EP0151700B1 - Four industriel, notamment four à vide à chambres multiples, pour le traitement thermique de charges de pièces métalliques - Google Patents

Four industriel, notamment four à vide à chambres multiples, pour le traitement thermique de charges de pièces métalliques Download PDF

Info

Publication number
EP0151700B1
EP0151700B1 EP84113445A EP84113445A EP0151700B1 EP 0151700 B1 EP0151700 B1 EP 0151700B1 EP 84113445 A EP84113445 A EP 84113445A EP 84113445 A EP84113445 A EP 84113445A EP 0151700 B1 EP0151700 B1 EP 0151700B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
cooling
charge
industrial furnace
batch
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
Application number
EP84113445A
Other languages
German (de)
English (en)
Other versions
EP0151700A2 (fr
EP0151700A3 (en
Inventor
Joachim Dr.-Ing. Wünning
Wilhelm Neubauer
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.)
Aichelin GmbH Germany
Original Assignee
Aichelin GmbH Germany
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 Aichelin GmbH Germany filed Critical Aichelin GmbH Germany
Priority to AT84113445T priority Critical patent/ATE35428T1/de
Publication of EP0151700A2 publication Critical patent/EP0151700A2/fr
Publication of EP0151700A3 publication Critical patent/EP0151700A3/de
Application granted granted Critical
Publication of EP0151700B1 publication Critical patent/EP0151700B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • 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
    • C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
    • 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 relates to an industrial furnace, in particular a multi-chamber vacuum furnace for the heat treatment of batches of metallic workpieces, with a heating chamber and a cooling chamber containing a cooling device acted upon with cooling gas, in which a heat-treated batch is flowed with cooling gas which is circulated via a heat exchanger, and optionally with a Oil bath.
  • Industrial furnaces of this type are used to a large extent for hardening steel parts, in particular all types of parts made of tool steels, as well as for various cooling processes and other heat treatments of metal parts.
  • An example of such an industrial furnace is described in DE-A-1 933 593.
  • This vacuum oven has a heating compartment and an adjoining cooling compartment.
  • the cooling compartment contains a cooling chamber housing which is open at the bottom and in which there is a bell-shaped partition. At the upper tapered opening there is a fan through which the cooling gas is to be circulated in the cooling chamber. Between the cooling chamber housing and the intermediate wall, a heat exchanger surrounding the intermediate wall is arranged over its entire longitudinal extent.
  • the interior of the cooling chamber housing to the cooling compartment is thereby closed off by the lifting device for the pallet.
  • an annular gap remains between the pallet and the lower edge of the partition.
  • the fan of the cooling chamber sucks the cooling gas up through the annular gap past the hot charge, from where it passes down again to the annular gap via the water-cooled heat exchanger. Since the opening for the fan has a smaller cross-section than the base area of the space surrounded by the intermediate wall, there is essentially a flow along a cone shell through the charge.
  • the object of the invention is therefore to provide an industrial furnace, in particular a multi-chamber vacuum furnace with a cooling chamber containing a gas cooling device, in which an optimal adaptation of the flow conditions of the respective batch to be cooled to the conditions of this batch is possible with simple means, without the need for expensive , expensive or difficult to use facilities would be required.
  • the industrial furnace mentioned at the outset has a nozzle box which is arranged in the cooling chamber and is supplied with cooling gas and in which at least one nozzle plate arranged opposite the batch is interchangeably used to change the blowing conditions of the batch.
  • the exchangeable nozzle plates differ by nozzles with different nozzle arrangements and / or with different nozzle diameters and / or with different distances from the batch.
  • the new industrial furnace only allows high cooling gas speeds to be generated in the cooling chamber by means of a corresponding nozzle plate arrangement and thus a corresponding selection of the nozzle arrangement, nozzle distribution and other nozzle characteristics at or within the batch to be cooled, where maximum cooling effect is required.
  • the design effort for the simple nozzle box with the interchangeable nozzle plates is low.
  • At least some nozzles of at least one nozzle plate are arranged in an orientation resulting in a baffle flow and / or a parallel flow of the cooling gas on the charge.
  • the maximum cooling speed of the batch depends on the heat transfer values achieved. It is known that the gas inflow of the charge has a decisive influence on the degree of heat transfer from the cooling gas / charge, with higher heat transfer values being achieved in the case of an impact flow than in the case of parallel flow, in which the cooling gas flows parallel to the workpiece surface.
  • Other parameters for heat transfer include Nozzle outlet speed, nozzle diameter, nozzle distance from the batch, distance between the nozzles, average cooling gas temperatures and average batch temperatures.
  • the nozzles are advantageously arranged surrounding the batch on several sides in the cooling chamber, which results in particularly simple structural conditions if the nozzle box has guide devices into which the respective nozzle plate can be inserted.
  • the above-described adaptation of the cooling device to the parameters mentioned for the heat transfer can be achieved in a very simple manner.
  • the individual, interchangeable nozzle plates can not only have different nozzle arrangements (nozzle images) and nozzle diameters, etc., but it can also have, for example, a nozzle plate projecting into or out of the interior of the cooling chamber, in order to reduce the distance between the nozzles and the Change batch according to the respective circumstances.
  • the heat-treated batch will be surrounded by nozzles on several sides, for which purpose the nozzle box is expediently tunnel-shaped and is delimited on its inner wall by at least one nozzle plate.
  • at least one gas-impermeable blind plate can be detachably used. In this way, an effective impingement flow can be achieved with plate-shaped workpieces by inserting lateral nozzle plates and a blind plate above the charge, so that the stationary workpiece can be optimally cooled from all sides.
  • only parallel flow can be used as through-flow cooling, because cooling by means of impingement flow is not possible due to the shape of the workpiece and the large number of workpieces.
  • a nozzle plate is inserted above and dummy plates on both sides of the batch.
  • the nozzle distance from the batch can then be optimized on each side by means of the nozzle plates already mentioned, with an area projecting into or out of the interior of the cooling chamber.
  • the nozzle box is delimited on at least three inner sides by nozzle plates, two of which are arranged opposite one another and the third nozzle plate is arranged between the other two nozzle plates.
  • a lifting and lowering device receiving the batch can be arranged in the cooling chamber, by means of which the batch can be brought into a predetermined distance from at least part of the nozzle orifices of at least one nozzle plate.
  • the nozzle plates are evenly charged with cooling gas, an equal exit speed is guaranteed at all nozzles of the respective nozzle plate, and thus a uniform cooling effect on the entire loaded batch area.
  • Such a uniform cooling effect is important to achieve a desired structural state in the batch to be cooled.
  • the cooling device is not located in the heating chamber, but in its own cooling chamber.
  • the cold batch environment in the cooling chamber not only exploits the convective heat transfer from the batch to the cooling gas, but also the heat dissipation by radiation, which helps in the upper temperature range in particular to increase the cooling effect.
  • the heating chamber, the heating elements and the batch hearth do not have to be cooled together with the batch after the heat treatment in the critical cooling range, so that the cooling capacity achieved on the batch is not reduced by the heat dissipation of the heating chamber device .
  • the cooling chamber separate from the heating chamber enables the described adaptability of the nozzle cooling device to the conditions of the respective batch, while on the other hand the heating chamber can be designed for optimum heating conditions regardless of the cooling of the batch required after the heat treatment.
  • the double-chamber vacuum furnace shown in FIGS. 1 to 4 has a double-walled, water-cooled housing 1, in the rear part of which a heating chamber 2 and in the front part of which a cooling chamber 3 are accommodated.
  • the essentially cylindrical housing 1 is closed on the front side by a water-cooled double-jacket door 4 which serves for loading and unloading the furnace and can be pivoted or pushed.
  • a double-walled swing door 5 is provided, which closes a housing opening available for assembly purposes.
  • a double-walled, water-cooled container 6 adjoins the housing 1 below the cooling chamber 3, which is flanged to the housing 1 and in which there is an oil bath, the level of which is indicated at 7.
  • the housing 1 In the front part of the cooling chamber 3, the housing 1 carries three radially projecting flanges 8 distributed around its circumference in the manner shown in FIG. 2, onto which double-walled, water-cooled hoods 9 are placed, each of which covers a fan drive unit 10 .
  • the heating chamber 2 which is essentially rectangular in cross section, is constructed in a lightweight steel construction and is lined with a multi-layer insulation made of high-quality ceramic fiber material and the purest graphite felt.
  • Large-area graphite heating elements 12 are arranged on both sides and above the batch indicated at 11. This all-round arrangement of the graphite heating elements 12 ensures rapid and uniform heating of the batch 11.
  • the current supply of the graphite heating elements 11 takes place via heating element connecting bolts 13 and one heating element connecting flange 14 in each case.
  • the batch 11 is located in the heating chamber 2 on a stove 15, which can be raised and lowered for transport purposes.
  • the end wall of the heating chamber 2 adjoining the cooling chamber 3 is closed by a horizontally movable heating chamber door 16.
  • the heating chamber 2 is optimally designed for the lowest possible storage heat and for heat treatment according to a preselected temperature program. Compared to single-chamber furnaces, neither the cooling gas flow and cooling gas speed nor other parameters for heat dissipation from the batch need to be taken into account.
  • the cooling chamber 3 which is arranged approximately coaxially to the heating chamber 2, contains a cooling device 17 which has a nozzle box 18 which is tunnel-shaped with an essentially U-shaped cross section and a heat-treated batch 11a to be cooled in the manner shown in FIG. 3 above and covering on both sides.
  • the nozzle box 18 carries on the open inner sides pointing towards the batch 11a in pairs mutually associated side guide grooves 19 into which the nozzle plates 20, 20a or blind plates 21 are optionally inserted interchangeably, as will be explained with reference to FIGS. 5 to 18.
  • the nozzle box 18 is directly connected to three fan housings 22, each of which contains a high-performance fan wheel 23, which sits directly on the shaft end of the associated drive motor 10, the vacuum-tight current feedthroughs of which are indicated at 24.
  • the suction opening of each fan housing 22 is preceded laterally by two heat exchangers 25, which are supplied with cooling water via vacuum-tight feed and discharge ducts and to which gas guide plates 26 are assigned.
  • three fan housings 22 and three associated fan units 10, 23 are provided. Embodiments are also conceivable in which only two fan housings 22 or also a single fan housing 22 are or are present.
  • the oil bath contained in the container 6 can be circulated evenly and vigorously by a hydraulic oil circulator 27, the speed of rotation of the oil circulator 27 being adjustable as required.
  • An oil bath heater 28 allows the vacuum quenching oil to be brought to the desired temperature and to be kept at this temperature.
  • a lifting and lowering platform 29 is arranged, which makes it possible to bring a heat-treated batch 11 a coming from the heating chamber 2 in the cooling chamber 3 to a certain height with respect to the nozzle box 18 - as will be explained in more detail below - Or immerse the batch 11 a in the quenching oil contained in the container 6.
  • the container 6 with the oil bath contained therein is dispensed with.
  • the double-chamber vacuum oven can be charged manually or automatically, the batch 11 being automatically moved into the open heating chamber 2.
  • the heating chamber door 16 and the door 4 closing the loading opening are then closed, whereupon the vacuum furnace is evacuated.
  • the batch 11 is then heat-treated in the heating chamber 2 according to a preselected temperature program.
  • the vacuum furnace is filled with inert gas under a maximum pressure of 6 bar abs. fumigated again.
  • the fan drive motors 10 are switched on.
  • the heating elements 12 are switched off and the batch 11 is moved into the cooling chamber 3, where it takes the place of the batch 11a and is quenched with cooling gas.
  • the charge in the cooling chamber 3 can be moved up to the nozzle plate 20 of the nozzle box 18 located above as required.
  • the batch 11 is to be quenched in oil after the heat treatment in the heating chamber 2, it is lowered into the oil bath after it has been moved out of the heating chamber 2 by means of the lifting and lowering platform 29. If necessary, you can pre-cool briefly with inert gas before quenching the oil.
  • the double chamber vacuum furnace is controlled automatically; the complete heat treatment cycle can be selected.
  • the nozzle box 18 is designed so that only low gas speeds occur in it, which on the one hand cause only small flow losses and on the other hand create the same pressure conditions at the nozzles of the nozzle plates 20, 20a, which lead to the same nozzle outlet speeds, which are the prerequisite for uniform cooling of the batch 11 are.
  • the quenching conditions in the cooling chamber 3 can be optimally adapted to the shape and composition of each batch 1a. This is illustrated by way of example in FIGS. 5 to 18:
  • the batch 11 a to be quenched consists of a number of slim, cylindrical tools, for example twist drills or milling cutters, with a diameter of 45 mm ⁇ 300 mm.
  • the cylindrical workpieces designated with 30 are charged standing, whereby they are evenly distributed on the base of the batch.
  • the base area of the batch corresponds to the rectangular outline area of the nozzle plate 20 shown in FIG. 6.
  • a horizontal nozzle plate 20 is inserted into the nozzle box 18 above the charge 11a, while blind plates 21 are attached to the side of the charge 11a.
  • the nozzle plate 20 carries nozzle openings 35 (FIG. 6) which are uniformly distributed over its entire surface and which ensure uniform and simultaneous cooling of all workpieces 30.
  • the distance between the nozzle openings 35 and the batch 11a has been optimized by lifting by means of the lifting and lowering platform 29.
  • the overstroke is indicated at 32 in FIG. 5.
  • the batch 11 a consists only of a workpiece 33 in the form of a cylindrical mandrel. Since this mandrel has a relatively small inflow area in comparison to the batch base area given by the rectangular outline of the nozzle plate 20a of FIG. 8, a cooling gas flow concentration in the region of the workpiece 33 to be cooled is necessary in order to achieve maximum cooling speeds. This requirement can be achieved either by reducing the number of nozzle openings 35 while simultaneously increasing the nozzle outlet speed, or with a constant number of nozzles by reducing the nozzle spacing 36 (FIG. 8).
  • a nozzle plate 20a is inserted in the nozzle box 18 above the charge 11, which has a region 40 projecting into the interior of the cooling chamber 3, in which the nozzle openings 35 are arranged.
  • the nozzle plate 20a thereby has a channel-like or box-like shape; the area containing the nozzle openings 35 is delimited on both sides by an unperforated area 41.
  • the nozzle pattern is determined in the manner shown in FIG. 18 by nozzle bores 35 of the same diameter arranged in a rectangular pattern with the same height and lateral spacings.
  • dummy plates 21 are inserted in the nozzle box 18 in order to prevent opposing cooling gas flows colliding against one another in the vicinity of the workpiece because this would substantially reduce the cooling gas velocity directly on the workpiece 33.
  • the batch 11 from a heavy, compact tool, for example a cylindrical die, which in comparison to the batch base area given by the rectangular outline shape of the nozzle plate 20 (FIG. 10) has a small projecting inflow area.
  • the most effective cooling results from a combination of impingement cooling of the upper flat surface on the one hand and a parallel flow on the cylindrical lateral surface or the bores of the workpiece 33 on the other hand, while two blind plates 21 are inserted in the nozzle box 18 on the side of the workpiece 33.
  • the nozzle pattern of the upper nozzle plate 20 is approximately diamond-shaped, again all the nozzle openings 35 having the same height and side distances 36.
  • the workpiece 33 is moved to the upper nozzle plate 20 by means of the lifting and lowering platform 29 in the cooling chamber 3, as is indicated at 32.
  • a batch 11 a is illustrated, which consists of several cylindrical stamps 33.
  • two blind plates 21 are inserted in the nozzle box 18 to the side of the charge 11, while a nozzle plate 20 is provided above the charge 11, the nozzle image of which can be seen in FIG. 12:
  • the nozzle openings 35 are each arranged in rectangular groups corresponding to the stamps 33, which are separated from one another by gas-impermeable intermediate spaces 34.
  • the side and height spacing 36 of adjacent nozzle openings 35 is the same again.
  • the batch 11a can be brought to the nozzle plate 20 through the lifting and lowering platform 29, as is indicated at 32 in FIG. 11; however, it is also conceivable to quench the charge 11a at a greater distance from the upper nozzle plate 20, which is illustrated in broken lines.
  • FIGS. 13, 14 A typical example of a batch 11 quenched by intensive impingement cooling is illustrated in FIGS. 13, 14. Above the batch 11 consisting of two plate-shaped workpieces 33, for example in the form of a die-casting mold, a blind plate 21 is arranged in the nozzle box 18, while two nozzle plates 20a are provided to the side of the upright standing plate-shaped workpieces 33, which are shown in FIG. 13 Have a region 40 projecting into the cooling chamber 3, in which the nozzle openings 35 are arranged.
  • the plate-shaped workpieces 33 are vertical to avoid distortion in the upper temperature range during the dwell time in the heating chamber 2 in the vacuum oven.
  • the nozzle openings 35 of the box-like nozzle plates 20a are brought close to the batch side surface, the nozzle openings 35 being arranged, according to the nozzle image shown in FIG. 14, uniformly distributed over the entire batch side surface with equal height and side spacings 36, in order thereby to ensure uniform and simultaneous cooling of the Ensure workpieces 33.
  • a single plate-shaped workpiece 33 for example in the form of a compression mold, is quenched in the cooling chamber 3, which - similar to FIG. 13 - with an overhead blind plate 21 and two lateral box or trough-like nozzle plates 20a is equipped.
  • the nozzle plates 20a are designed in the manner shown in FIG. 16 with a nozzle pattern which is matched to the side face of the batch:
  • the nozzle openings 35 which have the same height and side spacing 36, are concentrated on a rectangular region approximately corresponding to the batch side surface, which is surrounded by gas-impermeable regions 41.
  • the resulting reduction in the number of nozzle openings 35 results in an increase in the nozzle outlet speed.
  • the distance of the nozzle openings 35 from the workpiece or batch side surface is optimized in the described manner by using the nozzle plates 20a. The impingement flow applied to the workpiece on both sides guarantees a distortion-free and intensive cooling of the batch 11a.
  • a nozzle plate 20 is arranged in the nozzle box 18 above the batch 11 consisting of three workpieces 33, while dummy plates 21 are inserted on the side of the batch 11a.
  • the nozzle openings 35 - as can be seen from FIG. 17 - are again combined according to the three workpieces 33 into three adjacent, rectangularly delimited groups, between which gas-impermeable areas 41 are arranged.
  • the charge 11 a is brought up to the upper nozzle plate 20 by the lifting and lowering platform 29, as indicated at 32.
  • nozzle openings 35 of the same diameter are provided in the nozzle plates 20, 20a in different nozzle patterns.
  • the nozzle plates 20a instead of one in the cooling chamber 3 inwardly projecting part 40 have an outwardly projecting area, while for special cases the arrangement can also be such that a nozzle plate is present in the area of the batch base in order to allow the flow of the batch 11 from below.
  • the drive motors 10 of the fans can be designed to be controllable in order to be able to select the cooling gas speed in the cooling chamber 3 in accordance with the requirements.
  • the maximum cooling gas pressure is usually 2 bar abs. If necessary, it can also be higher.
  • cooling intensities are achieved in the cooling chamber, which correspond to those of conventional and commercially available vacuum furnaces with high-pressure gas quenching.
  • Conventional vacuum furnaces (predominantly single-chamber furnaces) must, for example, with 5 bar abs. Cooling gas pressure work in order to achieve a cooling effect comparable to that of the new industrial furnace in the cooling chamber 3 even at a cooling gas pressure of 2 bar abs. is obtained.
  • the decisive advantage of the low cooling gas pressures that can thus be achieved is a substantial saving of cooling gas (in particular nitrogen) during a heat treatment cycle, which means a correspondingly high cost saving.
  • low cooling gas pressures allow the production of cost-effective system housings that are not subject to official approval.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Furnace Details (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Joints Allowing Movement (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)

Claims (10)

1. Four industriel (1), notamment four à vide à plusieurs chambres destiné au traitement thermique de charges (11, 12) de pièces métalliques, avec une chambre de chauffe (2), avec une chambre de refroidissement (3) qui contient un dispositif de refroidissement (17) alimentée en gaz de refroidissement et dans laquelle une charge (11,11a) ayant subi le traitement thermique est soumise à l'action d'un gaz de refroidissement passant dans un circuit contenant un échangeur de chaleur (25) et, le cas échéant, avec un bain d'huile (6), caractérisé en ce que le dispositif de refroidissement (17) comporte un caisson à tuyères (18) qui est disposé dans la chambre de refroidissement (3) et alimenté en gaz de refroidissement et dans lequel au moins une tôle à tuyères (20, 20a), disposée en regard de la charge (11a) est montéé de façon interchangeable, aux fins de modification des conditions de soufflage du gaz sur la charge (11a).
2. Four industriel selon la revendication 1, caractérisé en ce que les tôles à tuyères (20; 20a) interchangeables diffèrent entre elles par des dispositions différentes des tuyères (dessin d'implantation des tuyères) et/ou par des diamètres différents des tuyères et/ou par des distances différentes par rapport à la charge.
3. Four industriel selon la revendication 1 ou 2, caractérisé en ce qu'au moins certaines tuyères (35) d'au moins une tôle à tuyères sont disposées de manière qui produit un écoulement du gaz de refroidissement heurtant contre et/ou derigé parallèlement à la charge (11a).
4. Four industriel selon une des revendications qui précèdent, caractérisé en ce que les tuyères des tôles à tuyères (20, 21) sont disposées en entourant la charge (11a) sur plusieurs côtés.
5. Four industriel selon une des revendications qui précèdent caractérisé en ce que le caisson à tuyères (18) présente des dispositifs de guidage (19) dans lesquels la tôle à tuyères (20, 20a) peut être engagée.
6. Four industriel selon la revendication 5, caractérisé en ce que la tôle à tuyères (20a) présente une partie (40) faisant saillie dans ou hors de l'espace intérieur de la chambre de refroidissement (3).
7. Four industriel selon une des revendications qui précèdent, caractérisé en ce que le caisson à tuyères (48) est constitué en forme de tunnel et est délimité sur sa paroi intérieure par au moins une tôle à tuyères (20, 20a).
8. Four industriel selon une des revendications qui précèdent, caractérisé en ce que dans le caisson à tuyères (18) est montée de façon amovible en plus de la tôle à tuyères (20, 20a), au moins une tôle pleine (21) imperméable au gaz.
9. Four industriel selon une des revendications qui précèdent, caractérisée en ce que le caisson à tuyères (18) est délimité sur au moins trois faces intérieures (20, 20a) par des tôles à tuyères, dont deux sont disposées mutuellement en regard et la troisième est disposée entre les deux autres tôles à tuyères.
10. Four industriel selon une des revendications qui précèdent, caractérisé en ce qu'il est disposé dans la chambre de refroidissement (3) un dispositif de levage et d'abaissement (29) qui supporte la charge (11a) et au moyen duquel la charge peut être amenée à une distance prédéterminée d'au moins une partie des embouchures des tuyères d'au moins une tôle à tuyères (20, 20a).
EP84113445A 1984-02-15 1984-11-07 Four industriel, notamment four à vide à chambres multiples, pour le traitement thermique de charges de pièces métalliques Expired EP0151700B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84113445T ATE35428T1 (de) 1984-02-15 1984-11-07 Industrieofen, insbesondere mehrkammer-vakuumofen zur waermebehandlung von chargen metallischer werkstuecke.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3405244 1984-02-15
DE3405244A DE3405244C1 (de) 1984-02-15 1984-02-15 Industrieofen,insbesondere Mehrkammer-Vakuumofen zur Waermebehandlung von Chargen metallischer Werkstuecke

Publications (3)

Publication Number Publication Date
EP0151700A2 EP0151700A2 (fr) 1985-08-21
EP0151700A3 EP0151700A3 (en) 1985-12-27
EP0151700B1 true EP0151700B1 (fr) 1988-06-29

Family

ID=6227686

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84113445A Expired EP0151700B1 (fr) 1984-02-15 1984-11-07 Four industriel, notamment four à vide à chambres multiples, pour le traitement thermique de charges de pièces métalliques

Country Status (11)

Country Link
US (1) US4653732A (fr)
EP (1) EP0151700B1 (fr)
JP (1) JPS60184625A (fr)
AT (1) ATE35428T1 (fr)
CS (1) CS264117B2 (fr)
DD (1) DD231375A5 (fr)
DE (1) DE3405244C1 (fr)
HU (1) HU202598B (fr)
PL (1) PL140026B1 (fr)
SU (1) SU1386047A3 (fr)
YU (1) YU43395B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019204869A1 (de) * 2019-04-05 2020-10-08 Audi Ag Abschreckvorrichtung zur chargenweisen Abschreckkühlung von Metallbauteilen
DE102019006201A1 (de) * 2019-05-09 2020-11-12 Aerospace Transmission Technologies GmbH Verfahren und Fixturhärtevorrichtung zum Fixturhärten von Bauteilen
DE102019128267A1 (de) * 2019-10-21 2021-04-22 Audi Ag Abschreckvorrichtung zum chargenweisen Abschrecken von Metallbauteilen und bevorzugte Verwendung

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4735883A (en) * 1985-04-06 1988-04-05 Canon Kabushiki Kaisha Surface treated metal member, preparation method thereof and photoconductive member by use thereof
DE3934103A1 (de) * 1989-10-12 1991-04-25 Ipsen Ind Int Gmbh Ofen zur partiellen waermebehandlung von werkzeugen
DE4208485C2 (de) * 1992-03-17 1997-09-04 Wuenning Joachim Verfahren und Vorrichtung zum Abschrecken metallischer Werkstücke
ES2141791T3 (es) * 1993-09-20 2000-04-01 Peacock Llc Horno para calentar o fundir protesis dentales.
DE4419332A1 (de) * 1994-06-02 1995-12-14 Wuenning Joachim Industriebrenner mit geringer NO¶x¶-Emission
US5419792A (en) * 1994-07-25 1995-05-30 General Electric Company Method and apparatus for cooling a workpiece
US5876118A (en) * 1995-12-08 1999-03-02 The Perkin-Elmer Corporation Calorimeter having rapid cooling of a heating vessel therein
DE19845805C1 (de) * 1998-09-30 2000-04-27 Tacr Turbine Airfoil Coating A Verfahren und Behandlungseinrichtung zum Abkühlen von hocherwärmten Metallbauteilen
EP1154024B1 (fr) * 2000-04-14 2004-03-24 Ipsen International GmbH Procédé et dispositif pour le traitement thermique de pièces métalliques
US6492631B2 (en) * 2000-04-27 2002-12-10 Kabushiki Kaisha Toshiba Apparatus for quenching metallic material
US6394793B1 (en) 2001-01-13 2002-05-28 Ladish Company, Incorporated Method and apparatus of cooling heat-treated work pieces
US20030098106A1 (en) * 2001-11-29 2003-05-29 United Technologies Corporation Method and apparatus for heat treating material
US6902635B2 (en) 2001-12-26 2005-06-07 Nitrex Metal Inc. Multi-cell thermal processing unit
US7150627B2 (en) * 2005-04-30 2006-12-19 Siddhartha Gaur Transported material heating with controlled atmosphere
JP2009287085A (ja) * 2008-05-29 2009-12-10 Ihi Corp 熱処理装置および熱処理方法
DE202008010215U1 (de) 2008-07-31 2008-10-09 Ipsen International Gmbh Industrieofen wie Mehrkammer-Vakuumofen, insbesondere Zweikammer-Vakuumofen zur Wärmebehandlung von Chargen metallischer Werkstücke
DE102009041041B4 (de) * 2009-09-10 2011-07-14 ALD Vacuum Technologies GmbH, 63450 Verfahren und Vorrichtung zum Härten von Werkstücken, sowie nach dem Verfahren gehärtete Werkstücke
US10196730B2 (en) * 2009-09-10 2019-02-05 Ald Vacuum Technologies Gmbh Method and device for hardening workpieces, and workpieces hardened according to the method
US9995481B2 (en) 2011-12-20 2018-06-12 Eclipse, Inc. Method and apparatus for a dual mode burner yielding low NOx emission
US9310132B1 (en) 2012-02-08 2016-04-12 Carbonyx, Inc. Replaceable insulation roof for industrial oven
US9242313B2 (en) 2012-07-30 2016-01-26 General Electric Company Welding furnace and viewport assembly
FR3001229B1 (fr) * 2013-01-23 2015-10-30 Ecm Technologies Cellule de trempe sous gaz
WO2014130150A1 (fr) * 2013-02-20 2014-08-28 Rolls-Royce Corporation Élément de paroi pouvant être utilisé pour la trempe
CN104913630A (zh) * 2014-02-19 2015-09-16 南京三超新材料股份有限公司 保护气氛速冷烧结炉
SE543318C2 (en) * 2018-06-21 2020-11-24 Mats Olsson Method and system for cooling hot objects
CN115478137A (zh) * 2022-09-19 2022-12-16 常州市汇丰天元热处理有限公司 一种高屈服度钢材用全自动高温叉车式淬火设备

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE863070C (de) * 1951-04-22 1953-01-15 Ofu Ofenbau Union G M B H Verfahren und Vorrichtung zum Abschrecken von Stahlgegenstaenden mittels gasfoermiger Medien
FR1153262A (fr) * 1955-09-13 1958-03-04 Perfectionnements aux fours
DE1219058B (de) * 1962-06-26 1966-06-16 Deutsche Edelstahlwerke Ag Abschreckbrause
DE1933593A1 (de) * 1969-07-02 1971-01-28 Ugine Infra Vorrichtung zur thermischen Behandlung
US4171126A (en) * 1978-03-13 1979-10-16 Midland-Ross Corporation Vacuum furnace with cooling means
DE2839807C2 (de) * 1978-09-13 1986-04-17 Degussa Ag, 6000 Frankfurt Vakuumofen mit Gaskühleinrichtung
JPS5569055A (en) * 1978-11-20 1980-05-24 Toyobo Co Ltd Temperature control mechanism of automatic analyzer
PL129105B1 (en) * 1979-12-05 1984-03-31 Lubuskie Zaklady Termotech Single-chamber vacuum furnace with pressure type cahrge cooling system utilizing gas as a cooling medium
JPS5721666U (fr) * 1980-07-15 1982-02-04
JPS57108218A (en) * 1980-12-25 1982-07-06 Shimadzu Corp Gas cooler in vacuum hardening furnace
DE3208574A1 (de) * 1982-03-10 1983-09-22 Schmetz Industrieofenbau und Vakuum-Hartlöttechnik KG, 5750 Menden "vakuum-schachtofen"
DE3215509A1 (de) * 1982-04-26 1983-10-27 Schmetz Industrieofenbau und Vakuum-Hartlöttechnik KG, 5750 Menden Vakuum-kammerofen
DE3224971A1 (de) * 1982-07-03 1984-01-05 Schmetz Industrieofenbau und Vakuum-Hartlöttechnik KG, 5750 Menden Vakuum-schachtofen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019204869A1 (de) * 2019-04-05 2020-10-08 Audi Ag Abschreckvorrichtung zur chargenweisen Abschreckkühlung von Metallbauteilen
DE102019006201A1 (de) * 2019-05-09 2020-11-12 Aerospace Transmission Technologies GmbH Verfahren und Fixturhärtevorrichtung zum Fixturhärten von Bauteilen
DE102019128267A1 (de) * 2019-10-21 2021-04-22 Audi Ag Abschreckvorrichtung zum chargenweisen Abschrecken von Metallbauteilen und bevorzugte Verwendung

Also Published As

Publication number Publication date
YU224884A (en) 1987-06-30
PL140026B1 (en) 1987-03-31
EP0151700A2 (fr) 1985-08-21
HUT43651A (en) 1987-11-30
EP0151700A3 (en) 1985-12-27
CS105585A2 (en) 1988-09-16
DD231375A5 (de) 1985-12-24
JPH0549724B2 (fr) 1993-07-27
CS264117B2 (en) 1989-06-13
SU1386047A3 (ru) 1988-03-30
JPS60184625A (ja) 1985-09-20
YU43395B (en) 1989-06-30
US4653732A (en) 1987-03-31
DE3405244C1 (de) 1985-04-11
HU202598B (en) 1991-03-28
ATE35428T1 (de) 1988-07-15
PL250866A1 (en) 1985-08-27

Similar Documents

Publication Publication Date Title
EP0151700B1 (fr) Four industriel, notamment four à vide à chambres multiples, pour le traitement thermique de charges de pièces métalliques
DE4110114C2 (fr)
DE102007012180B3 (de) Verfahren zur Wärmebehandlung von Halbzeugen aus Metall
EP0422353A2 (fr) Four pour le traitement thermique partiel d'outils
DE3346884A1 (de) Industrieofen zur waermebehandlung metallischer werkstuecke
EP0129701B1 (fr) Dispositif pour le refroidissement d'une charge, en particulier de pièces métalliques
EP3110981B1 (fr) Procédé et installation de traitement thermique d'un produit métallique plat étiré en longueur, notamment de barres de laminage en aluminium, dans un four à sole annulaire
DE3215509C2 (fr)
EP1154024B1 (fr) Procédé et dispositif pour le traitement thermique de pièces métalliques
DE19747018A1 (de) Vorrichtung zur Wärmebehandlung von Werkstücken
DE3819803C1 (fr)
DE2501360B2 (de) Vakuum-Atmosphärenofen zur Wärmebehandlung von Werkstücken
DE19628383A1 (de) Ofen zur Wärmebehandlung von Chargen metallischer Werkstücke
DE102007023703A1 (de) Verfahren zur Schnellkühlung einer Heiß Isostatischen Presse und eine Heiß Isostatische Presse
WO2012037905A1 (fr) Procédé et dispositif destinés à guider un écoulement dans des fours industriels pour le traitement thermique de matériaux/pièces métalliques
EP3978854B1 (fr) Four à tunnel destiné au traitement thermique des produits, procédé de fonctionnement d'un tel four à tunnel et utilisation d'un tel four à tunnel
EP1294512B1 (fr) Procede et dispositif pour le frittage de pieces frittees a base d'aluminium
EP0483596B1 (fr) Four à vide pour le traitement thermique de pièces métalliques
DE3209245A1 (de) Drehherdofen
DE2512485A1 (de) Verfahren zum brennen von keramischen produkten in einem diskontinuierlichen ofen, sowie brennofen zur durchfuehrung des verfahrens
DE10038782C1 (de) Verfahren und Vorrichtung zum Abkühlen, insbesondere zum Abschrecken und Härten von metallischen Werkstücken
DE69733820T2 (de) Heizverfahren und heizeinrichtung
DE102007038991A1 (de) Drehherdofen zur Wärmebehandlung von Werkstücken
AT390322B (de) Vorrichtung zum durchwaermen von stahlteilen
DE102005022242B4 (de) Anlage zur Entbinderung/Restentbinderung und Sinterung

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

AK Designated contracting states

Designated state(s): AT FR GB IT SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): AT FR GB IT SE

17P Request for examination filed

Effective date: 19860311

17Q First examination report despatched

Effective date: 19870309

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT FR GB IT SE

REF Corresponds to:

Ref document number: 35428

Country of ref document: AT

Date of ref document: 19880715

Kind code of ref document: T

ITF It: translation for a ep patent filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ET Fr: translation filed
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
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19920925

Year of fee payment: 9

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

Ref country code: FR

Payment date: 19920930

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: 19921117

Year of fee payment: 9

ITTA It: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19931107

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

Ref country code: SE

Effective date: 19931108

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

Ref country code: AT

Payment date: 19931112

Year of fee payment: 10

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

Effective date: 19931107

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

Ref country code: FR

Effective date: 19940729

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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

Ref country code: AT

Effective date: 19941107

EUG Se: european patent has lapsed

Ref document number: 84113445.5

Effective date: 19940610