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 PDFInfo
- 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
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)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
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 |
KR1020147015029A KR101945006B1 (ko) | 2011-10-31 | 2012-10-08 | 초기 질화 단계에서 확장된 온도 범위를 갖는 저압 침탄 질화 방법 |
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 |
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 |
BR112014010314A BR112014010314A2 (pt) | 2011-10-31 | 2012-10-08 | método de carbonituração com baixa pressão |
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. |
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 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
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 |
FR1159875 | 2011-10-31 |
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 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 (fr) |
EP (1) | EP2773788B1 (fr) |
JP (1) | JP6189849B2 (fr) |
KR (1) | KR101945006B1 (fr) |
CN (1) | CN103946411B (fr) |
BR (1) | BR112014010314A2 (fr) |
FR (1) | FR2981947B1 (fr) |
MX (1) | MX359961B (fr) |
WO (1) | WO2013064335A1 (fr) |
Cited By (1)
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)
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)
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)
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 |
US5273585A (en) | 1990-03-27 | 1993-12-28 | Mazda Motor Corporation | Heat-treating apparatus |
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 |
JP3931276B2 (ja) * | 2001-12-13 | 2007-06-13 | 光洋サーモシステム株式会社 | 真空浸炭窒化方法 |
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 |
-
2011
- 2011-10-31 FR FR1159875A patent/FR2981947B1/fr not_active Expired - Fee Related
-
2012
- 2012-10-08 KR KR1020147015029A patent/KR101945006B1/ko active IP Right Grant
- 2012-10-08 BR BR112014010314A patent/BR112014010314A2/pt active Search and Examination
- 2012-10-08 EP EP12772301.3A patent/EP2773788B1/fr active Active
- 2012-10-08 WO PCT/EP2012/069888 patent/WO2013064335A1/fr active Application Filing
- 2012-10-08 CN CN201280053989.1A patent/CN103946411B/zh active Active
- 2012-10-08 US US14/354,418 patent/US9765422B2/en active Active
- 2012-10-08 MX MX2014005219A patent/MX359961B/es active IP Right Grant
- 2012-10-08 JP JP2014539273A patent/JP6189849B2/ja active Active
Patent Citations (5)
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)
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 |
---|---|
MX2014005219A (es) | 2015-03-09 |
US9765422B2 (en) | 2017-09-19 |
JP2014532808A (ja) | 2014-12-08 |
FR2981947B1 (fr) | 2014-01-03 |
US20170241008A9 (en) | 2017-08-24 |
EP2773788B1 (fr) | 2019-02-20 |
CN103946411A (zh) | 2014-07-23 |
BR112014010314A2 (pt) | 2017-05-02 |
US20140238549A1 (en) | 2014-08-28 |
MX359961B (es) | 2018-10-17 |
EP2773788A1 (fr) | 2014-09-10 |
KR101945006B1 (ko) | 2019-02-01 |
CN103946411B (zh) | 2016-01-20 |
KR20140101751A (ko) | 2014-08-20 |
FR2981947A1 (fr) | 2013-05-03 |
JP6189849B2 (ja) | 2017-08-30 |
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