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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)
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
18
containing chromium
40
with nickel
44
with molybdenum or tungsten
C CHEMISTRY; METALLURGY
21
METALLURGY OF IRON
D
MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
1
General methods or devices for heat treatment, e.g. annealing, hardening, quenching, tempering
18
Hardening; Quenching with or without subsequent tempering
25
Hardening, combined with annealing between 300 C and 600 C, i.e. heat refining ("Vergüten")
C CHEMISTRY; METALLURGY
21
METALLURGY OF IRON
D
MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
6
Heat treatment of ferrous alloys
C CHEMISTRY; METALLURGY
21
METALLURGY OF IRON
D
MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
6
Heat treatment of ferrous alloys
04
Hardening by cooling below 0 C
Applicants:
AUBERT & DUVAL [FR/FR]; 33, avenue du Maine F-75015 Paris, FR (AllExceptUS)
MONTAGNON, Jacques [FR/FR]; FR (UsOnly)
Inventors:
MONTAGNON, Jacques; FR
Agent:
NEYRET, Daniel ; Cabinet Lavoix 2, place d'Estienne d'Orves F-75441 Paris Cedex 09, FR
Priority Data:
050659128.06.2005FR
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:
(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 (ARIPO) (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)
Also published as:
EP1896624BRPI0613291-0JP2008546912ES2349785US20100139817RU0002415196
CN101248205CA2612718FR2887558DK1896624IN6021/CHENP/2007