WO2008083033A3 - Procédé de cémentation exempte d'oxygène dans des fours à pression atmosphérique - Google Patents

Procédé de cémentation exempte d'oxygène dans des fours à pression atmosphérique Download PDF

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Publication number
WO2008083033A3
WO2008083033A3 PCT/US2007/088358 US2007088358W WO2008083033A3 WO 2008083033 A3 WO2008083033 A3 WO 2008083033A3 US 2007088358 W US2007088358 W US 2007088358W WO 2008083033 A3 WO2008083033 A3 WO 2008083033A3
Authority
WO
WIPO (PCT)
Prior art keywords
percent
oxygen
concentrations
gas
varies
Prior art date
Application number
PCT/US2007/088358
Other languages
English (en)
Other versions
WO2008083033A2 (fr
Inventor
Karen Anne Connery
Richard A Novak
Simon Ho
Amitabh Gupta
Wilde Robert Marcel De
Original Assignee
Praxair Technology Inc
Karen Anne Connery
Richard A Novak
Simon Ho
Amitabh Gupta
Wilde Robert Marcel De
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US11/645,447 external-priority patent/US20080149227A1/en
Application filed by Praxair Technology Inc, Karen Anne Connery, Richard A Novak, Simon Ho, Amitabh Gupta, Wilde Robert Marcel De filed Critical Praxair Technology Inc
Priority to EP07855297A priority Critical patent/EP1966396A2/fr
Publication of WO2008083033A2 publication Critical patent/WO2008083033A2/fr
Publication of WO2008083033A3 publication Critical patent/WO2008083033A3/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—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
    • C23C—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
    • C23C8/00—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
    • C23C8/06—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 using gases
    • C23C8/08—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 using gases only one element being applied
    • C23C8/20—Carburising
    • C23C8/22—Carburising of ferrous surfaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/76—Adjusting the composition of the atmosphere
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/663—Bell-type furnaces
    • C21D9/667—Multi-station furnaces
    • C21D9/67—Multi-station furnaces adapted for treating the charge in vacuum or special atmosphere
    • C—CHEMISTRY; METALLURGY
    • C23—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
    • C23C—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
    • C23C8/00—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
    • C23C8/06—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 using gases
    • C23C8/28—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 using gases more than one element being applied in one step
    • C23C8/30—Carbo-nitriding
    • C23C8/32—Carbo-nitriding of ferrous surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B17/00—Furnaces of a kind not covered by any preceding group
    • F27B17/0016—Chamber type furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/04—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated adapted for treating the charge in vacuum or special atmosphere
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
    • F27D7/02—Supplying steam, vapour, gases, or liquids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
    • F27D7/06—Forming or maintaining special atmospheres or vacuum within heating chambers

Abstract

L'invention concerne un procédé destiné au traitement thermique exempt d'oxygène d'une pièce d'acier dans un four à pression atmosphérique. Le présent procédé de traitement par lots utilise une atmosphère gazeuse contrôlée exempte d'oxygène renfermant 1,0 à 10,0% environ d'un gaz hydrogène, 0,1 à 10,0% environ d'un gaz d'hydrocarbures, tel que du propylène, cette concentration variant en fonction du temps, le reste de l'atmosphère gazeuse étant constitué d'azote. Le présent procédé de traitement au four continu utilise une pluralité de zones, chaque zone comprenant une atmosphère gazeuse contrôlée exempte d'oxygène renfermant 0,1 à 10,0% environ d'un gaz hydrogène, cette concentration variant à travers les différentes zones, 0,1 à 10,0% environ d'un gaz d'hydrocarbures, tel que propylène, cette concentration variant à travers les différentes zones, le reste de l'atmosphère gazeuse étant constitué d'azote. Les présents procédés de traitement thermique exempt d'oxygène, de préférence des procédés de cémentation, utilisent une atmosphère contrôlée de manière précise pour réduire à un minimum l'oxydation intergranulaire, éliminer la formation de suie et de cémentite ou d'autres carbures métalliques et éviter la fragilisation par l'hydrogène.
PCT/US2007/088358 2006-12-26 2007-12-20 Procédé de cémentation exempte d'oxygène dans des fours à pression atmosphérique WO2008083033A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07855297A EP1966396A2 (fr) 2006-12-26 2007-12-20 Procédé de cémentation exempte d'oxygène dans des fours à pression atmosphérique

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US11/645,447 2006-12-26
US11/645,447 US20080149227A1 (en) 2006-12-26 2006-12-26 Method for oxygen free carburization in atmospheric pressure furnaces
US95982507A 2007-12-19 2007-12-19
US11/959,825 2007-12-19

Publications (2)

Publication Number Publication Date
WO2008083033A2 WO2008083033A2 (fr) 2008-07-10
WO2008083033A3 true WO2008083033A3 (fr) 2008-10-09

Family

ID=39262708

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/088358 WO2008083033A2 (fr) 2006-12-26 2007-12-20 Procédé de cémentation exempte d'oxygène dans des fours à pression atmosphérique

Country Status (2)

Country Link
EP (1) EP1966396A2 (fr)
WO (1) WO2008083033A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUB20154708A1 (it) * 2015-10-16 2017-04-16 Franco Mancia Procedimento termico per il recupero di acciaio in filo da pneumatici in atmosfera controllata
CN113106225B (zh) * 2021-03-31 2023-03-21 北京首钢股份有限公司 一种减小高碳工具钢晶间氧化深度的方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4035203A (en) * 1973-12-21 1977-07-12 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method for the heat-treatment of steel and for the control of said treatment

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4035203A (en) * 1973-12-21 1977-07-12 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method for the heat-treatment of steel and for the control of said treatment

Also Published As

Publication number Publication date
WO2008083033A2 (fr) 2008-07-10
EP1966396A2 (fr) 2008-09-10

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