EP1193317B1 - Installation pour le traitement thermique de charges de pièces métalliques - Google Patents
Installation pour le traitement thermique de charges de pièces métalliques Download PDFInfo
- Publication number
- EP1193317B1 EP1193317B1 EP00203331A EP00203331A EP1193317B1 EP 1193317 B1 EP1193317 B1 EP 1193317B1 EP 00203331 A EP00203331 A EP 00203331A EP 00203331 A EP00203331 A EP 00203331A EP 1193317 B1 EP1193317 B1 EP 1193317B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- load
- installation according
- tunnel
- installation
- loads
- 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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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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
-
- 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
-
- 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
- F27B19/00—Combinations of furnaces of kinds not covered by a single preceding main group
- F27B19/02—Combinations of furnaces of kinds not covered by a single preceding main group combined in one structure
-
- 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
Definitions
- the first type includes the so-called batch furnaces which comprise a treatment furnace and a quench tank, generally oil.
- the load of the parts processed in the oven is transferred above the quenching tank through a cell, and then immersed in the quenching fluid by means of an elevator placed inside the quenching tank. .
- the main disadvantages of this type of installation are as follows: on the one hand, the pair furnace-quenching tank is fixed and it is not possible to have several furnaces serving the same quenching tank, or a furnace serving several quenching or cooling tanks; on the other hand, for large loads, of the order of 1 m 3 , the temperature homogeneity is poor (deviations of +/- 10 ° C) because the heating is distributed only on two sides of the load parallelepipedic because of the means of mechanization including including side doors.
- the second type includes bell furnace installations multi-treatments, which allow the direct transfer of the load of the treatment furnace in the quenching tank without the need for an intermediate cell. Mechanization is typically by moving the oven (s) above the quenching tank (s) required, or vice versa, as can be seen in particular in patent applications EP 785 402 and EP 995 805.
- the third type includes various facilities with sets ovens and bins and mechanical means for moving the load or loads between these elements, for example by means of a carriage provided with a closed enclosure according to DE 30 31 660.
- a carriage provided with a closed enclosure according to DE 30 31 660.
- the structure of this known installation has several disadvantages: vertical space very important, because of its three levels to which is added the upper clearance required for the entry and exit of rooms; disposition buried elevators; heavy structure to support ovens at height; heavy mechanism to block and support the plug carrying the coin in each treatment element. This results in a high construction cost.
- An object of the invention is to have a heat treatment plant which allows to optimize to a large extent the parameters or constraints following.
- the installation must make it possible to associate one or more ovens and one or more quenching tanks or cooling and carry out charge transfers freely between these elements.
- the installation must allow on the same basis to integrate different types of ovens known to date (with temperatures ranging from up to 1300 ° C) and different types of quenching or cooling means (water, oil, molten salts, fluidized baths, gases, etc.).
- the installation must be capable of incorporating furnaces any configurations of the temperature tolerances of +/- 5 ° C at worst, so as to meet current requirements for quality of treatment.
- the installation must be able to include quenching or cooling tanks without integrated lifts, to reduce the cost of manufacture and have a more great freedom of construction.
- the installation must be able to handle loads of several tonnes without difficulties and without additional cost other than the conventional sizing of organs.
- the installation must be able to be installed in integrated workshops, that is to say that all the effluents from the installation must be able to be captured and channeled in a operators are not hampered by releases of vapors or flames.
- the installation must be able to handle heavy loads (from 1 to several tons) and large volumes (up to several m 3 ).
- the installation must be economical, of simple construction and easily automatable using a PLC.
- an installation according to the invention is of the type defined in the claim 1.
- the heat treatment plant illustrated in FIGS. 1 and 2 comprises two juxtaposed processing elements, namely a furnace 1 and a quenching cell 2 to liquid.
- An inlet and outlet airlock 3 is arranged in the alignment of the elements 1 and 2 and rests like them on a horizontal floor 4 which supports the installation.
- These three elements are arranged to each receive a load of metal parts 5 to treat. They are surmounted by a transfer tunnel intended to pass the loads 5 from one to the other without exposing the load or the interior of treatment elements 1 and 2 to the outside atmosphere.
- the tunnel 6 comprises a sealed envelope 7 and contains load handling means, including a carriage 8 provided lifting means and able to move along a horizontal path 9 to place selectively above each of items 1 to 3.
- Each load 5 of parts includes a support frame of the parts, to which the lifting means can hang in a way that will be described later. In Figures 1 to 3, it shows only the lower plate 11 and a suspension member 12 of this chassis.
- a load 5 can typically have a shape cylindrical about 1 m in diameter and 2 m in height, for a weight of about 2000 kg. Other dimensions are obviously possible.
- the treatment furnace 1 is here a pot furnace, that is to say that it contains a pot metal 14 forming an enclosure around the load 5.
- the pot is surrounded of electric heating elements 15 surrounded by an insulating enclosure 16.
- the bottom of the oven contains a stirring assembly 17 constituted by a fan rotor 18 actuated by an electric motor 19.
- the circulation of gases is ensured by walls of flow control 20.
- the pot is closed at its base by a removable plate 21 and its upper edge is fixed to the enclosure 16 by means of support members represented.
- the load 5 rests on supports 22 arranged in the lower part from the oven. It is conceivable that these supports are integral with the pot 14 or the closing plate 21.
- the load 5 is suspended on supports placed in the upper part of the pot 14.
- the upper opening of the oven is closed tightly by a movable cap 24 preferably pivotally mounted about an axis 25, of to open and close while remaining within the volume defined by the oven 1 and the transfer tunnel 6.
- the oven 1 is connected in a sealed manner to the tunnel of transfer 6, for example by means of a flange 26. It is also possible to provide a flexible collar to accommodate expansion between the oven and the tunnel.
- the transfer tunnel 6 is in the form of a cylindrical tube or cuboid.
- Lifting means incorporated in the industrial truck 8 to lift and lower the load 5 into the treatment elements 1 and 2 and the 3 may include a conventional mechanism, for example a winch 28, a deformable parallelogram or chain, and be powered by an engine electric or pneumatic or hydraulic cylinders. These lifting means carry a gripping device 30 arranged to cooperate with the fastening member 12 of the charge.
- the horizontal displacement of the carriage 8 on the track 9 is carried out by conventional drive means, for example a rack and an engine electric step by step.
- the gripping device 30 equipping the carriage 8 makes it possible to take the load 5 in any of the stations of the installation, carry it suspended and the drop off at another station.
- Its actuation can be electric, pneumatic or hydraulic. It can be realized in different ways to cooperate with the fastening members 12 of the frame supporting the load 5, for example a clamp axially grasping a pin disposed on the load, a locking mechanism of the bayonet type by angular rotation of the gripping device 30, a mechanism to ratchets, etc. A particularly advantageous embodiment will be described below. of the gripper 30 with reference to Figures 4 and 5.
- the truck can be equipped with screens 31 which laterally surround the load 5 to limit the loss of radiation temperature when transferring the charge from oven 1 to the cell quenching 2.
- the quenching cell 2 shown in FIG. 1 comprises an open tray 32 upward and containing the quench liquid, a support 33 on which the load 5 is placed, and a device 34 for agitating the quenching liquid, comprising a propeller driven by a submerged electric motor 35.
- the circulation of the liquid is driven by guiding walls 36. It is of course possible to envisage other devices agitation of the quench medium, such as for example circulation pumps or remote propellers.
- the quenching cell 2 is typically equipped with a heat exchanger (not shown) for cooling the quench liquid, heating means (not shown) such as electric heating bodies immersed in the liquid, level detectors and / or level compensation, a quick drain valve, etc. It should be noted that all aforementioned members are advantageously close to the ground 4. Moreover, depending on the nature and the temperature of the quenching liquid, the tank 32 can be isolated thermally.
- the upper opening of the quenching cell 2 is connected in a manner sealed to the transfer tunnel 6 by a flange 37 and thus forms a passage for the 5. It can be closed tightly by means of a door 38 sliding or pivoting. In this example, the sliding door 38 horizontally inside the tunnel 6 to an open position 38a drawn in broken lines. This makes it possible to disassemble or replace the quenching cell 2 without stopping the oven 1.
- the airlock 43 shown in FIG. 1 is fixed and coupled in a sealed manner to transfer tunnel 6 through an opening defined by a flange 40.
- This opening can to be closed in a sealed manner by a tilting door 41 arranged in the tunnel and whose open position 41a is drawn in broken lines.
- the mechanical means for actuating the plug 24 and the doors 38 and 41 are advantageously arranged inside the transfer tunnel 6.
- the airlock 5 is provided with a side door 42 for the entry and exit of a load 5 when the door 41 is closed.
- the airlock preferably has a shape cylindrical to receive a load of the same shape.
- the side door 42 can then advantageously open by sliding along the peripheral enclosure 43 of the airlock.
- the tightness between the door 42 and the enclosure can be ensured for example at medium of an inflatable seal. This arrangement is particularly economical and allows to limit the congestion related to the opening of the door.
- FIG. 3 represents a variant in which the lock 43 is mobile, for example example to transport each load 5 between the heat treatment plant and loading / unloading stations.
- the airlock 43 is mounted on a carriage 44 equipped with wheels 45 that move the airlock below the transfer tunnel 6 and to another position.
- the mobile lock 43 has only one opening upper 46 for the passage of loads 5.
- the seal between the airlock 43 and the tunnel 6 is preferably made by means of a flange 47 movable in height, which comes to rest on a seal 48 disposed on the lock.
- the mechanism controlling the raising and lowering of the collar 47 is placed in the tunnel. 6. Once the airlock is coupled tightly to the tunnel, the race of the flange 47 is typically a few centimeters only.
- FIG. 3 there is shown schematically in broken lines a second position of the mobile lock 43a, where we see that the introduction of a load in the airlock from a position 5a, or the extraction of a load in the airlock, vertically as indicated by the double arrow F.
- This operation is performed by means of a conventional lifting gear and is not more bulky in height that the transfer tunnel 6.
- the upper opening of the mobile lock 43 is equipped with a sliding door. This allows the airlock to be purged without being connected to the transfer tunnel 6. Meanwhile, a second airlock could be used mobile to introduce a load of parts into the tunnel.
- FIGS 4 and 5 schematically show an embodiment advantageous of the gripping device 30 whose carriage 8 is equipped to grip and carry a load of parts 5 to be treated.
- the support frame of the load has a parallelepipedal shape and comprises four uprights 51 connecting the plate lower 11 to horizontal upper sleepers 52.
- the gripping device 30 comprises for example four suspension hooks 54, integral with each of the other and vertically mobile thanks to the lifting means incorporated in the carriage 8.
- the hooks 54 are lowered as indicated by the arrows A, then moved together horizontally by moving the carriage 8 on its lane 9, as indicated by arrows B, until they are under the respective sleepers 52.
- the hooks 54 are then raised by the means of lifting the truck to lift the load 5.
- the reverse movements will be made to land the load once it has been deposited at its destination in one of the treatment element or in the airlock.
- FIG. 6 is a diagrammatic plan view of another embodiment of the gripping device 30, hooking the load 5 in the manner of a device to bayonet.
- the frame supporting the plate 11 and the parts to process has a triangular shape in plan, with three uprights 51 whose vertices are connected by three horizontal crosspieces 52.
- the input device 30 comprises in this case a vertical central column 55 moved vertically by the means of lifting the carriage and able to pivot about its vertical axis.
- the end lower column 55 is provided with three horizontal arms 56 offset angularly 120 °.
- the lowering of the column 55 makes it possible to introduce the arms 56 in the triangle formed by the cross members 52, then a rotation of the column on 60 ° as indicated by the arrow C makes it possible to bring each arm 56 into a position 56a, to hang each cross member 52 underneath and thus allow to lift the load using column 55.
- FIG. 7 schematically represents an embodiment of a plant according to the invention comprising a plurality of treatment elements associated with a transfer tunnel 6 and an entry / exit airlock 3, as described in FIG. 1 and 2.
- This installation may comprise, for example, on a single row, two austenitization and cementation furnaces 61, two furnaces 62 for the nitriding, nitrocarburizing, tempering or annealing, an oil quenching cell 63, a salt quenching cell 64 and an atmosphere cooling chamber 65 controlled, especially under inert gas, under pressure or at atmospheric pressure.
- Each load 5 of parts to be treated is transported between the airlock 3 and the different treatment elements 61 to 65 by the handling trolley 8 in the atmosphere controlled tunnel transfer 6.
- the processing facility has a clutter minimum, especially in height since it occupies only two levels and can therefore take place in a building with limited height.
- an installation according to the invention is not limited to only one row of treatment elements, to the extent that the means of arranged in the transfer tunnel 6 may also be designed to move the charges 5 in a transverse direction.
- the means of arranged in the transfer tunnel 6 may also be designed to move the charges 5 in a transverse direction.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Tunnel Furnaces (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Description
- un tunnel de transfert pourvu d'une enveloppe étanche et de moyens de manutention des charges comportant un chariot mobile longitudinalement dans le tunnel;
- un ensemble d'éléments de traitement capables de recevoir chacun au moins une des charges et comprenant au moins un four et au moins une cellule de trempe ou de refroidissement, chaque élément de traitement ayant une ouverture raccordable de manière étanche au tunnel de transfert pour former un passage pour les charges;
- au moins un sas d'entrée et/ou de sortie ayant une ouverture raccordable de manière étanche au tunnel de transfert pour le passage des charges;
- et des moyens de fermeture agencés pour obturer sélectivement lesdits passages.
- un ou plusieurs fours à pot ou à puits, caractérisés par une disposition radiale des éléments chauffants (électriques ou à gaz) et présentant une ouverture dans leur partie supérieure pour permettre l'introduction de la charge. L'ouverture peut être fermée au moyen d'un bouchon, actionné comme un tiroir ou pivotant sur un axe. Les fours permettent de réaliser tous les procédés de traitement thermiques (austénitisation sous atmosphère de protection jusqu'à 1300°C, revenu, recuit, nitruration et dérivés, cémentation et dérivés, etc.). Les fours sont disposés dans une partie inférieure de l'installation. Les bouchons sont ouverts ou fermés au moyen d'actionneurs mécaniques (moteurs, vérins). Plusieurs modes de réalisation peuvent être envisagés : par exemple, les bouchons peuvent être pivotants sur un axe disposé à l'intérieur du tunnel de transfert de transfert, ou sur le four lui-même, ou les bouchons peuvent être disposés sur un chariot et se dégager latéralement.
- une ou plusieurs cellules de trempe ou de refroidissement ouvertes sur le dessus pour permettre l'introduction de la charge. L'ouverture peut être fermée au moyen d'une porte, actionnée comme un tiroir ou pivotant sur un axe. La ou les cellules de trempe présentent l'avantage de ne pas nécessiter d'ascenseur intégré pour immerger la charge. Tous les fluides de trempe ou de refroidissement (eau, polymères, huile, sels fondus, lits de sable fluidisés, gaz (à la pression atmosphérique ou sous pression, etc.) sont utilisables. Les cellules de trempe sont disposées dans la partie inférieure de l'installation. Typiquement, l'ouverture des cellules de trempe se trouve dans un plan parallèle au plan défini par l'ouverture des fours.
- un tunnel de transfert, disposé dans la partie supérieure, et s'étendant au moins au-dessus de tous les fours et toutes les cellules de trempe ou de refroidissement devant communiquer entre eux pour des raisons métallurgiques (trempe, refroidissement contrôlé, etc.). Les fours et les cellules de refroidissement sont accouplés à ce tunnel de transfert de manière étanche, au moyen de flasques de fixation et/ou de membranes flexibles accommodant éventuellement les dilations thermiques respectives. Ce tunnel de transfert étanche peut être rempli de gaz de protection par exemple d'azote, ou être mis sous vide pour permettre de transférer les charges du ou des fours vers la ou les cellules de trempe sans oxydation ou détérioration de la surface des pièces traitées. Le tunnel de transfert permet en outre de concentrer l'ensemble des effluents provenant des opérations de trempe pour les canaliser en un endroit où ils sont traités pour prévenir des pollutions.
- un chariot de manutention capable de déplacer les charges sur deux ou trois axes, disposé à l'intérieur du tunnel de transfert, permettant d'insérer les charges dans les fours, de les extraire pour les engager dans les cellules de trempe ou de refroidissement et d'en extraire les charges.
- un sas d'entrée et de sortie assurant les transferts entre le tunnel de transfert et l'extérieur de l'installation. Le chariot de manutention assure également le déplacement des charges entre le sas et les autres éléments de l'installation.
Claims (11)
- Installation pour le traitement thermique de charges de pièces métalliques, comportant :un tunnel de transfert (6) pourvu d'une enveloppe étanche (7) et de moyens de manutention des charges comportant un chariot (8) mobile longitudinalement dans le tunnel;un ensemble d'éléments de traitement (1, 2, 61 à 65) capables de recevoir chacun au moins une des charges (5) et comprenant au moins un four (1) et au moins une cellule de trempe ou de refroidissement (2), chaque élément de traitement ayant une ouverture raccordable de manière étanche au tunnel de transfert pour former un passage pour les charges;au moins un sas (3, 43) d'entrée et/ou de sortie ayant une ouverture raccordable de manière étanche au tunnel de transfert pour le passage des charges;et des moyens de fermeture (24, 38, 41) agencés pour obturer sélectivement lesdits passages;
- Installation selon la revendication 1, caractérisée en ce que les moyens de fermeture comportent des bouchons ou portes (24, 38, 41) s'ouvrant par déplacement vers l'intérieur du tunnel de transfert (6).
- Installation selon la revendication 2, caractérisée en ce que les moyens de fermeture sont montés à l'intérieur de l'enveloppe (7) du tunnel de transfert (6).
- Installation selon l'une des revendications précédentes, caractérisée en ce que les éléments de traitement comportent au moins un four à pot (1, 61, 62).
- Installation selon l'une des revendications précédentes, caractérisée en ce que les éléments de traitement comportent au moins une cellule de trempe à liquide (2, 63, 64).
- Installation selon l'une des revendications précédentes, caractérisée en ce que les éléments de traitement comportent au moins une chambre de refroidissement à atmosphère contrôlée (65).
- Installation selon l'une des revendications précédentes, caractérisée en ce que le sas (43) est mobile.
- Installation selon la revendication 7, caractérisée en ce que l'ouverture supérieure (46) du sas mobile est obturable par une porte (41) montée sur le tunnel de transfert (6).
- Installation selon l'une des revendications précédentes, caractérisée en ce que les moyens de levage du chariot de manutention (8) comportent un dispositif de saisie (30) capable de s'accrocher à la charge (5) placée dans le sas ou dans un élément de traitement.
- Installation selon la revendication 9, caractérisée en ce que le dispositif de saisie (30) comporte des crochets (54) agencés pour être déplacés verticalement par les moyens de levage et horizontalement par des déplacements du chariot (8) pour s'accrocher à la charge (5) et s'en décrocher.
- Installation selon la revendication 9, caractérisée en ce que le dispositif de saisie (30) comporte une colonne centrale (55) agencée pour être déplacée verticalement par les moyens de levage et pivoter autour de son axe vertical pour s'accrocher à la charge (5) et s'en décrocher.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00203331A EP1193317B1 (fr) | 2000-09-27 | 2000-09-27 | Installation pour le traitement thermique de charges de pièces métalliques |
AT00203331T ATE272128T1 (de) | 2000-09-27 | 2000-09-27 | Wärmebehandlungsanlage für ladungen von metallischen werkstücken |
DE60012529T DE60012529T2 (de) | 2000-09-27 | 2000-09-27 | Wärmebehandlungsanlage für Ladungen von metallischen Werkstücken |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00203331A EP1193317B1 (fr) | 2000-09-27 | 2000-09-27 | Installation pour le traitement thermique de charges de pièces métalliques |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1193317A1 EP1193317A1 (fr) | 2002-04-03 |
EP1193317B1 true EP1193317B1 (fr) | 2004-07-28 |
Family
ID=8172063
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00203331A Expired - Lifetime EP1193317B1 (fr) | 2000-09-27 | 2000-09-27 | Installation pour le traitement thermique de charges de pièces métalliques |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1193317B1 (fr) |
AT (1) | ATE272128T1 (fr) |
DE (1) | DE60012529T2 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6902635B2 (en) * | 2001-12-26 | 2005-06-07 | Nitrex Metal Inc. | Multi-cell thermal processing unit |
DE102009041927B4 (de) * | 2009-09-17 | 2015-08-06 | Hanomag Härtecenter GmbH | Verfahren zur Niederdruckaufkohlung metallischer Werkstücke |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE720924C (de) * | 1937-01-05 | 1942-05-19 | Koppers Gmbh Heinrich | Verfahren und Einrichtung zum Brennen von keramischen Rohren, Staeben o. dgl. |
US3926415A (en) * | 1974-01-23 | 1975-12-16 | Park Ohio Industries Inc | Method and apparatus for carbonizing and degassing workpieces |
US5402994A (en) * | 1992-01-15 | 1995-04-04 | Aichelin Gmbh | Device for heat-treating metal workpieces |
ATE200927T1 (de) * | 1996-01-17 | 2001-05-15 | Pierre Beuret | Wärmebehandlungsanlage für eine ladung aus metallischen stücken |
IT1293740B1 (it) * | 1997-07-21 | 1999-03-10 | Refrattari Brebbia S R L | Impianto automatico per trattamenti termici di materiali metallici, in particolare acciai. |
FR2771754B1 (fr) * | 1997-12-02 | 2000-02-11 | Etudes Const Mecaniques | Installation de traitement thermique sous vide modulaire |
-
2000
- 2000-09-27 EP EP00203331A patent/EP1193317B1/fr not_active Expired - Lifetime
- 2000-09-27 DE DE60012529T patent/DE60012529T2/de not_active Expired - Lifetime
- 2000-09-27 AT AT00203331T patent/ATE272128T1/de not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE60012529T2 (de) | 2005-08-04 |
EP1193317A1 (fr) | 2002-04-03 |
DE60012529D1 (de) | 2004-09-02 |
ATE272128T1 (de) | 2004-08-15 |
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