EP2655672A2 - Procédé pour produire des éléments de construction durcis pourvus de zones de différentes duretés et/ou ductilités - Google Patents

Procédé pour produire des éléments de construction durcis pourvus de zones de différentes duretés et/ou ductilités

Info

Publication number
EP2655672A2
EP2655672A2 EP11807691.8A EP11807691A EP2655672A2 EP 2655672 A2 EP2655672 A2 EP 2655672A2 EP 11807691 A EP11807691 A EP 11807691A EP 2655672 A2 EP2655672 A2 EP 2655672A2
Authority
EP
European Patent Office
Prior art keywords
temperature
cooling
board
heated
blank
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
EP11807691.8A
Other languages
German (de)
English (en)
Other versions
EP2655672B1 (fr
Inventor
Andreas Sommer
Harald Schwinghammer
Thomas Kurz
Siegfried Kolnberger
Martin Rosner
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.)
Voestalpine Stahl GmbH
Original Assignee
Voestalpine Stahl 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 DE102010056265.3A external-priority patent/DE102010056265C5/de
Priority claimed from DE102010056264.5A external-priority patent/DE102010056264C5/de
Priority claimed from DE102011053939.5A external-priority patent/DE102011053939B4/de
Priority claimed from DE102011053941.7A external-priority patent/DE102011053941B4/de
Application filed by Voestalpine Stahl GmbH filed Critical Voestalpine Stahl GmbH
Publication of EP2655672A2 publication Critical patent/EP2655672A2/fr
Application granted granted Critical
Publication of EP2655672B1 publication Critical patent/EP2655672B1/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
    • C21D1/62—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
    • 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
    • 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
    • C21D9/48—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals deep-drawing sheets
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/06—Zinc or cadmium or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/26—After-treatment
    • C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/26—After-treatment
    • C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
    • C23C2/29—Cooling or quenching

Definitions

  • the invention relates to a method for producing hardened components with regions of different hardness and / or ductility with the features of claim 1.
  • press-hardened components made of sheet steel are used.
  • These press-hardened components made of sheet steel are high-strength components that are used in particular as safety components of the bodywork sector.
  • the use of these high-strength steel components makes it possible to reduce the material thickness compared to a normal-strength steel and thus to achieve low body weights.
  • a sheet steel plate is heated above the so-called austenitizing temperature and, if appropriate, kept at this temperature until a desired degree of austenitization is achieved. Subsequently, this heated board is transferred to a mold and in this mold in a one-step forming step for formed component and this cooled by the cooled mold simultaneously with a speed that is above the critical hardness speed. Thus, the hardened component is produced.
  • the component is first, if necessary, in a multi-stage forming process, the component formed almost completely finished. This formed component is then also heated to a temperature above the Austenitmaschinestempe- temperature and optionally held for a desired time required at this temperature.
  • this heated component is transferred to a mold and inserted, which already has the dimensions of the component or the final dimensions of the component, where appropriate, taking into account the thermal expansion of the preformed component.
  • the direct method is somewhat simpler to implement, but allows only shapes that are actually to be realized with a single forming step, i. relatively simple profile shapes.
  • the indirect process is a bit more complex, but it is also able to realize more complex shapes.
  • Zinc has the advantage here that zinc not only provides a barrier protection layer such as aluminum, but cathodic corrosion protection.
  • zinc-coated press-hardened components fit better into the overall corrosion protection concept of vehicle bodies, since they are fully galvanized in today's common construction. In this respect, contact corrosion can be reduced or eliminated.
  • Zinc-coated steels are currently - with the exception of one component in the Asian region - in the direct process, i. hot forming, not used. Instead, steels with an aluminum-silicon coating are used here.
  • the zinc-iron phase diagram shows that above 782 ° C a large area arises in which liquid zinc-iron phases occur as long as the iron content is low, in particular less than 60%. However, this is also the temperature range in which the austenitized steel is thermoformed. It should also be noted, however, that if the deformation occurs above 782 ° C, there is a great risk of stress corrosion by liquid zinc, which is believed to penetrate the grain boundaries of the base steel, resulting in macrocracks in the base steel. In addition, with iron levels less than 30% in the coating, the maximum temperature for forming a safe product with no macrocracks is less than 782 ° C. This is the reason why hereby no direct forming process is operated, but that indirect forming process. This is intended to circumvent the problem described.
  • a method for hot forming a coated steel product wherein the steel material has a zinc or zinc alloy coating formed on the surface of the steel material and the steel base material with the coating at a temperature of 700 ° C to 1000 Is heated and hot-formed, the coating having an oxide layer consisting mainly of zinc oxide before the steel base material is heated with the zinc or zinc alloy layer, to prevent evaporation of the zinc upon heating.
  • a special procedure is provided.
  • a method for hot forming a steel in which a component made of a given boron-manganese steel is heated to a temperature at the Ac 3 point or higher, kept at this temperature and then the heated one Steel sheet is formed into the finished component, wherein the molded component is quenched by cooling from the molding temperature during molding or after molding in such a manner that the cooling rate to MS point at least the critical cooling rate and that the average cooling rate of the molded component from the MS Point at 200 ° C is in the range of 25 ° C / s to 150 ° C / s.
  • the applicant's EP 1 651 789 B1 discloses a method for producing hardened components from sheet steel, in which case shaped parts are cold-formed from a steel sheet provided with a cathodic protection against corrosion and followed by a heat treatment for the purpose of austenitizing, before, during or after the cold forming of the molding, a final trimming of the molding and required punching or the creation of a hole pattern are made and the cold forming and the trimming and the punching and arrangement of the hole pattern on the component 0.5% to 2% smaller than the dimensions that the should then have hardened component, wherein the cold-formed for heat treatment molding is then at least partially heated under the access of air oxygen to a temperature which allows Austenitmaschine the steel material and the heated component is then transferred to a tool and in the
  • the tool is a so-called mold hardening carried out in which by applying and pressing (holding) of the component by the mold hardening tools, the component is cooled and thereby hardened and the cathodic protection zs coating consists of a mixture of
  • an oxide skin is formed on the surface of the anti-corrosion coating from the oxygen-affine elements during the heating, which protects the cathodic anti-corrosion layer, in particular the zinc layer.
  • the process by the scale reduction of the component with respect to its final geometry, the thermal expansion of the component is taken into account, so that neither a calibration nor a transformation are necessary in the form of hardening.
  • a method for producing partially hardened steel components wherein a board made of a hardenable steel sheet is subjected to a temperature increase, which is sufficient for quenching and the board after reaching a desired temperature and optionally a desired hold time in a forming tool is converted by the board is formed into a component and simultaneously quenched, or cold formed the board and the component obtained by the cold forming is then subjected to a temperature increase, wherein the temperature increase is performed so that a temperature of the component is achieved, which is necessary for a quench hardening and the component is then transferred to a tool in which the heated component is cooled and thereby quenched hardened, wherein during the heating of the board or the component to Z raise the temperature increase to a temperature necessary for curing in the areas which are to have a lower hardness and / or a higher ductility, absorption masses or are spaced with a small gap, the absorption mass with respect to their extent and thickness, their thermal conductivity and their heat
  • DE 10 2005 003 551 A1 discloses a method for hot working and hardening of a steel sheet, in which a steel sheet is heated to a temperature above the Ac 3 point. after cooling to a temperature in the range of 400 ° C to 600 ° C undergoes and is transformed only after reaching this temperature range.
  • this document does not deal with the crack problem or a coating, nor is a martensite formation described.
  • the aim of the invention is the formation of intermediate structures, so-called bainite.
  • the object of the invention is to provide a method for producing especially provided with a corrosion protective layer sheet steel components with areas of different hardness or ductility, with local stresses in the component and distortion as well as cracks, as otherwise caused by "liquid metal assisted cracking" can be avoided.
  • the method according to the invention can be carried out successfully in both the so-called indirect process and in the direct process with regard to the mechanical properties.
  • the boards are shaped before heating to the finished component, possibly reduced in all three spatial axes by an expected heat expansion.
  • the thus obtained component is heated in an oven, wherein, in order to achieve regions of different temperature, absorption masses or insulating components or the like are provided in the regions of the component which are not or less to be hardened.
  • a temperature is reached in these areas, which is below AC 3 o- and possibly even Aci and thus a quench hardening by conversion of austenite into martensite a restricts or prevents.
  • a complete austenitization is sought, which leads to a martensitic hardness during quenching.
  • the board is heated without being deformed and the areas of the board which are not or less hardened are also brought into contact with absorption masses, which reduce heating of the sheet due to their thermal conductivity and heat capacity or are likewise arranged according to insulation components , Subsequently, this board is reshaped.
  • the board is evened out in terms of temperature in both cases before curing (indirect process) or curing and forming (direct process).
  • so-called conversion-delayed steels are used. This means that the transformation into martensite takes place later so that the components, after equalizing the temperature and setting in the hardening tool or the hardening / shaping tool, despite having uniform temperature, have areas which are characterized by the subsequent rapid cooling with a cooling rate above the critical one Hardness hardened while the other areas, which were not brought to the Austenitmaschinestemperatur, are softer. It is advantageous that the equalization of the temperature also leads to a uniform formability, so that local stresses due to different temperatures or different thermo-mechanical properties are avoided and, in particular, thinning in the boundary regions between cold and hot regions is avoided.
  • Another advantage obtained by the direct method is that the so-called "liquid metal embrittlement" is avoided.
  • the composition of the steel alloy is adjusted within the usual composition of a manganese boron steel (22MnB5) such that a quench hardening by a delayed transformation of austenite into martensite and thus the presence of austenite even at the lower temperature below 780 ° C or lower, so that at the moment in the mechanical stress is introduced to the steel, which would lead in connection with a molten zinc and austenite to the "liquid metal embrittlement", just no or very few liquid Zinc phases are present.
  • a set according to the alloying elements boron manganese steel sufficient Quench hardening without provoking excessive or damaging cracking.
  • the active intermediate cooling before forming is necessary for a crack-free forming.
  • the intermediate cooling can take place, for example, in one or more stages.
  • additional time periods can be planned for the sheets, which have different heated areas, for example, to bring about no hardening in colder areas, to equalize the temperature, in particular, wait until the over Austenitizing temperature heated areas have a temperature that has adapted to the temperature of the less heated areas.
  • This adaptation of the temperature profile can be effected in particular also by an active cooling of the hotter areas, in particular by blowing on these areas or the like, possibly covering, shielding or insulating the cold or colder areas during the cooling of the heated areas.
  • a control of air nozzles for blowing in the special case of sheets of different temperature can be done via pyrometers, which are for example outside the press and the furnace in a separate plant as well as the corresponding nozzles.
  • the cooling options are not limited to air nozzles, it can also be used on cooled tables on which the boards are positioned accordingly and which include cooled and non-cooled areas, so that the cooled areas of the board on cooled areas of the Table to come to rest and be brought into heat-conducting contact, for example by pressing or suction.
  • the use of a cooling press is conceivable in which the press geometry by the planar boards is very simple and inexpensive, the areas of the tool in which the board should be cooled according to liquid cooled, while the areas that are not to be cooled, for example compared the cold metal of the press by means of insulating layers, which are inserted in the tools, be shielded or these areas are easily heated, for example by induction or kept at temperature.
  • a uniform forming temperature is achieved before forming, which ensures improved forming behavior in the forming press.
  • Figure 1 the time-temperature curve during the cooling between
  • Figure 2 greatly enlarged images showing the samples with the different temperatures
  • FIG. 3 cross-section of the samples according to FIG.
  • FIG. 5 a ZTU diagram
  • FIG. 6 shows the schematic sequence of the method according to the invention in the direct process
  • FIG. 7 shows the schematic sequence of the method according to the invention in the indirect process
  • Figure 8 the schematic sequence with combined centering and cooling station for one-sided intermediate cooling.
  • a conventional boron manganese steel for use as a press-hardening steel material is adjusted with respect to the transformation of the austenite into other phases so that the transformation shifts to deeper areas and martensite can be formed.
  • alloying elements boron, manganese, carbon and optionally chromium and molybdenum are used as conversion inhibitors in such steels.
  • Steels of the general alloy composition are also suitable for the invention (all figures in% by mass):
  • Titanium (Ti) 0, 03-0, 04
  • a holding phase can be provided in the temperature range of the peritectic, so that the solidification of the zinc coating is promoted and advanced before it is subsequently formed.
  • FIG. 1 shows a favorable temperature profile for an austenitized steel sheet, whereby it can be seen that after heating to a temperature above the austenitizing temperature and the corresponding introduction into a cooling device, a certain cooling already takes place. This is followed by a rapid intermediate cooling step.
  • the intermediate cooling step is advantageously carried out at cooling rates of at least 15 K / s, preferably at least 30 K / s, more preferably at least 50 K / s.
  • the board is transferred to the press and carried out the forming and curing.
  • Figure 4 can be seen in the iron-carbon diagram such as a board with different hot areas treated accordingly. It can be seen for the hot, to be cured areas a high starting temperature between 800 ° C and 900 ° C while the soft areas have been heated to a temperature below 700 ° C and in particular are then not available for curing. A temperature adjustment can be seen at a temperature of about 550 ° C or slightly below, and after setting the hotter areas, this temperature of the softer areas, the rapid cooling at 20 K / s.
  • the temperature adjustment is carried out such that there are still differences in the temperatures of the (previously) hot regions and the (previously) colder regions which do not exceed 75 ° C., in particular 50 ° C. ( in both directions) .
  • FIG. 3 shows the difference in the formation of cracks. Without intermediate cooling cracking occurs, which extends into the steel material, with the intercooling results only superficial cracks in the coating, which are not critical.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Heat Treatment Of Articles (AREA)
  • Coating With Molten Metal (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

L'invention concerne un procédé pour produire un élément de construction en acier durci pourvu de zones de différentes ductilités ou duretés. Un larget est découpé à la matrice et, soit le larget découpé à la matrice est chauffé dans des zones partielles à une température ≥Ac3 et éventuellement maintenu à cette température pendant un temps prédéfini pour la formation d'austénite puis le larget chauffé dans des zones partielles est transféré dans un outil de moulage, est mis en forme dans l'outil de moulage, est refroidi dans l'outil de moulage à une vitesse supérieure à la vitesse de durcissement critique et est ainsi durci, soit le larget est achevé par formage à froid. Le larget mis en forme est chauffé dans des zones partielles à une température >Ac3 et est éventuellement maintenu à cette température pendant un temps prédéfini pour la formation d'austénite, puis le larget partiellement chauffé et mis en forme est transféré dans un outil de durcissement et est durci dans l'outil de durcissement à une vitesse supérieure à la vitesse de durcissement critique, le matériau acier étant réglé avec une transformation retardée de façon qu'à une température de formage comprise entre 450 °C et 700, un durcissement par trempe se produit par transformation martensitique de l'austénite. Lors d'un refroidissement actif se produisant après le chauffage et avant le formage, le larget ou des parties de ce dernier ou bien le larget mis en forme ou des zones de ce dernier sont refroidis à une vitesse de refroidissement >15K/s.
EP11807691.8A 2010-12-24 2011-12-22 Procédé pour produire des éléments de construction durcis pourvus de zones de différentes duretés et/ou ductilités Active EP2655672B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE102010056265.3A DE102010056265C5 (de) 2010-12-24 2010-12-24 Verfahren zum Erzeugen gehärteter Bauteile
DE102010056264.5A DE102010056264C5 (de) 2010-12-24 2010-12-24 Verfahren zum Erzeugen gehärteter Bauteile
DE102011053939.5A DE102011053939B4 (de) 2011-09-26 2011-09-26 Verfahren zum Erzeugen gehärteter Bauteile
DE102011053941.7A DE102011053941B4 (de) 2011-09-26 2011-09-26 Verfahren zum Erzeugen gehärteter Bauteile mit Bereichen unterschiedlicher Härte und/oder Duktilität
PCT/EP2011/073889 WO2012085253A2 (fr) 2010-12-24 2011-12-22 Procédé pour produire des éléments de construction durcis pourvus de zones de différentes duretés et/ou ductilités

Publications (2)

Publication Number Publication Date
EP2655672A2 true EP2655672A2 (fr) 2013-10-30
EP2655672B1 EP2655672B1 (fr) 2020-12-16

Family

ID=45470542

Family Applications (5)

Application Number Title Priority Date Filing Date
EP11811026.1A Active EP2656187B1 (fr) 2010-12-24 2011-12-22 Procédé de fabrication de composants durcis
EP11808645.3A Active EP2655674B1 (fr) 2010-12-24 2011-12-22 Procédé de formage et de durcissement de tôles d'acier revêtues
EP11808211.4A Active EP2655673B1 (fr) 2010-12-24 2011-12-22 Procédé de fabrication de composants durcis
EP11811025.3A Active EP2655675B1 (fr) 2010-12-24 2011-12-22 Procédé pour produire des éléments de construction durcis pourvus de zones de différentes duretés et/ou ductilités
EP11807691.8A Active EP2655672B1 (fr) 2010-12-24 2011-12-22 Procédé pour produire des éléments de construction durcis pourvus de zones de différentes duretés et/ou ductilités

Family Applications Before (4)

Application Number Title Priority Date Filing Date
EP11811026.1A Active EP2656187B1 (fr) 2010-12-24 2011-12-22 Procédé de fabrication de composants durcis
EP11808645.3A Active EP2655674B1 (fr) 2010-12-24 2011-12-22 Procédé de formage et de durcissement de tôles d'acier revêtues
EP11808211.4A Active EP2655673B1 (fr) 2010-12-24 2011-12-22 Procédé de fabrication de composants durcis
EP11811025.3A Active EP2655675B1 (fr) 2010-12-24 2011-12-22 Procédé pour produire des éléments de construction durcis pourvus de zones de différentes duretés et/ou ductilités

Country Status (8)

Country Link
US (2) US10640838B2 (fr)
EP (5) EP2656187B1 (fr)
JP (2) JP2014507556A (fr)
KR (3) KR101582922B1 (fr)
CN (5) CN103384726B (fr)
ES (5) ES2853207T3 (fr)
HU (5) HUE052381T2 (fr)
WO (5) WO2012085247A2 (fr)

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DE102013100682B3 (de) * 2013-01-23 2014-06-05 Voestalpine Metal Forming Gmbh Verfahren zum Erzeugen gehärteter Bauteile und ein Strukturbauteil, welches nach dem Verfahren hergestellt ist
WO2015029653A1 (fr) * 2013-08-29 2015-03-05 Ｊｆｅスチール株式会社 Procédé de fabrication d'un élément pressé à chaud et élément pressé à chaud
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CN103392014A (zh) 2013-11-13
EP2655672B1 (fr) 2020-12-16
US20140020795A1 (en) 2014-01-23
ES2858225T8 (es) 2022-01-05
KR20130132565A (ko) 2013-12-04
JP2014507556A (ja) 2014-03-27
WO2012085251A3 (fr) 2012-08-16
KR20130126962A (ko) 2013-11-21
HUE054465T2 (hu) 2021-09-28
WO2012085248A2 (fr) 2012-06-28
JP2014505791A (ja) 2014-03-06
ES2851176T3 (es) 2021-09-03
ES2829950T8 (es) 2021-06-10
CN103547687A (zh) 2014-01-29
WO2012085251A2 (fr) 2012-06-28
CN103547686B (zh) 2016-11-23
WO2012085248A3 (fr) 2012-08-16
WO2012085253A3 (fr) 2012-08-16
EP2655673A2 (fr) 2013-10-30
ES2829950T3 (es) 2021-06-02
US10640838B2 (en) 2020-05-05
WO2012085253A2 (fr) 2012-06-28
KR20130132566A (ko) 2013-12-04
HUE054867T2 (hu) 2021-10-28
EP2656187A2 (fr) 2013-10-30
WO2012085256A2 (fr) 2012-06-28
HUE052381T2 (hu) 2021-04-28
CN103547686A (zh) 2014-01-29
CN103384726A (zh) 2013-11-06
HUE055049T2 (hu) 2021-10-28
ES2858225T3 (es) 2021-09-29
HUE053150T2 (hu) 2021-06-28
KR101582922B1 (ko) 2016-01-07
ES2853207T3 (es) 2021-09-15
WO2012085247A3 (fr) 2012-08-16
CN103384726B (zh) 2016-11-23
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