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1. (WO2013058131) BEARING STEEL AND METHOD FOR PRODUCING SAME
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2013/058131    International Application No.:    PCT/JP2012/076042
Publication Date: 25.04.2013 International Filing Date: 05.10.2012
IPC:
C22C 38/00 (2006.01), B22D 27/02 (2006.01), C21C 7/00 (2006.01), C21C 7/04 (2006.01), C21C 7/06 (2006.01), C21D 9/00 (2006.01), C22C 38/28 (2006.01), C22C 38/54 (2006.01), F16C 33/30 (2006.01), C21D 9/40 (2006.01)
Applicants: NIPPON STEEL & SUMITOMO METAL CORPORATION [JP/JP]; 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071 (JP)
Inventors: HASHIMURA Masayuki; (JP).
MIYAZAKI Masafumi; (JP).
YAMAMURA Hideaki; (JP).
SUZUKI Takahisa; (JP).
FUJITA Takashi; (JP)
Agent: SHIGA Masatake; 1-9-2, Marunouchi, Chiyoda-ku, Tokyo 1006620 (JP)
Priority Data:
2011-230832 20.10.2011 JP
Title (EN) BEARING STEEL AND METHOD FOR PRODUCING SAME
(FR) ACIER À COUSSINETS ET SON PROCÉDÉ DE FABRICATION
(JA) 軸受鋼とその製造方法
Abstract: front page image
(EN)The present invention is bearing steel, wherein the metal composition comprises, as inclusions, compound oxysulfides containing rare earth metals, Ca, O, S, and Al; TiN; MnS; Al2O3; and compound oxides containing Al and Ca; the number of compound oxysulfide inclusions per the total number of inclusions is 50% or greater, but less than 100%; the number of compound oxysulfide inclusions having a major axis of 5 µm or larger is between 0.001 and 2 per 1 mm2 of observed surface; and the number of TiN inclusions having a major axis of 5 µm or greater present independent of the compound oxysulfide inclusions is 0.001 or greater, but less than 1.0 per 1 mm2 of observed surface.
(FR)La présente invention concerne un acier à coussinets, la composition métallique comprenant, comme inclusions, des oxysulfures composites contenant des métaux des terres rares, Ca, O, S et Al ; TiN ; MnS ; Al2O3 ; et des oxydes composites contenant Al et Ca ; le nombre d'inclusions d'oxysulfures composites pour le nombre total d'inclusions étant de 50 % ou plus, mais moins de 100 % ; le nombre d'inclusions d'oxysulfures composites ayant un axe majeur de 5 µm ou plus grand étant entre 0,001 et 2 pour 1 mm2 de surface observée ; et le nombre d'inclusions de TiN ayant un axe majeur de 5 µm ou plus présentes indépendant des inclusions d'oxysulfures composites étant de 0,001 ou plus, mais de moins de 1,0 pour 1 mm2 de surface observée.
(JA) 軸受鋼であって、金属組織が、介在物として、Rare Earth Metal、Ca、O、S及びAlを含む複合酸硫化物と、TiNと、MnSと、Alと、Al及びCaを含む複合酸化物と、を含有し、前記介在物の合計個数に対して、前記複合酸硫化物の個数が、50%以上100%未満であり、かつ、長径が5μm以上である前記複合酸硫化物の個数が、観察面1mmあたり、0.001個以上2個以下であり、前記複合酸硫化物と独立に存在する長径が5μm以上である前記TiNの個数が、観察面1mmあたり、0.001個以上1.0個未満である。
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, 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, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, 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, 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, ML, MR, NE, SN, TD, TG).
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)