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1. (WO2007003748) MARTENSITIC STAINLESS STEEL COMPOSITION, METHOD FOR MAKING A MECHANICAL PART FROM SAID STEEL AND RESULTING PART
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2007/003748    International Application No.:    PCT/FR2006/001472
Publication Date: 11.01.2007 International Filing Date: 26.06.2006
IPC:
C22C 38/44 (2006.01), C21D 1/25 (2006.01), C21D 6/00 (2006.01), C21D 6/04 (2006.01)
Applicants: AUBERT & DUVAL [FR/FR]; 33, avenue du Maine, F-75015 Paris (FR) (For All Designated States Except US).
MONTAGNON, Jacques [FR/FR]; (FR) (For US Only)
Inventors: MONTAGNON, Jacques; (FR)
Agent: NEYRET, Daniel; Cabinet Lavoix, 2, place d'Estienne d'Orves, F-75441 Paris Cedex 09 (FR)
Priority Data:
0506591 28.06.2005 FR
Title (EN) MARTENSITIC STAINLESS STEEL COMPOSITION, METHOD FOR MAKING A MECHANICAL PART FROM SAID STEEL AND RESULTING PART
(FR) COMPOSITION D'ACIER INOXYDABLE MARTENSITIQUE, PROCEDE DE FABRICATION D'UNE PIECE MECANIQUE A PARTIR DE CET ACIER ET PIECE AINSI OBTENUE
Abstract: front page image
(EN)The invention concerns martensitic stainless steel, characterized in that its composition in weight percentages is as follows: 9 % = Cr = 13 %; 1.5 % = Mo = 3 %; 8 % = Ni = 14 %; 1 % = Al = 2 %; 0.5 % = Ti = 1.5 % with AI + Ti = 2.25 %; traces = Co = 2 %; traces = W = 1 % with Mo + (W/2) = 3 %; traces = P = 0.02 %; traces = S = 0.0050 %; traces = N = 0.0060 %; traces = C = 0.025 %; traces = Cu = 0.5 %; traces = Mn = 3 %; traces = Si = 0.25 %; traces = O = 0.0050 %; and is such that: Ms (°C) = 1302 42 Cr 63 Ni 30 Mo + 20AI - 15W - 33Mn - 28Si - 30Cu - 13Co + 10 Ti = 50 Cr eq / Ni eq = 1 .05 with Cr eq (%) = Cr + 2Si + Mo + 1.5 Ti + 5.5 AI + 0.6W Ni eq (%) = 2Ni + 0.5 Mn + 3O C + 25 N + Co + 0.3 Cu. The invention also concerns a method for making a mechanical part using said steel, and the resulting part.
(FR)Acier inoxydable martensitique, caractérisé en ce que sa composition est, en pourcentages pondéraux : - 9% ≤ Cr ≤ 13% ; 1 ,5% ≤ Mo ≤ 3% ; 8% ≤ Ni ≤ 14% ; 1 % ≤ Al ≤ 2% ; 0,5% ≤ Ti ≤ 1 ,5% avec AI + Ti ≥ 2,25% ; traces ≤ Co ≤ 2% ; traces ≤ W ≤ 1 % avec Mo + (W/2) ≤ 3% ; traces ≤ P ≤ 0,02% ; traces ≤ S ≤ 0,0050% ; traces ≤ N ≤ 0,0060% ; traces ≤ C ≤ 0,025% ; traces ≤ Cu ≤ 0,5% ; traces ≤ Mn ≤ 3% ; traces ≤ Si ≤ 0,25% ; traces ≤ O ≤ 0,0050% ; et est telle que : • Ms (°C) = 1302 - 42Cr - 63Ni - 30Mo + 20AI - 15W - 33Mn - 28Si - 30Cu - 13Co + 10Ti ≥ 50 • Cr eq / Ni eq ≤ 1 ,05 avec Cr eq (%) = Cr + 2Si + Mo + 1,5Ti + 5,5AI + 0,6W Ni eq (%) = 2Ni + 0,5Mn + 3OC + 25N + Co + 0,3Cu. Procédé de fabrication d'une pièce mécanique utilisant cet acier, et pièce ainsi obtenue.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LV, LY, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, 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 (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: French (FR)
Filing Language: French (FR)