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WO2024165168A1 - Procédé de production d'éléments en acier trempé - Google Patents

Procédé de production d'éléments en acier trempé Download PDF

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Publication number
WO2024165168A1
WO2024165168A1 PCT/EP2023/053330 EP2023053330W WO2024165168A1 WO 2024165168 A1 WO2024165168 A1 WO 2024165168A1 EP 2023053330 W EP2023053330 W EP 2023053330W WO 2024165168 A1 WO2024165168 A1 WO 2024165168A1
Authority
WO
WIPO (PCT)
Prior art keywords
hardening
cold
component
tool
finished
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.)
Ceased
Application number
PCT/EP2023/053330
Other languages
German (de)
English (en)
Inventor
Andreas Sommer
Florian Gerstner
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 Metal Forming GmbH
Original Assignee
Voestalpine Metal Forming 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 Voestalpine Metal Forming GmbH filed Critical Voestalpine Metal Forming GmbH
Priority to CN202380011151.4A priority Critical patent/CN118786228A/zh
Priority to PCT/EP2023/053330 priority patent/WO2024165168A1/fr
Priority to EP23704775.8A priority patent/EP4662340A1/fr
Publication of WO2024165168A1 publication Critical patent/WO2024165168A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • 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
    • C21D1/185—Hardening; Quenching with or without subsequent tempering from an intercritical temperature
    • 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
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • 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
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron

Definitions

  • the invention relates to a method for producing hardened sheet steel components.
  • press hardening also known as the direct process.
  • press hardening a sheet steel component is produced by heating a flat plate made of a hardenable steel to a temperature that is above the austenitizing temperature, so that the structure of the steel is at least partially in the high-temperature modification, namely austenite.
  • This flat plate is then formed into a desired shape in a forming tool, preferably with a single forming stroke, and the contact with the forming tool halves removes the heat from the steel material so quickly that martensitic hardening occurs, in which the austenite is essentially converted into martensite.
  • the speed of heat dissipation must be above the so-called critical hardening rate, which is usually above 20 Kelvin per second.
  • This press hardening process has been known and introduced for a long time and is used in particular to produce components whose shape is not so complex that it cannot be produced with a single press stroke.
  • a second known method was developed by the applicant, it is the so-called form hardening, also called the indirect method and known from EP1651789B1.
  • Form hardening allows the creation of significantly more complex shapes.
  • a sheet steel plate or a sheet steel strip is first cold formed into a prefabricated part in a conventional manner.
  • This cold forming takes place as generally Usually, for example, in a press line with, for example, five forming presses and so-called step tools or in a transfer press with so-called transfer tools, where a flat sheet steel blank or a sheet steel strip is formed and trimmed step by step into a complex prefabricated part.
  • the cold-formed pre-component is then usually heated in a furnace, for example in a continuous furnace or a multi-layer chamber furnace, to a temperature above the austenitizing temperature in order to also achieve a largely or completely austenitic state of the steel structure.
  • This already formed and heated pre-component is then placed in a so-called form hardening tool and cooled and thus hardened in the form hardening tool by applying the form hardening tool surfaces at a speed above the critical hardening speed.
  • the preceding cold forming is carried out in such a way that a dimensional change of the pre-component (caused by expansion in the furnace, shrinkage during phase transformation, further expansion in the furnace and shrinkage during transfer from the furnace to the form hardening tool) is taken into account by a correspondingly smaller forming in all three spatial directions, so that the size of the inserted heated pre-component matches the size of the form hardening tool.
  • Smartform technology discloses upsetting with compressive stress in order to produce a cold-formed part that is as precise as possible.
  • EP2848715A1 discloses an electrolytic coating of a steel plate for the hot forming process, whereby this coating should be deposited as thinly as possible in order to enable a high flexibility of the processing properties.
  • EP2338618B1 describes a hybrid of indirect and direct process with trimming step after cold forming and after final forming with laser or water jet. cutting.
  • the proportion of cold forming is defined as 50-80% of the drawing depth of the finished component.
  • the advantage of the hot-forming process is that the usual cold multi-stage forming allows a significantly more complex component shape than the direct process.
  • the sheet steel components can offer corrosion protection even in the hardened state if the plate or strip is provided with a metallic corrosion protection layer, in particular with a metallic corrosion protection layer based on zinc.
  • a cold-formed pre-component which is already fully formed and which is reduced in size in all three spatial directions in order to compensate for a later dimensional change is heated to the austenitizing temperature required for hardening and then placed in the form hardening tool in which it is pressed on all sides with minimal corrections, in particular corrections for heating-related distortion, and quench-hardened by the all-round contact of the forming tools.
  • the object of the invention is to provide a method for producing hardened sheet steel components which enables more flexible and economical production.
  • the inventors have recognized that the advantage of the direct process is that only a single hot forming tool is needed, but the disadvantage is that only simple geometries are possible and, in addition, the external trimming and the creation of a hole pattern must be carried out in the hardened state.
  • the advantage of the indirect process is that no hard trimming or laser trimming is required after hardening, as the external surface and hole pattern are already created in the cold forming process before hardening.
  • more complex geometries can be created due to the multi-stage cold forming.
  • a cold forming tool set is also required, i.e. several cold forming tools arranged one after the other, for example five cold forming tools and the associated presses.
  • a cold forming tool within the meaning of the invention is one of the tools of a cold forming tool set of, for example, step or transfer tools, in which a sheet steel blank or a sheet steel strip is successively formed into a component in a multi-stage forming and trimming process by a combination of mainly deep drawing, trimming and post-forming.
  • Liquid metal embrittlement can be counteracted by using steel grades with a delayed transformation, pre-cooling them below the liquidus point of the zinc alloy coating before forming and only then forming them. This is disclosed, for example, in DE102015113056.
  • VME vapor metal embrittlement
  • the insertion temperature within the meaning of the invention is the temperature of the pre-component shortly after its insertion into the tool before reaching the bottom dead center of the tool, i.e. at the beginning of the final forming process.
  • warm post-forming can also be referred to as warm final forming.
  • the components may also be useful to design the components with certain overhangs, e.g. in the area of the flanges, which are used for example for handling from cold forming into the furnace, in the furnace and for handling from the furnace. to the form hardening tool as well as for the stable insert in the form hardening tool and to subsequently reshape these few protrusions in the form hardening tool.
  • austenitized cold-formed parts can be locally and definedly further formed or fully formed in the die hardening tool despite high zinc coatings and despite high insertion temperatures, even without pre-cooling, with good properties regarding microcracks, mechanical parameters, layer thicknesses, etc.
  • microcracks caused by VME and/or LME can be prevented, if necessary, by targeted local injection of air.
  • smaller reshapings i.e. undulations up to a height of a few millimeters, can be realized without microcracks even without injection of air.
  • the geometric deviations between the component geometry after cold forming and the component geometry after the hot forming process must be at least 1 mm, particularly in the case of waviness.
  • a steel sheet plate or a steel strip which is formed with a metallic corrosion protection layer, in particular with a metallic corrosion protection layer based on zinc, which has a layer thickness of 7 pm to 20 pm per side.
  • the coating can be a Z120 or Z140 or Z180 according to DIN EN 10346.
  • Zinc-based corrosion protection layers can have a comparatively high zinc content of 85% to 98% by weight and, in addition to unavoidable impurities, also contain aluminum in the range of 0.2 to 2% by weight. They can also contain other oxygen-affine elements such as magnesium.
  • the metallic anti-corrosive layer based on zinc can be applied using a hot-dip process.
  • This can be a simple and robust method of application.
  • 85-99% of the area is cold-formed (and thus only hardened during the mold hardening process) and 1-15% of the area is hot-formed and hardened during the mold hardening process.
  • the percentage of the component surfaces that are hot-formed and hardened is calculated in such a way that component areas with geometric deviations from the state before form hardening (i.e. after cold forming) are added to the state after form hardening and related to the entire surface of the component after form hardening (i.e. the finished part).
  • the slightest deviation in the sense of hot calibration i.e. deviations of less than 1 mm from the component geometry after form hardening and known springback effects of the material such as frame and flange projections from cold forming are not taken into account.
  • this can be used to correct any waviness from cold forming, which is usually difficult to avoid in cold forming or causes greater effort if avoided.
  • the invention therefore relates in particular to a method for producing hardened steel components, in which a steel sheet blank made of a hardenable steel, which is formed with a metallic corrosion protection layer, in particular with a metallic corrosion protection layer based on zinc, is first cold formed, the cold preformed pre-component thus obtained is then completely or partially austenitized by heating and then inserted into a form hardening tool, wherein the insertion temperature is at least 500 °C, in particular greater than 600 °C, and is cooled in the form hardening tool by contact with the mold at a speed above the critical hardening speed and is thereby quench hardened and formed into the finished component, wherein the metallic corrosion protection layer has a layer thickness of 7 pm to 20 pm per side, wherein 85-99 area% are cold-finished formed areas and 1-15 area- % of the hot-finished areas during the form hardening process are present, based on the total surface area of the finished component.
  • This preferred surface distribution of cold and hot finished surfaces can optimally combine both the advantages of saving entire cold forming tools and the advantages of saving correction loops and material expenditure to eliminate cold forming waviness with process-reliable hot forming components during the die hardening.
  • One embodiment provides that 90-98% of the area are cold-finished areas and 2-10% of the area are hot-finished areas during the mold hardening process, based on the total area of the finished component.
  • One embodiment provides that the cold forming is carried out in three to ten cold forming tools and the form hardening and the final forming in the warm state are carried out in one tool, namely the form hardening tool.
  • One embodiment provides that deviations to be formed after cold forming from the geometry of the hardened, i.e. the finished, component, in particular in the case of waviness, have a deviation of at least 1 mm from the geometry in order to count as a surface that has been hot-formed during the form hardening.
  • One embodiment provides that before the mold hardening and during or after the heated preformed component is placed in the mold hardening tool, the mold hardening tool and/or the preformed component are blown or blown in or flushed with an oxygen-containing gas, in particular air. This can further reduce the possible risk of micro-cracking caused by LME and/or VME in the case of unfavorable geometric conditions.
  • One embodiment provides that before the mold hardening and during or after the insertion of the heated preformed component into the mold hardening tool, the preformed component is blown with an oxygen-containing gas, in particular air, exclusively in those areas which will experience a deformation of more than 5 mm in the mold hardening tool.
  • the metallic, in particular alloy-galvanized, corrosion protection layer has a layer thickness of 10 pm to 15 pm per side. This can further increase the corrosion protection, in particular cathodic corrosion protection.
  • One embodiment provides that the metallic, in particular alloy-galvanized, corrosion protection layer was applied by means of a hot-dip galvanizing process. This can represent a particularly simple and robust coating process.
  • the steel strip is made of a hardenable steel alloy, in particular a boron-manganese steel.
  • a hardenable steel alloy in particular a boron-manganese steel.
  • this can be a 22MnB5 or 34MnB5 steel alloy.
  • One embodiment provides that a material is used as the steel material which is transformation-retarded with respect to the austenite-martensite transformation during cooling, wherein the strip is hot- or cold-rolled.
  • One embodiment provides that a steel strip with the following composition is used (all data in % by weight):
  • Carbon up to 0.4, preferably 0.15 to 0.3
  • Silicon up to 1.9, preferably 0.11 to 1.5
  • Chromium up to 1.5, preferably 0.1 to 0.9
  • Molybdenum up to 0.9, preferably 0.1 to 0.5
  • Titanium up to 0.2 preferably 0.02 to 0.1
  • Aluminium up to 0.2, preferably 0.02 to 0.07
  • Figure 1 the comparison of the result of cold forming according to the prior art in contrast to the result of cold forming according to the invention and the form hardening according to the invention in a highly schematic form;
  • Figure 2 exemplary permissible waviness in the cold-formed part according to the invention
  • Figure 3 the drawing of an exemplary component in a perspective view before and after die hardening
  • Figure 4 the component according to Figure 3 with marked deformations during
  • Figure 5 an exemplary sequence of operations of a cold forming tool set (transfer tools) and the form hardening tool in the production of the component according to Figure 3 according to the prior art and according to the method according to the invention;
  • Figure 6 an exemplary sequence of operations of a cold forming tool set (step tools) and the form hardening tool in the production of a component according to the prior art and according to the method according to the invention;
  • Figure 7 Schematic of the form hardening process from the board to the finished component.
  • KU SdT i.e. cold forming according to the state of the art.
  • the cold forming according to the invention allows, as shown in Figure 2, certain wavinesses (greater than 1mm).
  • the wavinesses are the die hardening tool surfaces are leveled so that the finished component has smoothed waviness.
  • the right-hand column shows that a subsequent forming in the flange area, in this case a raising process in the form hardening tool, takes place, i.e. it is hot formed with a raising jaw in the form hardening tool ( Figure 1, right-hand column, bottom row - FH Erf.).
  • a cold forming step and thus possibly an entire cold forming tool can be saved.
  • the entire component must be completely formed in the cold forming ( Figure 1, right-hand column, top row - KU SdT).
  • Figures 3 and 4 show corresponding components in which post-embossing or post-forming operations were carried out at the marked locations, which had no negative impact on the mechanical properties of the component and also did not produce any microcracks or similar, even though a relatively thick zinc layer was present.
  • the total component surface of the finished component was 1236 cm 2 , although the proportion of component surface with deviations (greater than 1 mm) after cold forming and before form hardening from the geometry of the finished component was 38 cm 2 . Therefore, the percentage of component surfaces after cold forming with a deviation from the component geometry of the finished component was 3.1%. The surface distribution measured on the finished component is therefore 96.9% cold-formed areas and 3.1% hot-formed areas during form hardening.
  • Figures 5 and 6 show corresponding comparisons of exemplary operation sequences in the manufacture of such an exemplary component according to the prior art to the invention. It can be seen that one operation step, i.e. one cold forming tool, could be saved in the cold forming. With the transfer tool set (Fig. 5), it was one operation step out of seven necessary steps in the process according to the prior art. The local post-forming, i.e. the raising of the flange, could be completely shifted to the form hardening process (i.e. hot forming). With the step tool set (Fig. 6), one operation step out of five could be saved. The manufacturing the final trimming edge (FBK), i.e.
  • FBK final trimming edge
  • the final trimming could be integrated in operation step 4 and the post-forming and bending in the form hardening process (i.e. hot forming).
  • the post-forming and bending in the form hardening process i.e. hot forming.
  • three to ten cold forming steps may be necessary for the method according to the invention, but one step can be saved compared to the state of the art method. This means that in the
  • the advantage of the invention is that the overall manufacturing effort and thus also the costs can be reduced because the process is considerably more tolerant of inaccuracies that occur during the process and also enables other deliberate measures to simplify component handling and at the same time achieve a component with the desired and necessary properties.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

L'invention concerne un procédé de production d'éléments en acier trempé, une substrat du type feuille d'acier constitué d'un acier pouvant être trempé, qui est pourvu d'une couche anticorrosion métallique, en particulier d'une couche anticorrosion métallique à base de zinc, étant d'abord formé à froid, et la pièce préliminaire préformée à froid ainsi obtenue étant ensuite entièrement ou partiellement austénitisée par chauffage et étant par la suite insérée dans un outil de trempe à la presse, la température d'insertion étant supérieure ou égale à 500 °C, en particulier supérieure à 600°C, et étant refroidie dans l'outil de trempe à la presse par contact avec l'outil de trempe à la presse à une vitesse supérieure à la vitesse de trempe critique et étant ainsi durcie par trempe et mise en forme sous la forme de l'élément fini, la couche anticorrosion métallique présentant une épaisseur de couche de 7 µm à 20 µm par côté, des régions finies à froid représentant de 85 à 99 % de la surface et des régions finies à chaud représentant de 1 à 15 % de la surface par rapport à la surface totale de l'élément fini.
PCT/EP2023/053330 2023-02-10 2023-02-10 Procédé de production d'éléments en acier trempé Ceased WO2024165168A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202380011151.4A CN118786228A (zh) 2023-02-10 2023-02-10 制备硬化钢部件的方法
PCT/EP2023/053330 WO2024165168A1 (fr) 2023-02-10 2023-02-10 Procédé de production d'éléments en acier trempé
EP23704775.8A EP4662340A1 (fr) 2023-02-10 2023-02-10 Procédé de production d'éléments en acier trempé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2023/053330 WO2024165168A1 (fr) 2023-02-10 2023-02-10 Procédé de production d'éléments en acier trempé

Publications (1)

Publication Number Publication Date
WO2024165168A1 true WO2024165168A1 (fr) 2024-08-15

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PCT/EP2023/053330 Ceased WO2024165168A1 (fr) 2023-02-10 2023-02-10 Procédé de production d'éléments en acier trempé

Country Status (3)

Country Link
EP (1) EP4662340A1 (fr)
CN (1) CN118786228A (fr)
WO (1) WO2024165168A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006015849A2 (fr) 2004-08-09 2006-02-16 Voestalpine Automotive Holding Gmbh Procede pour produire des composants trempes en feuilles d'acier
EP1651789B1 (fr) 2003-07-29 2010-08-25 Voestalpine Stahl GmbH Procede de production d'elements constitutifs en tole d'acier trempe
EP2338618A1 (fr) * 2008-10-16 2011-06-29 Hyundai Hysco Procédé de fabrication d'un corps en acier très résistant pour la fabrication de produits de forme complexe
EP2848715A1 (fr) 2013-09-13 2015-03-18 ThyssenKrupp Steel Europe AG Procédé de fabrication d'un composant en acier revêtu d'une coiffe métallique protégeant de la corrosion
DE102015113056A1 (de) 2015-08-07 2017-02-09 Voestalpine Metal Forming Gmbh Verfahren zum kontaktlosen Kühlen von Stahlblechen und Vorrichtung hierfür
DE102016102344A1 (de) 2016-02-10 2017-08-10 Voestalpine Metal Forming Gmbh Verfahren und Vorrichtung zum Erzeugen gehärteter Stahlbauteile
DE102020200808A1 (de) 2020-01-23 2021-07-29 Thyssenkrupp Steel Europe Ag Verfahren zur Herstellung eines zumindest teilbereichsweise gehärteten Blechbauteils aus Stahl und ein zumindest teilbereichsweise gehärtetes Blechbauteil aus Stahl

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1651789B1 (fr) 2003-07-29 2010-08-25 Voestalpine Stahl GmbH Procede de production d'elements constitutifs en tole d'acier trempe
EP2177641B1 (fr) * 2003-07-29 2013-04-24 voestalpine Stahl GmbH Tôle d'acier comprenant une revetement contre la corrosion a base de zinc
WO2006015849A2 (fr) 2004-08-09 2006-02-16 Voestalpine Automotive Holding Gmbh Procede pour produire des composants trempes en feuilles d'acier
EP2338618A1 (fr) * 2008-10-16 2011-06-29 Hyundai Hysco Procédé de fabrication d'un corps en acier très résistant pour la fabrication de produits de forme complexe
EP2338618B1 (fr) 2008-10-16 2018-08-15 Hyundai Steel Company Procédé de fabrication d'un corps en acier très résistant pour la fabrication de produits de forme complexe
EP2848715A1 (fr) 2013-09-13 2015-03-18 ThyssenKrupp Steel Europe AG Procédé de fabrication d'un composant en acier revêtu d'une coiffe métallique protégeant de la corrosion
DE102015113056A1 (de) 2015-08-07 2017-02-09 Voestalpine Metal Forming Gmbh Verfahren zum kontaktlosen Kühlen von Stahlblechen und Vorrichtung hierfür
DE102016102344A1 (de) 2016-02-10 2017-08-10 Voestalpine Metal Forming Gmbh Verfahren und Vorrichtung zum Erzeugen gehärteter Stahlbauteile
US20190047032A1 (en) * 2016-02-10 2019-02-14 Voestalpine Stahl Gmbh Method and device for producing hardened steel components
DE102020200808A1 (de) 2020-01-23 2021-07-29 Thyssenkrupp Steel Europe Ag Verfahren zur Herstellung eines zumindest teilbereichsweise gehärteten Blechbauteils aus Stahl und ein zumindest teilbereichsweise gehärtetes Blechbauteil aus Stahl

Also Published As

Publication number Publication date
EP4662340A1 (fr) 2025-12-17
CN118786228A (zh) 2024-10-15

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