EP2536864A1 - Method for carbonitriding at least one component in a treatment chamber - Google Patents
Method for carbonitriding at least one component in a treatment chamberInfo
- Publication number
- EP2536864A1 EP2536864A1 EP11700010A EP11700010A EP2536864A1 EP 2536864 A1 EP2536864 A1 EP 2536864A1 EP 11700010 A EP11700010 A EP 11700010A EP 11700010 A EP11700010 A EP 11700010A EP 2536864 A1 EP2536864 A1 EP 2536864A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- treatment chamber
- carbonitriding
- process gas
- nitrogen
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 145
- 238000005256 carbonitriding Methods 0.000 title claims abstract description 31
- 239000007789 gas Substances 0.000 claims abstract description 121
- 239000001257 hydrogen Substances 0.000 claims abstract description 46
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 46
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 37
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 96
- 229910052757 nitrogen Inorganic materials 0.000 claims description 48
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 34
- 229910052799 carbon Inorganic materials 0.000 claims description 34
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 13
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 239000011261 inert gas Substances 0.000 claims description 10
- 229910021529 ammonia Inorganic materials 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 5
- 238000010926 purge Methods 0.000 claims description 5
- RGSFGYAAUTVSQA-UHFFFAOYSA-N Cyclopentane Chemical compound C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 claims description 4
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims description 4
- QQONPFPTGQHPMA-UHFFFAOYSA-N Propene Chemical compound CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000011010 flushing procedure Methods 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 3
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims description 3
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 claims description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 2
- 239000005977 Ethylene Substances 0.000 claims description 2
- DMEGYFMYUHOHGS-UHFFFAOYSA-N heptamethylene Natural products C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 claims description 2
- 239000001294 propane Substances 0.000 claims description 2
- 239000004071 soot Substances 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 238000005121 nitriding Methods 0.000 description 20
- 238000005255 carburizing Methods 0.000 description 13
- 150000002431 hydrogen Chemical class 0.000 description 10
- 238000009792 diffusion process Methods 0.000 description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 6
- 238000004886 process control Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 150000002825 nitriles Chemical class 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000002925 chemical effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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
-
- 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
- C23C8/06—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
Definitions
- the invention relates to a method according to the preamble of claim 1, and a treatment chamber and a control and / or regulating device according to the independent claims.
- the process control in carbonitriding takes place in at least one
- Treatment chamber by presetting pressure, temperature, time,
- Carbonitriding can be a by-product of the carbon and Nitrogen donor gases form molecular hydrogen.
- Hydrogen content can be determined by suitable sensors.
- the sensors used must be suitable for use in low-pressure or
- PNH3 pressure of ammonia
- Nitrogen uptake constantly changes, which can be set at constant hold the nitriding index no consistent, reproducible carburizing and nitriding.
- the progress of the gas decomposition or the onset of reactions takes place as a function of pressure, temperature and reactive or catalytically acting surface of the component batch or
- Treatment chamber is thus the residence time of the gases in the chamber resulting from the flow rate. For this reason, in practice through complex test series
- DE 101 18 494 C2 describes in one embodiment, a low-pressure carbonitriding with amounts of solid gas.
- the inventive method has the advantage of being able to perform a uniform, reproducible carbonitriding by means of low-pressure carbonitriding regardless of a batch size or a furnace installation on at least one component located in the treatment chamber by means of a detection of a hydrogen content in a treatment chamber.
- Nitrogen donor gas supply adjusted or regulated. This is based on the consideration that regardless of the structure of the component charge and / or the treatment chamber by means of the measured variable of the hydrogen content can be concluded on a carbon or nitrogen donor gas supply in the process gas atmosphere, so that building on the
- Treatment chamber inflowing amount of the process gas in terms
- the carbon or nitrogen uptake changes during the process time due to the already taken up carbon or nitrogen and because of the limited solubility of both elements in the metallic matrix of the surfaces of the components.
- Nitrogen supply can be avoided, making it as efficient as possible
- Argon rinsed to a simultaneous presence for example of To avoid carbon and nitrogen donor gas. This can prevent unwanted chemical reactions, such as the formation of cyanides.
- the hydrogen content in the atmosphere of the treatment chamber detected during the process gas change can also be indirectly used as a measure of the proportions of the carbon or nitrogen donor gases. Will be at a
- the process gas exchange is purged with an inert gas, it can be assumed that hydrogen concentrations of less than 5% by volume, desirably less than 1% by volume, mean that the concentrations of the carbon donor or nitrogen donor gases are sufficiently low to sufficiently reduce or avoid environmental damage. If the treatment chamber is evacuated in a process gas exchange, it is necessary a pressure in the processing chamber of at least less than 1 x10 "1 mbar, desirably less than 1 x10" to fall below 2 mbar, which can be assumed that the
- Concentration of the carbon or nitrogen donor gases are sufficiently low in order to reduce or avoid environmental damage sufficiently.
- the method is particularly easy to use when controlling a flow rate of the introduced into the treatment chamber process gas. For example, by an adjustable valve at an inlet of the
- Treatment chamber the amount of the introduced process gas controlled and / or regulated.
- the method provides that the process gas comprises a carbon donor gas.
- This provides a first gas or a first gas composition for a process phase for the carbonitriding of components, with which the carbon fraction important for the carbonitriding is directly influenced, which allows a fast and precise control.
- the carbon donor gas is a compound selected from a group consisting of acetylene, ethylene, propane, propene,
- the process gas comprises a nitrogen donor gas.
- the nitrogen donor gas is a compound selected from a group consisting of ammonia, nitrogen or
- the method works particularly advantageous if at least two chemically different process gases act on the one component chemically in succession, and that between the gaseous process phases
- Treatment chamber is at least partially evacuated.
- Process phases successively act on the at least one component - for example, a carbon donor gas and a nitrogen donor gas - each specific chemical effects can be achieved with respect to the process. It makes sense not to mix these gas compositions when changing the process phases. By means of the at least partial evacuation of the treatment chamber, this can be achieved in a simple manner.
- Process gases sequentially act on the component chemically, and that between the gaseous process phases, the treatment chamber is purged with an inert gas.
- the change between two gaseous process phases can take place, whereby the pressure existing in the treatment chamber can essentially remain unchanged.
- the method according to the invention makes it possible for the purging or the evacuation to be ended when the detected hydrogen content or the total pressure of the atmosphere falls below a predetermined threshold value.
- the detection of the hydrogen content can also be used between the process phases to the effect of the evacuation or the
- Treatment chamber itself, a radiator located therein, the atmosphere and / or the supplied process gas to be heated or heated.
- Figure 1 is a schematic representation of a treatment chamber for
- FIG. 2 shows a time diagram of a low-pressure carbonitriding process with a representation of process phases and process temperatures
- FIG. 1 shows a schematic representation of a system 10 for low-pressure carbonitriding of metallic components 12, which are arranged on a support 14 in a treatment chamber 16.
- the components 12 can be heated by means of a heater 18 located in the lower area of the drawing.
- a first inlet 20 and a second inlet 22 with associated flow control valves 24 and 26 allow introduction of carbon donor gas 28 and nitrogen donor gas 30.
- a temperature sensor 32, a pressure sensor 34, and a low pressure carbonitride suitable hydrogen sensor 36 are shown in the drawing at the top of FIG.
- Treatment chamber 16 is arranged.
- a control and / or regulating device 38 shown above assumes, among other things, that of the
- Hydrogen sensor 36 detected hydrogen content 44 regulated.
- FIG. 2 shows a time diagram of a process control of a low-pressure carbonitriding, which is used, for example, in the plant 10 shown in FIG.
- the time t is plotted on the abscissa of the diagram and the temperature T of the atmosphere 46 is plotted on the ordinate.
- a curve 48 shows the time profile of the temperature T.
- Carbonitriding involves a heating phase A, a
- Temperature equalization phase B three nitriding phases C1, C2 and C3, three carburizing phases D1, D2 and D3, four process gas change phases E1, E2, E3 and E4, and a diffusion phase F and a cooling phase G.
- Two interruptions 50 indicate that the process phases shown do not each drawn durations must have, but can also deviate arbitrarily from the representation of Figure 2.
- Reference numerals E1 to E4 process gas exchange phases shown is that the detected hydrogen content 44 during the process gas exchange phases E1 to E4 for monitoring and thus reducing or avoiding unwanted reaction products, such as cyanides, is used, with no process gas is supplied and no process gas exchange takes place.
- the process or method can be interrupted to a Reduce or eliminate environmental hazards.
- the hydrogen content 44 is detected by the hydrogen sensor 36 and used for process control throughout the illustrated period of Figure 2.
- FIG. 2 shows that, during the heating phase A, the temperature T is increased continuously up to a treatment temperature of about 950 ° C. with an approximately constant heating rate.
- the temperature T is in an optimum range of 750 ° C to 1050 ° C for the present application.
- Temperature equalization phase B the treatment temperature is kept constant at about 950 ° C. During the heating phase A and the temperature equalizing phase B, neither a nitrogen donor gas 30 nor a carbon donor gas 28 is supplied.
- a nitrogen donor gas 30 for example
- Ammonia fed with a nitrogen donor gas partial pressure of about 50 mbar. This can be seen on the right vertical axis of the diagram of Figure 2.
- a first process gas change E1 in which the treatment chamber 16 is evacuated or filled with an inert gas, e.g.
- the total pressure of the treatment chamber 16 or the detected hydrogen fraction 44 is used to monitor the remaining portion of the nitrogen donor gas 30 from the nitriding C1 phase to environmentally hazardous
- Process gas exchange phase E1 evacuated and the total pressure of
- Treatment chamber 16 is less than 1 x 10 "1 mbar, ideally less than 1 x 10 " 2 mbar, the carburization phase D1 can begin. Otherwise, a
- the first process gas change E1 is followed by a carburizing phase D1 with a partial pressure of the carbon donor gas 28 of about 10 mbar.
- Treatment chamber 16 evacuated or alternatively with an inert gas, e.g.
- treatment temperature 950 ° C is no longer maintained and carried out a rapid cooling in the cooling phase G to room temperature to adjust the desired structural composition of the metallic components 12.
- Threshold 45 for the hydrogen content 44 After the carburizing phase D and before the nitriding phase C, a process gas exchange phase E takes place.
- carbon donor gas 28 is introduced into the treatment chamber 16. Due to the decay of the
- Flow control valve 24 is set or regulated. This is shown in FIG. 3 by an arrow 51.
- a region 55 for the hydrogen portion 44 provided in FIG. 3 extends between 60% by volume and 70% by volume.
- nitrogen donor gas 30 is introduced into the
- the treatment chamber 16 is either evacuated or rinsed with a suitable inert gas.
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)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010001936A DE102010001936A1 (en) | 2010-02-15 | 2010-02-15 | Process for carbonitriding at least one component in a treatment chamber |
PCT/EP2011/050025 WO2011098306A1 (en) | 2010-02-15 | 2011-01-03 | Method for carbonitriding at least one component in a treatment chamber |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2536864A1 true EP2536864A1 (en) | 2012-12-26 |
EP2536864B1 EP2536864B1 (en) | 2017-03-15 |
Family
ID=43533446
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11700010.9A Active EP2536864B1 (en) | 2010-02-15 | 2011-01-03 | Method for carbonitriding at least one component in a treatment chamber |
Country Status (6)
Country | Link |
---|---|
US (1) | US9399811B2 (en) |
EP (1) | EP2536864B1 (en) |
CN (1) | CN102762760B (en) |
BR (1) | BR112012020154A2 (en) |
DE (1) | DE102010001936A1 (en) |
WO (1) | WO2011098306A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012212918A1 (en) * | 2012-07-24 | 2014-01-30 | Karlsruher Institut für Technologie | Method for producing at least one component and control and / or regulating device |
FR3029938B1 (en) * | 2014-12-11 | 2019-04-26 | Ecm Technologies | LOW PRESSURE CARBONITRUTING PROCESS AND FURNACE |
CN105420663B (en) * | 2015-11-20 | 2018-07-10 | 贵州师范大学 | A kind of surface treatment method of titanium alloy compound carbonitriding |
AT524143B1 (en) | 2020-09-10 | 2022-12-15 | Miba Sinter Austria Gmbh | Process for hardening a sintered component |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3937699A1 (en) * | 1989-11-13 | 1991-05-16 | Thaelmann Schwermaschbau Veb | Producing epsilon carbonitride coatings on ferrous components - by controlling gas mixt. compsn. with respect to nitriding and carburising indices required to produce predetermined coating compsn. |
KR930007148B1 (en) * | 1990-03-27 | 1993-07-30 | 마쓰다 가부시끼가이샤 | Heat treating apparatus |
DE4211395B4 (en) * | 1992-04-04 | 2004-04-08 | Process-Electronic Analyse- und Regelgeräte GmbH | Process for nitrocarburizing or carbonitriding workpieces and furnace therefor |
DE19644051C2 (en) * | 1996-10-31 | 2000-09-28 | Moebius Hans Heinrich | Process and device for monitoring and determining the value of gas mixtures in nitrocarburizing and nitriding processes in hardening technology |
ATE199460T1 (en) * | 1997-10-07 | 2001-03-15 | Ipsen Int Gmbh | METHOD AND DEVICE FOR QUANTITATIVELY DETERMINING THE CONTENT OF PURE AND/OR BONDED HYDROGEN |
DE19909694A1 (en) | 1999-03-05 | 2000-09-14 | Stiftung Inst Fuer Werkstoffte | Production of carbonitrided edge layers in a low pressure carburization process comprises enriching the edge layers with nitrogen at the end of the process using molecular nitrogen as donor gas |
DE10003526A1 (en) * | 2000-01-27 | 2001-08-09 | Messer Griesheim Gmbh Frankfur | Process for the carbonitriding of high-carbon and high-alloy steels |
JP3531736B2 (en) * | 2001-01-19 | 2004-05-31 | オリエンタルエンヂニアリング株式会社 | Carburizing method and carburizing device |
DE10118494C2 (en) * | 2001-04-04 | 2003-12-11 | Aichelin Gesmbh Moedling | Process for low pressure carbonitriding of steel parts |
AU2002218508A1 (en) * | 2001-11-30 | 2003-06-17 | Koyo Thermo Systems Co., Ltd. | Method and apparatus for vacuum heat treatment |
CN1263887C (en) * | 2001-12-13 | 2006-07-12 | 光洋热***株式会社 | Vacuum carbo-nitriding method |
DE10322255B4 (en) | 2003-05-16 | 2013-07-11 | Ald Vacuum Technologies Ag | Process for high temperature carburizing of steel parts |
-
2010
- 2010-02-15 DE DE102010001936A patent/DE102010001936A1/en not_active Withdrawn
-
2011
- 2011-01-03 WO PCT/EP2011/050025 patent/WO2011098306A1/en active Application Filing
- 2011-01-03 EP EP11700010.9A patent/EP2536864B1/en active Active
- 2011-01-03 US US13/579,103 patent/US9399811B2/en active Active
- 2011-01-03 CN CN201180009610.2A patent/CN102762760B/en active Active
- 2011-01-03 BR BR112012020154-9A patent/BR112012020154A2/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO2011098306A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN102762760B (en) | 2015-12-02 |
EP2536864B1 (en) | 2017-03-15 |
US20130037173A1 (en) | 2013-02-14 |
DE102010001936A1 (en) | 2011-08-18 |
WO2011098306A1 (en) | 2011-08-18 |
US9399811B2 (en) | 2016-07-26 |
BR112012020154A2 (en) | 2020-11-03 |
CN102762760A (en) | 2012-10-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20120917 |
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