EP0621904B1 - Dispositif de traitement thermique de pieces metalliques - Google Patents

Dispositif de traitement thermique de pieces metalliques Download PDF

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Publication number
EP0621904B1
EP0621904B1 EP92902177A EP92902177A EP0621904B1 EP 0621904 B1 EP0621904 B1 EP 0621904B1 EP 92902177 A EP92902177 A EP 92902177A EP 92902177 A EP92902177 A EP 92902177A EP 0621904 B1 EP0621904 B1 EP 0621904B1
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EP
European Patent Office
Prior art keywords
gas
lock
furnace unit
individual
tight
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
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EP92902177A
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German (de)
English (en)
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EP0621904A1 (fr
Inventor
Helmut Egger
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Aichelin GmbH Germany
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Aichelin GmbH Germany
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Priority to AT92902177T priority Critical patent/ATE151469T1/de
Publication of EP0621904A1 publication Critical patent/EP0621904A1/fr
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    • 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
    • C21D9/0006—Details, accessories not peculiar to any of the following furnaces
    • C21D9/0018—Details, accessories not peculiar to any of the following furnaces for charging, discharging or manipulation of charge
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/0024—Charging; Discharging; Manipulation of charge of metallic workpieces
    • 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
    • F27B17/00—Furnaces of a kind not covered by any preceding group
    • F27B17/0016—Chamber type furnaces
    • F27B2017/0091—Series of chambers, e.g. associated in their use
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
    • F27D7/06—Forming or maintaining special atmospheres or vacuum within heating chambers

Definitions

  • rotary hearth furnaces were combined with upstream and downstream piercing or pulling furnaces. While the carburizing is usually carried out in the one- or two-stage rotary hearth area, the heating and diffusing mostly takes place in the piercing or pulling yards.
  • Such an oven system is known from DE 34 41 338 A1.
  • the workpieces are heated in an impact furnace under protective gas and then transferred via an intermediate door into the connected carburizing chamber, which is designed as a rotary rotary furnace that can be rotated in cycles.
  • the individual batches can be transferred via an intermediate door to a subsequent diffusion chamber, which is also designed as a cyclically operated rotary cycle furnace. From the diffusion chamber, the batches pass through an intermediate door into a compensation chamber which is designed as an impact furnace.
  • the carburizing time of the individual batches can be controlled differently, so that different workpieces can be heat treated or different case hardening depths can be achieved.
  • the workpieces are fed in batches via a horizontally running conveyor belt.
  • the batches are placed on a table which conveys the batches vertically upwards through the bottom of a loading unit which is open at the bottom.
  • the bottom is closed by means of a gas-tight door.
  • the batches then pass through another horizontal one Conveyor on a second lifting table, where they are placed on a lower cover of a first vertical shaft furnace.
  • the batches are then moved from below into the first vertical shaft furnace by means of a piston-cylinder unit, so that it is sealed gas-tight after the batch has been moved in.
  • the batches are then treated in the first vertical shaft furnace at a low temperature.
  • the batches are lowered again and then reach the bottom of a second vertical shaft furnace of a similar design by means of the same horizontal conveying device.
  • the batches are then raised again so that the second vertical shaft furnace is closed and the batch can be subjected to a second heat treatment step at high temperature.
  • the batches are then lowered again and are moved in the same plane by means of a further horizontal conveyor in a direction angled by 90 ° through a lock door into an output lock. From this discharge lock, the batches are brought down into a quenching bath by means of a basket elevator and then discharged horizontally on the lower level.
  • the conveyor devices between the inlet of the loading unit and the outlet of the conveyor which is angled by 90 °, are designed to be gas-tight by means of gas-tight closable doors.
  • the invention is therefore based on the object of providing a device for the heat treatment of metallic workpieces which ensures the greatest possible flexibility.
  • a major advantage of this structure is that the heat treatment parameters for each individual batch can be freely selected for each individual chamber, i.e. Temperature, dwell time and atmosphere can be controlled individually for each individual batch. Such a structure can be used particularly advantageously for flexible gas carburizing for smaller heat treatment batches.
  • heat treatment parameters pressure, temperature and residence time can be controlled separately for each individual batch, heat treatments can be carried out with particularly high precision for high-quality parts. This possibility is further improved in that a diffusion calculation with real data can be carried out for each individual batch.
  • each individual chamber can be closed via gas-tight doors and the temperature and residence time can be individually controlled, different heat treatment processes can be carried out in the individual chambers at the same time.
  • gas carburizing, carbonitriding, quenching and tempering, nitrocarburizing, etc. can be carried out in various individual chambers as part of a cyclical operation. This means that even small batches can be processed economically.
  • Another advantage of the device according to the invention is that empty gratings are not required, which ensures particularly economical operation with widely varying utilization and minimizes wear.
  • the batch transport can be carried out at the starting point of each batch (cold batch before the start of the heat treatment) to the exit point of the batch from a quenching unit or a cooling lock under a protective gas atmosphere, preferably in an oxidation-free protective gas atmosphere.
  • the invention also has the advantage that the system can be filled with particularly short cycle times, which is particularly advantageous in the case of different heat treatment parameters for individual batches, for example to achieve different case hardening depths.
  • the intermediate transfer lock is also equipped with a vacuum inlet lock.
  • At least one downstream furnace unit has a plurality of individual chambers, each of which can be closed via gas-tight doors, the temperature, residence time and atmosphere for each individual chamber being individually controllable.
  • This measure has the advantage that an optimized intermediate or final heat treatment can be carried out for each batch, since the temperature, residence time and atmosphere can be freely selected.
  • an intermediate treatment chamber is provided for this purpose, which can be connected to a subsequent final treatment chamber via a gas-tight door.
  • Additional units can optionally be connected to the intermediate or final treatment chamber, preferably an outlet lock with a quenching bath for oil, salt or polymer quenching, a single removal device with a hardening press and after-cooling device for hardening sensitive workpieces, a high-pressure gas quenching unit or a gas cooling lock.
  • the system can be expanded to include additional individual chambers due to the modular structure, the other system parts, such as quenching baths, transfer locks and the like, being able to be retained.
  • the entire system can of course be supplemented with other system components, e.g. Washing devices, tempering ovens with cooling section and the like ..
  • the cooling gas from the high-pressure quenching chamber can advantageously be used for the inert gas admission to the intermediate transfer lock, the inlet transfer lock and / or the vacuum inlet lock.
  • Fig. 1 shows a first embodiment of the invention, which is generally designated by the number 10.
  • a first furnace unit 12 is divided into three identical individual chambers 13, each of which can be closed via gas-tight inlet doors and outlet doors 21.
  • Another furnace unit 14 has an intermediate treatment chamber 15 with a gas-tight entrance door, which can be connected to a final treatment chamber 16 via a gas-tight connecting door.
  • the heat treatment parameters temperature, residence time and gas atmosphere can be controlled individually.
  • An inlet transfer lock 18 is provided for loading the first furnace unit 12, into which individual gratings with batches of workpieces can be inserted via a vacuum inlet lock 23.
  • a grate transport wagon 30 can be moved in the inlet transfer lock 18 via a gastight drag chain circulating drive 28.
  • a servomotor with positioning control is used for the drive, which enables the grate transport carriage 30 to be positioned in front of the outlet of the vacuum inlet lock 23 or in front of the entrance of each individual chamber 13 of the furnace unit 12.
  • transverse push device 26 For pushing the grids out of the vacuum inlet lock 23 into the inlet transfer lock 18 or for inserting them from the inlet transfer lock 18 through an open inlet door into a single chamber 13 and for later pushing them out of the single chamber through an opened outlet door, there is a transverse push device 26 intended.
  • the first furnace unit 12 and the intermediate treatment chamber 15 of the subsequent furnace unit 14 are connected via an intermediate transfer lock 19.
  • the intermediate transfer lock 19 is not heated and is provided with internal insulation for radiation protection.
  • a grate transport carriage 29 is again provided, which can be moved and positioned within the intermediate transfer lock 19 via a gas-tight grate transport carriage drive 27.
  • Both the inlet transfer lock 18 and the intermediate transfer lock 19 are exposed to protective gas.
  • Workpiece batches can be fed to each of the individual chambers 13 via the inlet vacuum lock 23 and the inlet transfer lock 18 and after an individually controlled heat treatment (temperature, atmosphere and residence time) via the intermediate transfer lock 19 by means of the grate transport carriage 29 in front of the following one Intermediate treatment chamber 15 are transported under protective gas.
  • the grate can be inserted into the intermediate treatment chamber 15 via the cross joint device with the inlet door open.
  • the grate can be pushed further into the final treatment chamber 16 via a further cross joint device with the intermediate door open.
  • a quench bath 31 for oil or salt quenching is connected to the final treatment chamber 16 via a gas-tight outlet door, with a downstream outlet lock, from which the workpiece batches can be removed after leaving the hardening bath.
  • a further vacuum inlet lock 24 is connected to the intermediate transfer lock 19, via which individual workpiece batches can be fed directly to the intermediate treatment chamber 15 by bypassing the first furnace unit 12 for repair purposes or for exclusive hardening via the intermediate transfer lock 19.
  • the individual workpiece batches are moved by means of a loading carriage 39 over a transfer path 43 to a connecting channel 25, from which they can each be moved into the first vacuum lock 23 or the second vacuum lock 24 by means of a transverse impact drive.
  • the individual workpiece batches can be stored in a storage path 41 via a loading / unloading lifting table 42 and can be transferred from this into the loading carriage 39.
  • the workpiece batches can be loaded by means of the loading carriage 39 to other components of the system, to low-temperature cells 37a, 37b to a washing device 36 or to a surface storage 40 for intermediate storage.
  • a further exemplary embodiment of the invention is designated as a whole by the number 50 in FIG. 2.
  • furnace units 52a, 52b are provided for high-temperature treatment, each of which is divided into three identical individual chambers 53, which can be closed via gas-tight inlet and outlet doors 61.
  • the temperature, gas atmosphere and dwell time of workpiece batches can be freely configured for each individual chamber 53.
  • an inlet transfer lock 58 is again provided in the manner previously described with reference to FIG. 1, which individual grates with batches of workpieces can be fed via a vacuum inlet lock 63.
  • a grate transport carriage 70 is provided in the inlet transfer lock 58, which can be positioned as desired via a gas-tight drag chain circulating drive 68 relative to the outlet of the vacuum inlet lock 63 or relative to the inlet doors 61 of the individual chambers 53.
  • transverse push devices 66 are again provided for pushing the grate between the individual components of the system.
  • two further furnace units 54a, 54b are provided, each of which has an intermediate treatment chamber 55a or 55b and a final treatment chamber 56a or 56b.
  • each the individual chambers can be closed via gas-tight doors 61 and the heat treatment parameters temperature, residence time and gas atmosphere can be freely selected.
  • the intermediate treatment chambers 55a and 55b are connected to an intermediate transfer lock 59 via gas-tight inlet doors.
  • the non-heated intermediate transfer lock 59 is in turn provided with internal insulation as radiation protection and is designed to be gas-tight for the application of protective gas.
  • a grate transport carriage 69 is provided, which can be moved in a targeted manner by a gas-tight drag chain circulating drive 67 with a servo motor and positioning control in order to expel a grate from a single chamber 53 into the intermediate To enable transfer lock 59 or pushing into one of the two intermediate treatment chambers 55a, 55b.
  • the inlet transfer lock 58 and the intermediate transfer lock 59 are completely exposed to protective gas.
  • the final treatment chamber 56a of the first subsequent furnace unit 54a is connected via a slotted sliding door 73 to an individual removal device 72, via which sensitive workpieces can be transferred to a hardening press 74 with after-cooling device for hardening without distortion.
  • the first final treatment chamber 56a is also connected via a gas-tight door to a quench bath 71a, for quenching in an oil or salt bath with a downstream outlet lock.
  • the second intermediate treatment chamber 55b has a gas-tight outlet door, via which workpiece batches can be transferred to a high-pressure gas quenching device 75.
  • the workpiece batches can alternatively from the second intermediate treatment chamber 55b via a gas-tight intermediate door to the final treatment chamber 56b, which in turn is connected via a gas-tight outlet door to a quench bath 71b for oil or salt with a downstream outlet lock.
  • a loading trolley 79 For loading and removing individual batches of workpieces, a loading trolley 79 is again provided, which can be moved via a transfer path 83 to the individual components or to their connecting lines. With the loading trolley 79, other system components, such as two surface storage units 80a, 80b, two starting furnaces with a cooling section 85a, 85b, two washing devices 76a, 76b and a loading / unloading lifting table 81 can also be started up.
  • Another exemplary embodiment of the invention is designated as a whole by the number 90 in FIG. 3.
  • a total of four furnace units 92a, 92b, 92c, 92d of identical construction are provided, each of which is divided into four identical individual chambers 93, which can be closed via inlet doors or outlet doors 101.
  • the heat treatment parameters temperature, gas atmosphere and residence time can be controlled individually for each individual chamber 93.
  • An inlet transfer lock 98b and 98a is provided for loading two furnace units 92a, 92b and 92c, 92d, respectively.
  • Grates with workpiece batches are fed into the inlet transfer locks 98a and 98b via a vacuum inlet lock 103a and 103b, respectively.
  • the inlet transfer locks 98a, 98b and the intermediate transfer lock 99 are designed to be gas-tight and subjected to protective gas.
  • the intermediate transfer lock 99 is not heated and is provided with internal insulation as radiation protection.
  • grate transport carriages 110a, 110b and 109 are provided, each via a gas-tight grate transport carriage drive 108a, 108b and 107 within the inlet transfer locks 98a, 98b and within the intermediate transfer lock 99 can be moved and positioned.
  • Transverse joint devices 106 are in turn provided for transporting the grids between the individual components of the system.
  • the intermediate transfer lock 99 is connected to a subsequent furnace unit 94 which has an intermediate treatment chamber 95 and a final treatment chamber 96 separated therefrom via a gas-tight door.
  • the workpiece grates are pushed in from the intermediate transfer lock 99 after the gas-tight inlet door has been opened via the cross joint device and, after an intermediate treatment step, are pushed into the final treatment chamber 96 in order to carry out a further heat treatment step.
  • the heat treatment parameters temperature, atmosphere and residence time can in turn be controlled separately for each individual workpiece batch.
  • the workpiece batches can either be removed from a single removal device 112 via a slot sliding door 113 and transferred to a hardening press 114 with aftercooling device, or removed via an outlet gas cooling lock 111 and cooled without pressure.
  • an aftertreatment unit 124 with a conveyor belt transport device which comprises a washing unit, a drying unit, a starting unit and a downstream air cooling unit.
  • a reloading manipulator 125 with position control is used to handle the workpieces during the individual removal and for transfer to the hardening press 114.
  • Another reloading manipulator 125 with position control is provided for handling the workpieces in the loading and unloading area 122.
  • Two loading carriages 119a, 119b are provided for feeding or removing the workpieces, which can be moved on a transfer path 123. From the loading trolley 119b, the grids with the workpiece batches each reach the vacuum inlet locks 103a and 103b via a connecting channel 126.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Tunnel Furnaces (AREA)

Abstract

Un dispositif de traitement thermique de pièces métalliques comprend au moins deux unités à fourneaux (12, 14) dont au moins la première (12) comprend une pluralité de chambres individuelles (13) susceptibles d'être fermées par des portes (61) étanches aux gaz. Les charges de pièces peuvent être sélectivement introduites directement dans chaque chambre individuelle (13), soumises à un traitement thermique avec des paramètres individuellement réglables (température, durée de séjour et atmosphère), puis retirées des chambres individuelles afin d'être soumises à un traitement thermique ultérieur dans l'unité suivante à fourneau (14). La répartition modulaire des unités à fourneaux (12, 14) en chambres individuelles (13, 15, 16) réglables individuellement permet d'obtenir une installation très flexible.

Claims (10)

  1. Dispositif de traitement thermique de pièces métalliques, comprenant :
    - une première unité de four au moins (12 ; 52a, 52b ; 92a à 92d) pouvant être fermée par des portes étanches aux gaz (21 ; 61 ; 101) pour effectuer une première étape de traitement thermique ;
    - une seconde unité de four au moins (14 ; 54a ; 54b ; 94), disposée à la suite de la première et pouvant être fermée par des portes étanches aux gaz (61 ; 73 ; 101, 113) pour effectuer une seconde étape de traitement thermique ;
    - les pièces pouvant être traitées, dans la première unité de four (12 ; 52a, 52b ; 92a à 92d) et dans la seconde unité de four (14 ; 54a, 54b ; 94), de façon individuelle pour chaque charge de pièces, en ce qui concerne la température, le temps de séjour et l'atmosphère ;
    - un dispositif d'amenée (23, 39, 43 ; 63, 79, 83 ; 103a, 103b, 119a, 119b, 123) pour l'alimentation en pièces, par pas successifs, d'une première unité de four au moins (12 ; 52a, 52b ; 92a à 92d), le dispositif d'amenée (23, 39, 43 ; 63, 79, 83 ; 103a, 103b, 119a, 119b, 123) comprenant une unité de chargement à faible perte de gaz et un premier moyen de transport étanche aux gaz (18 ; 58 ; 98a, 98b) associé à celle-ci ; et
    - un second moyen de transport étanche aux gaz (19 ; 59 ; 99) pour transporter les pièces, après le temps de séjour choisi individuellement, de la première unité de four au moins (12 ; 52a, 52b ; 92a à 92d) à la seconde unité de four au moins (14 ; 54a, 54b ; 94) ;
    caractérisé en ce que,
    - la première unité de four au moins (12 ; 52a, 52b ; 92a à 92d) comprend un ensemble de chambres individuelles (13 ; 53 ; 93) comportant chacune une porte d'entrée et une porte de sortie (21 ; 61 ; 101), la température, le temps de séjour et l'atmosphère de chaque charge de pièces dans chaque chambre individuelle (13 ; 53 ; 93) étant réglables individuellement ;
    - le premier moyen de transport est relié aux portes d'entrée (21) des chambres individuelles (13 ; 53 ; 93) en tant que sas de transfert d'entrée (18 ; 58 ; 98a, 98b) pour introduire directement des charges de pièces de façon sélective ;
    - le second moyen de transport est en relation, côté entrée, avec les portes de sortie (21) des chambres individuelles (13 ; 53 ; 93) en tant que sas de transfert intermédiaire (19 ; 59 ; 99) pour évacuer directement des charges de pièces, de façon sélective, et côté sortie, avec la seconde unité de four au moins (14 ; 54a, 54b ; 94) ; et en ce que
    - l'unité de chargement se présente sous la forme d'un sas d'entrée sous vide (23 ; 63 ; 103a, 103b).
  2. Dispositif selon la revendication 1, caractérisé en ce qu'il est prévu, devant chaque chambre individuelle (13 ; 53 ; 93), un dispositif de poussée latérale (26 ; 66 ; 106) pour le chargement et le déchargement.
  3. Dispositif selon l'une ou l'autre des revendications 1 et 2, caractérisé en ce que le sas de transfert intermédiaire (19) peut être relié à un autre sas de transfert sous vide (24).
  4. Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'une seconde unité de four au moins (14 ; 54a, 54b ; 94) comprend plusieurs chambres individuelles (15, 16 ; 55a, 55b, 56a, 56b ; 95, 96) pouvant toutes être fermées par des portes étanches aux gaz (61 ; 73 ; 101, 113), la température, le temps de séjour et l'atmosphère de chacune des chambres individuelles (15, 16 ; 55a, 55b, 56a, 56b 95 ; 96) étant réglables individuellement.
  5. Dispositif selon la revendication 4, caractérisé en ce qu'il est prévu, dans une seconde unité de four au moins (14 ; 54a, 54b ; 94), une chambre de traitement intermédiaire (15 ; 55a, 55b ; 95) qui peut être reliée à une chambre de traitement final (16 ; 56a, 56b ; 96) disposée à la suite de celle-ci, au moyen d'une porte étanche aux gaz (21 ; 61 ; 101).
  6. Dispositif selon la revendication 5, caractérisé en ce que la chambre de traitement final (16 ; 56a, 56b ; 96) peut être reliée à un sas de sortie (111) en passant par un bain de trempe (31 ; 71a, 71b).
  7. Dispositif selon l'une quelconque des revendications 4 à 6, caractérisé en ce que la seconde unité de four (54a, 94) peut être reliée à un dispositif de prélèvement individuel (72, 112) avec presse de trempe et dispositif de refroidissement (74 ; 114) pour pièces fragiles.
  8. Dispositif selon l'une quelconque des revendications 4 à 7, caractérisé en ce que la seconde unité de four suivante (54b) peut être reliée à un dispositif de trempe à gaz haute pression (75).
  9. Dispositif selon la revendication 8, caractérisé en ce que du gaz de refroidissement est envoyé sur le dispositif de trempe à gaz haute pression (75), sur le sas de transfert d'entrée intermédiaire (58) et/ou sur le sas d'entrée sous vide (63).
  10. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que la seconde unité de four (94), disposée à la suite, peut être reliée à un sas à gaz de refroidissement (111).
EP92902177A 1992-01-15 1992-01-15 Dispositif de traitement thermique de pieces metalliques Expired - Lifetime EP0621904B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT92902177T ATE151469T1 (de) 1992-01-15 1992-01-15 Vorrichtung zur wärmebehandlung metallischer werkstücke

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DE1992/000019 WO1993014229A1 (fr) 1992-01-15 1992-01-15 Dispositif de traitement thermique de pieces metalliques

Publications (2)

Publication Number Publication Date
EP0621904A1 EP0621904A1 (fr) 1994-11-02
EP0621904B1 true EP0621904B1 (fr) 1997-04-09

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EP (1) EP0621904B1 (fr)
JP (1) JPH06511514A (fr)
DE (1) DE59208341D1 (fr)
WO (1) WO1993014229A1 (fr)

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DE4316841A1 (de) * 1993-05-19 1994-11-24 Aichelin Gmbh Vorrichtung zur Wärmebehandlung metallischer Werkstücke
JP3895000B2 (ja) * 1996-06-06 2007-03-22 Ｄｏｗａホールディングス株式会社 浸炭焼入焼戻方法及び装置
FR2845695B1 (fr) * 2002-10-11 2004-12-17 Patherm Sa Procede et installation de traitement thermique de pieces metalliques
FR2874079B1 (fr) * 2004-08-06 2008-07-18 Francis Pelissier Machine de traitement thermochimique de cementation
JP6136681B2 (ja) * 2013-07-12 2017-05-31 大同特殊鋼株式会社 熱処理設備
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WO2016176382A1 (fr) * 2015-04-28 2016-11-03 Consolidated Engineering Company, Inc. Système et procédé de traitement thermique de pièces coulées en alliage d'aluminium
CN110257615A (zh) * 2019-07-19 2019-09-20 中科伟通智能科技（江西）有限公司 灵活型退火机构
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DE102021109672A1 (de) 2021-04-16 2022-10-20 Aerospace Transmission Technologies GmbH Vorrichtung zur Wärmebehandlung von metallischen Werkstücken
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CN115309128B (zh) * 2022-10-11 2023-01-03 苏州新凌电炉有限公司 一种热处理网带炉的控制方法

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DE2924270C2 (de) * 1979-06-15 1986-10-16 Dr. Werner Herdieckerhoff, Nachf. Industrieöfen-Apparatebau, 4750 Unna Arbeitsverfahren zur Gefüge- und/oder Oberflächenveredelung von Metallen und Vorrichtung dafür
FR2583774B1 (fr) * 1985-06-25 1992-08-14 Stein Heurtey Installation de traitements thermochimiques a temperatures et atmospheres differentes, notamment pour l'industrie automobile
US4861000A (en) * 1987-06-03 1989-08-29 Pierre Beuret Installation having several elements for heat treatments

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DE59208341D1 (de) 1997-05-15
JPH06511514A (ja) 1994-12-22
EP0621904A1 (fr) 1994-11-02
WO1993014229A1 (fr) 1993-07-22

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