WO2013064335A1 - Procede de carbonitruration basse pression, a plage de temperature etendue dans une phase de nitruration initiale - Google Patents

Procede de carbonitruration basse pression, a plage de temperature etendue dans une phase de nitruration initiale Download PDF

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Publication number
WO2013064335A1
WO2013064335A1 PCT/EP2012/069888 EP2012069888W WO2013064335A1 WO 2013064335 A1 WO2013064335 A1 WO 2013064335A1 EP 2012069888 W EP2012069888 W EP 2012069888W WO 2013064335 A1 WO2013064335 A1 WO 2013064335A1
Authority
WO
WIPO (PCT)
Prior art keywords
temperature
phase
nitriding
pressure carbonitriding
low pressure
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/EP2012/069888
Other languages
English (en)
French (fr)
Inventor
Philippe Lapierre
Jérôme LARDINOIS
Yves Giraud
Alfred RALLO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ECM Technologies SAS
PSA Automobiles SA
Original Assignee
Peugeot Citroen Automobiles SA
ECM Technologies SAS
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
Application filed by Peugeot Citroen Automobiles SA, ECM Technologies SAS filed Critical Peugeot Citroen Automobiles SA
Priority to BR112014010314A priority Critical patent/BR112014010314A2/pt
Priority to KR1020147015029A priority patent/KR101945006B1/ko
Priority to JP2014539273A priority patent/JP6189849B2/ja
Priority to CN201280053989.1A priority patent/CN103946411B/zh
Priority to EP12772301.3A priority patent/EP2773788B1/fr
Priority to US14/354,418 priority patent/US9765422B2/en
Priority to MX2014005219A priority patent/MX359961B/es
Publication of WO2013064335A1 publication Critical patent/WO2013064335A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • C23C8/28—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
    • 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
    • C23C8/02—Pretreatment of the material to be coated
    • 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
    • C23C8/34—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 more than one step
    • 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
    • C23C8/80—After-treatment

Definitions

  • the present invention relates to a low-pressure carbonitriding process for steel parts, including, but not limited to, parts used in the manufacture of motor vehicles.
  • the invention also applies to parts used in the manufacture of agricultural machinery, machine tool, or parts in the aeronautical field.
  • a low pressure carbonitriding process of steel parts comprising alternating steps of carburizing and nitriding at a constant temperature, preceded by a temperature rise step comprising a single temperature rise phase followed by an initial nitriding phase with continued rise in temperature, and followed by a quenching step, wherein the initial nitriding phase is carried out from a temperature between 700 ° C and 750 ° C, and up to a temperature between 860 ° C and 1000 ° C.
  • the initial nitriding phase is immediately followed by a first step of cementation.
  • the total elimination of the temperature equalization phase makes it possible to lengthen the initial nitriding phase in an optimum temperature range for nitriding.
  • the temperature rise is performed with a reduced temperature gradient compared to the simple temperature rise phase.
  • the treatment time is further increased in an optimum temperature range for nitriding.
  • the method comprises a final nitriding step accompanied by a lowering temperature immediately before quenching.
  • the final nitriding step is also carried out in an optimum temperature range, so that the quality of the treatment is improved.
  • the method according to the invention comprises a first step of temperature rise comprising a first phase M of simple temperature rise, illustrated by a line in continuous line, from room temperature to at a point at a temperature of 700 ° C, denoted Ni 1 in the figure.
  • the simple temperature rise phase can be carried out up to a temperature of between 700 ° C. and 750 ° C., and has a duration of between 10 minutes and 90 minutes. that is to say that the simple temperature rise is carried out with a temperature gradient of between 8 ° C./min and 75 ° C./min.
  • the method then comprises an initial nitriding phase Ni with continuation of the temperature rise step to a temperature of 940 ° C in the example shown.
  • the temperature of 940 ° C corresponds to a compromise between a temperature of 860 ° C which allows a treatment of better quality and a temperature of 1000 ° C which allows for faster processing.
  • the rise in temperature continues on a regular basis but with a temperature gradient of between 3.5 ° C / min and 16 ° C / min less than the temperature gradient during the simple temperature rise.
  • the duration of the initial nitriding phase is between 15 minutes and 45 minutes, depending on the amount of nitrogen that it is desired to set in this initial step and the composition of the steel to be treated.
  • the initial nitriding phase comprises injection phases of a nitriding gas such as alternating ammonia with diffusion phases.
  • the rise in temperature continues with the same temperature gradient as during the single temperature rise to a point at a temperature comprised between between 750 ° C and 850 ° C, here 800 ° C, denoted Ni2 in the figure.
  • the temperature is then maintained in a step until a moment noted Ni3 in Figure 2 from which a high temperature rise is performed to reach the carburizing temperature.
  • the temperature of the bearing is chosen in a manner known per se to perform the initial nitriding phase under optimal conditions given the composition of the parts to be treated. Note in this connection that because of the bearing, the final temperature rise can be carried out very rapidly, for example 80 ° C / min at 100 ° C / min without subjecting the parts to unacceptable constraints.
  • the rise in temperature continues from the point Ni 1 with a lower temperature gradient than in the first mode. embodiment, preferably in a range of 2 ° C / min to 8 ° C / min, up to a moment noted Ni4, here corresponding to a temperature of 850 ° C, from which a high temperature rise is achieved to reach the carburising temperature, according to a gradient similar to that of the second embodiment.
  • the method then comprises n alternating carburizing phases with nitriding phases.
  • the carburizing and nitriding steps comprise alternating treatment gas injection phases with diffusion phases not shown in the figures.
  • the diagram has been interrupted between the nitriding step N1 and the last cementation step Cn.
  • the method comprises a final nitriding step Nn accompanied by a temperature drop immediately before the T quenching.
  • the temperature is lowered continuously to a temperature within the optimum temperature range for nitriding while remaining high enough to allow effective quenching.
  • the final temperature before quenching is 840 ° C.
  • satisfactory results are obtained for a final temperature before quenching between 900 ° C. and 800 ° C. It has been found that this limited descent of temperature decreases the stress on the parts during quenching.
  • the final nitriding step has a duration of preferably between 15 minutes and 60 minutes, which corresponds to a temperature gradient of between 10 ° C / min and 1 ° C / min.
  • the final nitriding step preferably comprises alternating nitriding gas injection phases with diffusion phases.
  • the temperature drop is first of all carried out in a strong manner, with a gradient as strong as possible without creating undue stresses in the steel, up to the optimum nitriding temperature for the steel being treated, noted Nn1 in the figure, here 840 ° C, then the temperature is maintained at a level until the beginning of the quench.
  • the method according to the invention can be implemented by combining any of the embodiments of the initial nitriding phase with any of the embodiments of the final nitriding phase, or even finish the treatment cycle so conventional, that is to say with a quench performed directly from the carburizing temperature.
  • the initial rise in temperature can be carried out according to a constant gradient as illustrated by a dashed line in the figure.
  • the nitriding phase has a shortened duration as illustrated by a mixed line in the figure. Due to the reduced temperature gradient during the initial nitriding phase, it has been experimented that the temperature of the workpieces has time to equalize so that it is possible to eliminate the equalization step provided in the aforementioned document. If this is necessary, for example because of a particular configuration of the parts to be treated, it may however provide a temperature equalization step of reduced duration between the initial nitriding phase and the first cementation step.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Heat Treatment Of Articles (AREA)
PCT/EP2012/069888 2011-10-31 2012-10-08 Procede de carbonitruration basse pression, a plage de temperature etendue dans une phase de nitruration initiale Ceased WO2013064335A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
BR112014010314A BR112014010314A2 (pt) 2011-10-31 2012-10-08 método de carbonituração com baixa pressão
KR1020147015029A KR101945006B1 (ko) 2011-10-31 2012-10-08 초기 질화 단계에서 확장된 온도 범위를 갖는 저압 침탄 질화 방법
JP2014539273A JP6189849B2 (ja) 2011-10-31 2012-10-08 初期窒化段階に広範な温度範囲が設けられている低圧浸炭窒化方法
CN201280053989.1A CN103946411B (zh) 2011-10-31 2012-10-08 在初始渗氮阶段上在扩展的温度范围内的低压碳氮共渗方法
EP12772301.3A EP2773788B1 (fr) 2011-10-31 2012-10-08 Procede de carbonitruration basse pression, a plage de temperature etendue dans une phase de nitruration initiale
US14/354,418 US9765422B2 (en) 2011-10-31 2012-10-08 Method for low-pressure carbonitriding having an extended temperature range in an initial nitridation phase
MX2014005219A MX359961B (es) 2011-10-31 2012-10-08 Método para carbonitruración a baja presión que tiene un intervalo de temperatura extendido en una fase de nitruración inicial.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1159875 2011-10-31
FR1159875A FR2981947B1 (fr) 2011-10-31 2011-10-31 Procede de carbonitruration basse pression, a plage de temperature etendue dans une phase de nitruration initiale

Publications (1)

Publication Number Publication Date
WO2013064335A1 true WO2013064335A1 (fr) 2013-05-10

Family

ID=47018193

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/069888 Ceased WO2013064335A1 (fr) 2011-10-31 2012-10-08 Procede de carbonitruration basse pression, a plage de temperature etendue dans une phase de nitruration initiale

Country Status (9)

Country Link
US (1) US9765422B2 (enExample)
EP (1) EP2773788B1 (enExample)
JP (1) JP6189849B2 (enExample)
KR (1) KR101945006B1 (enExample)
CN (1) CN103946411B (enExample)
BR (1) BR112014010314A2 (enExample)
FR (1) FR2981947B1 (enExample)
MX (1) MX359961B (enExample)
WO (1) WO2013064335A1 (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014170566A1 (fr) * 2013-04-18 2014-10-23 Peugeot Citroën Automobiles SA Procede de traitement thermochimique comportant une unique phase de nitruration avant une cementation

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013006589A1 (de) * 2013-04-17 2014-10-23 Ald Vacuum Technologies Gmbh Verfahren und Vorrichtung für das thermochemische Härten von Werkstücken
FR3028530B1 (fr) * 2014-11-14 2020-10-23 Peugeot Citroen Automobiles Sa Procede et installation de carbonitruration de piece(s) en acier sous basse pression et haute temperature
CN105420663B (zh) * 2015-11-20 2018-07-10 贵州师范大学 一种钛合金碳氮复合渗的表面处理方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1159875A (fr) 1956-10-17 1958-07-03 Machal Projecteurs Appareil clignoteur
FR2777911A1 (fr) * 1998-04-28 1999-10-29 Aubert & Duval Sa Procede de carbonitruration a basse pression de pieces en alliage metallique
EP1885904A1 (fr) 2005-04-19 2008-02-13 Etudes Et Constructions Mecaniques Procede et four de carbonitruration a basse pression
DE102010028165A1 (de) * 2010-04-23 2011-10-27 Robert Bosch Gmbh Verfahren zur Carbonitrierung von metallischen Bauteilen

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
JPH02294461A (ja) * 1989-05-09 1990-12-05 Mazda Motor Corp 鋼部材の浸炭処理方法
DE4110114A1 (de) 1990-03-27 1991-10-02 Mazda Motor Vorrichtung zum waermebehandeln von stahlteilen
JP3960697B2 (ja) * 1998-12-10 2007-08-15 株式会社日本テクノ 浸炭および浸炭窒化処理方法
AU2002221138A1 (en) * 2001-12-13 2003-06-23 Koyo Thermo Systems Co., Ltd. Vacuum carbo-nitriding method
PL204747B1 (pl) * 2002-10-31 2010-02-26 Politechnika & Lstrok Odzka Sposób nawęglania wyrobów stalowych w podciśnieniu
JP2006002194A (ja) * 2004-06-16 2006-01-05 Nsk Ltd 軸の製造方法
JP4655528B2 (ja) * 2004-07-12 2011-03-23 日産自動車株式会社 高強度機械構造用部品の製造方法、および高強度機械構造用部品
JP5295813B2 (ja) * 2009-02-17 2013-09-18 Ｄｏｗａサーモテック株式会社 鉄族系合金の窒化処理方法
DE102009002985A1 (de) * 2009-05-11 2010-11-18 Robert Bosch Gmbh Verfahren zur Carbonitrierung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1159875A (fr) 1956-10-17 1958-07-03 Machal Projecteurs Appareil clignoteur
FR2777911A1 (fr) * 1998-04-28 1999-10-29 Aubert & Duval Sa Procede de carbonitruration a basse pression de pieces en alliage metallique
EP1885904A1 (fr) 2005-04-19 2008-02-13 Etudes Et Constructions Mecaniques Procede et four de carbonitruration a basse pression
EP1885904B1 (fr) * 2005-04-19 2009-12-09 Etudes Et Constructions Mecaniques Procede et four de carbonitruration a basse pression
DE102010028165A1 (de) * 2010-04-23 2011-10-27 Robert Bosch Gmbh Verfahren zur Carbonitrierung von metallischen Bauteilen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014170566A1 (fr) * 2013-04-18 2014-10-23 Peugeot Citroën Automobiles SA Procede de traitement thermochimique comportant une unique phase de nitruration avant une cementation
FR3004731A1 (fr) * 2013-04-18 2014-10-24 Peugeot Citroen Automobiles Sa Procede de traitement thermochimique comportant une unique phase de nitruration avant une cementation

Also Published As

Publication number Publication date
US20170241008A9 (en) 2017-08-24
MX2014005219A (es) 2015-03-09
KR20140101751A (ko) 2014-08-20
US20140238549A1 (en) 2014-08-28
JP2014532808A (ja) 2014-12-08
CN103946411B (zh) 2016-01-20
FR2981947A1 (fr) 2013-05-03
US9765422B2 (en) 2017-09-19
CN103946411A (zh) 2014-07-23
EP2773788A1 (fr) 2014-09-10
MX359961B (es) 2018-10-17
JP6189849B2 (ja) 2017-08-30
EP2773788B1 (fr) 2019-02-20
FR2981947B1 (fr) 2014-01-03
KR101945006B1 (ko) 2019-02-01
BR112014010314A2 (pt) 2017-05-02

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