EP2685193B1 - Procédé et four à sole tournante destinés au traitement thermique de pièces à usiner - Google Patents

Procédé et four à sole tournante destinés au traitement thermique de pièces à usiner Download PDF

Info

Publication number
EP2685193B1
EP2685193B1 EP12175924.5A EP12175924A EP2685193B1 EP 2685193 B1 EP2685193 B1 EP 2685193B1 EP 12175924 A EP12175924 A EP 12175924A EP 2685193 B1 EP2685193 B1 EP 2685193B1
Authority
EP
European Patent Office
Prior art keywords
zone
workpieces
protective gas
carburizing
rotary hearth
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.)
Not-in-force
Application number
EP12175924.5A
Other languages
German (de)
English (en)
Other versions
EP2685193A1 (fr
Inventor
Salim Philipp Afraz
Hans Georg Dr. Bittner
Sven Günther
Bora Dr. Özkan
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.)
LOI Thermprocess GmbH
Original Assignee
LOI Thermprocess 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 LOI Thermprocess GmbH filed Critical LOI Thermprocess GmbH
Priority to EP12175924.5A priority Critical patent/EP2685193B1/fr
Priority to PL12175924T priority patent/PL2685193T3/pl
Priority to ES12175924.5T priority patent/ES2532581T3/es
Priority to CN201310242607.6A priority patent/CN103540943B/zh
Publication of EP2685193A1 publication Critical patent/EP2685193A1/fr
Application granted granted Critical
Publication of EP2685193B1 publication Critical patent/EP2685193B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • C21D9/0037—Rotary furnaces with vertical axis; Furnaces with rotating floor
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/16—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a circular or arcuate path
    • 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

Definitions

  • the invention is directed to a rotary hearth furnace ring-type for heat treatment of workpieces, in particular for gas carburizing metallic workpieces, comprising an outer and an inner wall defining a furnace chamber, the at least one carburizing zone, in which an enrichment of the workpieces with carbon under protective gas, and at least one of the at least one carburizing zone downstream treatment zone, wherein in the outer wall at least one closable opening for loading and / or unloading of the furnace chamber is provided with workpieces.
  • the invention relates to a method for heat treating workpieces in a rotary hearth furnace having a furnace chamber having at least one carburization zone and at least one treatment zone downstream of the at least one carburizing zone, wherein the workpieces within the at least one carburizing zone at a temperature above 900 ° C. be enriched with carbon under protective gas.
  • a rotary hearth furnace and a method of the type designated input are, for example, from DE 10 2007 038 991 A1 known.
  • This known rotary hearth furnace is used in particular for Gasaufkohlung metal workpieces and has several treatment zones, which include, for example, a heating zone, a carburizing zone and a diffusion zone.
  • Such a rotary hearth furnace is also from the WO 2005/050112 A2 known, wherein the furnace chamber is divided by means of vertically movable doors in several treatment zones.
  • the workpieces to be treated are taken out of the rotary hearth furnace and into a second furnace or cooling chamber for lowering the temperature within a non-flammable atmosphere (eg nitrogen or argon ), where The metallic workpieces are subsequently returned to the rotary hearth furnace for renewed austenitization.
  • a non-flammable atmosphere eg nitrogen or argon
  • Such systems with two ovens are from the US 3,582,055 and the DE 195 14 289 A1 known.
  • the austenitizing of the previously cooled workpieces could take place in another furnace.
  • the next step, followed by austenitization is usually oil bath or polymer quenching, more rarely inert gas cooling.
  • the invention is therefore an object of the invention to provide a solution that provides a structurally simple way and cost, an improved method for heat treatment of workpieces and an apparatus for performing the method, so that related gas carburization processes are possible in an economically efficient manner.
  • the object is achieved in that the at least one treatment zone has at least one of at least one carburizing zone downstream Perlitization zone, which is provided with at least one temperature of the Perlitleiterszone holding a maximum of 720 ° C heating-cooling device wherein between the at least one carburization zone and the at least one pelitization zone is arranged at least one entry lock zone formed by a pair of movable doors and at least one workpiece is receivable, and wherein immediately before and / or within the entry lock zone the inert gas of the carburizing zone from the furnace space laxative protective gas discharge is provided.
  • the object is achieved in a method of the type designated input, that the workpieces in at least one of the at least one carburizing zone downstream perlitization zone, which is associated with the treatment zone to be cooled by means of at least one heating-cooling device to a temperature below 720 ° C to form a pearlitic structure, the workpieces prior to their arrangement in the at least one Perlitization be transported through at least one of the at least one carburizing zone downstream entrance lock zone, which is formed by a pair of movable doors and of which at least one workpiece is receivable, and wherein the protective gas of the carburizing zone at the latest within the entrance lock zone is discharged from the furnace chamber.
  • a heating-cooling device As a heating-cooling device is here to understand a device which is able to heat both a zone of the rotary hearth furnace as well as to cool. Such a heating-cooling device provides a largely constant temperature, so that either heat is removed from the zone during cooling or the atmosphere of the zone is heated by heat emission of the heating-cooling device of the heating-cooling device.
  • the invention provides a method and a rotary hearth furnace, by which the process of gas carburization including perlitization can be carried out safely and uncritically within a rotary hearth furnace, while avoiding the above-described risks of soot precipitation and uncontrolled deflagration.
  • This is achieved, inter alia, by the entrance lock zone, which separates the carburizing zone and the adjoining perlitization zone to prevent atmosphere exchange between the zones.
  • the separation causes different inert gas atmospheres to be used in the carburization zone and in the perlitization zone, so that, for example, when selecting the protective gas for the perlitization zone and handling it in this zone, the dangers described above correspond accordingly Be considered and counteracted.
  • the rotary hearth furnace according to the invention and the method operating the rotary hearth furnace provide in comparison to the known from the prior art systems with at least two furnaces cost and simple process management, which is feasible for the rotary hearth furnace according to the invention by a functionally appropriate and little space-consuming construction.
  • the perlitization within a single rotary hearth furnace dramatically reduces the process time in gas carburizing so that workpieces can be heat treated in much less time as a result of the invention, especially when hitherto poor carburizing temperatures of up to about 1100 ° C have been used.
  • Such high carburizing temperatures can hitherto only be used with special fine-grain-stabilized alloys in conjunction with a residual risk of obtaining a coarse grain while gas carburizing.
  • the invention provides that the protective gas of the carburizing zone is removed from the furnace chamber at the latest within the entry lock zone, so that it cools in the entry lock zone or in the Perlitization zone does not come to soot precipitations and / or deflagrations.
  • the invention provides, in an embodiment of the rotary hearth furnace, that at least one heating-cooling device cooling the workpiece is arranged within the input lock zone.
  • the workpieces are already cooled within the entrance lock zone by means of the heating-cooling device, before the workpieces reach the at least one perlitization zone.
  • cooling air and / or cooling water are sprayed into the inlet lock zone for the convective cooling of the workpieces.
  • the at least one perlitization zone is followed by at least one exit sluice zone formed by a pair of movable doors and at least one Workpiece is receivable.
  • the perlitization zone is adjoined by at least one further treatment zone, which may be located inside or outside the rotary hearth furnace and serves to reheat the workpieces to an austentitization temperature, it is advantageous, in view of shortening the process duration, if at least one of the at least one exit sluice zone a heating / cooling device heating the workpiece is arranged or when the workpieces are heated within the at least one exit lock zone by means of a heating-cooling device.
  • the invention provides for the at least one perlication zone to be preceded by at least one entrance lock zone with a pair of movable doors and at least one exit lock zone connected to a pair of movable doors, wherein purely optionally the entrance lock zone and / or the exit lock zone each comprise at least one Can have heating and cooling device.
  • a structure with desired properties can be produced particularly efficiently and economically within the rotary hearth furnace if at least one heating zone is connected downstream of at least one heating / cooling device with at least one heating / cooling device which heats the workpieces to at least austenitizing temperature.
  • the invention provides, in a further embodiment, that the at least one exit-lock zone is arranged between the at least one pearlization zone and the at least one heating zone.
  • the at least one pervaporation zone has an inert gas supply for the convective cooling of the workpieces or if protective gas is supplied to the at least one pyrolysis zone, which is the protective gas of the carburizing zone is different.
  • the invention provides that an outlet protective gas discharge is provided downstream of the at least one pearlization zone and the protective gas originating from the at least one pearlization zone dissipates.
  • the invention provides that the at least one perlitization zone itself has an inert gas discharge which dissipates the protective gas supplied to the at least one perlitization zone.
  • the protective gas discharged from the perlitization zone can then be treated, cooled and made available to the protective gas feed for refeeding into the at least one pearlization zone.
  • the method applies that the protective gas supplied to the at least one pelitization zone is removed from the at least one pyrolysis zone.
  • the protective gas can then be treated outside the furnace chamber and cooled, and subsequently the at least one perlitization zone can be recycled as protective gas.
  • the preparation and reuse of the Protective gas has a favorable effect on the process control of the at least one perlitization zone.
  • FIG. 1 a schematic plan view of a rotary hearth furnace 1 according to the invention in ring type.
  • the rotary hearth furnace 1 is used for heat treatment of workpieces 2 and in particular for Gasaufkohlung of metallic workpieces 2.
  • the rotary hearth furnace 1 in the FIG. 1 Not shown ceiling plate, an outer wall 3, an inner wall 4 and a rotary hearth 5, on which the workpieces 2 are arranged.
  • the ceiling plate of the rotary hearth 5 and the outer and inner walls 3, 4 define a furnace chamber 6, wherein the rotary hearth 5 the furnace chamber 6 bottom side and the outer wall 3 and the inner wall 4 limit the furnace chamber 6 in the circumferential direction.
  • the ceiling plate limits the furnace chamber 6 on the ceiling side.
  • the furnace chamber 6 has a carburizing zone 7, in which an enrichment of the workpieces 2 with carbon takes place under protective gas (endogas) or a protective gas atmosphere, and a treatment zone 8 downstream of the carburizing zone 7, the carburizing zone 7 already representing a type of treatment zone.
  • the one carburization zone 7 may be subdivided into several carburizing zones.
  • one of the carburizing zone 7 or the carburizing zones may be preceded by a heating zone.
  • At least one closable opening 9 is provided, which serves for loading and / or unloading of the furnace chamber 6 with workpieces 2.
  • a workpiece 2 introduced through the opening 9 into the furnace chamber 6 is arranged on the rotary hearth 5 or a frame mounted on the rotary hearth 5 and then rotates together with the rotary hearth 5 rotatable about an imaginary axis of rotation 10, the direction of rotation being counteracted in the illustrated embodiment clockwise, in the direction of arrow A.
  • the rotary hearth furnace 1 according to the invention can be operated in an opposite direction of rotation, in which case the different zones are to be arranged accordingly.
  • the introduced through the opening 9 in the furnace chamber 6 and arranged on the rotary hearth 5 workpieces 2 first pass through the carburizing zone 7, in which they are enriched in a corresponding inert gas atmosphere, at least in its edge region with carbon at a temperature of about 950 ° C. In this enrichment with carbon, however, the initially described effect of grain coarsening occurs.
  • a perlitization is provided within the rotary hearth furnace 1, which takes place in the treatment zone 8 downstream of the carburizing zone 7.
  • the treatment zone 8 at the same time corresponds to the perlitization 11th
  • the rotating with the rotary 5 workpieces 2 of the carburizing zone 7, in which the workpieces 2 at a temperature above 900 ° C under inert gas eg an endogas with about 20 % CO, approx. 40% H 2 , approx.
  • the rotary hearth furnace 1 has a plurality of doors 12, 14, 15 and 16, which are vertically movable, for example, and separate the carburization zone 7 from the perlitization zone 11.
  • the perlitization zone 11, which is defined by the pair of doors 14 and 15, is equipped with heating-cooling devices 17a and 17b, which within the perlitization zone 11 in the region of the outer wall 3 and inner wall 4 are arranged and ensure that prevails in the perlitization zone 11, a maximum temperature of 720 ° C, preferably a temperature of about 650 ° C in the perlitization zone 11 is desired.
  • the heating-cooling devices 17a and 17b serve to cool the workpieces 2 coming from the carburizing zone 7 to a temperature of less than 720 ° C., so that a pearlitic structure can be formed.
  • a protective gas discharge 19 is provided in the illustrated exemplary embodiment within the input lock zone 18, which discharges the protective gas originating from the carburizing zone 7.
  • a protective gas discharge could be provided immediately in front of the door 12 within the carburizing zone 7, so that virtually no protective gas of the carburizing zone 7 accumulates in the inlet lock zone 18.
  • Protective gas discharge 19 gas can be optionally burned off.
  • the duration of the cooling process for the workpieces 2 can be shortened by different measures in the rotary hearth furnace 1 according to the invention.
  • a first, optional measure provides within the entrance lock zone 18 heating-cooling devices 20a and 20b for cooling the workpieces 2, wherein only one of the two heating-cooling devices 20a or 20b may be provided.
  • cooling air and / or cooling water can be sprayed into the entrance lock zone 18 for convective cooling of the workpieces, but then due to the risk of deflagration is then strictly ensure that no air enters the perlitization.
  • the heating-cooling devices 17a and 17b are provided for cooling the workpieces 2 within the perlitization zone 11.
  • the cooling of the workpieces 2 can be assisted by a protective gas supply 21, wherein the inert gas supplied to the perlitization zone 11 has a composition different from the protective gas of the carburizing zone 7 and serves for the convective cooling of the workpieces 2.
  • an inert gas discharge 22 is optionally provided within the perlitization zone 11. As a result of this measure, it is possible to constantly introduce new protective gas into the perlitization zone 11 and to burn the protective gas possibly provided with combustible gases and discharged from the protective gas discharge 22.
  • the workpieces 2 are then brought to Umkornung in a subsequent treatment zone, which is referred to herein as the heating zone 23, to a temperature above 800 ° C or Austenitmaschinestemperatur.
  • the heating zone 23 downstream of the perlitization zone 11 has in the FIG. 1 Not shown heating-cooling devices to heat the workpieces 2 to Austenitmaschinestemperatur.
  • the perlitization zone 11 is followed by an exit sluice zone 24.
  • the exit lock zone 24 is in this case formed by the pair of movable doors 15 and 16 and, like the entrance lock zone 18, can receive at least one workpiece 2.
  • the outlet lock zone 24 arranged between the perlitization zone 11 and the heating zone 23 has, in the embodiment shown, an outlet protective gas outlet 25, which is connected downstream of the perlitization zone 11 and which discharges the protective gas originating from the perlitization zone 11.
  • the outlet protective gas discharge 25 can also be arranged outside the exit lock zone 24 in the region of the door 16 within the heating zone 23 in order to prevent the protective gas from the pelation zone 11 from spreading in the heating zone 23 and mixing with the protective gas there.
  • heating / cooling devices 26a and 26b are already provided within the exit lock zone 24, whereby the workpieces 2 having a temperature higher than the temperature for perlitization enter the heating zone 23 ,
  • the process of perlitization in the perlitization zone 11 and subsequent austenitization in the heating zone 23 may be repeated more than once, which may be referred to as so-called "commuting" within a temperature range for refining the texture. It is therefore conceivable according to a conceivable modification of the embodiment shown, a rotary hearth furnace 1, in which alternately perlitization zone 11 and heating zone 23 alternate to produce a workpiece 2 with a desired fine-grained structure and with a corresponding carbon content in its edge region. It is imperative that the perlitization zone 11 and the heating zone 23 are separated and separated from one another by means of appropriate sluice zones.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Tunnel Furnaces (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Claims (17)

  1. Four à sole tournante (1) en mode de construction annulaire pour le traitement thermique de pièces à usiner (2), notamment pour la cémentation en milieu gazeux de pièces à usiner métalliques, comprenant une paroi extérieure et une paroi intérieure (3, 4) qui délimitent un espace du four (6), qui comporte au moins une zone (7) de cémentation en milieu gazeux dans laquelle sous gaz inerte s'effectue un enrichissement des pièces à usiner (2) avec du carbone et au moins une zone de traitement (8) montée en aval de l'au moins une zone (7) de cémentation en milieu gazeux, dans la paroi extérieure (3) étant prévue au moins une ouverture (9) fermable pour le chargement et/ou le déchargement de l'espace du four (6) avec des pièces à usiner (2),
    caractérisé en ce que l'au moins une zone de traitement (8) comporte au moins un zone de perlitisation (11) montée en aval de l'au moins une zone (7) de cémentation en milieu gazeux, qui est munie d'au moins un dispositif de réchauffement/de refroidissement (17a, 17b) maintenant la zone de perlitisation (11) à un maximum de 720°C, entre l'au moins une zone (7) de cémentation en milieu gazeux et l'au moins une zone de perlitisation (11) étant placée au moins une zone de sas d'entrée (18) qui est formée par une paire de portes (12, 14) mobiles et qui peut accueillir au moins une pièce à usiner (2) et directement avant et/ou à l'intérieur de la zone de sas d'entrée (18) étant prévue une évacuation de gaz inerte (19) évacuant hors de l'espace du four (6) le gaz inerte de la zone (7) de cémentation en milieu gazeux.
  2. Four à sole tournante (1) selon la revendication 1, caractérisé en ce qu'à l'intérieur de la zone de sas d'entrée (18) est placé au moins un dispositif de réchauffement/de refroidissement (20a, 20b) refroidissant la pièce à usiner (2).
  3. Four à sole tournante (1) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'en aval de l'au moins une zone de perlitisation (11) est montée au moins une zone de sas de sortie (24) qui est formée par une paire de portes (15, 16) mobiles et qui peut accueillir au moins une pièce à usiner (2).
  4. Four à sole tournante (1) selon la revendication 3, caractérisé en ce qu'à l'intérieur de l'au moins une zone de sas de sortie (24) est placé au moins un dispositif d'échauffement/de refroidissement (26a, 26b) chauffant les pièces à usiner (2).
  5. Four à sole tournante (1) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'en aval de l'au moins une zone de perlitisation (11) est montée au moins une zone d'échauffement (23) avec au moins un dispositif d'échauffement/de refroidissement chauffant les pièces à usiner à au moins la température d'austénitisation.
  6. Four à sole tournante (1) selon la revendication 5, caractérisé en ce que l'au moins une zone de sas de sortie (24) est placée entre l'au moins une zone de perlitisation (11) et l'au moins une zone d'échauffement (23).
  7. Four à sole tournante (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'au moins zone de perlitisation (11) comporte une alimentation de gaz inerte (21) alimentant un gaz inerte pour le refroidissement par convection des pièces à usiner (2).
  8. Four à sole tournante (1) selon la revendication 7, caractérisé en ce que l'au moins une zone der perlitisation (11) comporte une évacuation de gaz inerte (22) qui évacue le gaz inerte alimenté dans l'au moins une zone de perlitisation (11).
  9. Four à sole tournante (1) selon la revendication 7 ou la revendication 8, caractérisé en ce qu'il est prévu une évacuation de sortie (25) du gaz inerte qui est placée en aval de l'au moins une zone de perlitisation (11) et qui évacue le gaz inerte émanant de et arrivant dans l'au moins une zone de perlitisation (11).
  10. Procédé destiné au traitement thermique de pièces à usiner (2) dans un four à sole tournante (1), avec un espace de four (6) qui comporte au moins une zone (7) de cémentation en milieu gazeux et au moins une zone de traitement (8) montée en aval de l'au moins une zone (7) de cémentation en milieu gazeux, dans l'au moins une zone (7) de cémentation en milieu gazeux, les pièces à usiner (2) étant enrichies en carbone sou gaz inerte, à une température supérieure à 900°C,
    caractérisé en ce que dans l'au moins une zone de perlitisation (11) montée en aval de la zone (7) de cémentation en milieu gazeux qui est associée à la zone de traitement (8), à l'aide d'au moins un dispositif de réchauffement/de refroidissement (17a, 17b), on refroidit les pièces à usiner (2) à une température inférieure à 720 °C pour créer une structure perlitique, avant leur placement dans l'au moins une zone de perlitisation (11), les pièces à usiner étant transportées par l'intermédiaire d'au moins une zone de sas d'entrée (18) montée en aval de l'au moins une zone (7) de cémentation en milieu gazeux qui est formée par une paire de portes (12, 14) mobiles et qui peut recevoir au moins une pièce à usiner (2) et le gaz inerte de la zone (7) de cémentation en milieu gazeux étant évacué hors de l'espace du four (6) au plus tard à l'intérieur de la zone de sas d'entrée (18).
  11. Procédé selon la revendication 10, caractérisé en ce que les pièces à usiner (2) sont refroidies à l'intérieur de la zone de sas d'entrée (18) au moyen d'au moins un dispositif d'échauffement/de refroidissement (20a, 20b).
  12. Procédé selon la revendication 10 ou la revendication 11, caractérisé en ce que de l'air de refroidissement et/ou de l'eau de refroidissement sont vaporisés dans la zone de sas d'entrée (18) pour le refroidissement par convection des pièces à usiner (2).
  13. Procédé selon l'une quelconque des revendications 10 à 12, caractérisé en ce que les pièces à usiner (2) sont transportées par l'intermédiaire d'au moins une zone de sas de sortie (24) qui est formée par une paire de portes (15, 16) mobiles et qui peut accueillir au moins une pièce à usiner (2), montée en aval de l'au moins une zone de perlitisation (11).
  14. Procédé selon la revendication 13, caractérisé en ce que les pièces à usiner (2) sont chauffées à l'intérieur de l'au moins une zone de sas de sortie (24) au moyen d'au moins un dispositif de réchauffement/de refroidissement (26a, 269b).
  15. Procédé selon l'une quelconque des revendications 10 à 14, caractérisé en ce que du gaz inerte est alimenté dans l'au moins une zone de perlitisation (11).
  16. Procédé selon la revendication 15, caractérisé en ce que le gaz inerte alimenté dans l'au moins une zone de perlitisation (11) est évacué hors de l'au moins une zone de perlitisation (11).
  17. Procédé selon la revendication 16, caractérisé en ce que le gaz inerte évacué hors de la zone de perlitisation (11) est traité et refroidi hors de l'espace du four (6) et recyclé vers l'au moins une zone de perlitisation (11) en tant que gaz inerte.
EP12175924.5A 2012-07-11 2012-07-11 Procédé et four à sole tournante destinés au traitement thermique de pièces à usiner Not-in-force EP2685193B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP12175924.5A EP2685193B1 (fr) 2012-07-11 2012-07-11 Procédé et four à sole tournante destinés au traitement thermique de pièces à usiner
PL12175924T PL2685193T3 (pl) 2012-07-11 2012-07-11 Sposób oraz piec karuzelowy do obróbki cieplnej elementów obrabianych
ES12175924.5T ES2532581T3 (es) 2012-07-11 2012-07-11 Procedimiento y horno de hogar rotativo para el tratamiento térmico de piezas de trabajo
CN201310242607.6A CN103540943B (zh) 2012-07-11 2013-06-18 装载和卸载热处理炉的设备和方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12175924.5A EP2685193B1 (fr) 2012-07-11 2012-07-11 Procédé et four à sole tournante destinés au traitement thermique de pièces à usiner

Publications (2)

Publication Number Publication Date
EP2685193A1 EP2685193A1 (fr) 2014-01-15
EP2685193B1 true EP2685193B1 (fr) 2015-01-14

Family

ID=46724223

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12175924.5A Not-in-force EP2685193B1 (fr) 2012-07-11 2012-07-11 Procédé et four à sole tournante destinés au traitement thermique de pièces à usiner

Country Status (4)

Country Link
EP (1) EP2685193B1 (fr)
CN (1) CN103540943B (fr)
ES (1) ES2532581T3 (fr)
PL (1) PL2685193T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105925766A (zh) * 2016-07-07 2016-09-07 安庆市庆华精工机械有限责任公司 一种转炉出钢口的热处理装置
CN105925787A (zh) * 2016-07-07 2016-09-07 安庆市庆华精工机械有限责任公司 一种新型耐高温轴承的挂式热处理装置及处理方法
CN105925785A (zh) * 2016-07-07 2016-09-07 安庆市庆华精工机械有限责任公司 一种奥贝球铁衬套的热处理装置及处理方法
CN107990721A (zh) * 2017-12-25 2018-05-04 青州鑫晖热能科技有限公司 一种隧道式反应釜搪瓷搅拌器烧结炉
CN113652631A (zh) * 2021-08-29 2021-11-16 梁能舟 一种金属热处理用箱式气体渗碳炉

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1758460B1 (de) * 1968-06-05 1971-05-06 Degussa Ofenanlage zur waermebehandlung von werkstuecken unter schutzgasatmosphaeren
DE3427716C1 (de) * 1984-07-27 1985-11-14 Daimler-Benz Ag, 7000 Stuttgart Drehherdofen in Ringbauart zur Waermebehandlung von Werkstuecken
DE19514289B4 (de) * 1995-04-24 2006-09-21 Loi Thermprocess Gmbh Ofenanlage zum Wärmebehandeln von Werkstücken
DE10310739A1 (de) * 2002-03-27 2003-10-09 Loi Thermprocess Gmbh Anlage zum Wärmebehandeln von Werkstücken
WO2005050112A2 (fr) * 2003-11-19 2005-06-02 Loi Thermprocess Gmbh Installation et procede permettant de traiter thermiquement des pieces a usiner
DE102007038991A1 (de) 2007-08-17 2009-02-19 Daimler Ag Drehherdofen zur Wärmebehandlung von Werkstücken
CN201501905U (zh) * 2009-08-26 2010-06-09 宝山钢铁股份有限公司 辊底式多段退火炉

Also Published As

Publication number Publication date
CN103540943A (zh) 2014-01-29
PL2685193T3 (pl) 2015-05-29
EP2685193A1 (fr) 2014-01-15
CN103540943B (zh) 2017-03-01
ES2532581T3 (es) 2015-03-30

Similar Documents

Publication Publication Date Title
EP2685193B1 (fr) Procédé et four à sole tournante destinés au traitement thermique de pièces à usiner
EP0562250B1 (fr) Procédé et dispositif de trempe de pièces métalliques
DE60004233T2 (de) Verfahren und anlage für inline wärmebehandlung von warmgewalztem walzgut
EP2905346B1 (fr) Procede de traitement de la chaleur
DE69525171T2 (de) Verfahren zum herstellen nahtloser stahlrohre und produktionsanlage dafür
DE112014004502T5 (de) Nitrierungs-Verfahren für ein Stahl-Element
EP3420111B1 (fr) Procédé de traitement thermique ciblé sur les zones d'une pièce
EP2717008A2 (fr) Four industriel étanche au gaz de protection, notamment four à chambre, four poussant, four à sole tournante ou four à sole annulaire
EP3132062A1 (fr) Procédé et dispositif de fabrication d'un feuillard d'acier
DE1292696B (de) Verfahren zur Erhoehung der Lebensdauer von Waelzpaarungen
EP4153789A1 (fr) Traitement thermique d'élément
DE2224686A1 (de) Verfahren und Vorrichtung zur Herstellung zylindrischer Stahlgegenstände, die über den Querschnitt einen Härtebereich aufweisen, insbesondere von Walzen für Walzwerke
EP1786935B1 (fr) Procede pour traiter thermiquement des pieces de roulement en acier
DE102005053134A1 (de) Anlage zur trockenen Umwandlung eines Material-Gefüges von Halbzeugen
WO2006013055A1 (fr) Procede de traitement thermique de pieces en acier
EP2186916B1 (fr) Procédé et installation de cémentation continue
DE10117987A1 (de) Chargiergestell für die Wärme- und/oder Kühlbehandlung von zu härtenden Metallteilen
DE3819803C1 (fr)
DE102015211901B4 (de) Induktor für eine Induktionshärteanlage
EP3925716B1 (fr) Procédé de durcissement à la presse des plaques déformables à chaud
DE102014221068A1 (de) Anlage und Verfahren zur Herstellung von Grobblechen
WO2014173494A1 (fr) Procédé de réglage du point de rosée d'un four de traitement thermique
DE60010467T2 (de) Glühofen
DE102009053343B4 (de) Stoßofen, Ofenanlage und thermisches Behandlungsverfahren
EP4015657B1 (fr) Traitement thermique de composants

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: 20130326

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20140703

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

INTG Intention to grant announced

Effective date: 20141127

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM 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: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 707280

Country of ref document: AT

Kind code of ref document: T

Effective date: 20150215

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502012002090

Country of ref document: DE

Effective date: 20150305

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2532581

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20150330

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20150114

REG Reference to a national code

Ref country code: PL

Ref legal event code: T3

REG Reference to a national code

Ref country code: SK

Ref legal event code: T3

Ref document number: E 18208

Country of ref document: SK

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 4

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

Ref country code: HR

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: 20150114

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: 20150114

Ref country code: NO

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: 20150414

Ref country code: LT

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: 20150114

Ref country code: BG

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: 20150414

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

Ref country code: IS

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: 20150514

Ref country code: NL

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: 20150114

Ref country code: RS

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: 20150114

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: 20150415

Ref country code: LV

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: 20150114

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502012002090

Country of ref document: DE

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

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: 20150114

Ref country code: RO

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: 20150114

Ref country code: EE

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: 20150114

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: 20151015

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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150114

Ref country code: SI

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: 20150114

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150711

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

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

Ref country code: LI

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

Effective date: 20150731

Ref country code: CH

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

Effective date: 20150731

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 5

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 NON-PAYMENT OF DUE FEES

Effective date: 20150711

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

Effective date: 20160711

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

Ref country code: MT

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: 20150114

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

Ref country code: SM

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: 20150114

Ref country code: GB

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

Effective date: 20160711

Ref country code: HU

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

Effective date: 20120711

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

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: 20150114

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 6

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: 20150731

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

Ref country code: CZ

Payment date: 20170710

Year of fee payment: 6

Ref country code: SK

Payment date: 20170710

Year of fee payment: 6

Ref country code: ES

Payment date: 20170825

Year of fee payment: 6

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

Ref country code: PL

Payment date: 20170706

Year of fee payment: 6

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

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: 20150114

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: 20150114

Ref country code: MK

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: 20150114

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 7

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

Ref country code: AL

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: 20150114

REG Reference to a national code

Ref country code: SK

Ref legal event code: MM4A

Ref document number: E 18208

Country of ref document: SK

Effective date: 20180711

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

Ref country code: CZ

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

Effective date: 20180711

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

Ref country code: SK

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

Effective date: 20180711

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20190917

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 NON-PAYMENT OF DUE FEES

Effective date: 20180712

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

Ref country code: PL

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

Effective date: 20180711

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

Ref country code: FR

Payment date: 20200723

Year of fee payment: 9

Ref country code: DE

Payment date: 20200721

Year of fee payment: 9

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

Ref country code: SE

Payment date: 20200727

Year of fee payment: 9

Ref country code: IT

Payment date: 20200724

Year of fee payment: 9

Ref country code: AT

Payment date: 20200722

Year of fee payment: 9

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502012002090

Country of ref document: DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 707280

Country of ref document: AT

Kind code of ref document: T

Effective date: 20210711

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

Ref country code: DE

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

Effective date: 20220201

Ref country code: AT

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

Effective date: 20210711

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

Ref country code: SE

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

Effective date: 20210712

Ref country code: FR

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

Effective date: 20210731

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: 20210711