EP3980260A1 - Procédé de production d'un matériau composite en acier - Google Patents

Procédé de production d'un matériau composite en acier

Info

Publication number
EP3980260A1
EP3980260A1 EP20727599.1A EP20727599A EP3980260A1 EP 3980260 A1 EP3980260 A1 EP 3980260A1 EP 20727599 A EP20727599 A EP 20727599A EP 3980260 A1 EP3980260 A1 EP 3980260A1
Authority
EP
European Patent Office
Prior art keywords
steel
composite material
manganese
composite
hardened
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
EP20727599.1A
Other languages
German (de)
English (en)
Inventor
Reinhard Hackl
Christoph Etzlstorfer
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
Application filed by Voestalpine Stahl GmbH filed Critical Voestalpine Stahl GmbH
Publication of EP3980260A1 publication Critical patent/EP3980260A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • B32B15/011—Layered products comprising a layer of metal all layers being exclusively metallic all layers being formed of iron alloys or steels
    • 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
    • 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
    • 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
    • C21D6/002—Heat treatment of ferrous alloys containing Cr
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/008—Heat treatment of ferrous alloys containing Si
    • 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
    • C21D7/13—Modifying the physical properties of iron or steel by deformation by hot 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
    • 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
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • 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
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
    • C21D8/0426—Hot rolling
    • 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
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
    • C21D8/0436—Cold rolling
    • 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
    • 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
    • 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
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • 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
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing 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
    • 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
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • 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
    • C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
    • 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
    • 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
    • C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
    • 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
    • C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • 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
    • C23C2/04—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
    • C23C2/12—Aluminium 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/04—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of a rolling mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/02—Iron or ferrous alloys
    • B23K2103/04—Steel or steel alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0036—Heat treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/12—Deep-drawing
    • 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
    • C21D2251/00—Treating composite or clad material
    • C21D2251/02—Clad material

Definitions

  • the present invention relates to a method for producing a steel composite material and a steel composite material component which is produced according to this method.
  • Hardened steel components have the advantage, especially in the body shop of motor vehicles, that their excellent mechanical properties make it possible to create a particularly stable passenger cell without having to use components that would be much more massive and therefore heavier with normal strengths.
  • types of steel that can be hardened by quench hardening are used.
  • Such types of steel are, for example, boron-alloyed manganese carbon steels, the most widely used being the 22MnB5 or 20MnB8. However, other boron-alloyed manganese carbon steels are also used for this purpose.
  • the steel material In order to produce hardened components from these types of steel, the steel material must be heated to the austenitizing temperature (> AC3) and wait until the steel material is austenitized. Depending on the degree of hardness desired, partial or full austenitization can be achieved here.
  • a sheet steel blank is separated from a steel strip, e.g. Cut or punched and then deep-drawn into the finished component in a conventional, for example five-stage deep-drawing process.
  • This finished component is here Dimensioned slightly smaller in order to compensate for a subsequent thermal expansion during austenitizing.
  • the component produced in this way is then austenitized and then placed in a form hardening tool, in which it is pressed, but not or only slightly deformed, and the heat flows out of the component into the pressing tool as a result of the compression, at a rate above the critical hardening speed Speed.
  • the second, alternative method is the so-called press hardening, in which a blank is separated from a sheet steel strip, e.g. cut or punched, then the blank is austenitized and the hot blank is formed in a single-stage or multi-stage forming step and at the same time with a hardening speed above the critical hardening speed Speed is cooled.
  • metallic corrosion protection layers can be used, e.g. plates provided with zinc or an alloy based on zinc can be used.
  • Press hardening is also known as an indirect process and press hardening as a direct process. The advantage of the indirect process is that more complex workpiece geometries can be implemented.
  • the advantage of the direct process is that a higher degree of material utilization can be achieved.
  • the component complexity that can be achieved is lower, especially in the one-step forming process.
  • ready-formed and usually ready-perforated construction parts are passed through an oven and heated to austenitizing temperature during press hardening. These components are placed on furnace supports for transport.
  • the blanks must be conveyed through the furnace using chain conveyors or walking bars.
  • TPP Tailored Property Parts
  • Such components which are also referred to as Tailor Welded Parts (TWP), consist, for example, of a boron-manganese steel that can be hardened in the form or press hardening process, such as a 22MnB5 and, in addition, a microalloyed steel and other steels that are hardened show a different behavior compared to hardenable steels.
  • TWP Tailor Welded Parts
  • a press-hardened or form-hardened component has zones of different sheet metal thicknesses and thus also different properties.
  • Areas of different sheet metal thickness can also be made from different steel grades so that a thinner area consists of a first steel grade and a thicker area consists of a second steel grade, and both areas can also consist of one and the same steel grade.
  • edge carburization is carried out, the carbon diffusing into a workpiece from the outside, so that, depending on the carbon content, the edges can be hardened to a greater extent or by machining, in particular thermal treatment Edge decalcification is thereby compensated for again.
  • edge decarburization can be provided.
  • the corresponding temperature control and the corresponding gas control must be ensured in a relatively complex manner.
  • a steel sheet as a composite, the outer surfaces consisting of a different steel grade than the core.
  • three sheets for example a sequence of ABA, are rolled on top of one another, the A standing for steel grades that are located on the outer surface of the finished steel strip and the B for a steel quality that is embedded between the two outer steel grades.
  • the company ThyssenKrupp has published corresponding sandwich structures under the title BP3-Metall-Metallverbunde, whereby the outer sheets are high-carbon steels, while the inner steel sheet is a so-called low carbon steel.
  • This product is also known in reverse composition under the brand name Tribond®.
  • the high carbon content in one of the layers makes processing more difficult in production, especially during cold rolling.
  • WO 2017/054862 A1 a multilayer composite with an edge area and a core area is known, the edge area being designed to be softer and the total of carbon, silicon, manganese, chromium and nickel to be greater than 1.45% by weight.
  • chassis components with high operational stability consist of a multilayer composite and an optional remuneration consisting of flaring and tempering can be carried out.
  • a motor vehicle component is known from DE 10 2016 108836 A1, with so-called tailor-heated snow heating being carried out so that only certain areas are heated up quickly, the tensile strength R m preferably being 2000 MPa and thus 20 W> 6%. It can also be a multi-layer sheet, with an increased bending angle and optional partial annealing being disclosed here.
  • the object of the invention is to create a method for producing a steel composite material with which a steel composite material is obtained which has improved properties with regard to crash properties and formability.
  • a further object is to create a steel composite material which has improved crash properties and improved deformation properties.
  • edge decarburization for setting a strength / ductility profile is known, with the bending angle also being significantly increased here.
  • the optimum from bending angle to strength to yield limit comes up against a limit in spite of cladding layers with a higher-strength core.
  • the maximum or optimal performance can only be achieved in the resulting gradient material through an optimal structure of the composite material and ideal thermal conditioning of the individual layers. Accordingly, if the yield point or the strength properties are retained, the bending angle should be increased to improve the deformation properties.
  • a higher yield point and a higher strength should be achieved, with each layer being loaded to the maximum, with a higher bending angle being available at the same time and folding being made possible.
  • the possible edge materials should have a relatively low carbon content in order to improve the processability, i.e. the ductility in the edge area. These should contain little manganese and chromium and the loss of carbon should have little effect on the strength of the material. It also makes sense if the edge active substance contains few alloying elements and is therefore a so-called micro-alloyed steel. Steels of the following grades have proven to be suitable materials: 340LA; 420LA and conditionally 500LA. These are common material names that can be determined in the steel key, for example. The 340LA can also be found in ⁇ NORM EN 10346, for example. The designation can also be HX340LA or H340LA, the abbreviation in front of it denotes the various processing states and does not refer to the chemical composition itself.
  • Hardenable steels of the general alloy composition are also particularly suitable for the invention (all data in% by mass):
  • the remainder is iron and impurities from the melting process.
  • Hardenable steels of the preferred alloy composition are also particularly suitable for the invention (all data in% by mass):
  • the remainder is iron and impurities from the melting process.
  • Hardenable, manganese-containing steels of this alloy composition are particularly suitable for the invention (all data in% by mass):
  • Remainder iron and impurities caused by the melting process in particular the alloy elements boron, manganese, carbon and optionally chromium and molybdenum are used as conversion retarders in such steels.
  • At least one side of the composite material can be provided with a metallic coating, preferably before the form hardening process or press hardening process.
  • the coating metal can consist of a wide variety of alloys, nickel, copper, chromium, aluminum, magnesium, zinc or its alloy combination are preferred.
  • Aluminum-silicon alloys also known as usibor
  • zinc alloys based on zinc can particularly stand out.
  • the application can be carried out by means of conventional coating devices such as a hot-dip galvanizing plant or hot-dip aluminizing plant or an electrolytic coating plant.
  • the two outer sheets should each have a maximum of 25% of the total composite thickness, preferably less than 15%, particularly preferably less than 5%.
  • the entire composite has a thickness between 0.5 and 5 mm, preferably 0.5 to 3 mm.
  • the usual structure is thus A-B-A, with A being the outer layers made of a ferritic steel material and B the inner layer made of a hardenable boron-manganese steel material.
  • A-B-A can also be reversed into B-A-B.
  • the outer layers are harder than the middle layers.
  • a wear layer can be created or the composite can achieve a higher flexural strength, which enables higher power transmission.
  • the steel composite is formed from more than two different steel materials.
  • this can serve to ensure that, for example, in a five-day steel composite, the hardness decreases from the inside out and the elongation at break of each individual layer increases accordingly.
  • With the same ductility / same bending angle, a higher strength of the bond can be achieved.
  • FIG. 2 The shift in the bending angle in a steel composite material compared to a pure press-hardening boron-manganese steel without heat treatment according to the invention, ie. State of the art bending angle;
  • FIG. 3 The force profile in a bending angle test with the material according to the invention, on a comparison material made of a monolithic martensitic press-hardening steel and the material according to the invention at different heat treatment temperatures or durations;
  • FIG. 4 an exemplary temperature profile according to the invention for direct annealing after the press hardening process
  • FIG. 5 An exemplary temperature profile according to the invention for intermediate cooling to room temperature after the press hardening process.
  • an increase in the bending angle by at least 5 °, in particular at least 10 ° is to be achieved, with heat treatment being carried out at temperatures between 150 ° C. and 300 ° C.
  • the effect is rather low, while at 300 ° C a loss in strength can be observed. Therefore, ranges between 160 ° C and 250 ° C and more preferably between 175 ° C and 225 ° C are preferred.
  • the sensible annealing times range from 15 minutes (rather weak effect) to one hour (strong effect, however, the strength drops) so that 20 to 40 minutes are particularly preferred.
  • test results show bending angle improvements of up to 40 ° with an increase in the yield point and retention of the tensile strength. This effect can be observed in particular in FIG. All tests were carried out with a sample size of 30x60 mm and 1.5 mm thick sheet material.
  • FIG. 2 shows the shift in the curve of the monolithic material (in this example a phs-ultraform 1500) with a higher-strength composite material (1700s) too slightly improved bending angle, but this improvement is bought at the expense of strength. Furthermore, the total area under the curve remains essentially constant. This shows that when selecting the materials for the composite material alone, ie. Without heat treatment according to the invention, no significant improvements in the mechanical characteristics can be achieved.
  • FIG. 3 it can be seen how, compared with the composite material from FIG. 2, the composite materials are shifted significantly to improved values after a temperature treatment with regard to the bending angle, without there being any loss of strength or at most slight loss of strength.
  • the significant improvement in the mechanical properties is particularly evident from the significant increase in the area under the curve.
  • FIGS. 4 and 5 show possible temperature profiles for the method according to the invention.
  • the residual heat after the press hardening process can be used for the heat treatment, as shown in FIG.
  • the cooling must take place at least to below the respective Ms point in any case above the critical cooling rate, since otherwise no martensitic structure would form.
  • This method offers the advantage that it requires less energy or heat input, since cooling is stopped at the desired target temperature.
  • the invention has the advantage that the bending angle and thus the crash behavior and deformation behavior is improved by a heat treatment at low temperatures without the strength properties of the steel composite material being impaired.

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Abstract

L'invention concerne un procédé de production d'un composite en acier, dans lequel au moins deux tôles d'acier qui se composent d'au moins deux nuances d'acier différentes, en particulier une première nuance d'acier constituée d'un acier durcissable contenant du manganèse et une deuxième nuance d'acier constituée d'un acier micro-allié, sont placées l'une au-dessus de l'autre et sont plaquées par laminage à chaud, et le matériau composite ainsi obtenu est ensuite éventuellement laminé à froid, et après le laminage, le matériau composite constitué d'au moins deux couches de composition d'acier différente étant durci par trempage ou pressage, le matériau composite étant soumis à un traitement thermique subséquent, le matériau composite étant traité thermiquement pendant 15 minutes à 60 minutes entre 150° C et 300° C pour augmenter l'angle de flexion d'au moins 5°.
EP20727599.1A 2019-06-05 2020-05-18 Procédé de production d'un matériau composite en acier Pending EP3980260A1 (fr)

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DE102019115165.1A DE102019115165A1 (de) 2019-06-05 2019-06-05 Verfahren zum Erzeugen eines Stahlverbundwerkstoffs
PCT/EP2020/063835 WO2020244915A1 (fr) 2019-06-05 2020-05-18 Procédé de production d'un matériau composite en acier

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DE102008022709A1 (de) 2008-05-07 2009-11-19 Thyssenkrupp Steel Ag Verwendung eines metallischen Verbundwerkstoffs in einer Fahrzeugstruktur
EP2286332A1 (fr) 2008-05-20 2011-02-23 Nokia Corporation Procédé et appareil pour signaler une prise en charge de décalage temporel
DE102014112755B4 (de) * 2014-09-04 2018-04-05 Thyssenkrupp Ag Verfahren zum Umformen eines Werkstücks, insbesondere einer Platine, aus Stahlblech
US20180272461A1 (en) 2015-09-30 2018-09-27 Thyssenkrupp Steel Europe Ag Steel workpiece with improved surface quality
DE102016108836B4 (de) 2016-05-12 2018-05-24 Benteler Automobiltechnik Gmbh Kraftfahrzeugbauteil sowie Verfahren zu dessen Herstellung
DE102016115036A1 (de) * 2016-08-12 2018-02-15 Thyssenkrupp Ag Fahrwerkskomponente mit hoher Betriebsfestigkeit
RU2718021C1 (ru) * 2017-02-20 2020-03-30 Ниппон Стил Корпорейшн Горячештампованное изделие
DE102017110851B3 (de) * 2017-05-18 2018-08-02 Voestalpine Stahl Gmbh Verfahren zum Erzeugen von Stahlverbundwerkstoffen

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