EP3408419A1 - Procédé et dispositif de traitement thermique d'une pièce métallique - Google Patents

Procédé et dispositif de traitement thermique d'une pièce métallique

Info

Publication number
EP3408419A1
EP3408419A1 EP17703053.3A EP17703053A EP3408419A1 EP 3408419 A1 EP3408419 A1 EP 3408419A1 EP 17703053 A EP17703053 A EP 17703053A EP 3408419 A1 EP3408419 A1 EP 3408419A1
Authority
EP
European Patent Office
Prior art keywords
component
furnace
temperature
heating
subregion
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.)
Pending
Application number
EP17703053.3A
Other languages
German (de)
English (en)
Inventor
Andreas Reinartz
Jörg Winkel
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
Priority claimed from DE102016201024.7A external-priority patent/DE102016201024A1/de
Priority claimed from DE102016201025.5A external-priority patent/DE102016201025A1/de
Priority claimed from DE102016201936.8A external-priority patent/DE102016201936A1/de
Priority claimed from DE102016202766.2A external-priority patent/DE102016202766A1/de
Priority claimed from DE102016118252.4A external-priority patent/DE102016118252A1/de
Application filed by Schwartz GmbH filed Critical Schwartz GmbH
Publication of EP3408419A1 publication Critical patent/EP3408419A1/fr
Pending legal-status Critical Current

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
    • C21D9/0062—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
    • C21D1/673—Quenching devices for die quenching
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0068—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
    • 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
    • C21D2221/00—Treating localised areas of an article

Definitions

  • the invention relates to a method and a device for heat treatment of a metallic component and to a use of a furnace for heating a metallic component.
  • the invention finds particular application in the partial hardening of optionally precoated components made of a high-strength manganese-boron steel.
  • A- and B-pillars side impact protection in doors, sills, 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 a deformation energy during a side impact and on the other during assembly of the B-pillar to allow easy connectivity with other body components.
  • the hardened component To form such a partially hardened body component, it is necessary for the hardened component to have different material structures or strength properties in the subregions.
  • the steel sheet to be hardened can already be provided with different, interconnected sheet metal sections or partially cooled differently in the press.
  • the steel sheet is hardened before cooling and forming in the press partially different heat treatment processes.
  • only those portions of the steel sheet to be hardened can be heated, in which a structural transformation towards harder structures, such as martensite to take place.
  • a process procedure regularly has the disadvantage that the diffusion of a coating, for example an aluminum-silicon coating, which is usually to be applied to the surface of the steel sheet for protection against scaling can not be integrated efficiently into the heat treatment process.
  • a coating for example an aluminum-silicon coating
  • a method and a device for heat treatment of a metallic component and a use of a furnace for heating a metallic component are to be specified, which allow an industrial scale, in particular as efficiently as possible partially different heat treatment of the component.
  • the method, the device and the use to help reduce the influence of the process section of the heat treatment process, which is upstream of the press on the cycle time of the entire heat treatment process.
  • An inventive method for (partially different) heat treatment of a metallic component has at least the following steps:
  • the indicated sequence of process steps a), b), c), d) and e) results in a regular procedure of the method. Individual or several of the method steps can be carried out simultaneously, successively and / or at least partially in parallel. The method is preferably carried out with a device presented here.
  • the proposed method is used in particular for the specific component zone-specific heat 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 made of a (high-strength) manganese-boron steel.
  • the proposed method allows in a particularly advantageous manner that a partially different heat treatment of a component can be performed reliably even on an industrial scale.
  • the cooling in the tempering station is followed by a renewed heating process or a renewed supply of heat energy, the influence of the process section of the heat treatment process, which is upstream of the press, can be reduced to the cycle time of the entire heat treatment process.
  • the component preferably remains in the tempering station for less than fifteen seconds, in particular less than ten seconds or even less than five seconds. Subsequently, the component, in common with further, previously or subsequently treated in the temperature control components in a chamber furnace or transported through a continuous furnace.
  • This allows in a particularly advantageous manner that the cycle time of the heat treatment process, which is upstream of the press, can be adapted to the press cycle.
  • the invention particularly turns away from those process guides in which a cooled or intercooled region of a component is kept isothermally for a certain period of time for the conversion of previously formed austenite into microstructures such as bainite, ferrite and / or pearlite. Rather, it has surprisingly been found in the context of the invention that a renewed heating compared to an isothermal holding can lead to improved, in particular higher tensile strengths in the more ductile regions of the cured component.
  • 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 AlumMum / silicon (Al / Si) coating.
  • the (entire) component is heated in a first furnace.
  • the component is heated homogeneously or uniformly in the first furnace.
  • the component in the first furnace (exclusively) by means of radiant heat, for example of at least one electrically operated (the component not physically or electrically contacting) heating element, such as for example, a heating loop and / or a heating wire, and / or heated by at least one (gas-heated) jet pipe.
  • step b) 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 guided in contact with the ambient air or within a protective atmosphere.
  • step c) at least a first portion of the component in the tempering (active) is cooled.
  • a temperature difference between the at least one first (in the finished treated component ductile) portion and at least one second (in the finished treated component compared to harder harder) portion of the component is set.
  • 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 set. For example, it is possible to set three or more subregions in the component with mutually different temperatures.
  • the cooling in step c) is convective, more preferably by means of at least one nozzle discharging a fluid.
  • the nozzle can be arranged in the temperature control station and aligned towards the first partial area.
  • the fluid may be, for example, air, nitrogen, water or a Mixture of this act.
  • the cooling takes place by means of a nozzle array with a plurality of nozzles, each discharging a fluid, wherein particularly preferably the shape of the nozzle field and / or the arrangement of the plurality of nozzles is adapted to the (to be achieved) geometry of the at least one first portion of the component.
  • the cooling takes place 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 volume flow.
  • the nozzles are controlled time-dependent.
  • the nozzles are controlled in such a way (individually or in groups) that specifically one or more temperature differences between partial regions of the component, for example between the at least one first partial region and the at least one second partial region, are set.
  • 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 compensation can for example take place such that a region of the component lying further on the edge, in particular a region of the at least one first partial region lying further on the edge of the component, is cooled less than in comparison thereto further away from the edge lying portion of the component, in particular as a more distant from the component edge region of the at least a first portion of the component, so as to optionally take place after leaving the tempering, in particular in heat exchange with the environment taking place faster cooling of the component in the edge regions consider or even (essentially) compensate. More preferably, at the same time or at least partially parallel to the cooling of the at least one first partial region of the component, thermal energy is introduced into the at least one second partial region of the component in the tempering station.
  • 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 partial region of the component can 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 partial region and / or a cooling speed of the at least one second partial region are at least reduced during the whereabouts of the component in the temperature control station becomes.
  • This process procedure is particularly advantageous if the component was 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 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 K. 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 component is moved by the temperature control in a second oven.
  • a transport device for example, at least comprising a roller table and / or an (industrial) robot may 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.
  • step e) at least the at least one first subregion of the component in the second furnace is heated by at least 200 K.
  • a renewed heating process takes place in the second furnace, wherein at least the previously (actively) cooled at least one first partial region is heated by at least 200 K.
  • 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) by means of radiant heat, heated.
  • 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 may have a furnace interior, in particular (exclusively) heated by radiant heat, in which preferably a virtually uniform internal temperature prevails.
  • 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 at least 120 K, particularly preferably at least 150 K or even at least 200 K is increased.
  • 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 rate of the at least one second subregion during the fostering of the component in the second furnace at least reduced.
  • This process procedure is particularly advantageous if the component was 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 (distinctively) heats up, in particular by at least 50 K, particularly preferably by at least 70 K or even by at least 100K; and / or heated to a temperature above the AC1 temperature or even above the AC3 temperature.
  • This process is particularly advantageous if 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 in step f) preferably takes place by means of a transport device, for example at least comprising a roller table and / or an (industrial) robot.
  • the component travels a distance of at least 0.5 m from the second furnace to the press hardening tool.
  • the component can be guided in contact with the ambient air or within a protective atmosphere.
  • the component is spent directly after removal from the second oven directly into the press-hardening tool.
  • the component is heated in step a) to a temperature below the AC3 temperature or even below the AC1 temperature.
  • the AC1 temperature is the temperature at which the microstructure transformation from ferrite to austenite begins when a metallic component, in particular a steel component, is heated.
  • the component is heated in step a) to a temperature above the AC3 temperature.
  • the AC3 temperature is the temperature at which the microstructure transformation from ferrite to austenite upon heating of a metallic component, in particular a steel component, ends or is (completely) completed.
  • the at least one first subregion in step c) be convected to a temperature below that AC1 temperature is cooled.
  • a method for heat treatment of a metallic component is proposed with at least the following steps:
  • the at least one first portion of the component in step c) or in the second furnace by a maximum of 350 K, particularly preferred heated to a maximum of 300 K or even a maximum of 250 K.
  • the heating in step c) or in the second furnace preferably takes place in such a way that only the at least one first subregion of the component is heated by at least 100 K, preferably by at least 150 K or even by at least 200 K.
  • the at least one second subregion of the component in step c) or in the second furnace is heated by less than 200 K, preferably by less than 150 K or even by less than 100 K.
  • the component is simultaneously formed and cooled in a step d).
  • the component is press-cured in step d).
  • a device for heat treatment of a metallic component which comprises at least:
  • a tempering station arranged downstream of the first furnace, in which at least one nozzle is provided and arranged for discharging a fluid for cooling at least a first portion of the component, such that a temperature difference between the at least one first portion and at least one second portion of Component is adjustable, one of the tempering station downstream, in particular by means of radiant heat and / or convection heatable second oven, which is provided and adapted to heat at least the at least a first portion of the component by at least 100 K, preferably by at least 150 K or even by at least 200 K.
  • the device is used for practicing a method proposed 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 particularly preferably a continuous furnace, in particular a roller hearth furnace, or a chamber furnace, in particular a multilayer furnace with at least two chambers arranged one above the other.
  • the second furnace preferably has a furnace interior, in particular (exclusively) which can be heated by means of radiant heat, in which preferably a virtually uniform internal temperature can be set.
  • a furnace interior in particular (exclusively) which can be heated by means of radiant heat, in which preferably a virtually uniform internal temperature can be set.
  • Radiation heat sources are preferably arranged in the first furnace and / or in the second furnace (exclusively).
  • at least one electrically operated (non-contacting component) 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 jet tube gas burners or jet tubes are arranged in the furnace interior of the first furnace and / or the furnace interior of the second furnace, in each of which at least one gas burner burns.
  • the inner region of the steel tubes, into which the gas burners burn is atmospherically separated from the furnace interior, so that no combustion gases or exhaust gases can enter the furnace interior 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 is aligned such that it can discharge the fluid toward the first subregion of the component.
  • a nozzle array is arranged with a plurality of nozzles in the tempering, wherein the nozzles are each provided and arranged for discharging a fluid.
  • Particularly preferred is a shape of the nozzle array and / or an arrangement of the plurality of nozzles adapted to the (to be achieved) geometry of the at least one first portion of the component.
  • At least one heating device is preferably arranged in the tempering station.
  • the heating device is provided and arranged to enter heat energy in the at least one second portion of the component.
  • the heating device is arranged and / or aligned in the tempering station such that the introduction of heat 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 (exclusively) at least one radiant heat source.
  • the at least one radiant heat source is particularly preferably formed with at least one electrically operated heating element (which does not contact the component), for example 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 radiant heat source.
  • 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 in parallel and to quench it (at least in part).
  • the furnace is a second furnace, which is arranged downstream of a first furnace and a tempering station. More preferably, the subregions to be heated by means of the furnace are previously (active), in particular convective, cooled subregions of the component.
  • FIG. 1 shows a diagram of a device according to the invention
  • FIG. 2 shows a detailed view of a temperature control station that can be used in a device according to the invention
  • 3 shows a temperature-time curve which can be achieved by means of a device according to the invention and / or a method according to the invention
  • FIG. 4 shows another temperature-time curve which can be achieved by means of a device according to the invention and / or a method according to the invention.
  • the device 8 here represents a hot forming line for press hardening.
  • the tempering station 3 is downstream of the first furnace 6 (directly) so that a component 1 to be treated by means of the device 8 can be brought directly into the tempering station 3 after leaving the first furnace 6.
  • the second furnace 6 of the tempering station 3 and the press hardening tool 7 are arranged downstream of the second furnace 6 (directly).
  • FIG. 2 schematically shows a detailed view of a tempering station 3 which can be used in a device 8 according to the invention, as shown for example in FIG. 1.
  • a nozzle 9 is arranged, which is provided and arranged for discharging a fluid 10 for cooling a first portion 4 of a component 1.
  • a heating device 11 is arranged in the temperature control station 3, which is provided and set up for the introduction of heat energy in a second portion 5 of the component 1.
  • the heating device 11 is designed as an example electrically operated heating wire.
  • FIG. 3 shows schematically a temperature-time curve which can be achieved by means of a device 8 according to the invention and / or a method according to the invention.
  • the temperature T of the metallic component or the temperatures T of the at least one first partial area and the at least one second partial area of the component are plotted over the time t.
  • the metallic component 1 is first heated until the time U uniform to a temperature below the AC1 temperature. This heating takes place here by way of example in a first furnace 2. Between times ti and t 2 , the metallic component is transferred from the first furnace to a tempering station. Here, the component temperature, for example, by heat loss to the environment easily decrease. Between the times t 2 and t 3 , 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 . In parallel, at least a second portion of the component in the tempering (light) is heated. This is illustrated in FIG.
  • a temperature difference 12 is set between the at least one first partial region and at least one second partial region of the component.
  • the component of the heating station in a direction different from the first furnace second furnace is transferred.
  • the set in the tempering partially different temperatures, for example, by heat loss to the environment can easily decrease.
  • the component in the second furnace is heated 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 oven is carried out 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.
  • FIG. 4 shows schematically a further temperature-time profile which can be achieved by means of a device according to the invention and / or a method according to the invention.
  • 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. Between times t 1 and t 2 , the metallic component is transferred from the first furnace to a tempering station. In this case, the component temperature can easily decrease.
  • At times t2 and t3 at least a first portion of the component in the temperature control (active) is cooled. This is illustrated in FIG. 4 on the basis of the lower temperature-time profile between the times t 2 and t 3 .
  • the temperature of at least a second portion of the component in the tempering easily decrease. This is illustrated in FIG. 4 on the basis of the upper temperature-time profile between times t 2 and t 3 .
  • This (passive) temperature decrease in the at least one second partial region of the component has a significantly lower cooling rate than the parallel (active) cooling of the at least one first partial region of the component. 4 shows that a temperature difference 12 between the at least one first partial area and at least one second partial area of the component is set in the temperature control station.
  • the component is transferred from the tempering station into a second oven different from the first oven.
  • the set in the temperature control partially different temperatures can easily decrease.
  • the component in the second furnace is heated in such a way 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 furnace such that at the same time a cooling rate of the at least one second portion of the component, in comparison to a Cooling rate is reduced during heat dissipation to the environment.
  • 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.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Tunnel Furnaces (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Furnace Details (AREA)

Abstract

L'invention concerne un procédé et un dispositif de traitement thermique d'une pièce métallique, ainsi que l'utilisation d'un four servant à chauffer une pièce métallique. L'invention est en particulier destinée à être utilisée pour la trempe partielle de pièces en acier haute résistance au manganèse-bore éventuellement pré-revêtues. Un procédé de traitement thermique d'une pièce métallique (1) selon l'invention comprend au moins les étapes suivantes : a) le chauffage de la pièce (1) dans un premier four (2) ; b) le déplacement de la pièce (1) dans un poste de thermorégulation (3) ; c) le refroidissement d'au moins une première partie (4) de la pièce (1) dans le poste de thermorégulation (3), une différence de température entre la ou les premières parties (4) et au moins une deuxième partie (5) de la pièce (1) étant réglée ; d) le déplacement de la pièce (1) du poste de thermorégulation (3) dans un deuxième four (6) ; e) l'augmentation de la température d'au moins la ou les premières parties (4) de la pièce (1) dans le deuxième four de l'ordre d'au moins 200 K.
EP17703053.3A 2016-01-25 2017-01-25 Procédé et dispositif de traitement thermique d'une pièce métallique Pending EP3408419A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE102016201024.7A DE102016201024A1 (de) 2016-01-25 2016-01-25 Wärmebehandlungsverfahren und Wärmebehandlungsvorrichtung
DE102016201025.5A DE102016201025A1 (de) 2016-01-25 2016-01-25 Wärmebehandlungsverfahren und Wärmebehandlungsvorrichtung
DE102016201936.8A DE102016201936A1 (de) 2016-02-09 2016-02-09 Wärmebehandlungsverfahren und Wärmebehandlungsvorrichtung
DE102016202766.2A DE102016202766A1 (de) 2016-02-23 2016-02-23 Wärmebehandlungsverfahren und Wärmebehandlungsvorrichtung
DE102016118252.4A DE102016118252A1 (de) 2016-09-27 2016-09-27 Verfahren und Vorrichtung zur Wärmebehandlung eines metallischen Bauteils
PCT/EP2017/051507 WO2017129599A1 (fr) 2016-01-25 2017-01-25 Procédé et dispositif de traitement thermique d'une pièce métallique

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US (1) US11078553B2 (fr)
EP (1) EP3408419A1 (fr)
JP (1) JP7112329B2 (fr)
KR (1) KR102576917B1 (fr)
CN (1) CN109312416A (fr)
BR (1) BR112018014951B1 (fr)
MX (1) MX2018008996A (fr)
WO (1) WO2017129599A1 (fr)

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EP3868901B1 (fr) 2020-02-21 2022-09-21 C.R.F. Società Consortile per Azioni Procéde de formage d'une bande métallique en un composant complexe présentant des régions ayant des propriétés méchaniques différentes, en particulier un composant automobile, et four de réchauffement d'une bande avant déformation.
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CN109312416A (zh) 2019-02-05
WO2017129599A1 (fr) 2017-08-03
JP2019508582A (ja) 2019-03-28
BR112018014951A2 (pt) 2018-12-26
US20190032162A1 (en) 2019-01-31
MX2018008996A (es) 2019-01-10
BR112018014951B1 (pt) 2022-10-04
KR102576917B1 (ko) 2023-09-08
KR20180119579A (ko) 2018-11-02
US11078553B2 (en) 2021-08-03
JP7112329B2 (ja) 2022-08-03

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