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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

Publication Number WO/2012/146254
Publication Date 01.11.2012
International Application No. PCT/DK2012/050139
International Filing Date 27.04.2012
Chapter 2 Demand Filed 27.11.2012
IPC
C23C 8/26 2006.01
CCHEMISTRY; METALLURGY
23COATING 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
CCOATING 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
8Solid 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
06using gases
08only one element being applied
24Nitriding
26of ferrous surfaces
C23C 8/34 2006.01
CCHEMISTRY; METALLURGY
23COATING 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
CCOATING 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
8Solid 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
06using gases
34more than one element being applied in more than one step
CPC
C21D 1/06
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING 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
1General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
06Surface hardening
C21D 6/00
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING 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
6Heat treatment of ferrous alloys
C21D 6/002
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING 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
6Heat treatment of ferrous alloys
002containing Cr
C21D 9/0068
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING 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
9Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
0068for particular articles not mentioned below
C23C 8/02
CCHEMISTRY; METALLURGY
23COATING 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
CCOATING 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
8Solid state diffusion of only non-metal elements into metallic material surfaces
02Pretreatment of the material to be coated
C23C 8/26
CCHEMISTRY; METALLURGY
23COATING 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
CCOATING 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
8Solid state diffusion of only non-metal elements into metallic material surfaces
06using gases
08only one element being applied
24Nitriding
26of ferrous surfaces
Applicants
  • EXPANITE A/S [DK]/[DK] (AllExceptUS)
  • CHRISTIANSEN, Thomas Lundin [DK]/[DK] (UsOnly)
  • HUMMELSHOJ, Thomas Strabo [DK]/[DK] (UsOnly)
  • SOMERS, Marcel A.J. [NL]/[DK] (UsOnly)
Inventors
  • CHRISTIANSEN, Thomas Lundin
  • HUMMELSHOJ, Thomas Strabo
  • SOMERS, Marcel A.J.
Agents
  • HEEBØLL-NIELSEN, Anders
Priority Data
PA 2011 7020828.04.2011DK
Publication Language English (EN)
Filing Language English (EN)
Designated States
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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