WO2011082934A1 - Procédé et dispositif pour chauffer et refroidir partiellement des pièces dans un four continu - Google Patents

Procédé et dispositif pour chauffer et refroidir partiellement des pièces dans un four continu Download PDF

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Publication number
WO2011082934A1
WO2011082934A1 PCT/EP2010/069274 EP2010069274W WO2011082934A1 WO 2011082934 A1 WO2011082934 A1 WO 2011082934A1 EP 2010069274 W EP2010069274 W EP 2010069274W WO 2011082934 A1 WO2011082934 A1 WO 2011082934A1
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WO
WIPO (PCT)
Prior art keywords
workpiece
continuous furnace
cooling
heating
temperature
Prior art date
Application number
PCT/EP2010/069274
Other languages
German (de)
English (en)
Inventor
Rolf-Josef Schwartz
Original Assignee
Schwartz, Eva
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 Schwartz, Eva filed Critical Schwartz, Eva
Publication of WO2011082934A1 publication Critical patent/WO2011082934A1/fr

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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
    • C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
    • 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
    • C21D2221/00—Treating localised areas of an article
    • 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

Definitions

  • the invention relates to a method for treating at least one workpiece in a continuous furnace, in which the workpiece is heated by heating means while it is moved by means of a transport device through the continuous furnace.
  • the invention further relates to a device for carrying out such a method.
  • molded components In the field of production and treatment of molded components, it is customary to manufacture molded components specifically with desired material properties. For example, in the automotive industry, components such as control arms, B-pillars, or automotive bumpers are cured by complete heating followed by quenching. This may be followed by an incentive procedure for a fee. In various applications, in particular of motor vehicle technology, however, it is advantageous that molded components have different material properties in different areas. For example, it may be provided that a component in one area should have high strength, while in another area it should have a higher ductility in relation to it. For example, in order to realize molded components which satisfy different stresses in several regions, it is possible to join components with different properties.
  • a well-known joining process is, for example, the welding of individual components, which, however, can lead to stress cracks in the resulting component and is also expensive due to the additional work step.
  • components can be reinforced by additional sheets.
  • Also suitable is the annealing of previously fully cured mold components in the appropriate places to areas with higher To achieve ductility. However, this leads to intolerable changes in shape in the component and is also expensive due to the additional work step.
  • Structural areas are known from the prior art, various methods and devices. For example, the heating of components with induction current is known. Here, however, high costs and uneven heating are to be expected.
  • European Patent Application EP 1 426 454 A1 discloses a method for producing a molded component having at least two structural regions of different ductility and a continuous furnace for carrying out this process.
  • a semifinished product to be heated is transported as a blank or preformed component through a continuous furnace, which comprises two juxtaposed zones in which different temperature levels are set.
  • the component is heated in the oven to two different temperatures and then subjected to a thermoforming process and / or a hardening process.
  • a more ductile microstructure arises in the less heated area of the component, while a solid or high-strength microstructure is established in the higher heated area.
  • this method has the disadvantage, for example, that the temperature required for a good surface finish in the ductile region is not reached, and thus a subsequent paint adhesion can not be ensured.
  • the German Utility Model DE 200 14 361 U1 describes a method for producing a B-pillar with different structural areas, in which the B-pillar is heated in an oven and austenitized and then cured in a cooled tool.
  • the B-pillar is heated in an oven and austenitized and then cured in a cooled tool.
  • large areas of the board or the semifinished product used are isolated from the effect of temperature, so that sets in the shielded areas no martensitic material structure with resulting high strengths.
  • an unsafe process since in the case of a malfunction heat can penetrate into the covered areas and thus these areas are heated to hardening temperature.
  • the known methods are in particular unsuitable for producing molded parts which are partially in a central region, for example in the region of
  • An object of the invention is therefore to provide a method for heating workpieces, which allows the formation of such different material properties in the workpiece while maintaining quality standards.
  • An object of the invention is further to provide a corresponding device for carrying out the method.
  • the invention provides a method for treating at least one workpiece in a continuous furnace in which the workpiece is heated by heating means while it is moved by means of a transport device through the continuous furnace. After a first heating of the workpiece by the heating means, the held piece for a predetermined period at a predetermined position in the continuous furnace, wherein the workpiece is further heated at this predetermined position or maintained at temperature and at the same time partially cooled in a defined portion of the workpiece.
  • the workpiece in the defined section can be specifically heated or cooled to a temperature which is below the temperature achieved in the rest of the workpiece. In particular, this temperature in the rest of the workpiece is the austenite temperature (hardening temperature) of the relevant material. This results in a different quenching of the entire workpiece in this section to other material properties than in the rest of the workpiece.
  • An embodiment of the method is therefore characterized in that the workpiece is brought by the heating by means of the heating means to a temperature T H , which corresponds at least to the hardening temperature of the material of the workpiece, while the workpiece in the defined section by the partial cooling by means of Cooling body is cooled to a temperature T 2 , which is below the hardening temperature of the material of the workpiece.
  • T H a temperature which corresponds at least to the hardening temperature of the material of the workpiece
  • T 2 which is below the hardening temperature of the material of the workpiece.
  • the partial cooling takes place in a defined region of the workpiece by means of a heat sink, which is mounted in the continuous furnace and is in the predetermined position of the workpiece in the region of the defined portion of the workpiece.
  • the workpiece can be cooled specifically in the defined range.
  • An embodiment of the method provides that the heat sink and the workpiece have no contact. The heat transfer takes place essentially by radiation.
  • the heat sink is cooled by means of a coolant and absorbs heat of the work piece at a cooling rate which is below the martensite-forming critical cooling rate.
  • a further embodiment of the method includes that the workpiece for partial cooling is lifted by the heat sink in the defined section of at least one stamp in a position in which the workpiece has no contact with the transport device, wherein the workpiece after the predetermined period of time is lowered back from the stamp on the transport means, and the movement of the punch is controlled by a control device.
  • Another embodiment of the method is characterized in that the workpiece is moved so far back into the continuous furnace after aligning that a first portion of the workpiece is in a continuous furnace, while a second portion of the workpiece is outside the continuous furnace.
  • a different microstructure can be set by the temperature in these areas outside the furnace is set lower than the temperature within the furnace.
  • the invention also includes an apparatus for carrying out the described method.
  • a corresponding device for treating at least one workpiece comprises a continuous furnace with a transport device and heating means for heating the workpiece, while it is moved by the conveyor through the continuous furnace.
  • the device according to the invention comprises means for holding the workpiece for a predetermined period of time at a predetermined position, wherein at this predetermined position, cooling means are provided for partially cooling the workpiece in a defined portion of the workpiece.
  • the partial cooling takes place in a defined region of the workpiece by means of a heat sink, which is located in the predetermined position of the workpiece in the region of the defined section of the workpiece.
  • the cooling body has a coating for absorbing the heat of the workpiece.
  • this coating comprises a gold layer having a relatively low emission factor.
  • a repeatedly discontinuous layer of a material whose emission factor is higher than the emission factor of the gold layer can be applied to the gold layer.
  • This repeatedly interrupted layer exposes areas of the gold layer and covers other areas, resulting in a combination of high and low emission factor areas on the surface of the cooling surface.
  • the repeatedly interrupted layer is realized by a grid structure.
  • An embodiment of the device is characterized in that the heat sink has at least one cooling circuit with a coolant, which is supplied to the heat sink via at least one cooling channel. So the degree of cooling can be set exactly.
  • the cooling channel relative to the furnace interior on a thermal insulation.
  • the device for raising and lowering of the workpiece has at least one punch, which is located below the workpiece, wherein the punch is designed for upward and downward movement and a control device is provided, which these up and Downward movement is driving.
  • the method according to the invention and the associated device have the advantage that, due to the partial cooling, different microstructures can be produced at defined regions in the component.
  • the structure can be reliably adjusted and reproduced reliably.
  • a molded component can be heated homogeneously in a continuous furnace to a temperature at which a pearlite and ferrite structure is formed. During further heating of the molded component to austenitic temperature, partial cooling takes place in one or more predefined regions of the molded component. When the remaining areas have reached the austenitic temperature, the mold component is driven out of the continuous furnace and, for example, both transformed in a water-cooled press tool and cooled quickly.
  • the hot austenite forms a hard martensite steel and the cooler pearlite and ferrite form a soft and plastically deformable pearlite and ferritic steel.
  • the entire mold member may first be heated to austenite temperature and then cooled in defined ranges to a temperature below the austenite temperature while maintaining the remainder of the workpiece at austenite temperature.
  • a heat sink with at least one cooling channel in the predetermined region of the furnace has the advantage that targeted cooling of the workpiece in a defined region can be achieved with this heat sink.
  • the heat sink can have various dimensions and geometries that can be adapted to the desired shape of the structural areas. Heat sinks can also be replaced depending on the desired geometry.
  • FIG. 1 shows a continuous furnace with a heat sink and a stamp.
  • 2 shows a heat sink
  • 3 shows a partially cooled workpiece with a cooled area in a continuous furnace
  • Fig. 5 is a schematic plan view of a workpiece in a continuous furnace.
  • Fig. 1 shows schematically as an example a continuous furnace 101 with a furnace chamber 102, in which a transport device for workpieces 103, for example a roller conveyor 104 is provided.
  • the workpieces 103 are deposited on the roller conveyor 104 and moved by the driven rollers of the roller conveyor 104 through the continuous furnace 101.
  • the furnace chamber 102 is heated directly or indirectly by means of heating means 105.
  • the workpieces 103 can be any components in which different regions with different material properties are desired.
  • it may be the B pillar or a molded part for a B pillar of a motor vehicle, in which the lock box area of the B pillar should be comparatively ductile, while the rest of the component should have a higher strength.
  • the furnace chamber 102 of the continuous furnace 101 is usually closed and has only an input and an output region, through which the workpieces 103 are moved in one place in the continuous furnace 101 in and out at another point.
  • the associated inlet and outlet openings can preferably be temporarily closed in each case with a furnace pusher.
  • suitable heating means 105 are arranged, with which the workpieces 103 can be heated when passing through the continuous furnace 101 on the roller conveyor 104.
  • Such heating means 105 are from the prior Technique known and are not explained in detail. All other necessary components for operating the continuous furnace 101 are not the subject of the invention and can be selected by the skilled person suitable.
  • At least one heat sink 106 for partial cooling of a predetermined region of a workpiece 103 and a punch 107 for raising and lowering the workpiece 103 in a defined region of the furnace chamber 102 are arranged in the furnace chamber 102.
  • the schematic construction of a heat sink 106 which is also shown by way of example in FIG. 2, includes, for example, a lower cooling surface 201, at least one cooling channel 202 for a coolant 203 and a heat insulation 204.
  • the critical quenching rate below which martensite is formed.
  • the critical quenching rate for the partial cooling of a workpiece by one or more heat sinks must not be reached or undershot.
  • the heat sink must be designed accordingly.
  • the coolant 203 is supplied to the cooling body 106 via the cooling channel 202, which flows through the heat sink 106 in the direction of the arrow.
  • a coolant 203 is suitable, for example, water at a temperature of about 20 ° C.
  • other coolants such as, for example, liquid nitrogen, ammonia, various hydrocarbons or else molten salts with which absorbed heat can be removed from the cooling surface 201.
  • the cooling channel 202 is correspondingly surrounded by a heat insulation 204, which prevents uncontrolled heat from the furnace chamber 102 is absorbed.
  • Suitable materials for the thermal insulation 204 are, for example, mineral fibers such as stone or glass wool and mineral foams such as perlite or expanded clay.
  • the cooling channel 202 Depending on the desired cooling capacity, it is possible to form the cooling channel 202 with one or several windings and to guide it through the heat sink 106. Furthermore, it is possible to integrate a plurality of cooling channels 202 in the heat sink 106. In this case, the more turns the cooling channel 202 has or the more cooling channels 202 have been integrated, the more heat can be dissipated locally via the heat sink 106 out of the furnace chamber. Further, it is possible to form the cooling channel 202, for example, as a chamber made of sheet metal with or without fluid baffles and with an inlet and a discharge. The supply and discharge lines can also serve as fasteners.
  • the emission factor ⁇ indicates how much thermal radiation a body emits.
  • the emission factor ⁇ corresponds to a value between 0 (no emission) and 1 (maximum emission), where both 0 and 1 are in principle only ideal physical cases and 1 is only achieved by a blackbody emitter.
  • the emission factor ⁇ is a dimensionless characteristic number, which is determined from the ratio of the radiation of the body to the black radiator.
  • Another factor for the size of the emission factor ⁇ is the temperature of the body. According to Stefan-Boltzmann, the higher the temperature of the body, the higher its specific emission.
  • the heat absorption of the heat sink 106 can be adjusted. This is possible, for example, a coating of the entire cooling surface 201 with gold and a subsequent regional coverage with black paint.
  • a coating of the entire cooling surface 201 with gold and a subsequent regional coverage with black paint For example, to define the areas to be painted, it is possible to use a previously created template which has a grid structure. After placing the template, the gold-coated cooling surface 201 is sprayed with black paint and it forms according to the template, a pattern of golden and black areas on the cooling surface 201 from.
  • the desired emission factor ⁇ is set as a combination of the emission factors of the two materials. It is also possible here to provide a black surface, which is covered with a grid of gold.
  • the black paint used should be resistant to high temperatures, since the cooling surface 201 is located inside the furnace chamber 102, in which temperatures of up to 1,300 ° C. can be achieved.
  • conventional black exhaust paint which is frequently used in industry, has proved suitable for this purpose.
  • the shape of the cooling surface 201 of the heat sink 106 can be freely designed and is derived from the shape of the predetermined region of the workpiece 103, which is to be partially cooled in the oven chamber 102 of the continuous furnace 101. In this case, both two-dimensional shapes for sheet metal parts as well as three-dimensional shapes for preformed components can be realized.
  • FIG. 3 shows schematically the use of the described heat sink 106 in the furnace chamber 102 of the continuous furnace 101 according to FIG. 1. After being introduced into the entrance area of the continuous furnace 101, the workpiece 103 moves on The roller conveyor 104 through the furnace chamber 102. In this case, there is a first heating of the workpiece 103 to a predetermined temperature Ti, which is either below the hardening temperature of the material of the workpiece 103 or already at least equal to the hardening temperature.
  • the transport movement of the roller conveyor 104 is temporarily interrupted.
  • the workpiece 103 is lifted off the roller conveyor 104 by means of the punch 107 and brought into a predetermined position, which is defined by the location of the portion 301 of the workpiece 103 which is to receive a deviating material structure. In this position, the workpiece 103 is no longer in contact with the warm rollers of the roller conveyor 104, and the portion 301 is located directly opposite the heat sink 106 at a distance of about 5-10 mm.
  • the workpiece 103 is either further heated to a temperature T H which at least corresponds to the hardening temperature of the workpiece material or held at hardening temperature, if this has already been reached in the alternative process control, while cooling in the area of the heat sink 106 a temperature below the austenite temperature is set. Subsequently, the workpiece is set down again with the punch 107 on the roller conveyor 104.
  • the punch 107 is located below the workpiece 103 and performs a clocked up and down movement, which is controlled by a control device, not shown.
  • the punch 107 may be guided by a gap between two adjacent rollers of the roller conveyor 104 and so lift the workpiece 103 clocked and lowered again.
  • the stamp 107 itself can be designed in different ways in order to lift and lower workpieces 103 safely. Larger workpieces 103 or workpieces 103 with a complex geometry may require the use of two or more punches for raising and lowering. As a result, a higher support safety for the workpiece 103 is achieved and it The workpiece 103 is prevented from falling off the punch 107 while being held in the predetermined position.
  • stoppers are used, which bring the incoming workpiece 103 in a predetermined position.
  • a planar profile can be provided, against which the workpiece 103 starts.
  • other methods for aligning the workpiece 103 are conceivable, these methods need not be limited to just aligning outside of the continuous furnace 101.
  • the positioned and if necessary aligned workpiece 103 is held by the punch 107 for a predetermined period in the predetermined position and thereby further heated or maintained at temperature, while the heat sink 106, a simultaneous cooling of the workpiece 103 in the partial region 301 to a temperature T 2 which is below T H.
  • the workpiece 103 is lowered by the punch 107 and put back onto the roller conveyor 104.
  • the temporarily interrupted transport movement of the roller conveyor 104 is taken up again and the workpiece 103 is moved out of the continuous furnace 101.
  • the workpiece is now outside the continuous furnace 101 with the desired temperatures T H and T 2 and can be supplied to further process steps.
  • Structural change must take place.
  • the temperature and thus the extent of the structural change should only be higher than in the partial area 301 in order to achieve the desired differences in the material properties.
  • the continuous furnace 101 must be equipped with a plurality of heat sinks 106 at different positions.
  • the punch 107 for raising and lowering of the workpieces 103 is to be designed so that it can raise and lower several workpieces 103 at the same time. If necessary, several separate punches 107 are provided for this purpose.
  • a plurality of heat sinks 106 at different positions in the continuous furnace 101 are also required if different subregions 301 of a workpiece 103 are to have different material structures. This results in a very high flexibility in the formation of the material structure of the various portions 301, since each individual heat sink 106 can be cooled differently by the structure of the cooling channel 202 and / or the temperature of the coolant 203 can be made variable for each heat sink 106.
  • FIG. 4 schematically shows an example of the cooling of two different partial regions 301 and 401, wherein the right partial region represents an end region 401 of the workpiece 103.
  • the workpiece 103 is introduced into the continuous furnace 101, that the end portion 401 in the transport direction of the workpiece 103 is forward. If the process is carried out in an oven where a workpiece is removed from the same opening through which it was placed in the oven, this is just the opposite. Then, the end region in which a higher ductility is to be achieved, in the transport direction of the workpiece 103 should be behind when the workpiece 103 is moved into the oven. After the introduction of the workpiece 103 in the continuous furnace 101, the workpiece 103 moves on the roller conveyor 104 through the furnace chamber 102.
  • a first heating of the workpiece 103 to a predetermined temperature Ti which is either below the hardening temperature of the material of the workpiece 103 or at least the hardening temperature corresponds.
  • a predetermined temperature Ti which is either below the hardening temperature of the material of the workpiece 103 or at least the hardening temperature corresponds.
  • the transport movement of the roller conveyor 104 is temporarily interrupted.
  • the workpiece 103 is lifted off the roller conveyor 104 by means of the punch 107 and brought into the predetermined position, held there for a predetermined period of time and depending on the process, either further heated to the temperature T H , which corresponds to at least the hardening temperature or on the previously reached hardening temperature maintained.
  • the cooling body 106 cools the workpiece 103 in the partial area 301 to a temperature T 2 which is below the hardening temperature.
  • the edge region 401 of the workpiece 103 which is located outside of the continuous furnace 101, is also cooled by the ambient conditions of the continuous furnace 101 to a temperature T 3 which is below the hardening temperature.
  • an alignment of the workpiece 103 can also be interposed here. For this, after the first heating, the workpiece 103 is completely or partially moved out of the continuous furnace 101, aligned and then partly moved back into the continuous furnace 101, wherein the edge region 401 remains outside the continuous furnace 101 and does not move back into the continuous furnace 101 becomes.
  • FIG. 5 schematically shows a plan view of a workpiece 103 in such a method in a continuous furnace 101.
  • the workpiece 103 has a partial region 301 and an edge region 401 which is located outside of the continuous furnace 101.
  • the roller conveyor 104 and the punch 107 which is arranged between two adjacent rollers of the roller conveyor 104, so that it can be moved out between the two rollers.
  • control device of the continuous furnace 101st
  • sensors provided within the continuous furnace 101 determine the position of the workpiece 103 on the roller conveyor 104 and transmit them to the control device, which then performs a suitably adapted control of the upward and downward movement of the punch 107.
  • the control device also predefines the direction of movement of the roller conveyor 104.

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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)

Abstract

L'invention concerne un procédé de traitement d'au moins une pièce dans un four continu. La pièce est chauffée par des moyens de chauffage, tandis qu'elle est déplacée au moyen d'un dispositif de transport à travers le four continu. Après un premier chauffage de la pièce par les moyens de chauffage, la pièce est maintenue pendant un temps prédéterminé dans une position prédéterminée dans le four continu, la pièce étant chauffée davantage dans cette position prédéterminée et étant simultanément partiellement refroidie dans un segment défini de ladite pièce. Pour mettre en œuvre le procédé, l'invention utilise un dispositif de traitement d'au moins une pièce, qui comprend un four continu avec un dispositif de transport et des moyens de chauffage pour chauffer la pièce tandis qu'elle est déplacée au moyen du dispositif de transport à travers le four continu. Le dispositif présente des moyens pour maintenir la pièce pendant un temps prédéterminé dans une position prédéterminée, et des moyens de refroidissement pour le refroidissement partiel de la pièce dans un segment défini de ladite pièce sont disposés dans cette position prédéterminée.
PCT/EP2010/069274 2009-12-16 2010-12-09 Procédé et dispositif pour chauffer et refroidir partiellement des pièces dans un four continu WO2011082934A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP09015550A EP2336374A1 (fr) 2009-12-16 2009-12-16 Procédé et dispositif destinés au chauffage et au refroidissement partiel de pièces usinées dans un four à passage continu
EP09015550.8 2009-12-16

Publications (1)

Publication Number Publication Date
WO2011082934A1 true WO2011082934A1 (fr) 2011-07-14

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WO (1) WO2011082934A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110564922A (zh) * 2019-09-19 2019-12-13 北京科技大学 一种改进的牙轮用钢淬火工艺

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011114764B4 (de) 2011-10-01 2016-04-21 Volkswagen Aktiengesellschaft Verfahren zur Herstellung formgehärteter Bauteile und Durchlaufofen zum Erwärmen einer zum Formhärten vorgesehenen Platine
DE102017110864B3 (de) 2017-05-18 2018-10-18 Voestalpine Metal Forming Gmbh Verfahren und Vorrichtung zum Erzeugen gehärteter Stahlblechbauteile mit unterschiedlichen Blechdicken
DE102017128574B3 (de) * 2017-12-01 2019-03-14 Ebner Industrieofenbau Gmbh Temperiereinheit für eine Ofenvorrichtung zum Wärmebehandeln einer Platine
DE102020133461A1 (de) * 2020-12-15 2022-06-15 Schwartz Gmbh Thermisches Behandeln von Bauteilen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20014361U1 (de) 2000-08-19 2000-10-12 Benteler Werke Ag B-Säule für ein Kraftfahrzeug
DE10208216C1 (de) * 2002-02-26 2003-03-27 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung eines metallischen Bauteils
EP1426454A1 (fr) 2002-12-03 2004-06-09 Benteler Automobiltechnik GmbH Procédé de fabrication d'une piéce de forme avec au moins deux régions de structure de ductilité differente et four continu associé
DE102006054389A1 (de) * 2006-11-17 2008-05-21 Voestalpine Automotive Holding Gmbh Verfahren zum gezielten Erzeugen einer definierten Härte und/oder einer definierten Festigkeit von pressgehärteten und/oder warmumgeformten und/oder direkt und/oder indirekt umgeformten Blechbauteilen
EP2110448A2 (fr) * 2008-04-17 2009-10-21 Schwartz, Eva Procédé et four à passage continu destinés au chauffage de pièces à usiner

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20014361U1 (de) 2000-08-19 2000-10-12 Benteler Werke Ag B-Säule für ein Kraftfahrzeug
DE10208216C1 (de) * 2002-02-26 2003-03-27 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung eines metallischen Bauteils
EP1426454A1 (fr) 2002-12-03 2004-06-09 Benteler Automobiltechnik GmbH Procédé de fabrication d'une piéce de forme avec au moins deux régions de structure de ductilité differente et four continu associé
DE102006054389A1 (de) * 2006-11-17 2008-05-21 Voestalpine Automotive Holding Gmbh Verfahren zum gezielten Erzeugen einer definierten Härte und/oder einer definierten Festigkeit von pressgehärteten und/oder warmumgeformten und/oder direkt und/oder indirekt umgeformten Blechbauteilen
EP2110448A2 (fr) * 2008-04-17 2009-10-21 Schwartz, Eva Procédé et four à passage continu destinés au chauffage de pièces à usiner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110564922A (zh) * 2019-09-19 2019-12-13 北京科技大学 一种改进的牙轮用钢淬火工艺

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