WO2017129600A1 - Procede de traitement thermique d'un élément métallique - Google Patents

Procede de traitement thermique d'un élément métallique Download PDF

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Publication number
WO2017129600A1
WO2017129600A1 PCT/EP2017/051508 EP2017051508W WO2017129600A1 WO 2017129600 A1 WO2017129600 A1 WO 2017129600A1 EP 2017051508 W EP2017051508 W EP 2017051508W WO 2017129600 A1 WO2017129600 A1 WO 2017129600A1
Authority
WO
WIPO (PCT)
Prior art keywords
component
furnace
nozzle
temperature
subregion
Prior art date
Application number
PCT/EP2017/051508
Other languages
German (de)
English (en)
Inventor
Andreas Reinartz
Jörg Winkel
Frank WILDEN
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
Priority claimed from DE102016201025.5A external-priority patent/DE102016201025A1/de
Priority claimed from DE102016201024.7A external-priority patent/DE102016201024A1/de
Priority claimed from DE102016201936.8A external-priority patent/DE102016201936A1/de
Priority claimed from DE102016202766.2A external-priority patent/DE102016202766A1/de
Priority claimed from DE102016118253.2A external-priority patent/DE102016118253A1/de
Application filed by Schwartz Gmbh filed Critical Schwartz Gmbh
Priority to CN201780008164.0A priority Critical patent/CN109072330A/zh
Priority to EP17703343.8A priority patent/EP3408420A1/fr
Priority to US16/072,633 priority patent/US20190024203A1/en
Publication of WO2017129600A1 publication Critical patent/WO2017129600A1/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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/667—Quenching devices for spray 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
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/84—Controlled slow cooling
    • 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
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/001—Austenite
    • 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

Definitions

  • the invention relates to a method for heat treatment of a metallic component.
  • the invention finds particular application in the partial curing of optionally precoated.
  • B. A- and B-pillars, side impact protection in doors, Schw eller, frame parts, bumper, cross member for floor and roof, front and rear side members to provide that have different strengths in sub-areas, so that the body part can fulfill partially different functions.
  • the center area of a B pillar of a vehicle should have high strength to protect the occupants in the event of a side impact.
  • the upper and lower end portions of the B-pillar should have a comparatively low strength in order to accommodate deformation energy during a side impact and to allow easy assembly with other body components during assembly of the B-pillar.
  • the hardened component To form such a partially hardened body component, it is necessary for the hardened component to have different material properties or strength properties in the subregions.
  • To set different Materiaige Shege or strength properties after curing for example, to be hardened steel sheet already provided with different interconnected sheet metal sections or partially cooled in the press partially different.
  • a method for the heat treatment of a metallic component is to be specified, which allows an industrial scale, in particular possible most efficient feasible partially different heat treatment of the component.
  • the method should in particular contribute to reducing the influence of the process section of the heat treatment process upstream of the press on the cycle time of the entire heat treatment process.
  • a first (more ductile part in the finished component) of the component is convective by means of at least one nozzle discharging a fluid flow towards the first portion cooled, so that a temperature difference of at least 100 K [Kelvin] is set between the at least one first portion and at least one second (in the finished treated component compared to harder) portion of the component, wherein the at least one nozzle with an overpressure of at least 2 bar is operated.
  • the proposed method is used in particular for the targeted component-specific thermal treatment of a (steel) component or for the targeted setting of different microstructures in different subregions of a steel component.
  • the method is used for partial curing of optionally precoated components of a (high-strength) manganese-boron Stahi.
  • the cooling of the at least one first subregion of the component by at least one nozzle operated with an overpressure of at least 2 bar allows in a particularly advantageous manner for the at least one first subregion of the component to be cooled down very rapidly by at least 100 K, in particular so fast that a cooling time is less than or equal to a cycle time at a downstream press hardening tool (press cycle).
  • such short cooling times can not be achieved with blowers which are used to generate a (cooling)
  • Air stream can be used towards a component surface.
  • a cooling time in which the at least one first subregion of the component is cooled ceremonily or by means of the nozzle is preferably less than fifteen seconds, in particular less than ten seconds or even less than five seconds or particularly preferably less than three seconds.
  • the metallic component is preferably a metallic board, a steel sheet or an at least partially preformed semi-finished product.
  • the metallic component is preferably with or from a (hardenable) steel, for example a boron (manganese) steel, for. B. with the name 22MnB5 formed. More preferably, the metallic component is at least for the most part provided with a (metallic) coating or precoated.
  • the metallic coating may 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.
  • the at least one nozzle is preferably arranged in a tempering station, wherein the tempering station is particularly preferably arranged downstream of a first furnace and / or upstream of a second furnace.
  • the at least one nozzle in particular a nozzle outlet of the nozzle, can be aligned towards the first subregion.
  • the at least one nozzle, in particular a nozzle inlet of the nozzle can be connected to a Fiuidán.
  • the fluid source may be a tank in which the fluid forming the fluid stream is stored compressed.
  • the fluid may be, for example, compressed air, nitrogen, water or a mixture thereof.
  • the fluid is preferably compressed air and / or the fluid flow is a (pressure) air flow.
  • the at least one nozzle is preferably at least one compressed-air nozzle.
  • the at least one nozzle is preferably operated with compressed air.
  • the at least one nozzle in particular a nozzle inlet of the nozzle, can be connected to at least one compressor.
  • providing compressed air with a Overpressure of at least 2 bar by means of at least one compressor can be supplied to the at least one nozzle. This can be done before, simultaneously and / or at least partially parallel to the cooling by means of the at least one nozzle. If multiple nozzles are provided, they may be connected to a common compressor.
  • the compressor is provided and arranged to supply at least one Druckiii ftdüse compressed air with an overpressure of at least 2 bar.
  • the compressor can provide, for example, a (system) overdrawer of at least 2 bar, which is preferably stored or stored in a pressure (air) store.
  • a (corresponding) pressure accumulator is arranged in a pipeline system connecting the compressor to the at least one pressure air nozzle and / or connected to the pipeline system between the compressor and the at least one compressed air nozzle.
  • At least one controllable valve can be arranged between the compressor and the at least one compressed air nozzle, which valve is actuated, in particular opened and closed, in accordance with a desired cooling time and / or a desired (compressed air) volume flow.
  • the (each) nozzle is shaped in the manner of a flat jet nozzle. More preferably ind provided a plurality of nozzles, which are particularly preferably arranged to a nozzle array. In particular, the shape of the nozzle field and / or the arrangement of the plurality of nozzles adapted to the (to be achieved) geometry of the at least one first portion of the component.
  • the cooling is carried out by means of a plurality, in particular by means of at least five or even at least ten nozzles, which can be controlled individually or in groups, in particular with a (specific) fluid Voiumenstrom can be applied.
  • the nozzles are controlled time-dependent.
  • the nozzles are controlled in such a way (individually or in groups) that specifically one or more temperature changes are set between partial regions of the component, for instance between the at least one first partial region and the at least one second partial region.
  • the nozzles can be controlled in such a way (individually or in groups) that in the temperature control station targeted environmental influences, which can act on the component after leaving the tempering station, are compensated.
  • Such a compensation which is to be understood in particular as a prevention, can for example be such that a further lying on the edge region of the component, in particular a further lying on the component edge region of the at least one first portion, less cooled than one compared further away from the edge lying portion of the component, in particular as an edge of the component lying edge of the at least a first portion of the component, so as to take place after leaving the tempering, especially in heat exchange with the environment faster cooling of the component in the edge regions to take into account or even (essentially) to compensate.
  • the component has partially different (component) temperatures, wherein a temperature difference between a first temperature of the at least one first partial region and a second temperature of the at least one second partial region of the component is set.
  • several (different) temperature differences between subregions of the component can be adjusted. For example, it is possible to set three or more subregions in the component with mutually different temperatures.
  • the partially different temperatures can lead to different microstructures or strength properties occurring in the component, in particular during an optionally subsequent quenching, such as during a molding process.
  • the at least one nozzle is operated with an overpressure of at least 2 bar, preferably of at least 2.5 bar, more preferably of at least 3.5 bar or even of at least 5 bar.
  • a fluid forming the fluid flow, in particular during a cooling time, at a nozzle inlet of the at least one nozzle has an overpressure of at least 2 bar, preferably at least 2.5 bar, more preferably at least 3.5 bar or even at least 5 bar ,
  • the overpressure with which the at least one nozzle is operated can relate in particular to the pressure reserve stored or stored in the pressure accumulator.
  • Under an overpressure here is a pressure to understand, which is determined relative to the ambient pressure or atmospheric pressure.
  • the Fiuidstrom can be accelerated.
  • the fluid flow exits the at least one nozzle at an exit velocity of approximately sound velocity.
  • the fluid flow discharged by means of the at least one nozzle exerts on a component surface of the component in the at least one first partial region of the component a blow pressure of at least 3000 Pa [Pascal] or N / m 2 [Newton per square meter].
  • a cooling rate of at least 100 K / s [Kelvin per second] is set.
  • At least the at least one first subregion of the component is heated by at least 500 K, preferably by at least 600 K or even by at least 800 K, before cooling.
  • the at least one first portion of the component is heated prior to cooling mitteis the at least one nozzle in a first furnace and / or by means of radiant heat and / or convection.
  • the cooling takes place by means of the at least one nozzle in a tempering station arranged downstream of a first furnace.
  • At least the at least one first subregion of the component after cooling be heated by at least 100 K, preferably by at least 150 K or even by at least 200 K.
  • the at least one first portion of the component is heated after cooling by means of the at least one nozzle in a second furnace and / or by means of radiant heat and / or convection.
  • the second oven is arranged downstream of the temperature control station.
  • step a) convective (partial) cooling of at least a first portion of the component in the tempering station by means of at least one nozzle discharging a Fiuidstrom toward the first portion, wherein a Tem perat u rd i fferen z between the at least one first portion and at least a second Part of the component is set and wherein the at least one nozzle is operated with an overpressure of at least 2 bar.
  • the indicated sequence of process steps a), b) and c) results in a regular course of the process. Individual or several of the method steps can be carried out simultaneously, successively and / or at least partially in parallel.
  • step a) the (entire) component is heated in a first furnace.
  • the component is homogenously or uniformly dissolved in the first furnace.
  • the component in the first furnace by means of radiant heat, for example by at least one electrically operated (the component not physically or electrically contacting) heating element, such as a heating loop and / or a heating wire, and / or at least one (gas-heated) Heated jet pipe.
  • the first furnace may be a continuous furnace or a chamber furnace.
  • the component in particular moved from the first furnace in a tempering.
  • a transport device for example comprising at least a roller table and / or an (industrial) robot can be provided.
  • the component preferably covers a distance of at least 0.5 m [meter] from the first furnace to the temperature control station. In this case, the component can be carried out in contact with the ambient air or within a protective atmosphere.
  • step c) at least a first subregion of the component in the temerary station (active) is cooled.
  • heat energy is introduced into the at least one second subregion of the component.
  • the at least one second subregion of the component in the tempering station is (exclusively) subjected to heat radiation, which is arranged, for example, by at least one electrically operated or heated, in particular in the tempering, (not contacting the component) heating element, such as a heating loop and / or a heating wire, and / or at least one, in particular in the tempering arranged, (gas-heated) jet pipe is generated and / or emitted.
  • heat radiation which is arranged, for example, by at least one electrically operated or heated, in particular in the tempering, (not contacting the component) heating element, such as a heating loop and / or a heating wire, and / or at least one, in particular in the tempering arranged, (gas-heated) jet pipe is generated and / or emitted.
  • the introduction of heat energy into the at least one second subregion of the component may preferably be carried out in the tempering station in such a way that a temperature decrease of the temperature of the at least one second subregion and / or an arc whirling of the at least one second subregion during the Whereabouts of the component in the tempering station is at least reduced.
  • This decay renshold ru ng is particularly advantageous if the component in step a) heated to a temperature above the AC3 temperature has been.
  • the introduction of heat energy into the at least one second subregion of the component in the tempering station can take place in such a way that the at least one second subregion of the component is (distinctively) heated, in particular heated by at least about 50. This procedure is particularly advantageous if the component was heated in step a) to a temperature below the AC3 temperature or even below the AC1 temperature.
  • the method further comprises at least the following steps:
  • the component is moved by the temperature control in a second oven.
  • a transport device for example comprising at least a roller table and / or a (industrial) robot can be provided.
  • the component preferably travels a distance of at least 0.5 m from the tempering station to the second furnace.
  • the component can be guided in contact with the ambient air or within a protective atmosphere.
  • the component is moved directly after removal from the tempering directly into the second oven.
  • the second furnace may be a continuous furnace or a chamber furnace.
  • step e) at least the at least one first subregion of the component in the second furnace is heated by at least 100 K, preferably by at least 150 K or even by at least 200 K.
  • a renewed heating process at least the previously (actively) cooled at least a first portion is heated by at least 100.
  • At least the at least one first subregion of the component in the second furnace is preferably (exclusively) by means of radiant heat, for example by at least one electrically operated heating element (not contacting the component), such as a heating loop and / or a heating wire, and / or at least one ( Gas-heated) jet pipe heated.
  • the at least one second subregion of the component in the second furnace is at least 50 K, more preferably at least 70 K or even at least 100 K. , in particular (exclusively) medium radiant heat, warmed.
  • the at least one second portion of the component is heated to a temperature above the AC1 temperature or even above the AC3 temperature.
  • step e) an input of heat energy, in particular by means of radiant heat, in the entire component take place.
  • the second furnace for this purpose
  • the introduction of heat energy into the at least one first subregion of the component preferably takes place in the second furnace such that the temperature of the at least one first subregion is at least 100 K, preferably around at least 120 K, more preferably at least 1 50 or even increased by at least 200 K.
  • the introduction of heat energy into the at least one second subregion of the component can preferably take place in the second furnace such that a temperature decrease of the temperature of the at least one second subregion and / or a cooling off of the at least one second subregion during the fate of the Component is at least reduced in the second furnace.
  • This decay point is particularly advantageous when the component has been heated in step a) to a temperature above the AC3 temperature.
  • the introduction of heat energy into the at least one second subregion of the component in the second furnace can take place such that the at least one second subregion of the component at least (clearly) heats up, in particular by at least 50 K., more preferably by at least 70 K or even by at least 100 K; and / or heated to a temperature above the AC 1 temperature or even above the AC3 temperature.
  • This method is particularly advantageous when the component has been heated in step a) to a temperature below the AC3 temperature or even below the AC1 temperature.
  • the method further comprises at least the following steps:
  • the movement preferably takes place in step f) by means of a transport device, for example at least comprising a roller table and / or an (industrial) robot.
  • a transport device for example at least comprising a roller table and / or an (industrial) robot.
  • the component lays from the second furnace to the Press hardening tool a distance of at least 0.5 m back. In this case, the component in contact with the ambient air or within a
  • Protective atmosphere are performed.
  • the component is spent directly after removal from the second oven directly into the press-hardening tool.
  • the component rode in rope a) is heated to a temperature below the AC3 temperature or even below the AC 1 temperature.
  • the ACT temperature is the temperature above which the flow starts from ferrite to austenite upon heating of a metallic component, especially a steel component.
  • the component is heated in step a) to a temperature above the AC3 temperature.
  • the AC3 temperature is the temperature at which the
  • the at least one first subarea in step c) is cooled convectively to a temperature below the AC 1 temperature.
  • the at least one first portion in step c), in particular convective to a temperature below 550 ° C [° Celsius] (823.15 K), more preferably below 500 ° C (773.1 5 K) or even below 450 ° C (723, 1 5 K) cooled.
  • a method for (partially different) heat treatment of a metallic component with at least the following steps could also serve to achieve the stated object (s):
  • a device for heat treatment of a metallic component which comprises at least:
  • a first furnace which can be heated in particular by means of radiant heat and / or convection
  • a tempering station arranged downstream of the first furnace, in which at least one nozzle is arranged or held, which is used for discharging a fluid for cooling at least a first subregion of the component is provided and set up, in particular so that a temperature difference between the at least one first portion and at least a second portion of the component is adjustable, wherein the at least one nozzle is preferably provided and adapted to be operated with an overpressure of at least 2 bar,
  • Radiant heat and / or convection heatable second furnace which is provided and adapted to heat at least the at least a first portion of the component by at least 100 K.
  • the device can serve to carry out a method presented here.
  • the device is preferably provided and set up for carrying out a method presented here.
  • the device is associated with an electronic control unit which is suitable and arranged for carrying out a method proposed here.
  • the control unit particularly preferably has at least one program-controlled microprocessor and an electronic memory in which a control program is stored, which is provided and set up to execute a method proposed here.
  • the first furnace or the second furnace is a continuous furnace or a chamber furnace.
  • the first furnace is a continuous furnace, in particular a roller hearth furnace.
  • the second furnace is a continuous furnace, in particular a roller hearth furnace, or a chamber furnace, in particular a multilayer chamber furnace. with at least two superimposed chambers.
  • the second furnace preferably has a furnace interior, in particular (exclusively) which can be heated by means of radiant heat, preferably in the furnace interior a nearly uniform internal temperature is adjustable.
  • a plurality of such furnace interior spaces may be present, corresponding to the number of chambers.
  • Radiation heat sources are preferably arranged in the first furnace and / or in the second furnace (exclusively).
  • at least one electrically operated (component non-contacting) heating element such as at least one electrically operated heating loop and / or at least one electrically operated heating wire is arranged in a furnace interior of the first furnace and / or in a furnace interior of the second furnace.
  • at least one in particular gas-heated jet pipe can be arranged in the furnace interior of the first furnace and / or the furnace interior of the second furnace.
  • a plurality of risers 1 or 10 are arranged, in each of which at least one gas burner burns.
  • the inner region of the steel tubes, into which the gas burners burn in is atmospherically separated from the furnace interior, so that no combustion gas or exhaust gases can enter the interior of the furnace and thus influence the furnace atmosphere.
  • Such an arrangement is also referred to as "indirect gas heating".
  • At least one nozzle is arranged or held, which is provided and arranged for discharging a fluid.
  • the at least one nozzle can be operated with an overpressure of at least 2 bar.
  • the device can furthermore, in particular for providing the overpressure, have at least one compressor, which is preferably associated with the temperature control station.
  • the compressor can with the at least one nozzle, in particular with a nozzle inlet of the nozzle (fluidically) be connected.
  • the device has at least one pressure (air) memory which is provided and arranged to hold or store pressure provided by means of the compressor.
  • the pressure accumulator is assigned to the temperature control station.
  • the pressure accumulator is disposed in a pipe connecting the compressor to the at least one compressed air nozzle, and / or connected to the piping system between the compressor and the at least one compressed air nozzle.
  • the compressor is preferably provided and adapted to provide the fluid stream forming fluid at an overpressure of at least 2 bar.
  • the compressor is preferably a reciprocating compressor, a rotary compressor, in particular a screw compressor, or a turbo-compressor, which is particularly preferably designed with a plurality of rotatably drivable blades (at least one impeller) and a plurality of stationary blades (at least one stator) ,
  • a source for a pressurized fluid can be provided, which can be connected to the at least one nozzle v.
  • This is preferably a source in which a liquified gas is vaporized, for example via a corresponding heat exchanger which, for example, effects evaporation of the liquefied gas (for example liquefied nitrogen) in ambient air.
  • the vaporized gas may then preferably be supplied to a compressor to increase the pressure, sol lte the gas pressure at the outlet of the source le be too low.
  • At least one heater is disposed in the temperature control station (moreover).
  • the heater is provided in and disposed of in response to heat energy into the heater enter at least a second portion of the component.
  • the heating device is arranged and / or aligned in the tempering station such that the introduction of thermal energy into the at least one second subregion of the component can be carried out simultaneously or at least partially parallel to the cooling of the at least one first subregion of the component by means of the at least one nozzle ,
  • the heating device preferably comprises (at least) at least one grid heater and one heat exchanger.
  • the at least one transformer 1 is not heated with at least one electrically operated heating element (not contacting the component), such as at least one electrically operated heating loop and / or at least one electrically operated heating wire.
  • at least one gas-heated jet pipe can be provided as the jet as a jet.
  • the apparatus may include a press hardening tool downstream of the second furnace. The press-hardening tool is in particular provided and arranged to simultaneously or at least partially reshape the component and to quench it (at least partially).
  • the details, features and advantageous embodiments discussed in connection with the method can accordingly also occur in the case of the device presented here and vice versa. In that regard, reference is made in full to the statements there for a more detailed characterization of the features.
  • the use of at least one nozzle operated with an overpressure of at least 2 bar for the convective cooling of at least one first portion of a metallic component is proposed, wherein the nozzle is used such that a temperature difference of at least 100 K between the at least one first portion and at least a second portion of the component is set.
  • Fig. 1 a diagram of a device with which an inventive
  • FIG. 2 is a detail view of the device of FIG. 1,
  • Fig. 3 can be achieved by means of a method according to the invention
  • Fig. 4 shows another mitteis a method according to the invention achievable temperature-time course.
  • 1 schematically shows a device 12 for heat treatment of a metallic component 1 with which a method according to the invention can be carried out.
  • the device 12 has a first furnace 7, a tempering station 8, a second furnace 9 and a press hardening tool 1 1.
  • the device 12 represents a hot forming line for press hardening.
  • the tempering station 8 is (directly) arranged downstream of the first furnace 7 so that a component 1 to be treated by means of the device 12 can be brought directly into the tempering station 8 after leaving the first furnace 7. Further, the two kiln 9 of the tempering station 8 and the press hardening tool 1 1 are arranged downstream of the second kiln 9 (directly).
  • FIG. 2 schematically shows a detail view of the device from FIG. 1.
  • FIG. In Fig. 2, the temperature control 8 of the apparatus of Fig. 1 is illustrated in more detail.
  • a nozzle 3 is arranged, which discharges a Fiuidstrom 4 toward a first portion 2 of the component in order to cool this first portion 2 convectively (active).
  • the nozzle 3 is operated by way of example with an overpressure of 5 bar.
  • the nozzle is cinktss character connected to a compressor 1 3.
  • a heating device 1 1 is arranged in the tempering 8, which is provided for registering v of thermal energy in a two-part 6 of the component 1 and set up.
  • the heating is performed by way of example as an electrically operable heating wire.
  • FIG. 3 shows diagrammatically a telemetering unit which can be achieved by means of a method according to the invention.
  • the temperature T of the metallic component or the temperatures T of the at least one first partial region and of the at least one second partial region of the component is plotted over the time t.
  • the metallic component 1 is first uniformly heated to a temperature below the AC 1 temperature until the time t i. This heating takes place here by way of example in a first furnace 2.
  • the metallic component is transferred from the first furnace to a tempering station.
  • the component temperature for example, by heat loss to the environment easily decrease.
  • At least a first portion of the component in the temperature control (active) is cooled. This is illustrated in FIG. 3 on the basis of the lower temperature-time profile between the times t 2 and t 3 .
  • at least a second portion of the component in the tempering (light) is heated. This is illustrated in FIG. 3 on the basis of the upper temperature-time profile between times t 2 and t 3 .
  • a temperature difference 5 is set between the at least one first partial region and at least one second partial region of the component.
  • the component is transferred from the tempering station into a second oven different from the first oven.
  • the set in the tempering partially different temperatures, for example, by heat loss to the environment can easily decrease.
  • the component is heated in the second furnace such that the temperature of the at least one first portion of the component is increased by at least 150 K.
  • the heating takes place in the second oven such that at the same time the temperature of the at least one second portion of the component is brought to a temperature above the AC3 temperature.
  • the component is transferred from the second furnace to a press hardening tool.
  • the set in the second furnace partially different temperatures, for example, by heat loss to the environment can easily decrease.
  • Fig. 4 shows schematically another educable by a method according to the invention temperature-time course.
  • the metallic component is uniformly heated to a temperature above the AC3 temperature until time ti. This heating takes place here by way of example in a first oven.
  • the metallic component is transferred from the first furnace to a tempering station. In this case, the component temperature can easily decrease.
  • the temperature control active
  • FIG. 4 shows schematically another educable by a method according to the invention temperature-time course.
  • FIG. 4 shows that a temperature difference 5 is set in the tempering station between the at least one first partial area and at least one second partial area of the component. Between the Zeilticianen t 3 and the component is transferred from the tempering in a different from the first oven second oven.
  • the set in the temperature control partially different temperatures can easily decrease.
  • the component is heated in the two-way oven such that the temperature of the at least one first portion of the component is increased by at least 150 K.
  • the heating in the second furnace is de art that at the same time an A bk h ugh yogai gk with the at least one second portion of the component, compared to a A bk h h 1 speed reduced during heat transfer to the environment.
  • the component is transferred from the second furnace to a press hardening tool.
  • a press hardening tool In the second oven adjusted, partially different temperatures, for example, by #3abgabc to the environment easily decrease.

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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 thermique d'un élément métallique. L'invention concerne notamment une application dans le cas d'un durcissement partiel d'éléments réalisés dans un acier manganèse-bore hautement résistant et éventuellement dotés préalablement d'un revêtement. Lors de ce procédé, au moins une première zone partielle (2) de l'élément (1) est refroidie par convection à l'aide d'au moins une buse (3) qui délivre un flux de fluide (4) en direction de la première zone partielle (2), de manière à régler une différence de température (5) d'au moins 100 K entre l'au moins une première zone partielle (2) et au moins une deuxième zone partielle (6) de l'élément (1), l'au moins une buse (3) fonctionnant avec une pression positive d'au moins 2 bar.
PCT/EP2017/051508 2016-01-25 2017-01-25 Procede de traitement thermique d'un élément métallique WO2017129600A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201780008164.0A CN109072330A (zh) 2016-01-25 2017-01-25 用于金属部件的热处理的方法
EP17703343.8A EP3408420A1 (fr) 2016-01-25 2017-01-25 Procede de traitement thermique d'un élément métallique
US16/072,633 US20190024203A1 (en) 2016-01-25 2017-01-25 Method for heat treatment of a metal component

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
DE102016201025.5A DE102016201025A1 (de) 2016-01-25 2016-01-25 Wärmebehandlungsverfahren und Wärmebehandlungsvorrichtung
DE102016201025.5 2016-01-25
DE102016201024.7A DE102016201024A1 (de) 2016-01-25 2016-01-25 Wärmebehandlungsverfahren und Wärmebehandlungsvorrichtung
DE102016201024.7 2016-01-25
DE102016201936.8 2016-02-09
DE102016201936.8A DE102016201936A1 (de) 2016-02-09 2016-02-09 Wärmebehandlungsverfahren und Wärmebehandlungsvorrichtung
DE102016202766.2 2016-02-23
DE102016202766.2A DE102016202766A1 (de) 2016-02-23 2016-02-23 Wärmebehandlungsverfahren und Wärmebehandlungsvorrichtung
DE102016118253.2 2016-09-27
DE102016118253.2A DE102016118253A1 (de) 2016-09-27 2016-09-27 Verfahren zur Wärmebehandlung eines metallischen Bauteils

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CN109022722A (zh) * 2018-07-23 2018-12-18 中国科学院金属研究所 一种高强度、高韧性犁柱的制造方法
WO2019157075A1 (fr) * 2018-02-06 2019-08-15 Integrated Heat Treating Solutions, Llc Trempe haute pression à uniformité instantanée pour contrôler les propriétés d'une pièce
CN112004948A (zh) * 2018-04-20 2020-11-27 施瓦兹有限责任公司 用于部分冷却部件的温度控制装置
WO2022128880A1 (fr) * 2020-12-15 2022-06-23 Schwartz Gmbh Traitement thermique de composant
US11584972B2 (en) * 2017-09-01 2023-02-21 Schwartz Gmbh Method for heating a metal component to a target temperature and corresponding roller hearth furnace
US12000007B2 (en) 2019-02-06 2024-06-04 Integrated Heat Treating Solutions, Llc High pressure instantaneously uniform quench to control part properties

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DE10208216C1 (de) * 2002-02-26 2003-03-27 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung eines metallischen Bauteils
KR20120110961A (ko) * 2011-03-31 2012-10-10 주식회사 포스코 열간 성형용 블랭크 열처리 장치 및 열간 성형품 제조방법
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
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US11584972B2 (en) * 2017-09-01 2023-02-21 Schwartz Gmbh Method for heating a metal component to a target temperature and corresponding roller hearth furnace
WO2019157075A1 (fr) * 2018-02-06 2019-08-15 Integrated Heat Treating Solutions, Llc Trempe haute pression à uniformité instantanée pour contrôler les propriétés d'une pièce
CN111954722A (zh) * 2018-02-06 2020-11-17 集成热处理解决方案有限责任公司 高压瞬时均匀淬火以控制零件性能
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CN112004948A (zh) * 2018-04-20 2020-11-27 施瓦兹有限责任公司 用于部分冷却部件的温度控制装置
CN112004948B (zh) * 2018-04-20 2023-01-31 施瓦兹有限责任公司 用于部分冷却部件的温度控制装置
CN109022722A (zh) * 2018-07-23 2018-12-18 中国科学院金属研究所 一种高强度、高韧性犁柱的制造方法
CN109022722B (zh) * 2018-07-23 2020-01-03 中国科学院金属研究所 一种高强度、高韧性犁柱的制造方法
US12000007B2 (en) 2019-02-06 2024-06-04 Integrated Heat Treating Solutions, Llc High pressure instantaneously uniform quench to control part properties
WO2022128880A1 (fr) * 2020-12-15 2022-06-23 Schwartz Gmbh Traitement thermique de composant

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CN109072330A (zh) 2018-12-21
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