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1. (WO2013111407) CASE HARDENING STEEL MATERIAL WITH LITTLE HEAT-TREATMENT STRAIN
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2013/111407    International Application No.:    PCT/JP2012/077871
Publication Date: 01.08.2013 International Filing Date: 29.10.2012
IPC:
C22C 38/06 (2006.01), C22C 38/60 (2006.01)
Applicants: NIPPON STEEL & SUMITOMO METAL CORPORATION [JP/JP]; 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071 (JP)
Inventors: ISOBE Kohichi; (JP).
DOE Masahiko; (JP)
Agent: SHIGA Masatake; 1-9-2, Marunouchi, Chiyoda-ku, Tokyo 1006620 (JP)
Priority Data:
2012-014474 26.01.2012 JP
Title (EN) CASE HARDENING STEEL MATERIAL WITH LITTLE HEAT-TREATMENT STRAIN
(FR) MATÉRIAU À BASE D'ACIER DE CÉMENTATION AYANT UNE FAIBLE DÉFORMATION DE TRAITEMENT THERMIQUE
(JA) 熱処理歪みの小さい肌焼鋼材
Abstract: front page image
(EN)This case hardening steel material has a composition that contains, in mass %, 0.05 to 0.45% of C, 0.01 to 1.0% of Si, more than 0 to 2.0% of Mn, 0.001 to 0.06% of Al, 0.002 to 0.03% of N, more than 0 to 0.1% of S and more than 0 to 0.05% of P with the balance being Fe and unavoidable impurities. In the case hardening steel material, the equi-axed crystal region satisfies the relationships (1) and (2), or the columnar crystal region satisfies the relationship (3). Re = (Ae/Ao) × 100 ≤ 30% (1) (Cmin, 1/Co) ≥ 0.95 (2) (Cmin, 2/Co) ≥ 0.95 (3)
(FR)Ce matériau à base d'acier de cémentaion a une composition qui comprend, en % massique, 0,05 à 0,45 % de C, 0,01 à 1,0 % de Si, plus de 0 à 2,0 % de Mn, 0,001 à 0,06 % d'Al, 0,002 à 0,03 % de N, plus de 0 à 0,1 % de S et plus de 0 à 0,05 % de P, le reste étant constitué de Fe et des impuretés inévitables. Dans le matériau à base d'acier de cémentation, la région cristalline équiaxe satisfait les relations (1) et (2), ou la région cristalline colonnaire satisfait la relation (3). Re = (Ae/Ao) × 100 ≤ 30 % (1) (Cmin, 1/Co) ≥ 0,95 (2) (Cmin, 2/Co) ≥ 0,95 (3)
(JA) この肌焼鋼材は、質量%で、C:0.05~0.45%、Si:0.01~1.0%、Mn:0超~2.0%、Al:0.001~0.06%、N:0.002~0.03%、S:0超~0.1%、P:0超~0.05%、及び残部:Fe及び不可避的不純物を含む成分組成を有し、等軸晶領域では、下記(1)式及び下記(2)式を満足する、又は、柱状晶領域では、下記(3)式を満足する。 Re=(Ae/Ao)×100≦30% (1)式 (Cmin,1/Co)≧0.95 (2)式 (Cmin,2/Co)≧0.95 (3)式
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)