%以上0.70質量%以下、Mn:0.10質量%以上1.00質量%以下、Cr:0.20質量%以上1.50質量%以下、P:0.025質量%以下、S:0.025質量%以下、O:0.0015質量%以下、Sb:0.010質量%以上0.030質量%未満およびSn:0.010質量%以上0.030質量%以下を、所定の条件下に含有する。
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, 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, KN, KP, KR, 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: Japanese (JA)
Filing Language: Japanese (JA)