EP3676408A1 - Procédé pour chauffer une pièce métallique à une température finale et four à rouleaux correspondant - Google Patents

Procédé pour chauffer une pièce métallique à une température finale et four à rouleaux correspondant

Info

Publication number
EP3676408A1
EP3676408A1 EP18765599.8A EP18765599A EP3676408A1 EP 3676408 A1 EP3676408 A1 EP 3676408A1 EP 18765599 A EP18765599 A EP 18765599A EP 3676408 A1 EP3676408 A1 EP 3676408A1
Authority
EP
European Patent Office
Prior art keywords
temperature
zone
heating
plateau
component
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.)
Granted
Application number
EP18765599.8A
Other languages
German (de)
English (en)
Other versions
EP3676408B1 (fr
Inventor
Jörg Winkel
Andreas Reinartz
Frank WILDEN
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.)
Schwartz GmbH
Original Assignee
Schwartz GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schwartz GmbH filed Critical Schwartz GmbH
Publication of EP3676408A1 publication Critical patent/EP3676408A1/fr
Application granted granted Critical
Publication of EP3676408B1 publication Critical patent/EP3676408B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • C21D9/0056—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
    • 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
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/06—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated
    • F27B9/10—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated heated by hot air or gas
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path
    • F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path being carried by a conveyor
    • F27B9/2407—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path being carried by a conveyor the conveyor being constituted by rollers (roller hearth furnace)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D21/00—Arrangement of monitoring devices; Arrangement of safety devices
    • 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

Definitions

  • the present invention is a method for heating a pre-coated metallic component in a roller hearth furnace and a corresponding roller hearth furnace.
  • the inventive method can be used in particular in a press hardness line in which a roller hearth furnace a press hardening tool is arranged downstream.
  • the steel sheet which is regularly provided in the form of a board, is first heated in an oven such as a roller hearth furnace and then cooled in a press during forming and thereby cured
  • an oven such as a roller hearth furnace
  • the steel sheet is first heated to a temperature above the AC1 temperature, the temperature at which the formation of austenite begins during a warm-up process, or even above the AC3 temperature, prior to press-hardening.
  • the temperature at which the conversion of ferrite to austenite ends in a warm-up process, heated and then formed in the press-hardening process and thereby cooled accordingly (below the Martensitstarttemperatur).
  • the corresponding metallic components are coated regularly to improve properties of the metal.
  • coatings are used as aluminum and silicon (AISi) in order to be able to dispense with a protective gas during the heat treatment process and to be able to omit a surface after-treatment after the heat treatment, or also zinc coatings, which also improve corrosion resistance.
  • AISi aluminum and silicon
  • rapid heating of the components is desirable, since in a roller hearth furnace, a short furnace length can be achieved and, on the other hand, in process planning, there is more freedom with respect to the cycle times of the press adjacent to the heating.
  • the coating can be removed during transport through the furnace of the metallic component and so carried pollution of the furnace.
  • the inventive method for heating a metallic component to a target temperature wherein the component has a pre-coating and is passed through an oven having at least four zones, each of which can be tempered to an individual zone temperature, the component successively at least by a Anrobzone , a plateau zone, a peak heating zone and an end zone, wherein the heating zone is heated to a heating temperature, the plateau zone to a plateau temperature, the peak heating zone to a peak temperature and the end zone to a target temperature, the plateau temperature being selected to be the temperature of the component in the plateau zone lying in a corridor region around a melting temperature of the precoat is characterized by the peak temperature being at least 100 K [Kelvin], preferably at least 120 K, particularly preferably at least 140 K, above the target temperature ,
  • the metallic component is preferably a metallic blank, a steel sheet or an at least partially preformed semi-finished product, preferably of steel.
  • the metallic component is preferably with or from a (hardenable) steel, for example a boron (manganese) steel, for. B. with the name 22MnB5 formed.
  • the precoating can be, for example, a (predominantly) zinc-containing coating or a (primarily) aluminum and / or silicon-containing coating, in particular a so-called aluminum / silicon (Al / Si) coating.
  • the temperature control in the individual zones preferably takes place (exclusively) by means of radiant heat, for example by at least one electrically operated heating means (which does not physically and / or electrically contact the metallic component), such as a heating loop and / or a heating wire, for example. and / or at least one (gas-heated) jet pipe.
  • the metallic component is heated by means of radiant heat and / or convection in the individual zones.
  • the individual zones are preferably defined solely by the temperature which can be set in the zone by means of corresponding heating means.
  • the corresponding zones can also be structurally defined, for example by appropriate shielding means between the zones, which at least reduce or prevent the convection between adjacent zones and / or the introduction of radiant heat from one zone into an adjacent zone.
  • the heating temperature is preferably well below the target temperature. Further preferred is an embodiment in which the heating temperature above the plateau temperature.
  • the liquefaction of the pre-coating begins.
  • formation of a (stable) oxide layer on the liquefying precoat that can at least partially absorb the shearing forces during transport of the metallic component occurs.
  • adhesion of the molten or melted precoat on the rolls and penetration into them in this region of the furnace is substantially reduced or even avoided.
  • the plateau temperature is usually well below the target temperature, in particular more than 300 K below the target temperature or even more than 350 K below the target temperature.
  • the peak temperature is preferably even 150 K above the target temperature.
  • the heating temperature, the plateau temperature, the peak temperature and / or the target temperature are dependent on the material used of the metallic component, the type and / or thickness of the pre-coating and / or on the configuration, in particular the shape and / or thickness of the metallic component, predetermined.
  • the term "tempering" in the context of this document basically means “heating”.
  • the precoating is formed of a material comprising aluminum and silicon.
  • the metallic coating can be, for example, a (predominantly) zinc-containing coating or a (predominantly) aluminum and / or silicon-containing coating, in particular a so-called aluminum / silicon (Al / Si) coating.
  • this coating serves to protect the component against scaling during the heat treatment and prevents the edge decarburization.
  • Usual layer thicknesses are in the range between 10 and 50 ⁇ [microns], preferably in the range of 20 and 40 ⁇ .
  • the heating method according to the present invention is advantageous, since this precoat is very brittle at room temperature so that flaking and thus damage to the precoat can occur quickly if heated too quickly and too large Shearing stress during transport through the oven is present.
  • the inventive method allows the rapid heating of Al / Si precoated metallic components.
  • At least one intermediate zone is formed between the plateau zone and the peak heating zone, which is tempered to an intermediate zone temperature between the temperature of the previous zone and the peak temperature.
  • the intermediate heating zone in the transport direction of the metallic component through the oven is preferably shorter than the peak heating zone, in particular has a length which is smaller than half the length of the tip heating zone, preferably less than a quarter of the length of the tip heating zone.
  • the component is guided in the Anußzone on rollers which are formed of quartz material.
  • fused silica is meant in particular a material comprising silicon dioxide (SiO 2).
  • the metallic component which is significantly cooler, usually at substantially ambient or room temperature, is introduced into the atmosphere of the furnace, which is significantly hotter, for example 500 ° C or more.
  • the atmosphere of the furnace which is significantly hotter, for example 500 ° C or more.
  • rollers which are formed of a mullitischen ceramic material.
  • Rollers made of mulltitic ceramic material are preferably used when the temperature of the atmosphere in the furnace increases, since they have a higher permissible operating temperature than Quarzgutrollen. In addition, these roles are much cheaper.
  • a roller hearth furnace for heating a metallic component having a precoating to a target temperature, in particular according to a method according to one of the preceding claims, in which the component is mounted on rollers from an access through the roller hearth furnace to an exit feasible, further comprising at least four heating means, by each of which an individual temperature in a zone around the heating means is adjustable, and a control means for individually controlling at least four of the heating means.
  • the roller hearth furnace is characterized in that the control means is suitable and determined in a manner for controlling the heating means, that at least the following zones can be formed from the access to the outlet: a heating zone which can be heated to a heating temperature, which can be heated to a plateau temperature Plateau zone, a peak heating zone which can be tempered to a peak temperature and an end zone which can be heated to a final temperature, the
  • Control means and the heating means are suitable and determined to set a plateau temperature which is in a corridor range around a melting temperature of the precoat and to set a peak temperature which is at least 100 K above the target temperature.
  • Rollers made of quartz material are preferably arranged in the heating zone.
  • Preferred are in at least one of the following zones:
  • shielding means are preferably formed between at least two adjacent zones.
  • the shielding means are preferably designed as internals between at least one part of the individual zones, which narrow the furnace cross-section in this area. This reduces the longitudinal flow between adjacent zones.
  • the shielding means heat radiation from a zone in prevent the other zone and allow for a better definition of the temperature in the respective zones.
  • a temperature control unit can be arranged which specifically cools at least one subarea of the component and at the same time keeps or increases the temperature in at least one further subarea of the component so as to set a different strength in at least one subarea.
  • a method for press-hardening a metallic component is proposed in which a metallic component heated to the target temperature according to the present invention is subjected to press-hardening in a press-hardening device.
  • the metallic component is supplied between the heating and the press-hardening of at least one tempering unit, in which the temperature of at least one partial area of the metallic component is changed.
  • Fig. 1 is a roller hearth furnace, which is operated by the method according to the invention
  • FIG. 2 shows a temperature control in the roller hearth furnace
  • Fig. 4 is an example of a temperature guide according to the present invention.
  • Fig. 5 shows another example of a roller hearth furnace
  • Fig. 6 shows a first example of a device for heat treatment of
  • Fig. 7 shows a second example of a device for heat treatment of
  • FIG. 1 shows schematically a roller hearth furnace 1 in which a method for heating a metallic component 2 to a target temperature 3 is performed. The corresponding temperatures are shown schematically in FIG.
  • the metallic component 2 is guided through an access 4 in the roller hearth furnace 1.
  • the metallic component 2 is guided via rollers 5 through the roller hearth furnace 1 to the output 6.
  • the metallic component 2 has an Al / Si precoating 7, which is formed on the metallic component 2 in a planar manner and mostly on both sides. it is.
  • a heating zone 9, a plateau zone 10, a top heating zone 11 and an end zone 12 adjoin the access 4.
  • the heating zone 9 is at a heating temperature 13, the plateau zone 10 at the plateau temperature 14, the peak heating zone 11 to a peak temperature 15 and the end zone 12 to the target temperature 3 tempered (heated).
  • heating means 16 are formed, which are designed here as jet pipes.
  • the individual jet pipes each comprise gas burners which burn into a closed (ceramic) tube, so that the combustion exhaust gases are not introduced into the furnace in order to prevent the hydrogen embrittlement of the metal, which may be promoted by the exhaust gases of the combustion, in particular of moist exhaust gas.
  • the individual heating means 16 are shown by way of example in their number and design. This means that in each zone 9, 10, 11, 12, a different number of heating means 16, each heating means 16 of different thickness and / or each different heating means 16 such as partially electric heating means 16 and partially jet pipes may be formed as a heating means 16.
  • the rollers 5 which may be formed in each zone 9, 10, 11, 12 in different numbers and / or at different distances and / or from different materials.
  • the heating means 16 are connected to a control means 17, by which the operation of the heating means 16 can be controlled or regulated and which is suitable and determined for the corresponding control of the heating means 16.
  • at least individual (driven) rollers 5 may be connected to the control means 17.
  • the shielding means 27 are formed, which in particular reduce or prevent longitudinal flow between adjacent zones 9, 10, 11, 12.
  • the shielding means 27 can be designed so that they radiate heat between adjacent zones 9, 10, 1 1, 12 reduce or prevent.
  • the shielding means 27 are formed in the present example as the open cross-section of the roller hearth furnace 1 reducing internals whose height can vary.
  • the rollers 5 are formed in the Anußzone 9 of a fused silica, while the rollers in the plateau zone 10, the Spitzensortzone 1 1 and the end zone 12 are formed of a ceramic material.
  • the rollers 5 in the Anußzone 9 are preferably formed of quartz material to here the thermal loads of the rollers 5 due to the large temperature difference of the (hot) rollers 5 and the (cold) metallic component 2 can accommodate.
  • the heating means 16 are regulated, for example, in such a way that a component formed from a Boron-manganese steel marketed as "Usibor 1500" or "MBW 1500 + AS", which has an Al / Si precoating 7, in the heating zone 9
  • Anußtemperatur 13 a temperature of about 840 to 860 ° C, in particular of 850 ° C, as the plateau temperature 14 in the Plateauzone 10 a temperature of about 630 ° C to 670 ° C, in particular of 650 ° C with a corridor range of +/- 20 ° C around the melting temperature of the pre-coating 7, as a peak temperature in the tip heating zone 1 1 a temperature of about 1080 to 1120 ° C, in particular of 1100 ° C and as target temperature 3 in the end zone 12 a temperature of 870 to 940th ° C is set.
  • FIG. 3 shows a temperature curve assumed to be known, in which the zone temperature 18 and the component temperature 19 are plotted. Again, several zones are formed.
  • the (cold) metallic component 2 first passes through a heating zone with a heating zone temperature 13, then a plateau zone with a plateau temperature 14 and then an end zone with a target temperature 3.
  • the component temperature 19 follows a curve from a starting temperature to the target temperature 3.
  • 4 shows an example of a temperature profile with zone temperature 18 and component temperature 19 according to the method proposed here.
  • the zone temperature also shows peak heating zone 11. If component temperature 19 in this example is compared with component temperature 19, as shown in FIG. 3, then it can be seen that the component temperature 19 in the method proposed here faster reaches the target temperature 3 than in the known as known method as shown in Fig. 3.
  • FIG. 4 and 5 which shows a further embodiment of a roller hearth furnace 1, further show the formation of intermediate zones.
  • a first intermediate zone 20 is formed whose first intermediate zone temperature 21 lies between the heating temperature 13 and the plateau temperature 14.
  • the zone temperature 18 in FIG. 4 shows two second intermediate zones 22 between the plateau zone 10 and the peak heating zone 11, which have two second intermediate zone temperatures 23.
  • FIG. 6 shows a device 24 for heat treatment of a metallic component 2 with a roller hearth furnace 1 and a press hardening unit 25.
  • the target temperature 3 it is possible to select the target temperature 3 to be at or above the AC1 temperature (that is, the temperature at which the formation of austenite starts in a warm-up operation), or even above the AC3 temperature (the temperature at which the conversion of Ferrite in austenite ends in a warm-up process) of the corresponding material of the metallic component 2, that during subsequent press-hardening at least a proportion of martensite is formed in the metallic component.
  • the AC1 temperature that is, the temperature at which the formation of austenite starts in a warm-up operation
  • the AC3 temperature the temperature at which the conversion of Ferrite in austenite ends in a warm-up process
  • At least one tempering unit 26 is formed between the roller hearth furnace 1 and the press hardening unit 25 (see FIG. 7), which makes it possible to temper areas of the metallic component 2 differently, in particular to heat partial areas, after the (uniform) heating of the metallic component 2 in the roller hearth furnace 1 and cool other sections.
  • a process management can be selected in which the target temperature 3 is selected so that it is below the AC3 or even ACl temperature and then in a following temperature control unit 26 in at least a portion of the metallic component 2, the temperature on the ACl - or AC3 temperature is increased, while the temperature is left in at least one other portion of the metallic component 2 below the ACl or AC3 temperature.
  • metallic components 2 can be produced which have areas of different microstructures or strengths after press hardening.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Tunnel Furnaces (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Control Of Heat Treatment Processes (AREA)
  • Coating With Molten Metal (AREA)

Abstract

L'invention concerne un procédé pour chauffer une pièce métallique (2) à une température finale (3), dans lequel la pièce (2) présente une précouche (7) et est dirigée dans un four (1) présentant au moins quatre zones (9, 10, 11, 12) dont la température peut être régulée à une température de zone individuelle (13, 14, 15, 3), la pièce (2) étant dirigée successivement au moins dans une zone d'allumage (9), une zone de plateau (10), une zone de chauffage maximal (11) et une zone finale (12), la zone d'allumage (9) étant régulée à une température d'allumage (13), la zone de plateau (10) étant régulée à une température de plateau (14), la zone de chauffage maximal (11) étant régulée à une température maximale (15) et la zone finale (12) étant régulée à la température finale (3), la température de plateau (14) étant choisie de manière à ce que la température de la pièce (2) dans la zone de plateau (10) se situe dans une zone couloir à une température de fusion de la précouche (7). Le procédé est caractérisé en ce que la température maximale (15) est au moins 100 K [kelvin] au-dessus de la température finale (3).
EP18765599.8A 2017-09-01 2018-08-31 Procédé pour chauffer une pièce métallique à une température finale et four à rouleaux correspondant Active EP3676408B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017120128.9A DE102017120128A1 (de) 2017-09-01 2017-09-01 Verfahren zum Erwärmen eines metallischen Bauteils auf eine Zieltemperatur und entsprechender Rollenherdofen
PCT/EP2018/073474 WO2019043161A1 (fr) 2017-09-01 2018-08-31 Procédé pour chauffer une pièce métallique à une température finale et four à rouleaux correspondant

Publications (2)

Publication Number Publication Date
EP3676408A1 true EP3676408A1 (fr) 2020-07-08
EP3676408B1 EP3676408B1 (fr) 2022-07-13

Family

ID=63517867

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18765599.8A Active EP3676408B1 (fr) 2017-09-01 2018-08-31 Procédé pour chauffer une pièce métallique à une température finale et four à rouleaux correspondant

Country Status (9)

Country Link
US (1) US11584972B2 (fr)
EP (1) EP3676408B1 (fr)
CN (1) CN111108221A (fr)
DE (1) DE102017120128A1 (fr)
ES (1) ES2926293T3 (fr)
HU (1) HUE059961T2 (fr)
MX (1) MX2020002291A (fr)
PL (1) PL3676408T3 (fr)
WO (1) WO2019043161A1 (fr)

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DE102020106139A1 (de) * 2020-03-06 2021-09-09 Schwartz Gmbh Thermisches Behandeln eines Bauteils
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RU2014103103A (ru) * 2011-06-30 2015-08-10 Эбнер Индустриофенбау Гмбх Способ нагрева фасонной детали для последующей закалки под прессом, а также проходная печь для зонного нагрева подогретой до заданной температуры фасонной детали до более высокой температуры
DE202012013282U1 (de) * 2012-09-04 2015-11-20 Schwartz Gmbh Tragmittel für Öfen
DE102012221120B4 (de) * 2012-11-19 2017-01-26 Kirchhoff Automotive Deutschland Gmbh Rollenherdofen und Verfahren zur Wärmebehandlung von metallischen Blechen
DE102013107870A1 (de) * 2013-07-23 2015-01-29 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung von Formbauteilen sowie Formbauteil und Durchlaufofen
DE102013015347A1 (de) * 2013-09-17 2015-03-19 Schuler Pressen Gmbh Ofen zur Erwärmung eines Stahlblechs
PL2905346T3 (pl) * 2014-01-23 2021-03-08 Schwartz Gmbh Sposób obróbki cieplnej
DE102014205061A1 (de) 2014-03-19 2015-09-24 Contitech Luftfedersysteme Gmbh Hydraulische Buchse
WO2016001701A1 (fr) * 2014-07-03 2016-01-07 Arcelormittal Ligne de traitement polyvalent pour traitement thermique et plaquage par immersion à chaud d'une bande d'acier
DE102014110415B4 (de) * 2014-07-23 2016-10-20 Voestalpine Stahl Gmbh Verfahren zum Aufheizen von Stahlblechen und Vorrichtung zur Durchführung des Verfahrens
EP3144620A1 (fr) * 2015-09-18 2017-03-22 Schwartz GmbH Installation de traitement thermique
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
WO2017129600A1 (fr) * 2016-01-25 2017-08-03 Schwartz Gmbh Procede de traitement thermique d'un élément métallique

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EP4074845A1 (fr) * 2021-04-16 2022-10-19 Aerospace Transmission Technologies GmbH Dispositif de commande et procédé de commande d'une installation de trempe à la presse

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PL3676408T3 (pl) 2022-11-21
US11584972B2 (en) 2023-02-21
US20210155996A1 (en) 2021-05-27
MX2020002291A (es) 2020-07-13
HUE059961T2 (hu) 2023-01-28
CN111108221A (zh) 2020-05-05
EP3676408B1 (fr) 2022-07-13
DE102017120128A1 (de) 2019-03-07
WO2019043161A1 (fr) 2019-03-07
ES2926293T3 (es) 2022-10-25

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