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
  • B22D11/07—Lubricating the moulds
• • 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
• • 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
  • B22D11/007—Continuous casting of metals, i.e. casting in indefinite lengths of composite ingots, i.e. two or more molten metals of different compositions being used to integrally cast the ingots
• • 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
  • 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
• • 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 a cast strip with over the band cross-section and the strip length adjustable material properties according to the preamble of claim 1 and a device for carrying out the method according to claim 1 eighth
• Vehicle components on the other hand, but also a passive safety of the passengers promoting behavior of the individual components with high static and dynamic stresses during operation and in the event of a crash.
• the primary material manufacturers try to meet these requirements by providing load-optimized sheets and strips of steel ⁇ e.g. B. Taylored welded or Taylored roiled blanks), which are optimized according to the expected loads plate thickness or consist of different solid materials.
• Such steel sheets and strips have comparatively high requirements in terms of strength, ductility, toughness, energy consumption, wear and their processability such as cold working, welding and / or
• a method for producing a composite strip of steel is known, for example, from DE 101 24 594 A1.
• Plating tape plated In a comparable method according to WO 02 / 45B85 A1, a reoxidation-preventing layer is applied on one or both sides during the passage through the rollers.
• Another disadvantage here is the sharp jump in the properties of the composite material due to the plating, which complicates the optimum adaptation of the properties over the strip thickness corresponding to the respective requirements. Furthermore, the properties can not be varied over the bandwidth.
• melt is fed from a feed system via a runner onto a revolving casting belt of a horizontal strip casting plant from a feed system.
• the abandoned melt solidifies to a pre-strip with a thickness in the range between
• high manganese content or high aluminum content lightweight steels can be produced in an ideal manner, which can be produced by conventional methods, such as continuous casting, difficult.
• the high proportion of alloying constituents having a specific gravity well below the specific gravity of iron provides a weight reduction advantageous to the automotive industry while maintaining the previous design construction.
• the object of the invention is to provide a method for producing a strip of steel by means of horizontal strip casting, with which over the strip cross section and the strip length the required material properties can be variably adjusted. Furthermore, a device for carrying out the method should be provided. This object is achieved starting from the preamble in conjunction with the characterizing features of claim 1.
• the method according to the invention is characterized in that, before the melt is applied to the casting belt, a coating mass consisting of a liquid or pasty carrier mass with additives introduced therein is applied to the side of the casting belt which comes into contact with the melt, dried before the melt is discharged, and then combined with the discontinuous melt material.
• the additives can be metallic or non-metallic elements with which the material properties (such as mechanical, corrosion and wear properties) can be influenced in a targeted manner.
• metallic oxides / nitrides / borides such as.
• aiuminium oxide, zirconium oxide or yttrium oxide, titanium nitrides and ceramic oxides which depending on the melting temperature either deposit on the surface of the resulting steel strip or are introduced by melting in the material.
• a drying unit which removes the liquid constituents from the coating mass prior to the application of the melt, so that only the additive of the coating mass is present on the casting belt surface.
• the coating of the casting belt should therefore take place at a point where the casting belt still has sufficient residual heat.
• Heat exchange between the melt and coating material are advantageously controlled so that the coating composition is completely or only partially melted, in the latter case, only the near-surface layer of the coating over
• molten portions of the coating material act quasi as a separation layer between the melt and casting belt, the heat dissipation of the melt to the casting belt and thus the solidification rate of the melt can be influenced over the thickness of this separation layer advantageous.
• the detachment of the tape can also by the separating function of the layer in the sense of a sizing, z. B. as oxidation protection can be improved. This separating layer then remains as a firmly adhering layer on the resulting steel strip.
• the Zuleg istsanteil based on the base material is variably adjusted by the different thickness of the applied coating composition during strip casting, so that by alloying a steel strip with different properties over the strip length is created and thus partially load-optimized steel bands or steel strip sections are produced can.
• the coating thickness can z. B. by blowing off or stripping the applied
• Coating mass or be adjusted variably by changing the viscosity.
• the coating composition z. B. applied in the manner on the casting belt that arranged in a below the casting belt and with the
• Coating mass are controlled by the pressure force and / or the peripheral speed of the application roller. If necessary, the job roll is to be designed separately driven by a motor.
• the material can be adjusted symmetrically or asymmetrically or flexibly over the width and length of the resulting steel strip according to the respective requirements.
• appropriate alloying agents an adaptation to the required strength, toughness, corrosion or wear properties is possible in many areas.
• oxides, nitrides or borides When oxides, nitrides or borides are added to the coating composition, they deposit on the surface of the resulting steel strip because of the higher melting point than steel and remain there as a firmly adhering layer which forms a separating layer between the casting belt and the melt.
• the surface properties z, B. can be adjusted in terms of corrosion, wear, electrical or magnetic properties in a wide range.
• the properties may additionally be influenced by the thickness of the deposited layer over the length and width of the cast strip.
• Another advantage of the coating of the casting belt is the significantly lower wear by mechanical and thermal stress of the casting belt, whereby the
• Strip casting process to produce a cast steel strip as a composite material with different adjustable property gradients in the strip transverse and longitudinal direction and thus to meet the requirements for site-specific material properties with respect to deformation, crash and wear behavior.
• the further processing of the steel strip produced according to the invention can then be carried out in a known manner to a hot or cold strip by rolling with optional application of a coating.
• the inventive method is basically suitable for the production of tapes made of a variety of metallic materials, especially for high-alloy lightweight steels with high Mn, Si and Al contents.
• the invention provides the following advantages:
• FIG. 1 shows a horizontal strip casting in a side view with a device according to the invention for applying a coating composition on a casting belt for selectively influencing the material properties of the resulting steel strip in the transverse and longitudinal direction.
• the device for applying the coating material 7 on the casting belt 2.
• the device consists of a
• the application roller is driven by frictional engagement with the casting belt 2 and thus distributes the coating mass 7 uniformly on the underside of the casting belt 2.
• the drying unit for complete drying of the coating mass before the melt is applied to the casting belt.
• the coating composition can either be completely melted and thus the molten steel is alloyed or a firmly adhering coating is formed on the steel strip.
• the heat transfer from the melt applied to the casting belt 2 to the coating compound 7 can be controlled so that the cast strand 5 or the resulting steel strip receives a coating 9, the thickness of which is adjustable over the strip length.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Metal Rolling (AREA)
• Continuous Casting (AREA)
• Application Of Or Painting With Fluid Materials (AREA)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

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• 2011
  • 2011-02-02 DE DE102011010040A patent/DE102011010040B3/de not_active Expired - Fee Related
• 2012
  • 2012-01-06 RU RU2013140435/02A patent/RU2593044C2/ru not_active IP Right Cessation
  • 2012-01-06 WO PCT/DE2012/000038 patent/WO2012103862A2/fr active Application Filing
  • 2012-01-06 KR KR1020137020237A patent/KR101794783B1/ko active IP Right Grant
  • 2012-01-06 US US13/983,232 patent/US9393615B2/en active Active
  • 2012-01-06 EP EP12724542.1A patent/EP2670544A2/fr not_active Withdrawn

Non-Patent Citations (2)

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