EP2467221B1 - Procédé de production de feuillards à chaud par coulée de bandes minces aux caractéristiques de matériau réglables sur la section transversale de la bande - Google Patents

Procédé de production de feuillards à chaud par coulée de bandes minces aux caractéristiques de matériau réglables sur la section transversale de la bande Download PDF

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Publication number
EP2467221B1
EP2467221B1 EP10749463.5A EP10749463A EP2467221B1 EP 2467221 B1 EP2467221 B1 EP 2467221B1 EP 10749463 A EP10749463 A EP 10749463A EP 2467221 B1 EP2467221 B1 EP 2467221B1
Authority
EP
European Patent Office
Prior art keywords
strip
gas
jet
material properties
hot
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
EP10749463.5A
Other languages
German (de)
English (en)
Other versions
EP2467221A1 (fr
Inventor
Karl-Heinz Spitzer
Volker Flaxa
Joachim Kroos
Hellfried Eichholz
Markus SCHÄPERKÖTTER
Rune SCHMIDT-JÜRGENSEN
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.)
Salzgitter Flachstahl GmbH
Original Assignee
Salzgitter Flachstahl GmbH
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Filing date
Publication date
Application filed by Salzgitter Flachstahl GmbH filed Critical Salzgitter Flachstahl GmbH
Publication of EP2467221A1 publication Critical patent/EP2467221A1/fr
Application granted granted Critical
Publication of EP2467221B1 publication Critical patent/EP2467221B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0631—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a travelling straight surface, e.g. through-like moulds, a belt

Definitions

  • the invention relates to a method for producing hot strip by means of strip casting with adjustable over the strip cross-section material properties according to the preamble of claim 1.
  • the primary material suppliers try to meet these requirements by providing load-optimized steel sheets or strips (eg Taylored welded or Taylored rolled blanks), which are optimized for sheet thickness according to the expected loads or consist of materials of different strengths.
  • load-optimized steel sheets or strips eg Taylored welded or Taylored rolled blanks
  • Such steel sheets or strips must meet comparatively high requirements in terms of strength, ductility, toughness, energy absorption and processability, for example by cold forming, welding and / or surface treatment.
  • a disadvantage in the production of load-optimized steel sheets are the elaborate cutting and joining processes and sharp property gradients in the material transition in the welded sheet metal blanks.
  • a method for producing a composite steel strip is z. B. from the DE 101 24 594 A1 known. Thereafter, a ferritic core tape directly cast by the two-roll method is plated with an austenitic or high-alloy ferritic plating tape.
  • a method for producing hot strips of lightweight steel by means of a horizontal strip caster is z. B. from the Journal of Steel Research 74 (2003), no. 11/12, page 724 - 731 , known.
  • melt is fed from a feed vessel via a runner onto a revolving casting belt of a horizontal strip casting plant.
  • the abandoned melt solidifies to a pre-strip with a thickness in the range between 6 - 20 mm. After solidification, the pre-strip is subjected to a hot rolling process.
  • the publication DE 199 18 581 A1 discloses the casting of thin strips of carbon steels, wherein the strip strength is increased by subjecting the strip to a carburizing or nitriding treatment. This can be done directly after casting or after casting and subsequent cold rolling and annealing.
  • the object of the invention is to specify a method for producing composite materials with a steel matrix by means of horizontal strip casting, with which the required material properties can be set variably over the strip cross section.
  • the teaching of the invention acts on the still liquid and / or just beginning of solidification steel melt from a metallic and / or non-metallic, the material properties of the hot strip influencing elements existing gas or plasma jet, wherein by changing the acting kinetic energy of the gas or plasma , the gas partial pressure and / or the applied temperature, the concentration of the introduced via the gas or plasma jet into the melt and there einiffund Schlierenden elements over the strip thickness and bandwidth is set.
  • the inventive method is basically suitable for the production of hot strips of various metallic materials, especially for high-alloy lightweight steels.
  • the method according to the invention offers for the first time in an advantageous manner the possibility of specifically taking into account the specific requirements of the material properties of the finished component, in which these can be adjusted in a targeted manner both via the strip thickness and over the strip width.
  • gaseous, vaporous or in the state of the plasma alloy constituents are applied by means of appropriate deposition on the matrix of still liquid or just beginning to solidification molten steel, wherein the gas or plasma vapor contained metallic and / or non-metallic elements in the matrix diffuse.
  • These may, for example, also be alloying elements in which the solubility in the iron is limited at normal liquidus temperatures and thus can not be introduced into the matrix via conventional production processes due to material incompatibilities, metallurgical segregation, evaporation, etc.
  • gas jet solid particles such.
  • metal or ceramic particles are added (aerosols), so that are provided with corresponding novel properties with the inventive method completely novel composite or gradient materials.
  • the gas z. B. from N 2 , CO, CO 2 , inert or reducing gases and, depending on requirements cold or preheated impinge on the molten bath surface.
  • the gas molecules By adjusting the kinetic energy of the gas partial pressure and optionally the temperature, the gas molecules, starting from the strip surface, diffuse with a specifically adjustable gradient in the strip thickness direction and correspondingly influence the material properties of the solidified strip.
  • a hardness gradient can be set in a targeted manner via the strip thickness.
  • the plasma z. B. also consist of metal vapors, which any alloying elements can be introduced into the material in order to influence the material properties targeted.
  • the gas or plasma jet is applied over the entire width of the casting belt or is variably adjustable.
  • the casting belt across the width only partially applied to the required locations or over the entire width.
  • the material properties over the length of the cast strip can be adjusted via a variable gas or plasma jet.
  • This can be achieved, for example, by activating or deactivating the gas or plasma jet loading, which is normally arranged in a stationary manner during the belt transport, or steers in its intensity steplessly or stepwise.
  • the loading of the belt with a gas or plasma jet can not only be used for introducing elements into the strip material but also advantageously the energy contained in the plasma jet can be used, for example, to subject elements already introduced by a gas jet to a targeted heat treatment for example, a diffusion gain to achieve.
  • the plasma jet z. B. targeted "traces" are introduced with altered material properties in the band.
  • FIG. 1 are shown in the schematic representation of a horizontal strip casting the principle possible Einwirkstellen for the gas or plasma jets targeted for influencing the material properties of the steel strip.
  • a melting vessel 1 is fed from the liquid molten steel 8 via a feed vessel 2 of a runner 3, so that the melt 8 is fed through a pouring nozzle 4 on to a front guide roller 6 and rear guide roller 7 encircling casting belt 5.
  • the casting belt 5 is supported between the deflecting rollers 6 and 7 by carrying rollers 9 between which cooling nozzles 10 are arranged for belt cooling.
  • the illustrated rotation arrows on the deflection rollers 6 and 7 characterize the conveying direction of the solidifying cast strand 11.
  • the melt is still liquid at the top of the strand.
  • the melt is inoculated with gas / vapor-shaped metallic and / or non-metallic elements and due to the pressure exerted on the melt by the conveying medium generated flows in the melt controlled mixed.
  • the resulting larger surface area and creation of new surfaces results in an increase in the diffusible amount of particles.
  • the surface solidification of the cast strand has already begun.
  • the porous surface makes it possible for atoms deposited at this point to diffuse from the medium (eg gases or vapors) from the surface into the solid material.
  • the admission of the band with gas or plasma jets can take place either at one of the two contact points or at both together both offset in time, and simultaneously.
  • the material or later component properties in the band can be set quasi precise location.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Metal Rolling (AREA)

Claims (8)

  1. Procédé de fabrication d'un feuillard d'acier laminé à chaud avec des caractéristiques de matériau réglables sur la largeur du feuillard, de l'acier liquide étant versé à l'aide d'un chenal de coulée sur un convoyeur de coulée périphérique d'une installation de coulée en bande horizontale et se solidifie en un préfeuillard d'une épaisseur comprise entre 6 et 20 mm et le préfeuillard étant soumis à un processus de laminage à chaud après la solidification complète,
    caractérisé en ce
    qu'un jet de gaz ou de plasma d'un élément métallique ou non métallique influençant les caractéristiques de matériau du feuillard laminé à chaud agit sur l'acier encore liquide et/ou en cours de début de solidification et par une modification de l'énergie cinétique du jet de gaz ou de plasma, de la pression partielle du gaz et/ou de la température contiguë, la concentration des éléments introduits dans la matière fondue via le jet de gaz ou de plasma et diffusant dans celle-ci est réglée sur l'épaisseur et la largeur du feuillard.
  2. Procédé selon la revendication 1, caractérisée en ce
    que des particules de matière solide sont ajoutées au jet de gaz ou de plasma.
  3. Procédé selon les revendications 1 et 2, caractérisé en ce
    que le gaz utilisé pour le jet de gaz est inerte et/ou réducteur.
  4. Procédé selon les revendications 1 et 2, caractérisé en ce
    que le gaz utilisé pour le jet de gaz est un mélange de gaz constitué d'un gaz inerte comme porteur et d'un gaz réducteur.
  5. Procédé suivant l'une des revendications 1 à 4, caractérisé en ce
    que le gaz est froid ou préchauffé.
  6. Procédé suivant l'une des revendications 1 à 5, caractérisé en ce
    que les caractéristiques de matériau sont réglées de manière symétrique ou asymétrique sur la largeur du feuillard.
  7. Procédé suivant l'une des revendications 1 à 6, caractérisé en ce
    que les caractéristiques de matériau sont en outre réglées de manière variable sur la longueur de coulée du feuillard.
  8. Procédé suivant l'une des revendications 1 à 7, caractérisé en ce
    que la forme des bords du feuillard est influencée dans le cadre de la solidification par l'action ciblée du jet de gaz ou de plasma sur les zones encore liquides du bord du convoyeur de coulée.
EP10749463.5A 2009-08-21 2010-07-14 Procédé de production de feuillards à chaud par coulée de bandes minces aux caractéristiques de matériau réglables sur la section transversale de la bande Not-in-force EP2467221B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009038974A DE102009038974B3 (de) 2009-08-21 2009-08-21 Verfahren zum Erzeugen von Warmband mittels Bandgießen mit über den Bandquerschnitt einstellbaren Werkstoffeigenschaften
PCT/DE2010/000826 WO2011020451A1 (fr) 2009-08-21 2010-07-14 Procédé de production de feuillards à chaud par coulée de bandes minces aux caractéristiques de matériau réglables sur la section transversale de la bande

Publications (2)

Publication Number Publication Date
EP2467221A1 EP2467221A1 (fr) 2012-06-27
EP2467221B1 true EP2467221B1 (fr) 2016-01-27

Family

ID=42993819

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10749463.5A Not-in-force EP2467221B1 (fr) 2009-08-21 2010-07-14 Procédé de production de feuillards à chaud par coulée de bandes minces aux caractéristiques de matériau réglables sur la section transversale de la bande

Country Status (6)

Country Link
US (1) US10086426B2 (fr)
EP (1) EP2467221B1 (fr)
KR (1) KR20120051028A (fr)
DE (1) DE102009038974B3 (fr)
RU (1) RU2537580C2 (fr)
WO (1) WO2011020451A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012002079B4 (de) 2012-01-30 2015-05-13 Salzgitter Flachstahl Gmbh Verfahren zur Herstellung eines kalt- oder warmgewalzten Stahlbandes aus einem höchstfesten Mehrphasenstahl
DE102012013425A1 (de) 2012-07-03 2014-01-09 Salzgitter Flachstahl Gmbh Kontinuierlich arbeitende Bandgieß- und Walzanlage
WO2021001495A1 (fr) 2019-07-03 2021-01-07 Hydro Aluminium Rolled Products Gmbh Acheminement de matière fondue pour installations de coulée en bande

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1112112A (fr) * 1977-05-31 1981-11-10 Alfred R.E. Singer Deposition de metaux sur un substrat
JPS58179542A (ja) * 1982-04-12 1983-10-20 Daido Steel Co Ltd 粒子分散金属の製造方法
US4523625A (en) * 1983-02-07 1985-06-18 Cornell Research Foundation, Inc. Method of making strips of metallic glasses having uniformly distributed embedded particulate matter
JPS6017029A (ja) * 1983-07-09 1985-01-28 Alps Electric Co Ltd 第２相粒子分散型超急冷合金の製造方法
US4588021A (en) * 1983-11-07 1986-05-13 Hazelett Strip-Casting Corporation Matrix coatings on endless flexible metallic belts for continuous casting machines method of forming such coatings and the coated belts
JPH01306052A (ja) * 1988-06-02 1989-12-11 Sumitomo Metal Ind Ltd 連続鋳造用ベルト
US6110296A (en) 1998-04-28 2000-08-29 Usx Corporation Thin strip casting of carbon steels
EP2233605B1 (fr) * 2000-12-12 2012-09-26 Konica Corporation Revêtement optique comprenant une couche anti-réflet
DE10124594B4 (de) * 2001-05-21 2006-10-12 Thyssenkrupp Steel Ag Verfahren zum Herstellen eines Verbundbandes aus Stahl durch Walzplattieren eines direkt gegossenen Stahlbandes sowie Verwendung eines solchen Verbundbandes
RU2233346C1 (ru) * 2003-04-22 2004-07-27 Открытое акционерное общество "Всероссийский институт легких сплавов" Алюминиевый сплав для получения пеноалюминия и способ получения пеноалюминия из него
DE102004053620A1 (de) 2004-11-03 2006-05-04 Salzgitter Flachstahl Gmbh Hochfester, lufthärtender Stahl mit ausgezeichneten Umformeigenschaften
DE102004062636B4 (de) * 2004-12-21 2007-05-24 Salzgitter Flachstahl Gmbh Einrichtung zum horizontalen Bandgießen von Stahl
DE102005062854A1 (de) 2005-12-23 2007-07-05 Salzgitter Flachstahl Gmbh Verfahren und Einrichtung zum Erzeugen von metallischen Warmbändern insbesondere aus Leichtbaustahl
DE102007058222A1 (de) 2007-12-03 2009-06-04 Salzgitter Flachstahl Gmbh Stahl für hochfeste Bauteile aus Bändern, Blechen oder Rohren mit ausgezeichneter Umformbarkeit und besonderer Eignung für Hochtemperatur-Beschichtungsverfahren

Also Published As

Publication number Publication date
DE102009038974B3 (de) 2010-11-25
EP2467221A1 (fr) 2012-06-27
RU2012110590A (ru) 2013-09-27
KR20120051028A (ko) 2012-05-21
US20120279677A1 (en) 2012-11-08
US10086426B2 (en) 2018-10-02
WO2011020451A1 (fr) 2011-02-24
RU2537580C2 (ru) 2015-01-10

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