EP3408416A1 - Procédé de traitement thermique et dispositif de traitement thermique - Google Patents

Procédé de traitement thermique et dispositif de traitement thermique

Info

Publication number
EP3408416A1
EP3408416A1 EP17703345.3A EP17703345A EP3408416A1 EP 3408416 A1 EP3408416 A1 EP 3408416A1 EP 17703345 A EP17703345 A EP 17703345A EP 3408416 A1 EP3408416 A1 EP 3408416A1
Authority
EP
European Patent Office
Prior art keywords
temperature
steel component
regions
furnace
heat treatment
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
EP17703345.3A
Other languages
German (de)
English (en)
Other versions
EP3408416B1 (fr
Inventor
Andreas Reinartz
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
Priority to PL17703345T priority Critical patent/PL3408416T3/pl
Publication of EP3408416A1 publication Critical patent/EP3408416A1/fr
Application granted granted Critical
Publication of EP3408416B1 publication Critical patent/EP3408416B1/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
    • 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
    • C21D1/22—Martempering
    • 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
    • C21D1/18—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
    • C21D1/26—Methods of annealing
    • 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
    • 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
    • C21D1/78—Combined heat-treatments not provided for above
    • 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
    • C21D9/0062—Heat-treating apparatus with a cooling or quenching zone
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • 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
    • F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
    • F27B9/028—Multi-chamber type furnaces
    • 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
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/60—Aqueous agents
    • 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
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/613—Gases; Liquefied or solidified normally gaseous material
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/008—Martensite
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2221/00—Treating localised areas of an article
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • 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

Definitions

  • the invention relates to a method and a device for targeted
  • Ratio of strength to weight include in particular A and B pillars, side impact protection in doors, sills, frame parts,
  • Bumper cross member for floor and roof, front and rear
  • the raw ka rosse with a safety cage usually consists of a hardened steel sheet with about 1, 500 MPa strength. In many cases Al-Si-coated steel sheets are used. For the production of a component from hardened steel sheet the process of the so-called press hardening was developed. This steel sheets are first on
  • Warmed austenitemperatur then placed in a press tool, quickly formed and rapidly through the water-cooled tool to less than
  • the object of the invention is therefore to provide a method and a device for targeted component zone-specific heat treatment of a steel component, wherein regions of different hardness and ductility can be achieved, in which the influence on the cycle time of the entire heat treatment apparatus is minimized.
  • this object is achieved by a method having the features of independent claim 1.
  • Advantageous developments of the method will become apparent from the dependent claims 2 to 5.
  • the object is further by a Device according to claim 8 solved.
  • Advantageous embodiments of the device will become apparent from the dependent claims 6 to 15.
  • a steel component is first heated to below the austenitizing temperature AC3.
  • the steel component is transferred to a treatment station.
  • the second or the second areas as soon as possible within a
  • Treatment time t B cooled.
  • Heat treatment device the treatment station a
  • the treatment station has a device for blowing on the second region (s).
  • This device may, for example, have one or more nozzles.
  • the blowing of the second or the second regions is carried out by blowing with a gaseous fluid, wherein the gaseous fluid water, for example in nebulized form, is attached.
  • the device has one or more nebulizing nozzles.
  • Treatment time t B usually moves in the range of a few seconds.
  • the second or the second regions can also be cooled to well below the martensite start temperature M s .
  • the martensite start temperature M s is, for example, for the frequently used
  • Bodybuilder 22MnB5 at about 410 ° C.
  • the first area or areas are not subjected to any special treatment in the treatment station, ie they are not blown on or on any other special Measures heated or cooled.
  • the first or the first areas cool slowly in the treatment station, for example, via natural convection. It has proven to be advantageous if in the treatment station measures for reducing the temperature losses of the first or the first
  • Such measures can be, for example, the attachment of a heat radiation reflector and / or the isolation of surfaces of the treatment station in the region of the first or the first regions.
  • the steel component is transferred to a second furnace. In this second furnace, the entire steel component is heated. The heating can be done for example by thermal radiation. In this case, the steel component remains during a residence time t 130 in the second furnace, which is dimensioned such that the temperature of the first or the first regions above the AC3 temperature increases. Because the second or the second
  • Press hardening tool are transferred, wherein the first and the first areas are completely austenitized, while the second and the second areas are not austenitized, so that form by quenching in a subsequent press hardening of the first and the first areas martensitic structure with high strength values. Because the second
  • Treatment station which may also have a positioning device to ensure the exact positioning of the different areas, transported in a second oven, which preferably no special devices for owns different treatment of different areas.
  • Embodiment only a furnace temperature 0 4 , ie a substantially homogeneous temperature in the entire furnace chamber, set above the
  • Austenitizing temperature AC3 is. Clearly contoured boundaries of the individual areas can be realized, and the low temperature difference between the two areas minimizes distortion of the components. Small spreads in the temperature level of the component have an advantageous effect on the other
  • a continuous furnace is provided as the first furnace.
  • Continuous furnaces usually have a large capacity and are particularly well suited for mass production, since they can be fed and operated without much effort. But even a batch oven, such as a chamber oven, can be used as the first oven.
  • the second furnace is a continuous furnace.
  • both first and second furnaces are designed as continuous furnaces, the necessary residence times for the first or second regions can be realized as a function of the length of the component via the adjustment of the conveying speed and the design of the respective furnace length. An influencing of the cycle time of the entire production line with heat treatment device and press for a subsequent press hardening is thus avoidable.
  • the second oven is a batch oven
  • the treatment station has a
  • the device for rapid cooling of one or more second regions of the steel component.
  • the device has a nozzle for blowing the second part or regions of the steel component with a gaseous fluid, for example air or an inert gas such as, for example Nitrogen, up.
  • a gaseous fluid for example air or an inert gas such as, for example Nitrogen
  • the device has one or more nebulizing nozzles. By blowing with the gaseous fluid mixed with water, the heat removal from or from the second regions is increased.
  • the second or the second regions are cooled via heat conduction, for example by contacting them with one or more punches, which has or have a significantly lower temperature than the steel component.
  • the stamp can be made of a good heat-conducting material and / or be cooled directly or indirectly. A combination of the types of cooling is conceivable.
  • Heat treatment device can be stamped steel components with one or more first and / or second areas, which may also be complex shaped, economically a corresponding temperature profile, as the different areas contour sharp very quickly to the necessary
  • Heat treatment apparatus possible to set almost any number of second areas.
  • the second or the second areas were never austenitized during the course of the process and, even after being pressed off, have low strength values similar to the original strengths of the untreated steel component.
  • the selected geometry of the sections is freely selectable. Point or line-shaped areas as well as eg large area areas can be displayed. The location of the areas is irrelevant. The second regions may be completely enclosed by first regions or located at the edge of the steel component. Even a full-surface treatment is conceivable.
  • a particular orientation of the steel component to the passage direction is for the purpose of the method according to the invention for specific component zone-specific Heat treatment of a steel component is not required.
  • a limitation of the number of simultaneously treated steel components is at most by the
  • Heat treatment device given.
  • the application of the method to already preformed steel components is also possible. Due to the three-dimensionally shaped surfaces of already preformed steel components, only a higher constructive effort for the representation of the mating surfaces results.
  • Heat treatment systems can be adapted to the method according to the invention.
  • a conventional heat treatment device with only one oven behind this only the treatment station and the second oven must be installed.
  • Fig. 1 is a typical temperature curve in the heat treatment of a steel component having a first and a second region
  • Fig. 2 shows a thermal heat treatment apparatus according to the invention in a plan view as a schematic drawing
  • Fig. 3 shows a further inventive thermal heat treatment apparatus in a plan view as a schematic drawing 4 shows a further inventive thermal heat treatment device in a plan view as a schematic drawing
  • Fig. 5 shows another thermal treatment device according to the invention in a plan view as a schematic drawing
  • FIG. 6 shows a further inventive thermal heat treatment device in a plan view as a schematic drawing.
  • 7 shows a further inventive thermal heat treatment device in a plan view as a schematic drawing
  • FIG. 1 is a typical temperature curve in the heat treatment of a steel component 200 having a first region 210 and a second region 220 according to the inventive method.
  • the steel component 200 is heated in the first furnace 1 10 according to the schematically drawn temperature run ⁇ 2 ⁇ , ⁇ ⁇ during the residence time t 1 10 in the first furnace to a temperature below the AC3 temperature.
  • the steel component 200 is transferred to the treatment station 150 with a transfer time t 12 o.
  • the steel component loses heat.
  • a second region 220 of the steel member 200 is rapidly cooled, wherein the second area 220 loses its heat according to the drawn curve £ 220.150.
  • the blowing ends after the treatment time t B has elapsed, which is only a few seconds depending on the thickness of the steel component 200 and the size of the second region 220.
  • the treatment time t B is equal to the residence time t 150 in the treatment station 150.
  • the second area 220 has now reached the cooling stop temperature ds.
  • the temperature of the first region 210 in the treatment station 150 has also fallen according to the temperature curve $ 210,150 plotted, wherein the first region 210 is not located in the region of the cooling device.
  • Treatment time t B the steel member 200 is transferred during the transfer time t 12 i in the second furnace 130, wherein it continues to lose heat.
  • the second oven 130 changes the temperature of the first portion 210 of the steel member 200 according to the schematically drawn temperature profile ⁇ 2 ⁇ , ⁇ 3 ⁇ during the residence time t 130 , ie the temperature of the first portion 210 of the steel member 200 is heated to a temperature above the AC3 temperature. Also the
  • Temperature of the second region 220 of the steel component 200 increases according to the plotted temperature profile $ 220.130 during the residence time t 130 , without reaching the AC3 temperature.
  • the second furnace 130 has no special devices for different treatment of the different areas 210, 220. Only one furnace temperature ⁇ 4 , ie a substantially homogeneous temperature ⁇ 4 in the entire interior of the second furnace 130, is set which is above the austenitizing temperature AC3 lies. Since the second or the second regions have a significantly lower temperature than the first region (s) at the beginning of the residence time t 130 in the second furnace 130 and both regions are heated equally in the second furnace 130, they also have a different temperature at the end of the residence time ti 30 on.
  • the residence time t 130 of the steel component 200 in the second furnace 130 is so dimensioned that the first region or the first regions at the end of the residence time t 130 have a temperature above the AC3 temperature, while the second
  • Press hardening tool 160 which is installed in a press, not shown, to be transferred.
  • the steel component 200 loses heat again so that the temperature of the first region (s) may also fall below the AC 3 temperature. This or these spaces but substantially completely austenitized, when they leave the second furnace 130 so that they t by a deterrent for a residence time in 160
  • Press hardening train 160 undergoes a transformation into hard martensitic structure.
  • Clearly contoured delimitations of the individual regions 210, 220 can be realized between the two regions 210, 220 and can be realized by the small ones
  • the necessary residence time t 130 of the steel component 200 in the second furnace 130 can be realized depending on the length of the steel component 200 via the adjustment of the conveying speed and the design of the length of the second furnace 130.
  • FIG. 2 shows a heat treatment device 100 according to the invention in a 90 ° arrangement.
  • the heat treatment device 100 has a loading station 101, via which steel components are fed to the first furnace 110. Furthermore, the heat treatment device 100, the treatment station 150 and in
  • Main flow direction D behind arranged the second furnace 130 is a removal station 131, which is equipped with a positioning device (not shown).
  • Main flow direction now bends substantially 90 ° to a
  • Press hardening tool 160 in a press (not shown), in which the steel component 200 is press-hardened.
  • a container 161 is arranged, can be spent in the rejects.
  • the first furnace 110 and the second furnace 120 are at this
  • FIG. 3 shows a heat treatment apparatus 100 according to the invention in a straight arrangement.
  • the heat treatment device 100 has a loading station 101, via which steel components are fed to the first furnace 110. Furthermore, the heat treatment device 100, the treatment station 150 and in
  • a removal station 131 Next in the main flow direction D arranged behind it is a removal station 131, which is equipped with a positioning device (not shown).
  • a press hardening tool 160 in a press (not shown) in which the steel member 200 is press-hardened.
  • a container 161 is arranged, can be spent in the rejects.
  • the first furnace 110 and the second furnace 120 are also preferably designed as continuous furnaces, for example roller hearth furnaces, in this arrangement.
  • Fig. 4 shows a further variant of an inventive
  • the heat treatment device 100 again has a loading station 101, via which steel components are fed to the first furnace 110.
  • the first furnace 1 10 is again preferably designed as a continuous furnace in this embodiment.
  • the heat treatment apparatus 100 has the treatment station 150, which in this embodiment is combined with a removal station 131.
  • Removal device 131 may for example have a gripping device (not shown). The removal station 131 removes, for example by means of the gripping device, the steel components 200 from the first furnace 1 10. Die
  • Heat treatment with the cooling of the second and the second regions 220 is performed and the steel components or the
  • Steel components 200 are inserted into a second furnace 130 arranged essentially at 90 ° to the axis of the first furnace 110.
  • This second furnace 130 is preferably provided in this embodiment as a chamber furnace, for example with a plurality of chambers.
  • the steel components 200 are removed from the second furnace 130 via the removal station 131 and inserted into an opposed press-hardening tool 160 installed in a press (not shown).
  • the removal station 131 may have a positioning device (not shown).
  • a container 161 is arranged behind the removal station 131, can be spent in the rejects.
  • Main flow direction D describes in this embodiment, a deflection of substantially 90 °. In this embodiment, no second
  • Embodiment also take place between removal station 131 and second furnace 130 so that it does not require a stationary treatment station 150.
  • a cooling device for example a blowing nozzle
  • the removal device 131 ensures the transfer of the steel component 200 from the first furnace 110 into the second furnace 130 and into the press-hardening tool 160 or into the container 161.
  • FIG. 6 shows a heat treatment device according to FIG. 6:
  • the second furnace 130 is offset in a second plane above the first furnace 110.
  • the cooling of the second regions 220 of the steel component 200 can also take place between the removal station 131 and the second furnace 130, so that no stationary treatment station 150 is required.
  • FIG. 7 shows a final embodiment of the invention
  • Heat treatment device shown schematically. Compared to the embodiment shown in FIG. 6, the positions of the press-hardening tool 160 and the container 161 are reversed.
  • the embodiments shown here are only examples of the present invention

Landscapes

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

Abstract

La présente invention concerne un procédé et un dispositif de traitement thermique ciblé et individuel par zones d'élément. Selon ce procédé, une structure prioritairement austénitique peut être réglée dans une ou plusieurs premières zones de l'élément en acier, à partir de cette structure, une structure majoritairement martensitique peut être obtenue par trempe, et une structure majoritairement ferritique-perlitique se trouve dans une ou plusieurs deuxièmes zones de l'élément en acier ; l'élément en acier est tout d'abord chauffé dans un premier four à une température inférieure à la température AC3 puis l'élément en acier étant transféré à une station de traitement tout en pouvant être refroidi en cours de transfert et, dans la station de traitement, la ou les deuxièmes zones de l'élément en acier peuvent être refroidies pendant un temps de séjour t150 à une température d'arrêt de refroidissement ϑS ; l'élément en acier est ensuite transféré dans un deuxième four dont la chaleur est cédée à l'élément en acier, la température de la ou des deuxièmes zones remontant à une température en-deçà de la température AC3 pendant le temps de séjour t130, tandis que l'au moins une première zone est chauffée, sa température étant portée pendant le même temps de séjour t130 à une température supérieure à la température AC3.
EP17703345.3A 2016-01-25 2017-01-25 Procédé de traitement thermique et dispositif de traitement thermique Active EP3408416B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL17703345T PL3408416T3 (pl) 2016-01-25 2017-01-25 Sposób obróbki cieplnej i urządzenie do obróbki cieplnej

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016201025.5A DE102016201025A1 (de) 2016-01-25 2016-01-25 Wärmebehandlungsverfahren und Wärmebehandlungsvorrichtung
PCT/EP2017/051510 WO2017129602A1 (fr) 2016-01-25 2017-01-25 Procédé de traitement thermique et dispositif de traitement thermique

Publications (2)

Publication Number Publication Date
EP3408416A1 true EP3408416A1 (fr) 2018-12-05
EP3408416B1 EP3408416B1 (fr) 2021-11-10

Family

ID=57965906

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17703345.3A Active EP3408416B1 (fr) 2016-01-25 2017-01-25 Procédé de traitement thermique et dispositif de traitement thermique

Country Status (13)

Country Link
US (1) US20190032164A1 (fr)
EP (1) EP3408416B1 (fr)
JP (2) JP7168450B2 (fr)
CN (2) CN206204351U (fr)
AT (1) AT15624U1 (fr)
BR (1) BR112018014947B1 (fr)
DE (2) DE102016201025A1 (fr)
ES (1) ES2904571T3 (fr)
HU (1) HUE057631T2 (fr)
MX (1) MX2018008998A (fr)
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BR112018014947B1 (pt) 2022-11-22
CN108884508A (zh) 2018-11-23
EP3408416B1 (fr) 2021-11-10
ES2904571T3 (es) 2022-04-05
DE202016104194U1 (de) 2017-04-27
PL3408416T3 (pl) 2022-03-28
JP2021179012A (ja) 2021-11-18
HUE057631T2 (hu) 2022-05-28
JP7261267B2 (ja) 2023-04-19
JP2019506532A (ja) 2019-03-07
CN108884508B (zh) 2020-08-14
PT3408416T (pt) 2022-01-26
US20190032164A1 (en) 2019-01-31
KR20180119580A (ko) 2018-11-02
BR112018014947A2 (pt) 2018-12-26
CN206204351U (zh) 2017-05-31
AT15624U1 (de) 2018-03-15
DE102016201025A1 (de) 2017-07-27
WO2017129602A1 (fr) 2017-08-03
JP7168450B2 (ja) 2022-11-09

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