EP2767599B1 - Procédé de fonctionnement d'une ligne de traitement thermique - Google Patents

Procédé de fonctionnement d'une ligne de traitement thermique Download PDF

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Publication number
EP2767599B1
EP2767599B1 EP13186929.9A EP13186929A EP2767599B1 EP 2767599 B1 EP2767599 B1 EP 2767599B1 EP 13186929 A EP13186929 A EP 13186929A EP 2767599 B1 EP2767599 B1 EP 2767599B1
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EP
European Patent Office
Prior art keywords
temperature
component
station
heat treatment
temperature control
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.)
Active
Application number
EP13186929.9A
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German (de)
English (en)
Other versions
EP2767599A1 (fr
Inventor
Georg Frost
Werner Morgenroth
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.)
Benteler Automobiltechnik GmbH
Original Assignee
Benteler Automobiltechnik 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.)
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Publication date
Application filed by Benteler Automobiltechnik GmbH filed Critical Benteler Automobiltechnik GmbH
Priority to DE102013113119.0A priority Critical patent/DE102013113119B4/de
Priority to DE102013022292.3A priority patent/DE102013022292B4/de
Priority to CN201310664738.3A priority patent/CN103993137A/zh
Priority to US14/180,106 priority patent/US20140224388A1/en
Publication of EP2767599A1 publication Critical patent/EP2767599A1/fr
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Publication of EP2767599B1 publication Critical patent/EP2767599B1/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
    • C21D9/0056—Furnaces through which the charge is moved in a horizontal straight path
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/673—Quenching devices for die quenching
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • 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 present invention relates to a method for operating a heat treatment line according to the features in the preamble of patent claim 1.
  • the hot forming and press hardening technology has been standardized for years, whereby a sheet metal plate heated to austenitizing temperature is inserted into a forming tool, is hot formed in this forming tool and is simultaneously quenched in the forming tool and thereby hardened.
  • chamber furnaces are known that can be arranged in an assembly hall to save space. Such a chamber furnace is limited in its holding capacity, so that it can essentially only hold one component at a time. If the possibility of further processing is now interrupted, for example a manipulator for loading the chamber furnace has failed, the production process comes to a standstill, so that the components sometimes remain in the chamber furnace for a longer period of time.
  • the chamber furnaces are heated to above the austenitizing temperature and therefore require a high amount of energy to operate the furnace itself.
  • WO 2010/127837 A2 a method for heat treatment of a metal blank is shown in which the component is successively heated more intensely in at least two, preferably three heat treatment stages, so that austenitization takes place in the last heat treatment stage.
  • the object of the present invention is therefore to show a possibility of more efficient heat treatment of metal components, taking up less space in an assembly hall, compensating for production fluctuations and optimizing energy consumption.
  • a heat treatment line for the production of a heat-treated, in particular precoated metal component according to the method according to the invention, a heating station being provided which at least in some areas heats the metal component to a component temperature above the austenitizing temperature and a temperature control station is provided, the temperature control station having an internal temperature at least in some areas which corresponds essentially to a temperature of the metal component.
  • a heating station is thus initially provided in the heat treatment line, which can preferably be designed as a chamber furnace, alternatively also as a rotary furnace or continuous furnace.
  • the component is heated to the desired component temperature.
  • This component temperature is particularly preferably set above the austenitizing temperature and is therefore between 800 ° C and 1000 ° C, in particular between 850 ° C and 950 ° C.
  • At least this austenitizing temperature is generated in regions in the component with the heat treatment line according to the invention.
  • the remaining areas of the component then remain at a temperature below the austenitizing temperature.
  • the internal temperature of the heating station should therefore be set above this temperature.
  • the internal temperature of the heating station must be set significantly above the component temperature.
  • the temperature within the heating station is therefore preferably between 1000 ° C to 1300 ° C, in particular 1100 ° C to 1200 ° C.
  • the internal temperature of the heating station should be selected from 5 to 30% above the component temperature, preferably 10 to 25% above the component temperature.
  • the heating station can in particular be designed as a furnace with a burner.
  • the components thus heated to the component temperature are then removed from the heating station and, according to the invention, in a temperature control station convicted.
  • the temperature control station is designed as an intermediate station in order to maintain the component temperature set in the component itself, at least in certain areas. In the temperature control station itself, the component temperature is then maintained at least in some areas, whereas the unheated areas are correspondingly below the component temperature. In this case, it is then possible that an internal temperature preferably prevails in the temperature control station which corresponds to the component temperature itself. As an alternative to this, it is possible that an internal temperature prevails in the temperature control station which is set slightly above, in particular between 0 and 10%, very particularly preferably between 1 and 5% above the component temperature.
  • the tempering station If production fluctuations occur in further processing after the tempering station or already at the heating station, for example due to failure of a heating station or failure of a manipulator for transferring the components between the individual stations, it is possible with the tempering station according to the invention that a buffer of to be heated metal components is built, the buffer makes it possible that the entire production does not necessarily have to be interrupted. Maintenance work can therefore be carried out, whereby production can initially continue due to the metal components located in the temperature control station. For this purpose, in normal production there are always between 40 and 60% of the possible components to be picked up within the temperature control station. This ensures that in the event of a failure of the production line after the temperature control station, components can initially still be transferred from the heating station to the temperature control station. If the production line before the If the temperature control station fails, components for further production are initially still stored within the temperature control station.
  • the temperature control station itself is particularly preferably designed as a continuous furnace.
  • the advantage over the prior art is that the temperature control station does not have to have lengths of several dozen meters as a conventional continuous furnace so that the component is heated to a temperature over the period of time to be transported, but only to the temperature is held. It is therefore possible to design the temperature control station as a continuous furnace only a few meters long. In the context of the invention, it is also possible in the continuous furnace, for example by means of sealing bulkheads or the like, to keep the component temperature to be produced in the temperature control station only in certain areas.
  • both the temperature control station and the heating station are therefore suitable for only partially heat treating the metal components.
  • a metal component is to be understood in particular as a circuit board, the metal component also being able to be treated as a three-dimensionally shaped metal component with the heat treatment line according to the invention.
  • Pre-coated materials for example a board with a metallic coating, can also be used with particular preference.
  • the temperature control station itself to be designed as a chamber furnace, with several chamber furnaces being stored one above the other and / or next to one another. It is then possible, by using a manipulator, in particular in the form of an industrial robot, to equip the multiple chamber furnaces in the temperature control station or to remove the components that are temperature-controlled there.
  • a manipulator in particular in the form of an industrial robot
  • the component in the chamber furnace or in the rotary furnace described below, it is in turn possible for the component to be tempered to the correspondingly desired component temperature, at least only in areas, in the tempering station. Again, it is possible here to keep other areas cool or colder than the component temperature, for example by means of supports in the form of cooling plates or through partition walls, sealing bulkheads or insulation.
  • the temperature control station itself is preferably designed as a rotary furnace.
  • it offers the advantage that the rotary kiln can be loaded with the aid of just one manipulator.
  • the rotary kiln is designed in particular in such a way that it has several receiving options for metal components one above the other and radially circumferentially next to one another. An empty chamber of the temperature control station can then be filled by the manipulator.
  • a cooling station is connected downstream of the temperature control station.
  • the components heated to above austenitizing temperature are removed from the tempering station and then quench hardened in the cooling station. This can be done, for example, with the aid of a shower or shower, so that the component is guided through a sprayed-on cooling medium.
  • the cooling station it is possible for the cooling station to be designed as an immersion bath, so that the component is removed and immersed in the cooling station.
  • the material of the component undergoes a structural transformation such that the austenitic structure is converted into an essentially martensitic structure.
  • the cooling station can also be a hot forming and press hardening tool within the scope of the invention.
  • the correspondingly heat-treated component is then transferred from the temperature control station to the hot-forming tool, where it is hot-formed and then press-hardened.
  • the component is only austenitized in certain areas, then press hardening is only carried out in certain areas, whereas the areas that have not been tempered are not completely austenitized and are therefore not completely hardened. These have a rather ductile component property.
  • the method according to the invention for operating the heat treatment line according to the aforementioned features wherein the heat treatment line is operated in such a way that an internal temperature prevails in the heating station which is above the component temperature and in the temperature control station a Inside temperature prevails, which corresponds to the component temperature.
  • An internal temperature is set within the heating station that is between 1000 ° C and 1300 ° C, in particular between 1100 ° C and 1200 ° C, and the internal temperature of the temperature control station is between 800 ° C and 1000 ° C, preferably between 850 and 950 ° C .
  • the temperature control station is used as a buffer in order to compensate for downtime and / or interruptions in production at the heating station and / or at the cooling station.
  • a particularly advantageous embodiment of the method according to the invention has proven to be when the metal component is removed from the heating station at an actual component temperature of 700 ° C to 1100 ° C, preferably 800 ° C to 1000 ° C, in particular 850 ° C to 950 ° C and is then reheated at least in some areas in the temperature control station to above the austenitizing temperature, in particular to the component temperature, particularly preferably at least 900 ° C. It is also possible to reheat the entire component to over 900 ° C in the subsequent temperature control station. This results in an overall shortened running time that the pre-coated metal component needs to realize on the corresponding heat treatment line when producing an at least regionally homogeneous intermetallic alloy coating.
  • an aluminum-silicon coating for example, is used as a metallic pre-coating on the metal component to be heat-treated, in particular hot-formed and press-hardened.
  • the heating phase can be further shortened in terms of time if a metal component is produced with a pre-alloyed metallic precoating.
  • Pre-alloyed is to be understood as meaning that before the heating station, especially at the steel producer, a heat treatment is carried out Diffusion processes between the steel substrate and the elements of the metallic coating is carried out.
  • FIG. 1 shows a heat treatment line 1 according to the invention for the production of heat-treated metal components.
  • the heat treatment line 1 has a heating station 2 in the form of three adjacent chamber furnaces 3 as well as a temperature control station 4 downstream of the heating station 2.
  • the temperature control station 4 itself is designed as a roller hearth oven 5, so that the roller hearth oven 5 has a receiving side 6 with a receiving opening, not shown, as well as a Has removal side 7 with a removal opening not shown.
  • the temperature control station 4 is followed by a cooling station 8, for example in the form of an immersion bath. Between the individual stations, an industrial robot 9 is used, which transfers the metal components, not shown in detail, between the individual stations.
  • FIG. 2 shows an alternative embodiment variant, the heat treatment line 1 again having a heating station 2 in which chamber furnaces 3 are arranged next to one another.
  • the temperature control station 4 itself is designed in the form of a rotary furnace 10, which can be freely rotated in the direction of rotation D, in order to transfer individual components from the heating station 2 to the heating station 2 via an industrial robot 9 To transfer rotary kiln 10 and, after a certain storage time within the rotary kiln 10, to remove it therefrom and to supply it to the cooling station 8.

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  • 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)
  • Heat Treatment Of Articles (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Claims (5)

  1. Procédé de fonctionnement d'une ligne de traitement thermique (1) pour la fabrication en particulier d'un composant métallique doté d'un prérevêtement, la ligne de traitement thermique comprenant une station de chauffage (2) qui chauffe le composant métallique à une température de composant supérieure à la température d'austénitisation et une station de régulation de température (4) en aval de la station de chauffage (2), caractérisée en ce qu'une température interne comprise entre 1000 °C et 1300 °C est fixée dans la station de chauffage (2), qui est 5 à 30 % supérieure à la température de composant, et une température interne comprise entre 800 °C et 1 000 °C prévaut dans la station de régulation de température (4), qui correspond à la température de composant.
  2. Procédé selon la revendication précédente, caractérisé en ce que la température interne de la station de chauffage (2) est réglée entre 1 100 °C et 1 200 °C et en ce que la température interne de la station de régulation de température (4) est réglée entre 850 °C et 950 °C.
  3. Procédé selon les revendications précédentes 1 ou 2, caractérisé en ce que la station de régulation de température (4) est utilisée comme tampon pour compenser les temps d'arrêt et/ou interruptions de production de la station de chauffage (2) et/ou d'une station de refroidissement (8).
  4. Procédé selon l'une quelconque des revendications précédentes 1 à 3, caractérisé en ce qu'un composant métallique doté d'un prérevêtement est traité thermiquement avec un prérevêtement métallique pour produire une phase intermétallique au moins dans certaines zones.
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que des supports, en particulier sous forme de plaques de refroidissement et/ou de blindage, sont appliqués sur le composant métallique de sorte que les zones ne soient pas amenées au-dessus de la température d'austénitisation.
EP13186929.9A 2013-02-14 2013-10-01 Procédé de fonctionnement d'une ligne de traitement thermique Active EP2767599B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE102013113119.0A DE102013113119B4 (de) 2013-10-01 2013-11-27 Verfahren zur Herstellung eines Stahlbauteils mit partiell unterschiedlichen Eigenschaften und Kammerofen
DE102013022292.3A DE102013022292B4 (de) 2013-10-01 2013-11-27 Verfahren zur Herstellung eines Stahlbauteils mit partiell unterschiedlichen Eigenschaften
CN201310664738.3A CN103993137A (zh) 2013-02-14 2013-12-10 热处理作业线和操作热处理作业线的方法
US14/180,106 US20140224388A1 (en) 2013-02-14 2014-02-13 Heat treatment line and method for operating the heat treatment line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013101489.5A DE102013101489B3 (de) 2013-02-14 2013-02-14 Wärmebehandlungslinie und Verfahren zum Betreiben der Wärmebehandlungslinie

Publications (2)

Publication Number Publication Date
EP2767599A1 EP2767599A1 (fr) 2014-08-20
EP2767599B1 true EP2767599B1 (fr) 2020-12-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP13186929.9A Active EP2767599B1 (fr) 2013-02-14 2013-10-01 Procédé de fonctionnement d'une ligne de traitement thermique

Country Status (5)

Country Link
US (1) US20140224388A1 (fr)
EP (1) EP2767599B1 (fr)
CN (1) CN103993137A (fr)
DE (1) DE102013101489B3 (fr)
ES (1) ES2845558T3 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150352621A1 (en) 2013-01-11 2015-12-10 Futaba Industrial Co., Ltd. Heating device for hot stamping
ES2828179T3 (es) * 2014-01-23 2021-05-25 Schwartz Gmbh Procedimiento de tratamiento térmico
DE102016100648B4 (de) 2015-12-23 2018-04-12 Benteler Automobiltechnik Gmbh Wärmebehandlungsofen sowie Verfahren zur Wärmebehandlung einer vorbeschichteten Stahlblechplatine und Verfahren zur Herstellung eines Kraftfahrzeugbauteils
DE102016125510B3 (de) 2016-12-22 2018-04-12 Benteler Automobiltechnik Gmbh Warmgeformtes metallisches Blechbauteil sowie Verfahren zur Herstellung einer Öffnung in einem solchen Blechbauteil
DE102017107549A1 (de) * 2017-04-07 2018-10-11 Schwartz Gmbh Temperierstation zur partiellen Wärmebehandlung eines metallischen Bauteils
DE102018103145A1 (de) 2018-02-13 2019-08-14 Ebner Industrieofenbau Gmbh Anordnung mit mehreren Temperierstationen zur Wärmebehandlung von Bauteilen und deren Handhabung
CN108588612B (zh) 2018-04-28 2019-09-20 育材堂（苏州）材料科技有限公司 热冲压成形构件、热冲压成形用预涂镀钢板及热冲压成形工艺

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NL1003293C2 (nl) * 1996-06-07 1997-12-10 Hoogovens Staal Bv Werkwijze en inrichting voor het vervaardigen van een stalen band.
DE102004007071B4 (de) * 2004-02-13 2006-01-05 Audi Ag Verfahren zur Herstellung eines Bauteils durch Umformen einer Platine und Vorrichtung zur Durchführung des Verfahrens
EP2182082B2 (fr) * 2008-10-29 2018-01-24 Neue Materialien Bayreuth GmbH Procédé et dispositif destinés à l'équilibrage de la température d'un corps en tôle d'acier
DE102009019496A1 (de) * 2009-05-04 2010-11-18 Braun, Elisabeth Vorrichtung und Verfahren zur Erwärmung warm umzuformender Werkstücke
DE102009051157B4 (de) * 2009-10-29 2011-09-22 Benteler Automobiltechnik Gmbh Kammerofen mit Übertemperatur
DE102010010156A1 (de) * 2010-03-04 2011-09-08 Kirchhoff Automotive Deutschland Gmbh Verfahren zur Herstellung eines Formteiles mit mindestens zwei Gefügebereichen unterschiedlicher Duktilität
ES2635765T5 (es) * 2011-03-10 2020-09-28 Schwartz Gmbh Sistema de horno y procedimiento para el calentamiento parcial de piezas de chapa de acero
EP2548975A1 (fr) * 2011-07-20 2013-01-23 LOI Thermprocess GmbH Procédé et dispositif de fabrication d'un composant métallique durci doté d'au moins deux zones ayant une ductilité différente
DE102012218159B4 (de) * 2012-10-04 2018-02-08 Ebner Industrieofenbau Gmbh Handhabungseinrichtung
DE102012110649C5 (de) * 2012-11-07 2018-03-01 Benteler Automobiltechnik Gmbh Warmformlinie sowie Verfahren zur Herstellung eines warmumgeformten und pressgehärteten Kraftfahrzeugbauteils

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Also Published As

Publication number Publication date
US20140224388A1 (en) 2014-08-14
CN103993137A (zh) 2014-08-20
ES2845558T3 (es) 2021-07-27
DE102013101489B3 (de) 2014-06-05
EP2767599A1 (fr) 2014-08-20

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