EP1153146B1 - Four continu pourvu d'un dispositif pour la trempe de pieces et procede de trempe - Google Patents

Four continu pourvu d'un dispositif pour la trempe de pieces et procede de trempe Download PDF

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Publication number
EP1153146B1
EP1153146B1 EP00909114A EP00909114A EP1153146B1 EP 1153146 B1 EP1153146 B1 EP 1153146B1 EP 00909114 A EP00909114 A EP 00909114A EP 00909114 A EP00909114 A EP 00909114A EP 1153146 B1 EP1153146 B1 EP 1153146B1
Authority
EP
European Patent Office
Prior art keywords
lock
quenching
workpieces
quenching chamber
continuous furnace
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
EP00909114A
Other languages
German (de)
English (en)
Other versions
EP1153146A1 (fr
Inventor
Friedhelm Kuehn
Wolfgang Schalberger
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
Priority claimed from DE19919738A external-priority patent/DE19919738A1/de
Application filed by LOI Thermprocess GmbH filed Critical LOI Thermprocess GmbH
Publication of EP1153146A1 publication Critical patent/EP1153146A1/fr
Application granted granted Critical
Publication of EP1153146B1 publication Critical patent/EP1153146B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • C21D1/767—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulation; Reheating thereof
    • 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
    • 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
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/613—Gases; Liquefied or solidified normally gaseous material
    • 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

Definitions

  • the invention relates to a continuous furnace with a device for quenching of workpieces, the device being connected to a lock Removal of the workpieces.
  • the invention further relates to a method for quenching workpieces.
  • the continuous furnace can be designed as a pusher furnace, roller hearth furnace or rotary hearth furnace his.
  • the workpieces are in transit through the Batch oven, on grates or the like. in the oven the workpieces are exposed to a reaction gas, here endogas.
  • FR-A-2617953 describes a continuous furnace with a device for quenching Workpieces, the device being connected to a lock for removing the workpieces connects, a quench chamber connects vertically to the lock and the lock is provided with a transport device that the workpieces between the lock and quenching chamber transported.
  • the workpieces can be quenched with a cooling gas.
  • the object of the invention is to provide a continuous furnace with a device for Quenching and developing a method of quenching such that an energy-saving and environmentally friendly quenching of workpieces is made possible.
  • the workpieces are quenched without the problems mentioned at the beginning have to put up with the use of liquid quenching agents. Above all, there is no need to clean the workpieces from adhering oil or salt or water additives, which causes environmental problems.
  • Quenching with cooling gas has the advantage that the delay of the quenched Workpieces are small and also uniform.
  • the quenching chamber has only one Has opening for loading and unloading.
  • the quenching chamber is preferably arranged above the lock. This enables an essential further development of the invention, which consists in that the transport device with at least one spindle or the like Device is moved vertically and that the transport device such is designed so that the opening between the lock and quenching chamber locked during quenching.
  • a transport floor for the horizontal transport of the workpieces the lock is provided with the quenching chamber closed. This training Allows an operator to quench the workpiece during quenching Unloading the continuous furnace is possible.
  • the transport floor is preferably at a fixed distance from the transport device arranged.
  • the quenching chamber is designed to be pressure-tight and with at least a circulation fan.
  • the solution to the problem is that Workpieces in the lock essentially vertically into a quenching chamber are transported in which the workpieces are under increased pressure from below 10 bar can be quenched by means of recirculated cooling gas and that after expiration during the quenching period, the workpieces are transported into and out of the lock this can be removed.
  • Hydrogen is preferably used as the cooling gas.
  • the cooling gas advantageously turns into Flushed gas storage.
  • the rotary hearth furnace system shown in FIGS. 1 and 2 is used for hardening Workpieces 1, here gear parts used.
  • the gear parts 1 are on Batch carriers 2 (see FIG. 2), here stacked on grates.
  • the furnace system points a rotary hearth furnace 3 in ring channel design, in which the workpieces 1 under a reaction gas, here endogas are heat treated.
  • an insulated oven door 4 is provided for loading and unloading.
  • a lock 5 adjoins the furnace door 4 in a gas-tight manner which, as shown in FIG. 2, has an exit door 6.
  • a quenching chamber 7 which as a pressure chamber a water-cooled outer jacket.
  • the lock is with one Transport device 8 provided.
  • the transport device 8 in the lock 5 can in elevator mode by means of several spindles 9 or similar devices be moved vertically under the quenching chamber 7.
  • the transport device is designed so that this pressure-tight an opening 12 between Lock 5 and quench chamber 7, for example via so-called finger pins, not shown.
  • the quenching chamber 7 is connected to a pump station 13 and a gas intermediate store 14 connected for a cooling gas.
  • a gas intermediate store 14 connected for a cooling gas.
  • a heat exchanger 15 shown in FIG. 2 cools the cooling gas, while it is being circulated.
  • the transport floor at a fixed distance from it 16 arranged, the one when the quenching chamber 7 is closed Transport of the workpieces on the batch carriers under the quenching chamber allows.
  • the spindles 9 or similar drives of the transport device 8 arranged in four places laterally in the lock space 5, so that the Lock can be passed by a batch carrier.
  • the spindles 9 are equipped with a radiation shield, not shown, as heat protection.
  • the furnace door 4 of the rotary hearth furnace 3 opened and a batch carrier 2, for. B. a rust of a known cross pusher on the transport device of the lock encountered.
  • the transport device 8 is at the same level as that Stove of the rotary hearth furnace. As soon as the cross bumper has passed through the oven door, except for a residual dimension that allows the cross bumper to return, be lowered. After the cross pusher has left the lock the transport device 8 moved vertically under the quenching chamber 7. The transport device 8 closes the quenching chamber 7 in a gas-tight manner.
  • the closed cold quenching chamber will by means of the pump station 13 with a cooling gas, preferably hydrogen or Nitrogen, flooded and the workpieces at a pressure of less than 10 bar, preferably 9.5 bar, quenched by recirculating cooling gas.
  • the hydrogen becomes exhausted the cooling time for pressure equalization at the furnace pressure in the gas buffer 14 flooded and cached.
  • the cooling gas can be stored to use it multiple times as a cooling gas to finally use it To use incineration.
  • the cooling gas could also be used for manufacturing be used by Endogas for the continuous furnace or from the gas buffer be removed for heating purposes.
  • the quenching chamber 7 flushed with the reaction gas, here endogas.
  • the transport device 8 lowered and the workpieces 1 from the quenching chamber 7 transported into the lock 5.
  • the transport floor is located itself in the position shown in dashed lines in FIG. 2.
  • the exit door 6 of the Lock 5 is in a known manner with a burning gas curtain Mistake. It can be opened so early that the Transport device 8 arrives in the extension level when the exit door 6 has reached its open position.
  • a Drive the known grate extractor (not shown) onto the transport device 8 and pull the grate 2 out of the lock.
  • the workpieces 1 are over an unloading storage path 17 fed to a tempering furnace, not shown which can be followed by a cooling section.
  • the exit door 6 becomes the Lock locked and the lock 5 flushed with endogas.
  • the gas can be flushed into the intermediate gas storage 14.
  • the purging process uses a Flush, not shown, rinsed out.
  • the workpieces quenched with cooling gas under pressure have only a small number Delays on, which are also uniform.
  • the workpieces are washed unnecessary.
  • the flushing volume is low due to the elevator principle.
  • the quenching chamber can also be located below the lock become.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Tunnel Furnaces (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Furnace Charging Or Discharging (AREA)

Claims (10)

  1. Four continu pourvu d'un dispositif pour la trempe de pièces, où le dispositif se trouve en aval d'un sas pour la reprise des pièces et où en aval du sas (5) est disposée, de manière verticale, une chambre de trempe (7), raccordée à une station de pompage (13) pour un gaz de refroidissement, et où le sas est doté d'un dispositif de transport (8) qui transporte les pièces (1) entre le sas (5) et la chambre de trempe (7),
    caractérisé par le fait qu'une ouverture (12) pouvant être fermée et rendue étanche au gaz est disposée entre le sas (5) et la chambre de trempe (7), et que le dispositif de transport (8) est conçu de la sorte qu'il ferme l'ouverture (12) entre le sas (5) et la chambre de trempe (7) lors de la trempe.
  2. Four continu selon la revendication 1,
    caractérisé par le fait que la chambre de trempe (7) est disposée en amont du sas (5).
  3. Four continu selon l'une des revendications 1 ou 2,
    caractérisé par le fait que le dispositif de transport (8) est mû, de manière verticale, à l'aide d'au moins une tige (9) ou d'un moyen similaire.
  4. Four continu selon l'une des revendications 1 à 3,
    caractérisé par le fait qu'en aval du dispositif de transport (8) est prévu un plancher de transport (16) pour le transport horizontal des pièces (1) à travers du sas (5) quand la chambre de trempe (7) est fermée.
  5. Four continu selon la revendication 4,
    caractérisé par le fait que le plancher de transport (16) est disposé à une distance fixe du dispositif de transport (8).
  6. Four continu selon l'une des revendications 1 à 5
    caractérisé par le fait que la chambre de trempe (7) est conçue de la sorte qu'elle conserve la pression et qu'elle est dotée d'au moins un ventilateur de circulation (10).
  7. Procédé pour la trempe de pièces soumises à un traitement thermique continu sous atmosphère contrôlée dans un four continu et transférées du four continu vers un sas, en aval duquel est disposée une chambre de trempe pour la trempe sous gaz, les pièces étant transportées dans le sas (5) de manière essentiellement verticale vers une chambre de trempe (7) froide à l'aide d'un dispositif de transport (8),
    caractérisé par le fait que, lors du transport des pièces du sas (5) vers la chambre de trempe (7) à l'aide du dispositif de transport (8), la chambre de trempe (7) est fermée, que la chambre de trempe fermée est remplie de gaz de refroidissement et que les pièces sont trempées par du gaz de refroidissement circulé sous pression élevée restant en dessous de 10 bar, qu'à la fin du cycle de trempe la chambre de trempe (7) est balayée par l'atmosphère contrôlée utilisée dans le four continu et que les pièces sont transportées dans le sas (5) où elles sont ensuite reprises.
  8. Procédé selon la revendication 7,
    caractérisé par le fait que de l'hydrogène est utilisé comme gaz de refroidissement.
  9. Procédé selon la revendication 8,
    caractérisé par le fait qu'à la fin du cycle de trempe le gaz de refroidissement est évacué dans un réservoir de stockage intermédiaire de gaz (14).
  10. Procédé selon l'une des revendications 7 ou 8,
    caractérisé par le fait que le gaz de refroidissement issu du réservoir de stockage intermédiaire de gaz (14) est utilisé pour les besoins de chauffage ou pour la production d'atmosphère contrôlée.
EP00909114A 1999-01-29 2000-01-28 Four continu pourvu d'un dispositif pour la trempe de pieces et procede de trempe Expired - Lifetime EP1153146B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19903659 1999-01-29
DE19903659 1999-01-29
DE19919738 1999-04-30
DE19919738A DE19919738A1 (de) 1999-01-29 1999-04-30 Durchlaufofen mit einer Einrichtung zum Abschrecken von Werkstücken sowie Abschreckverfahren
PCT/EP2000/000654 WO2000044945A1 (fr) 1999-01-29 2000-01-28 Four continu pourvu d'un dispositif pour la trempe de pieces et procede de trempe

Publications (2)

Publication Number Publication Date
EP1153146A1 EP1153146A1 (fr) 2001-11-14
EP1153146B1 true EP1153146B1 (fr) 2002-08-07

Family

ID=26051582

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Application Number Title Priority Date Filing Date
EP00909114A Expired - Lifetime EP1153146B1 (fr) 1999-01-29 2000-01-28 Four continu pourvu d'un dispositif pour la trempe de pieces et procede de trempe

Country Status (3)

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EP (1) EP1153146B1 (fr)
AT (1) ATE221923T1 (fr)
WO (1) WO2000044945A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107058687B (zh) * 2017-04-10 2018-09-14 遵义顺峰汽车零部件制造有限公司 热处理零件冷却装置
CN112458250A (zh) * 2020-11-07 2021-03-09 常德市金晟科技有限公司 一种便于使用的机械加工用淬火设备
CN113430340A (zh) * 2021-06-07 2021-09-24 合肥科晶材料技术有限公司 一种可在空气中实现材料淬火实验的系统

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1181169A (en) * 1967-11-10 1970-02-11 Ass Elect Ind Improvements relating to Furnaces
FR2617953B2 (fr) * 1982-04-27 1989-11-03 Innovatique Sa Four a sole tournante pour le traitement thermique, thermochimique ou electrothermique de metaux sous atmosphere rarefiee ou controlee
DE3819803C1 (fr) * 1988-06-10 1989-12-14 Ulrich 5810 Witten De Wingens
DE3831910C2 (de) * 1988-09-20 1995-08-24 Schmetz Gmbh Durchziehofen für Langerzeugnisse
JP3640687B2 (ja) * 1994-09-05 2005-04-20 Ｎｔｎ株式会社 孔開扁平部品の焼入方法および装置
DE29717714U1 (de) * 1997-10-07 1997-11-13 Ipsen Ind Int Gmbh Vorrichtung zum Abschrecken von Chargen metallischer Werkstücke mit einem fluiden, insbesondere gasförmigen Medium bei einem vorgegebenen Abschreckdruck

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Publication number Publication date
EP1153146A1 (fr) 2001-11-14
WO2000044945A1 (fr) 2000-08-03
ATE221923T1 (de) 2002-08-15

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