EP2964792B1 - Procédé servant à produire un produit plat en acier laminé à froid apte à l'emboutissage et à l'étirage, produit plat en acier et utilisation d'un produit plat en acier de ce type - Google Patents

Procédé servant à produire un produit plat en acier laminé à froid apte à l'emboutissage et à l'étirage, produit plat en acier et utilisation d'un produit plat en acier de ce type Download PDF

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Publication number
EP2964792B1
EP2964792B1 EP14708856.1A EP14708856A EP2964792B1 EP 2964792 B1 EP2964792 B1 EP 2964792B1 EP 14708856 A EP14708856 A EP 14708856A EP 2964792 B1 EP2964792 B1 EP 2964792B1
Authority
EP
European Patent Office
Prior art keywords
cold
flat steel
hot
steel product
rolling
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.)
Not-in-force
Application number
EP14708856.1A
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German (de)
English (en)
Other versions
EP2964792A2 (fr
Inventor
Erhard HOLLECK
Eberhard Sowka
Burkhard KAUP
Stephan SCHIESTER
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.)
ThyssenKrupp Steel Europe AG
ThyssenKrupp Rasselstein GmbH
Original Assignee
ThyssenKrupp Steel Europe AG
ThyssenKrupp Rasselstein GmbH
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Publication of EP2964792A2 publication Critical patent/EP2964792A2/fr
Application granted granted Critical
Publication of EP2964792B1 publication Critical patent/EP2964792B1/fr
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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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/126—Accessories for subsequent treating or working cast stock in situ for cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/14—Plants for continuous casting
    • 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
    • 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
    • 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
    • C21D8/041—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 involving a particular fabrication or treatment of ingot or slab
    • 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
    • C21D8/0447—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 heat treatment
    • C21D8/0463—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 heat treatment following hot rolling
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/04—Refining by applying a vacuum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/10—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor, e.g. slagging or scorifying agents
    • 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
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • 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
    • C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
    • 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
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/34—Pretreatment of metallic surfaces to be electroplated
    • C25D5/36—Pretreatment of metallic surfaces to be electroplated of iron or steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/005—Processes combined with methods covered by groups B21D1/00 - B21D31/00 characterized by the material of the blank or the workpiece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner

Definitions

  • the invention relates to a method for producing a cold-rolled, up to 0.5 mm thick flat steel product for deep-drawing and ironing applications. Moreover, the invention relates to a flat steel product produced according to such a method and to an advantageous use of a corresponding flat steel product.
  • the inclusions (oxides, sulfides) contained in the cast molten steel can neither rise during continuous casting nor strip casting due to the significantly higher casting speeds in the mold and can be deposited in the foundry slag.
  • the calcium aluminate inclusions resulting from the calcium-treated melts and remaining in the slab in the slab or thin slab are not comminuted during hot rolling, but retain their size. The same applies to strip casting.
  • Macroscopic Ca-aluminate inclusions can therefore, for example, cause shell defects on the product surface during cold-rolling or forming processes or, in the case of very thin end material, holes in the rolled material.
  • a method for producing a steel strip or sheet from a ULC steel in which a molten steel is cast into a slab or a cast strip containing (in% by weight) ⁇ 0.003% C, 0.05-0, 35% Mn, ⁇ 0.025% P, ⁇ 0.020% S, ⁇ 0.004% Si, ⁇ 0.002 Al, ⁇ 0.004% N, in total ⁇ 0.1% Cr, Cu, Ni, Sn and Mo, ⁇ 0.004% N, each ⁇ 0.005% Nb, Ti, Zr and V, ⁇ 0.0030% B and balance Fe and unavoidable impurities.
  • the steel melt according to the known method after its melting is first subjected to a vacuum treatment and then a ladle furnace treatment.
  • the purpose of the ladle furnace treatment is in particular the setting of a minimized oxygen and aluminum content in each obtained after casting thin slab or cast strip obtained after casting.
  • the oxygen activity of the molten steel for continuous casting or strip casting should be as low as possible in order to avoid pore formation in the cast product and casting defects.
  • the adjustment of the oxygen content or the oxygen activity is carried out by a targeted addition of aluminum in an amount that is determined depending on the result of monitoring the current oxygen activity of the melt according to the target that the oxygen content of the melt at the end of the pans Treatment is below 100 ppm.
  • the object to be solved by the invention was to provide a method by which can be produced in a reliable manner from thin slabs or cast strip a thin, maximum 0.5 mm thick cold-rolled steel flat product, which also meets the highest demands on his thermoforming and Ironing suitability is fair.
  • a correspondingly procured flat steel product and a particularly expedient use of such a flat steel product should be specified.
  • this object has been achieved according to the invention, that in the production of cold-rolled, up to 0.5 mm thick flat steel products for thermoforming and ironing the specified in claim 1 operations are passed.
  • a flat steel product produced in accordance with this invention is particularly suitable for thermoforming applications in which the tip heights determined according to ISO 11531 at a deep drawing ratio ⁇ of 1.8 and a cup diameter of 33 mm are in the range of 0.2 - 0.7 mm. Such conditions are particularly in so-called “twist-off closures” (cam latches) and “DRD Cans", but also in general before thin-walled beverage cans.
  • a steel melt is produced in step a) which contains (in% by weight) up to 0.008% C, up to 0.005% Al , up to 0.043% Si, 0.15-0.5% Mn, up to 0.02% P, up to 0.03% S, up to 0.020% N, and each optionally up to 0.03% Ti and up to to 0.03% Nb and balance iron and unavoidable impurities, with unavoidable impurities containing up to 0.08% Cr, up to 0.08% Ni, up to 0.08% Cu, up to 0.02 % Sn, up to 0.01% Mo, up to 0.0020% V, up to 0.007% B, up to 0.05% Co and up to 0.0060% Ca.
  • the S-contents of the melt according to the invention are typically in the range of 0.005-0.03 wt%.
  • the Al content of the melt is typically at least 0.001% by weight.
  • optimum Al contents of the molten steel ready for casting are in the range of 0.001-0.002% by weight.
  • the molten steel is subjected to a secondary metallurgical treatment, which, in addition to a conventional vacuum treatment, results in a ladle furnace.
  • Treatment includes.
  • the molten steel is held according to the invention under a slag, for whose Mn content% Mn and Fe content% Fe is% Mn +% Fe ⁇ 15 wt .-%, in particular ⁇ 9 wt .-%.
  • the measures provided for in the production of the molten steel according to the invention are based on the finding that the ladle slag must be kept well fluid for a good absorption of non-metallic inclusions in the melt. This can not be achieved by a conventional vacuum treatment in a RH or DH plant.
  • the ladle slag can be intensively liquefied via the heating with electrodes. As a result, it is very well suited to absorb non-metallic inclusions rising to the bath surface and thus further improve the degree of purity of the molten steel after the vacuum treatment.
  • the Fe content% Fe and Mn content% Mn of the ladle slag can be used as an indirect measure of the oxygen activity.
  • the sum% Fe +% Mn of the Fe and Mn contents of the ladle slag is set to less than 15% by weight, in particular ⁇ 9% by weight, it is ensured that the oxygen activity "a O -Melt" can be set in the optimum range of 40-60 ppm, without having to continuously perform a measurement of the oxygen content of the slag. This is especially true if the Fe content% Fe of the ladle slag is:% Fe ⁇ 10 wt .-%, in particular% Fe ⁇ 6 wt .-%.
  • the molten steel produced in the manner according to the invention is continuously cast into a strand in step b), from which one or more thin slabs are then separated in a conventional manner, which are then fed to further processing in a continuous process sequence.
  • the melt produced in accordance with the invention can be cast into a cast strip, for example by means of a two-roll strip casting device or according to the DSC process.
  • the thus obtained cast precursor in the form of a thin slab or a cast strip is then hot rolled in step c) in a conventional manner into a hot strip having a thickness of less than 2.5 mm, in particular less than 2.3 mm.
  • the respective precursor can be brought to a temperature of 1000 - 1250 ° C optimal for the further process sequence before hot rolling. This can be done for example by a targeted cooling of the case in this case for hot rolling still hot respectively cast precursor or by a targeted heating of the excessively cooled in this case precursor.
  • the hot rolling itself is optimally started with a hot rolling start temperature which is in the range of 950 - 1200 ° C and finished with a hot rolling end temperature which is in the range of 800 - 950 ° C.
  • the hot strip obtained is conventionally wound into a coil at a coiler temperature typically of 500 - 750 ° C.
  • the hot strip After cooling in the coil, the hot strip is cold rolled to the thickness of up to 0.5 mm, in particular at most 0.26 mm thick, cold-rolled steel flat product.
  • Cold rolling may be preceded by a surface treatment which mechanically or chemically removes scale and other contaminants adhering to the hot strip in a conventional manner.
  • the cold rolling itself can be carried out in one or more stages.
  • a recrystallizing intermediate annealing can be carried out between the cold rolling steps.
  • the first stage of cold rolling should be carried out with a degree of deformation of more than 85%, in particular more than 90%, and the second stage of cold rolling with a degree of deformation of 0.4-50%, in particular at least 1% , where degrees of deformation of 4 - 42% are particularly practical.
  • the resulting cold-rolled steel flat product can be provided with a protective coating for protection against corrosive attacks.
  • the cold-rolled steel flat product according to the invention can be coated with a metallic protective layer.
  • it can for example undergo an electrolytic tinning.
  • the method according to the invention can thus be avoided by the purity grade-based disadvantages of the production of particularly thin, designed for deep drawing and ironing cold rolled steel flat products via thin slab continuous casting and other near-net casting or casting rolling process, characterized in that the flat steel products based on a Alloy concept with minimized Al levels are generated. At such low Al contents can be dispensed with a Ca treatment of the melt, so that the formation of the deformation properties interfering calcium aluminates is excluded.
  • flat steel products produced according to the invention fulfill the highest demands on their formability. So they are suitable for all forming applications, for one according to ISO 11531 certain tension of less than 0.86 mm is required.
  • flat steel products according to the invention are suitable for uniformity-critical forming applications and sophisticated deep-drawing and ironing applications in which the di-minidity determined according to ISO 11531 is less than 0.7 mm.
  • flat steel products produced according to the invention are particularly suitable for the production of packaging for loose goods.
  • packages are typically cans and similar containers used for the packaging of food, beverages, pet food and other pourable, free-flowing or pourable goods and products.
  • goods and products also include, for example, general chemical or biological products, such as gases or aerosols.
  • flat steel products according to the invention can be used for the production of closures for such containers, bottle caps for closing bottles or spray cans.
  • the composition of the oxide limestone shorts remaining in the molten steel (size range ⁇ 10 ⁇ m) changes compared with aluminum tempering and production via a conventional continuous casting plant.
  • the inventively achieved minimization of the proportion of hard Al 2 O 3 particles in the structure of a flat steel product according to the invention results in the production of deep drawn or ironed products from a cold rolled flat steel product according to the invention not only to an optimal forming behavior of the material, but also to a significant increase in the service life of each forming tool used. Due to the low Al content, the nitrogen in the steel is not bound as AIN, but is essentially interstitially dissolved. This results in a significantly higher solidification potential.
  • very good rated samples can be used without restriction for all packaging steel applications.
  • "Satisfactory” rated samples can be used for certain non-critical packaging steel applications. In general, samples rated “Inadequate” are not suitable for packaging steel applications.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Claims (15)

  1. Procédé de fabrication d'un produit plat en acier laminé à froid d'une épaisseur de jusqu'à 0,5 mm pour des applications d'emboutissage et d'étirage, comprenant les étapes suivantes:
    a) la formation d'une masse fondue d'acier, qui (en % en poids) contient jusqu'à 0,008 % de C, jusqu'à 0,005 % d'Al, jusqu'à 0,043 % de Si, 0,15 à 0,5 % de Mn, jusqu'à 0,02 % de P, jusqu'à 0,03 % de S, jusqu'à 0,020 % de N, ainsi qu'à chaque fois éventuellement jusqu'à 0,03 % de Ti et jusqu'à 0,03 % de Nb, le reste étant du fer et des impuretés inévitables, dont les teneurs sont de jusqu'à 0,08 % de Cr, jusqu'à 0,08 % de Ni, jusqu'à 0,08 % de Cu, jusqu'à 0,02 % de Sn, jusqu'à 0,01 % de Mo, jusqu'à 0,0020 % de V, jusqu'à 0,007 % de B, jusqu'à 0,05 % de Co et jusqu'à 0,0060 % de Ca, la masse fondue d'acier étant soumise à un traitement métallurgique secondaire sans traitement au Ca, qui comprend en plus d'un traitement sous vide un traitement en four poche et pendant lequel la masse fondue d'acier à traiter est maintenue sous un laitier, dont la teneur en Mn %Mn et la teneur en Fe %Fe satisfont :

            %Mn + %Fe < 15 % en poids ;

    b) la coulée continue de la masse fondue d'acier en un filament et la séparation d'un lingot mince du filament ou en une bande coulée ;
    c) le laminage à chaud du lingot mince ou de la bande coulée en une bande chaude d'une épaisseur de moins de 2,5 mm ;
    d) le bobinage de la bande chaude en une bobine ;
    e) le laminage à froid de la bande chaude en le produit plat en acier laminé à froid d'une épaisseur de jusqu'à 0,5 mm.
  2. Procédé selon la revendication 1, caractérisé en ce que la teneur en A1 de la masse fondue d'acier est d'au plus 0,002 % en poids.
  3. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la teneur en Fe %Fe du laitier sous lequel la masse fondue d'acier est maintenu pendant le traitement en four poche est inférieure à 10 % en poids.
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la teneur en oxygène de la masse fondue d'acier à la fin du traitement en four poche est inférieure à 100 ppm.
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le lingot mince est porté à une température de 1 000 à 1 250 °C avant le laminage à chaud.
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la température initiale du laminage à chaud que présente le lingot mince au début du laminage à chaud est de 950 à 1 200 °C.
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la température finale du laminage à chaud que présente la bande chaude à la fin du laminage à chaud est de 800 à 950 °C.
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la bande chaude est bobinée à une température de dévidoir de 500 à 750 °C.
  9. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'épaisseur du produit plat en acier laminé à froid est inférieure à 0,26 mm.
  10. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le laminage à froid est réalisé en au moins deux étapes et le produit plat en acier laminé à froid est soumis à un recuit recristallisant entre les étapes du laminage à froid.
  11. Procédé selon la revendication 10, caractérisé en ce que le degré de déformation obtenu par la première étape de laminage à froid est supérieur à 85 % et le degré de déformation obtenu par la seconde étape de laminage à froid est de 0,4 à 50 %.
  12. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le produit plat en acier laminé à froid est galvanisé électrolytiquement.
  13. Produit plat en acier fabriqué par application du procédé selon l'une quelconque des revendications précédentes.
  14. Utilisation d'un produit plat en acier selon la revendication 13 pour la fabrication de boîtes pour produits alimentaires, aliments pour animaux, boissons ou autres matériaux de remplissage, tels que des produits chimiques ou biologiques, ou pour la fabrication de boîtes d'aérosol, de bouchons, de capsules ou de pulvérisateurs.
  15. Utilisation d'un produit plat en acier selon la revendication 13 pour des applications de transformation dont la formation de cornes déterminée selon ISO 11531 est < 0,86 mm.
EP14708856.1A 2013-03-07 2014-03-06 Procédé servant à produire un produit plat en acier laminé à froid apte à l'emboutissage et à l'étirage, produit plat en acier et utilisation d'un produit plat en acier de ce type Not-in-force EP2964792B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013102273.1A DE102013102273A1 (de) 2013-03-07 2013-03-07 Verfahren zum Erzeugen eines kaltgewalzten Stahlflachprodukts für Tiefzieh- und Abstreckziehanwendungen, Stahlflachprodukt und Verwendung eines solchen Stahlflachprodukts
PCT/EP2014/054368 WO2014135645A2 (fr) 2013-03-07 2014-03-06 Procédé servant à produire un produit plat en acier laminé à froid apte à l'emboutissage et à l'étirage, produit plat en acier et utilisation d'un produit plat en acier de ce type

Publications (2)

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EP2964792A2 EP2964792A2 (fr) 2016-01-13
EP2964792B1 true EP2964792B1 (fr) 2017-05-03

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EP14708856.1A Not-in-force EP2964792B1 (fr) 2013-03-07 2014-03-06 Procédé servant à produire un produit plat en acier laminé à froid apte à l'emboutissage et à l'étirage, produit plat en acier et utilisation d'un produit plat en acier de ce type

Country Status (8)

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US (1) US10184159B2 (fr)
EP (1) EP2964792B1 (fr)
CN (1) CN105189790A (fr)
CA (1) CA2903936C (fr)
DE (1) DE102013102273A1 (fr)
ES (1) ES2636187T3 (fr)
RU (1) RU2661687C2 (fr)
WO (1) WO2014135645A2 (fr)

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GB201205243D0 (en) 2012-03-26 2012-05-09 Kraft Foods R & D Inc Packaging and method of opening
GB2511560B (en) 2013-03-07 2018-11-14 Mondelez Uk R&D Ltd Improved Packaging and Method of Forming Packaging
GB2511559B (en) 2013-03-07 2018-11-14 Mondelez Uk R&D Ltd Improved Packaging and Method of Forming Packaging
JP5958630B2 (ja) * 2014-10-10 2016-08-02 Ｊｆｅスチール株式会社 王冠用鋼板およびその製造方法
MX2017010907A (es) * 2015-02-26 2017-11-24 Jfe Steel Corp Lamina de acero para tapa corona, metodo para fabricar lamina de acero para tapa corona y tapa corona.
KR102373161B1 (ko) * 2017-05-10 2022-03-10 현대자동차주식회사 부식환경에서 내식성을 향상시킨 차량용 저합금 내식강과 그 제조방법
RU2689491C1 (ru) * 2018-07-30 2019-05-28 Публичное акционерное общество "Северсталь" (ПАО "Северсталь") Способ производства тонких холоднокатаных полос для нанесения полимерного покрытия
CN111349869B (zh) * 2018-12-24 2021-10-22 宝山钢铁股份有限公司 一种高强度覆铝基板用钢及其制造方法
RU2758716C1 (ru) * 2020-08-20 2021-11-01 Публичное акционерное общество «Северсталь» (ПАО "Северсталь") Способ производства горячекатаного проката из инструментальной стали

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JP2575827B2 (ja) * 1988-07-18 1997-01-29 川崎製鉄株式会社 清浄度に優れた連続鋳造用極低炭素鋼の製造方法
FR2730942B1 (fr) * 1995-02-24 1997-05-16 Lorraine Laminage Procede d'elaboration d'une tole ou d'une bande en acier pour la realisation d'une boite et tole ou bande en acier obtenue par ce procede
FR2767078B1 (fr) * 1997-08-07 1999-10-22 Lorraine Laminage Procede d'elaboration d'une tole mince en acier a ultra bas carbone pour la realisation de produits emboutis pour emballage et tole mince obtenue
JP4013505B2 (ja) * 2000-11-27 2007-11-28 住友金属工業株式会社 極低炭素薄鋼板とその製造方法
JP3630136B2 (ja) * 2001-12-14 2005-03-16 住友金属工業株式会社 自動車用の極低炭素鋼の製造方法
JP4328124B2 (ja) * 2003-04-24 2009-09-09 新日本製鐵株式会社 缶特性が著しく良好な極薄容器用鋼板およびその製造方法
JP4214036B2 (ja) * 2003-11-05 2009-01-28 新日本製鐵株式会社 表面性状、成形性および加工性に優れた薄鋼板およびその製造方法
EP2459756B1 (fr) * 2009-07-30 2016-05-11 Tata Steel IJmuiden BV Procede de production d'un acier a faible teneur en carbone sous forme de brame, d'une bande ou de tôle
CN101941021B (zh) * 2010-08-13 2013-05-08 济南钢铁股份有限公司 一种基于asp工艺生产超深冲级冷轧钢板的方法

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Publication number Publication date
US20160010172A1 (en) 2016-01-14
RU2015142506A3 (fr) 2018-03-07
DE102013102273A1 (de) 2014-09-25
RU2015142506A (ru) 2017-04-12
CN105189790A (zh) 2015-12-23
RU2661687C2 (ru) 2018-07-19
CA2903936C (fr) 2018-04-17
CA2903936A1 (fr) 2014-09-12
WO2014135645A3 (fr) 2015-03-26
US10184159B2 (en) 2019-01-22
WO2014135645A2 (fr) 2014-09-12
EP2964792A2 (fr) 2016-01-13
ES2636187T3 (es) 2017-10-05

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