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1. (WO2012146254) METHOD FOR SOLUTION HARDENING OF A COLD DEFORMED WORKPIECE OF A PASSIVE ALLOY, AND A MEMBER SOLUTION HARDENED BY THE METHOD
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2012/146254 International Application No.: PCT/DK2012/050139
Publication Date: 01.11.2012 International Filing Date: 27.04.2012
Chapter 2 Demand Filed: 27.11.2012
IPC:
C23C 8/26 (2006.01) ,C23C 8/34 (2006.01)
C CHEMISTRY; METALLURGY
23
COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
C
COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
8
Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
06
using gases
08
only one element being applied
24
Nitriding
26
of ferrous surfaces
C CHEMISTRY; METALLURGY
23
COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
C
COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
8
Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
06
using gases
34
more than one element being applied in more than one step
Applicants:
CHRISTIANSEN, Thomas Lundin [DK/DK]; DK (UsOnly)
HUMMELSHOJ, Thomas Strabo [DK/DK]; DK (UsOnly)
SOMERS, Marcel A.J. [NL/DK]; DK (UsOnly)
EXPANITE A/S [DK/DK]; Industrivænget 34 DK-3400 Hillerød, DK (AllExceptUS)
Inventors:
CHRISTIANSEN, Thomas Lundin; DK
HUMMELSHOJ, Thomas Strabo; DK
SOMERS, Marcel A.J.; DK
Agent:
HEEBØLL-NIELSEN, Anders; Awapatent A/S Rigensgade 11 DK-1316 København K, DK
Priority Data:
PA 2011 7020828.04.2011DK
Title (EN) METHOD FOR SOLUTION HARDENING OF A COLD DEFORMED WORKPIECE OF A PASSIVE ALLOY, AND A MEMBER SOLUTION HARDENED BY THE METHOD
(FR) PROCÉDÉ DE DURCISSEMENT EN SOLUTION D'UNE PIÈCE DE FABRICATION EN ALLIAGE PASSIF DÉFORMÉE À FROID, ET ÉLÉMENT DURCI EN SOLUTION PAR LEDIT PROCÉDÉ
Abstract:
(EN) The invention relates to a method for method for formation of expanded austenite and/or expanded martensite by solution hardening of a cold deformed workpiece of a passive alloy, which method comprises a first step of dissolving at least nitrogen in the workpiece at a temperature T1, which is higher than the solubility temperature for carbide and/or nitride and lower than the melting point of the passive alloy, and a subsequent second step of dissolving nitrogen and/or carbon in the work piece at a temperature T2, which is lower than the temperature at which carbides and/or nitrides form in the passive alloy. The invention further relates to a member, such as a lock washer for securing bolts or nuts prepared using the method.
(FR) L'invention concerne un procédé de formation d'austénite dilatée et/ou de martensite dilatée par durcissement en solution d'une pièce de fabrication en alliage passif déformée à froid. Ledit procédé comprend une première étape consistant à dissoudre au moins de l'azote dans la pièce de fabrication à une température T1 qui est supérieure à la température de solubilité des carbures et/ou des nitrures et inférieure au point de fusion de l'alliage passif, et une deuxième étape consécutive consistant à dissoudre de l'azote et/ou du carbone dans la pièce de fabrication à une température T2 qui est inférieure à la température à laquelle des carbures et/ou des nitrures se forment dans l'alliage passif. L'invention concerne également un élément tel qu'une rondelle frein pour fixer des boulons ou des écrous préparé en utilisant ledit procédé.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, 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, 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 (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (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: English (EN)
Filing Language: English (EN)