[go: up one dir, main page]

EP1333105B1 - Procédé pour le traitement thermique d'articles métalliques et article traité thermiquement - Google Patents

Procédé pour le traitement thermique d'articles métalliques et article traité thermiquement Download PDF

Info

Publication number
EP1333105B1
EP1333105B1 EP02002530A EP02002530A EP1333105B1 EP 1333105 B1 EP1333105 B1 EP 1333105B1 EP 02002530 A EP02002530 A EP 02002530A EP 02002530 A EP02002530 A EP 02002530A EP 1333105 B1 EP1333105 B1 EP 1333105B1
Authority
EP
European Patent Office
Prior art keywords
phase
workpieces
temperature
during
cooling
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.)
Expired - Lifetime
Application number
EP02002530A
Other languages
German (de)
English (en)
Other versions
EP1333105A1 (fr
Inventor
Bernd Edenhofer
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.)
Ipsen International GmbH
Original Assignee
Ipsen International GmbH
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 Ipsen International GmbH filed Critical Ipsen International GmbH
Priority to DE50212014T priority Critical patent/DE50212014D1/de
Priority to EP02002530A priority patent/EP1333105B1/fr
Priority to AT02002530T priority patent/ATE391193T1/de
Priority to US10/328,555 priority patent/US7559995B2/en
Publication of EP1333105A1 publication Critical patent/EP1333105A1/fr
Priority to US11/339,032 priority patent/US20060119021A1/en
Priority to US11/339,033 priority patent/US20060118209A1/en
Application granted granted Critical
Publication of EP1333105B1 publication Critical patent/EP1333105B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • C21D9/0062—Heat-treating apparatus with a cooling or quenching zone
    • 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
    • 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
    • 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
    • F27B5/06—Details, accessories or equipment specially adapted for furnaces of these types
    • F27B5/12—Arrangement of devices for charging
    • 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
    • F27B5/06—Details, accessories or equipment specially adapted for furnaces of these types
    • F27B5/13—Arrangement of devices for discharging

Definitions

  • the invention relates to a method for heat treatment of metallic workpieces, in particular for the combined carburizing, boriding and hardening of ferrous materials. It also relates to a workpiece heat-treated by the method.
  • thermochemical heat treatment For producing defined workpiece properties, such as high hardness or wear resistance, metallic workpieces are usually subjected to a thermochemical heat treatment.
  • the purpose of this heat treatment is to first carburize the surface layer of the workpieces, that is to enrich them with carbon, in order to give the workpieces a comparatively high degree of hardness by subsequent hardening due to the resulting changed material composition.
  • Heat treatment methods are also known in which the surface of the workpieces are coated with a layer which produces the required mechanical properties. For example, when boriding by in-diffusion of boron, a hard boride layer is produced on the surface of the workpieces, which leads to a high resistance to wear and corrosion of the workpieces.
  • the invention has for its object to provide a method for heat treatment of metallic workpieces, by means of which can be achieved in an efficient manner comparatively high strength, in particular time and fatigue strength, at the same time high wear resistance of the workpieces.
  • Such a method is based on the finding that the boration phase can be used to diffuse the enriched in the peripheral layer of the workpieces during the enrichment phase carbon in the interior of the workpieces.
  • Under carburization in the above-mentioned meaning is also a carbonitriding to understand, if in addition nitrogen is added to the gas atmosphere.
  • an efficient process procedure contributes to the fact that the temperature difference to be bridged during the first cooling phase immediately following the enrichment phase is generally low.
  • the second temperature required for boriding is not or only slightly lower than the first temperature necessary for the enrichment phase for most low-carbon iron materials, such as case steel C 15.
  • the second temperature may also be greater than the first temperature, so that the workpieces are not cool in this case but to heat.
  • the wear-resistant boride layer formed on the surface of the workpieces during the boration phase becomes more resilient by the final quenching of the workpieces. This is because the carburized and hardened structure of the workpieces present below the boride layer has a sufficiently high hardness of usually approximately 800 HV, which in this way forms a load-bearing substructure for the boride layer, which as a rule has a Vickers hardness of approximately 2,000. In contrast to, for example, a CVD method or PVD (Physical Vapor Deposition) method, the risk of the hard Boride layer peeling off under high dynamic loading is thus ruled out.
  • the process parameters dependent on the material properties of the workpieces to be treated can be taken from generally accessible databases, such as Calphad (Calculation of Phase Diagrams), for a specific material. Depending on the application, it may then be necessary to heat the workpieces to the second or third temperature during the first and / or second cooling phase
  • the workpieces during the heating phase it is advantageous to heat the workpieces during the heating phase to a suitable for carburizing or carbonitriding common iron materials suitable first temperature between 800 ° C and 1100 ° C. It is also advantageous to cool the workpieces during the first cooling phase to a second temperature between 800 ° C. and 950 ° C. in order to obtain a temperature which can be used for boriding the workpieces. It is also advantageous to cool the workpieces during the second cooling phase to a third temperature between 800 ° C. and 900 ° C. in order to achieve a hardening temperature corresponding to the respective material. Preferably, the workpieces are cooled to room temperature during the quenching phase so that they can be further processed immediately afterwards.
  • a particularly advantageous method procedure also results if the first time duration is between 60 minutes and 360 minutes and the second time duration is between 30 minutes and 360 minutes.
  • the first and second time periods are suitably chosen depending on the respective prevailing temperatures so that a boride layer with a thickness of 10 .mu.m to 100 .mu.m is formed and the marginal carbon content directly below the boride layer is between 0.6% by weight and 0.9% by weight of an insert depth between 0.2 mm and 2.0 mm.
  • a plasma ie a high-current glow discharge.
  • a plasma-activated process is associated with boriding, for example from H.-J. Hunger et al. in the article "Plasma-activated gas boronation with boron trifluoride", HTM 52 (1997) 1 , describe.
  • the support of a plasma usually takes place at reduced pressure and offers the advantage of a lower consumption of carbon or boron-donating agents compared to a purely thermal activation.
  • the gas atmosphere expediently contains boron trichloride (BCl 3 ) and / or boron trifluoride (BF 3 ) and / or diborane (B 2 H 6 ) during the boration phase.
  • boron trifluoride as boron donating agent has been found to be advantageous for plasma activated boriding.
  • boron with boron trifluoride does not undergo thermal activation, so that the boriding process is restricted to the workpieces located in the region of the cathode case, and boriding, for example, of the inner walls of a boriding chamber is avoided.
  • boron trifluoride is already gaseous at room temperature, so that an evaporator can be dispensed with in an economical manner.
  • the workpieces are quenched during the quenching phase at a third pressure, preferably a high pressure of more than 1013.25 mbar, in a reducing or neutral gas atmosphere or in a liquid quenching medium in order to ensure a sufficient cooling rate.
  • a third pressure preferably a high pressure of more than 1013.25 mbar
  • workpieces can then - as known from case hardening - be tempered at a temperature between 150 ° C and 200 ° C in a separate oven.
  • a particularly advantageous process control is also given when the workpieces of a low-carbon iron material, preferably a case hardening steel according to DIN 17 210, exist.
  • the inventive method is not limited to iron materials that already have a relatively high content of carbon initially, such as conventional tempering steels Ck 45, Ck 60 or 42 CrMo 4. Rather, it is possible in the process according to the invention, low-carbon ferrous materials, such as common Case steels Ck 10, C 15 or 20 MoCr 4 boron.
  • the enrichment phase upstream of the boration phase makes it possible to enrich the boundary layer of the workpieces with carbon which, after completion of the boration phase and thus the diffusion phase, leaves a carbon content in the boundary layer which is sufficient with respect to the required carburization.
  • both the first pressure and the second pressure are between 0.1 mbar and 30 mbar.
  • the pressure depends primarily on the prevailing temperature and the respective composition of the gas atmosphere.
  • the first pressure should be adjusted so that, on the one hand, a comparatively rapid carburizing of the surface layer of the workpieces is achieved and, on the other hand, a generally undesirable carbide or soot formation on the surface of the workpieces is avoided.
  • the first pressure and the second pressure need not be the same during the enrichment phase and the boration phase, nor necessarily constant. Instead, they can be selectively varied, for example pulsed, according to the desired treatment result.
  • a device which has at least one treatment chamber in which the heating phase, the enrichment phase, the first cooling phase, the boration phase, the second cooling phase and the quenching phase can be carried out one after the other.
  • such a device may be a single-chamber vacuum oven in which the above-described process steps are carried out successively and without transporting the batch.
  • a first preferred embodiment of such a device provides for two treatment chambers, the heating phase, the enrichment phase, the first cooling phase, the boration phase and the second cooling phase being carried out in the first treatment chamber and the quenching phase being carried out in the second treatment chamber.
  • a second preferred embodiment of such a device provides three treatment chambers, wherein in the first treatment chamber, the heating phase and the enrichment phase are carried out, wherein in the second treatment chamber, the first cooling phase, the boration phase and the second cooling phase are performed and in the third treatment chamber, the quenching phase is performed.
  • a third preferred embodiment of such a device provides four successive or parallel treatment chambers, wherein in the first treatment chamber, the heating phase is performed, wherein in the second chamber, the enrichment phase or the enrichment phase and the first cooling phase are performed, wherein in the third treatment chamber, the first Cooling phase, the boration phase and the second cooling phase or the boration phase and the second cooling phase are performed and wherein in the fourth treatment chamber, the quenching phase is performed.
  • a fourth preferred embodiment of such a device provides six treatment chambers arranged sequentially or in parallel, the first treatment chamber serving as a heating chamber for performing the heating phase, the second treatment chamber as an enrichment chamber for performing the enrichment phase, the third treatment chamber as a cooling chamber for performing the first cooling phase , the fourth treatment chamber as a boration chamber for performing the boration phase, the fifth treatment chamber as a cooling chamber for Performing the second cooling phase and the sixth treatment chamber are formed as a quenching chamber for performing the quenching phase.
  • the first treatment chamber serving as a heating chamber for performing the heating phase
  • the second treatment chamber as an enrichment chamber for performing the enrichment phase
  • the third treatment chamber as a cooling chamber for performing the first cooling phase
  • the fourth treatment chamber as a boration chamber for performing the boration phase
  • the fifth treatment chamber as a cooling chamber for Performing the second cooling phase and the sixth treatment chamber are formed as a quenching chamber for performing the quenching phase.
  • a workpiece which is made of a metallic material and heat-treated by the method according to the invention, the workpiece having an outer iron boride layer of 10 .mu.m to 100 .mu.m thickness and a case hardening layer underlying the iron boride layer having a hardness according to Vickers between 600 and 900 and a case depth between 0.2 mm and 2.0 mm, is provided.
  • Fig. 1 the diagram shown are on the abscissa the time t and on the ordinate the temperature ⁇ and the pressure p removed.
  • the basis of Fig. 1 illustrated heat treatment method is a duplex method in the aforementioned sense and is used for the combined carburizing, boriding and hardening of workpieces, which consist of a low-carbon iron material, such as C 15 insert steel, (material number 1.0401). The entire procedure can be subdivided into six phases A to F.
  • the heating phase A the workpieces to be treated are heated to a first temperature ⁇ 1 of about 1000 ° C.
  • the apparatus used for this purpose such as a heat treatment plant according to Fig. 5 is first evacuated after introduction of the workpieces and then heated to the temperature ⁇ 1 .
  • the workpieces may also be heated to the temperature ⁇ 1 in an inert or reducing gas atmosphere, such as nitrogen (N 2 ).
  • the workpieces After heating to the temperature ⁇ 1 , the workpieces are transported to a second treatment chamber, where they during the second phase immediately following the first phase, the enrichment phase B, for a first time period .DELTA.t 1 , depending on the required carburizing depth between 60 min and 360 min, are exposed to a hydrocarbon-containing gas atmosphere.
  • the height of the pressure p 1 prevailing during the enrichment phase B basically depends on the desired treatment result and the type of hydrocarbon used and in the present case is about 10 mbar.
  • the enrichment phase B may be plasma activated as needed.
  • the workpieces are conveyed to a third treatment chamber, where they are cooled from the temperature ⁇ 1 to a second temperature ⁇ 2 of about 900 ° C under vacuum during a first cooling phase C directly following the enrichment phase B ,
  • the workpieces in a mainly Nitrogen-containing and thus inert gas atmosphere are cooled to the temperature ⁇ 2 .
  • the workpieces are transported into a fourth treatment chamber and borated at a temperature ⁇ 2 and a second pressure p 2 of approximately 0.1 mbar for a second time period ⁇ t 2 in a gas atmosphere containing boron.
  • the carbon enriched in the peripheral layer of the workpieces during the enrichment phase B diffuses into the interior of the workpieces so that the boriding phase D simultaneously forms a diffusion phase for the carburization process.
  • the period of time ⁇ t 2 for this directly following the cooling phase C subsequent boration phase D is depending on the required treatment result between 30 min and 360 min.
  • the gas atmosphere during boronation phase D boron trichloride, boron trifluoride, diborane or more of the aforementioned substances. If necessary, the boration phase D can be plasma-activated. In this case, the use of boron trifluoride as boron donating agent is particularly suitable.
  • a second cooling phase E during which the workpieces are cooled in a fifth treatment chamber of the heat treatment plant from the temperature ⁇ 2 to a third temperature ⁇ 3 of about 800 ° C under vacuum or alternatively in an inert gas atmosphere .
  • the workpieces are held for about 15 minutes to 30 minutes at the third temperature ⁇ 3 , as in Fig. 1 can be seen.
  • the workpieces are quenched from the quenching temperature ⁇ 3 to a temperature of less than 150 ° C, for example room temperature.
  • the workpieces are transported for this purpose in a sixth treatment chamber and cooled at a high pressure p 3 of more than 1013.25 mbar in a reducing or neutral gas atmosphere.
  • the workpieces may also be quenched in a liquid quench medium.
  • FIG. 2 In the Fig. 2 to 6 different embodiments of a device are shown in which the method described above can be performed.
  • the device according to Fig. 2 is a single-chamber vacuum furnace 10, in which all process steps A to F are performed in one and the same treatment chamber 11.
  • the compiled to a batch 12 workpieces are quenched during the quenching phase F by gas.
  • FIG. 3 The device shown a two-chamber vacuum oven 20, which has a first treatment chamber 21 and a second treatment chamber 22. In the first treatment chamber 21, the process steps A to E are performed, whereas the second treatment chamber designed as a gas quenching chamber serves to quench the charge 12 during the quenching phase F. From the device according to Fig. 3 is different in Fig. 4 shown two-chamber vacuum oven 30 mainly characterized in that in a second treatment chamber 32 which is separated by a door 33 from the first treatment chamber 31, an oil bath 34 is provided in which the charge 12 is quenched during the quenching phase F.
  • the method steps A to E are analogous to the device according to Fig. 3 performed in the first treatment chamber 31.
  • a heat treatment plant 40 which is provided with six parallel treatment chambers 41 to 46.
  • the treatment chamber 41 serves as a flushing lock when the charge 12 enters the heat treatment system 40 and as a high pressure quenching chamber during the quenching phase F at the end of the treatment cycle.
  • the treatment chamber 42 is designed as a heating chamber, in which the charge 12 is heated to the first temperature ⁇ 1 during the heating phase A.
  • the charge 12 is carburized during the enrichment phase B.
  • the cooling of the charge 12 to the second temperature ⁇ 2 during the first cooling phase C takes place in the treatment chamber 44.
  • the boriding of the charge 12 during the boration phase D takes place in the treatment chamber 45, whereas for the cooling and equalization of the charge 12 to the third temperature ⁇ 3 during the second cooling phase E the treatment chamber 46 is provided.
  • a three-chamber vacuum oven 50 is in Fig. 6 to recognize.
  • the vacuum oven 50 has a rinsing lock 54, through which the charge 12 is introduced into the vacuum oven 50.
  • the treatment chamber 51 serves to heat to the first temperature ⁇ 1 during the heating phase A and to carburize the charge 12 during the enrichment phase B.
  • cooling to the second temperature ⁇ 2 during the first cooling phase C barks the charge 12 during the Bor michsphase D and the cooling and balancing of the charge 12 to the third temperature ⁇ 3 during the second cooling phase E instead.
  • the treatment chamber 53 is provided for a final gas quenching during the quenching phase F.
  • the workpieces treated by the method described above have an outer iron boride layer of 10 .mu.m to 100 .mu.m thickness and a case hardening layer below the iron boride layer having a Vickers hardness between 600 and 900 and a case hardening depth between 0.2 mm and 2.0 mm. They are characterized by a relatively high time and fatigue strength at the same time high wear resistance.
  • the reason for this is the combination of carburizing, boriding and hardening obtained by method steps A to F.
  • the directly sequential method steps A to F synergy effects, which take into account an efficient process management. Because the process can be carried out in a single cycle and in a single heat treatment plant without interruption, whereby significant economic advantages compared to the hitherto usual separate carburizing, cooling, boriding and curing are achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Thermal Sciences (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Control Of Heat Treatment Processes (AREA)

Claims (14)

  1. Procédé pour le traitement thermique de pièces métalliques, en particulier pour la carburation, la boruration et la trempe combinées de matériaux ferreux, comprenant les étapes suivantes :
    a) chauffage des pièces à une première température (ϑ1) sous vide ou sous une atmosphère neutre ou réductrice pendant une phase de montée en température (A);
    b) carburation des pièces à la première température (ϑ1) atteinte à la fin de la phase de montée en température (A) et sous une première pression (p1) pendant une première durée (Δt1) dans une atmosphère gazeuse hydrocarburée pendant une phase d'enrichissement (B) suivant immédiatement la phase de montée en température (A) ;
    c) refroidissement des pièces d'une première température (ϑ1) à une deuxième température (ϑ2) sous vide ou dans une atmosphère contenant principalement de l'azote pendant une première phase de refroidissement (C) suivant immédiatement la phase d'enrichissement (B) ;
    d) boruration des pièces à la deuxième température (ϑ2) atteinte à la fin de la première phase de refroidissement (C) et sous une deuxième pression (p2) pendant une deuxième durée (Δt2) dans une atmosphère gazeuse contenant du bore pendant une phase de boruration (D) suivant immédiatement la première phase de refroidissement (C) ;
    e) refroidissement des pièces de la deuxième température (ϑ2) à une troisième température (ϑ3) sous vide ou dans une atmosphère contenant principalement de l'azote pendant une deuxième phase de refroidissement (E) suivant immédiatement la phase de boruration (D) ; et
    f) trempe des pièces de la troisième température (ϑ3) à une température inférieure à 150°C pendant une phase de trempe (F) suivant la deuxième phase de refroidissement (E).
  2. Procédé selon la revendication 1, caractérisé en ce que pendant la phase de montée en température (A), les pièces sont chauffées à une première température (ϑ1) comprise entre 800°C et 1100°C.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que pendant la première phase de refroidissement (C), les pièces sont refroidies à une deuxième température (ϑ2) comprise entre 800°C et 950°C.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que pendant la deuxième phase de refroidissement (D), les pièces sont refroidies à une troisième température (ϑ3) comprise entre 800°C et 900°C.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que pendant la phase de trempe (F), les pièces sont refroidies à la température ambiante.
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que la première durée (Δt1) est comprise entre 60 minutes et 360 minutes.
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que la deuxième durée (Δt2) est comprise entre 30 minutes et 360 minutes.
  8. Procédé selon l'une des revendications 1 à 7, caractérisé en ce qu'il est prévu une assistance par un plasma pendant la phase d'enrichissement (B) et/ou pendant la phase de boruration (D).
  9. Procédé selon l'une des revendications 1 à 8, caractérisé en ce qu'il est prévu pendant la phase de boruration (D) une atmosphère contenant du trichlorure de bore et/ou du trifluorure de bore et/ou du diborane.
  10. Procédé selon l'une des revendications 1 à 9, caractérisé en ce que pendant la phase de trempe (F), les pièces sont trempées sous une troisième pression (p3), de préférence une haute pression dépassant 1013,25 mbar, dans une atmosphère gazeuse réductrice ou neutre ou dans un milieu de trempe liquide.
  11. Procédé selon l'une des revendications 1 à 10, caractérisé en ce que les pièces faites d'un matériau ferreux pauvre en carbone se composent de préférence d'un acier de cémentation selon DIN 17 210.
  12. Procédé selon l'une des revendications 1 à 11, caractérisé en ce que la première pression (p1) est comprise entre 0,1 mbar et 30 mbar.
  13. Procédé selon l'une des revendications 1 à 12, caractérisé en ce que la deuxième pression (p2) est comprise entre 0,1 mbar et 30 mbar.
  14. Pièce composée d'un matériau métallique et ayant subi un traitement thermique par le procédé selon l'une des revendications 1 à 13, caractérisée en ce qu'elle comporte une couche extérieure de borure de fer de 10 µm à 100 µm d'épaisseur et une couche cémentée sous-jacente à la couche de borure de fer, qui a une dureté Vickers comprise entre 600 et 900 et une profondeur de cémentation comprise entre 0,2 mm et 2,0 mm.
EP02002530A 2002-02-04 2002-02-04 Procédé pour le traitement thermique d'articles métalliques et article traité thermiquement Expired - Lifetime EP1333105B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE50212014T DE50212014D1 (de) 2002-02-04 2002-02-04 Verfahren zur Wärmebehandlung metallischer Werkstücke sowie wärmebehandeltes Werkstück
EP02002530A EP1333105B1 (fr) 2002-02-04 2002-02-04 Procédé pour le traitement thermique d'articles métalliques et article traité thermiquement
AT02002530T ATE391193T1 (de) 2002-02-04 2002-02-04 Verfahren zur wärmebehandlung metallischer werkstücke sowie wärmebehandeltes werkstück
US10/328,555 US7559995B2 (en) 2002-02-04 2002-12-23 Method for heat treatment of metal workpieces as well as a heat-treated workpiece
US11/339,032 US20060119021A1 (en) 2002-02-04 2006-01-25 Method and device for heat treatment of metal workpieces as well as a heat-treated workpiece
US11/339,033 US20060118209A1 (en) 2002-02-04 2006-01-25 Method and device for heat treatment of metal workpieces as well as a heat-treated workpiece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02002530A EP1333105B1 (fr) 2002-02-04 2002-02-04 Procédé pour le traitement thermique d'articles métalliques et article traité thermiquement

Publications (2)

Publication Number Publication Date
EP1333105A1 EP1333105A1 (fr) 2003-08-06
EP1333105B1 true EP1333105B1 (fr) 2008-04-02

Family

ID=8185420

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02002530A Expired - Lifetime EP1333105B1 (fr) 2002-02-04 2002-02-04 Procédé pour le traitement thermique d'articles métalliques et article traité thermiquement

Country Status (4)

Country Link
US (3) US7559995B2 (fr)
EP (1) EP1333105B1 (fr)
AT (1) ATE391193T1 (fr)
DE (1) DE50212014D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10488115B2 (en) 2015-03-04 2019-11-26 Ihi Corporation Multi-chamber heat treatment device
US10648050B2 (en) 2015-05-26 2020-05-12 Ihi Corporation Heat treatment apparatus

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8088328B2 (en) * 2008-06-13 2012-01-03 Jones William R Vacuum nitriding furnace
DE202008010215U1 (de) * 2008-07-31 2008-10-09 Ipsen International Gmbh Industrieofen wie Mehrkammer-Vakuumofen, insbesondere Zweikammer-Vakuumofen zur Wärmebehandlung von Chargen metallischer Werkstücke
DE102009041041B4 (de) 2009-09-10 2011-07-14 ALD Vacuum Technologies GmbH, 63450 Verfahren und Vorrichtung zum Härten von Werkstücken, sowie nach dem Verfahren gehärtete Werkstücke
US10196730B2 (en) 2009-09-10 2019-02-05 Ald Vacuum Technologies Gmbh Method and device for hardening workpieces, and workpieces hardened according to the method
JP6206159B2 (ja) * 2013-12-17 2017-10-04 三菱電機株式会社 半導体装置の製造方法
JP6452340B2 (ja) * 2014-06-30 2019-01-16 国立大学法人群馬大学 金属の硬化処理方法
US10494687B2 (en) 2015-02-04 2019-12-03 Sikorsky Aircraft Corporation Methods and processes of forming gears
US20170074589A1 (en) 2015-09-11 2017-03-16 Ipsen Inc. System and Method for Facilitating the Maintenance of an Industrial Furnace

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4930620B1 (fr) * 1970-09-02 1974-08-14
US4012238A (en) * 1973-08-10 1977-03-15 Hughes Tool Company Method of finishing a steel article having a boronized and carburized case
DE3322957C2 (de) * 1983-06-25 1985-05-15 Hauni-Werke Körber & Co KG, 2050 Hamburg Verfahren zum Härten der Oberfläche von Gegenständen aus Eisenwerkstoff
JPS62127459A (ja) * 1985-11-28 1987-06-09 Kawasaki Heavy Ind Ltd 鋼の浸炭処理方法
JPH02298251A (ja) * 1988-08-31 1990-12-10 Komatsu Ltd ホウ化処理した耐摩耗品及びその製造方法
JPH0826447B2 (ja) * 1989-07-06 1996-03-13 住友金属工業株式会社 曲げ疲労強度に優れた鋼製部品及びその製造法
US5225144A (en) * 1990-07-03 1993-07-06 Tokyo Heat Treating Company Gas-carburizing process and apparatus
JP3381812B2 (ja) * 1994-11-21 2003-03-04 日立金属株式会社 耐溶損性の優れた鋳造用金型または接溶湯部材
DE29505496U1 (de) * 1995-03-31 1995-06-01 Ipsen Industries International GmbH, 47533 Kleve Vorrichtung zur Wärmebehandlung metallischer Werkstücke unter Vakuum
EP1078996B1 (fr) * 1999-08-09 2004-02-11 ALSTOM (Switzerland) Ltd Procédé pour renforcer les joints de grains d'une composant en superalliage de nickel
EP1259772B1 (fr) * 2000-02-02 2009-11-11 BTU International, Inc. Systeme de four modulaire
JP3531736B2 (ja) * 2001-01-19 2004-05-31 オリエンタルエンヂニアリング株式会社 浸炭方法及び浸炭装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"ASM Handbook, Heat Treating, Vol. 4,", 2001, ASM INTERNATIONAL, USA *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10488115B2 (en) 2015-03-04 2019-11-26 Ihi Corporation Multi-chamber heat treatment device
DE112016000997B4 (de) * 2015-03-04 2024-02-15 Ihi Corp. Mehrkammer-Wärmebehandlungsvorrichtung
US10648050B2 (en) 2015-05-26 2020-05-12 Ihi Corporation Heat treatment apparatus

Also Published As

Publication number Publication date
DE50212014D1 (de) 2008-05-15
US20060118209A1 (en) 2006-06-08
US20060119021A1 (en) 2006-06-08
US20030145907A1 (en) 2003-08-07
EP1333105A1 (fr) 2003-08-06
ATE391193T1 (de) 2008-04-15
US7559995B2 (en) 2009-07-14

Similar Documents

Publication Publication Date Title
DE69719046T2 (de) Verfahren zur Herstellung einsatzgehärteter Lagerbestandteile aus rostfreiem Stahl
EP0735149B1 (fr) Dispositif pour le traitement thermique d'articles métalliques sous vide
EP2203575B1 (fr) Procédé de carburation de pièces, et son utilisation
EP1333105B1 (fr) Procédé pour le traitement thermique d'articles métalliques et article traité thermiquement
DE2417179B2 (de) Verfahren zum karburieren hochlegierter staehle
EP2430210A2 (fr) Procédé de carbonitruration
DE4139975C2 (de) Verfahren zur Behandlung von legierten Stählen und Refraktärmetallen und Anwendung des Verfahrens
EP0627019B1 (fr) Procede de traitement thermochimique-thermique d'aciers de cementation
EP0882811B1 (fr) Procédé de cémentation de pièces métalliques dans un four sous vide
DE19736514C1 (de) Verfahren zum gemeinsamen Oxidieren und Wärmebehandeln von Teilen
EP0662525A1 (fr) Procédé pour empêcher l'oxydation superficielle pendant la carburation des aciers
DE102006059050A1 (de) Verfahren zur Wärmebehandlung von Wälzlagerbauteilen aus durchgehärtetem, bainitischem Wälzlagerstahl
DE19909694A1 (de) Verfahren zum Varbonitrieren bei Unterdruckverfahren ohne Plasmaunterstützung
EP0812929B1 (fr) Procédé pour la nitruration et/ou carbonitruration de pièces métalliques
EP0545069B1 (fr) Procédé de traitement d'aciers et de métaux réfractaires
EP0779376B2 (fr) Carburation par plasma de pièces métalliques
WO1991000929A1 (fr) Procede de cementation d'elements de paliers a roulement en acier au nickel faiblement allie
DE2109997A1 (de) Verfahren zum metallischen Zemen tieren
EP1745158B1 (fr) Procede pour traiter une surface
DE10118029C1 (de) Verfahren zur thermochemischen Vorbehandlung von metallischen Werkstücken und Anwendung des Verfahrens
DE2018709C3 (de) Verfahren zur Verbesserung der Verschleißfestigkeit von Eisenwerkstoffen
DE10162339A1 (de) Verfahren zur Herstellung einer Oxidschicht auf Metallteilen
WO2014008983A1 (fr) Revêtements de dlc à résistance améliorée à la corrosion
DE3029339A1 (de) Verfahren und vorrichtung zur behandlung elektrisch leitenden materials durch glimmentladung
WO2017050464A1 (fr) Composant en acier bainitisé et procédé de sa fabrication

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: 20020802

AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

AKX Designation fees paid

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

17Q First examination report despatched

Effective date: 20070302

RTI1 Title (correction)

Free format text: PROCESS FOR HEAT TREATING METALLIC ARTICLES AND HEAT TREATED ARTICLE

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

Ref country code: CH

Ref legal event code: NV

Representative=s name: E. BLUM & CO. AG PATENT- UND MARKENANWAELTE VSP

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 50212014

Country of ref document: DE

Date of ref document: 20080515

Kind code of ref document: P

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080713

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080902

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080402

ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080402

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080702

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080402

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20090106

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090228

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080402

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080703

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090204

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080402

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20140218

Year of fee payment: 13

Ref country code: NL

Payment date: 20140218

Year of fee payment: 13

Ref country code: DE

Payment date: 20140219

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20140228

Year of fee payment: 13

Ref country code: BE

Payment date: 20140218

Year of fee payment: 13

Ref country code: AT

Payment date: 20140212

Year of fee payment: 13

Ref country code: FR

Payment date: 20140219

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20140218

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150228

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50212014

Country of ref document: DE

REG Reference to a national code

Ref country code: NL

Ref legal event code: V1

Effective date: 20150901

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150901

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 391193

Country of ref document: AT

Kind code of ref document: T

Effective date: 20150204

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20150204

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150228

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150228

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20151030

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150204

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150204

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150204

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150901

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150302