EP1042525A1 - Method for producing a strip-like metal composite by high temperature dip coating - Google Patents

Method for producing a strip-like metal composite by high temperature dip coating

Info

Publication number
EP1042525A1
EP1042525A1 EP98966569A EP98966569A EP1042525A1 EP 1042525 A1 EP1042525 A1 EP 1042525A1 EP 98966569 A EP98966569 A EP 98966569A EP 98966569 A EP98966569 A EP 98966569A EP 1042525 A1 EP1042525 A1 EP 1042525A1
Authority
EP
European Patent Office
Prior art keywords
carrier tape
carrier
medium
metallurgical vessel
temperature
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.)
Granted
Application number
EP98966569A
Other languages
German (de)
French (fr)
Other versions
EP1042525B1 (en
Inventor
Wolfgang Bleck
Rolf BÜNTEN
Frank Friedel
Oliver Picht
Wolfgang Reichelt
Wilhelm Schmitz
Dieter Senk
Paul Splinter
Ulrich Urlau
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
SMS Siemag AG
Original Assignee
ThyssenKrupp Stahl AG
SMS Demag AG
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 ThyssenKrupp Stahl AG, SMS Demag AG filed Critical ThyssenKrupp Stahl AG
Publication of EP1042525A1 publication Critical patent/EP1042525A1/en
Application granted granted Critical
Publication of EP1042525B1 publication Critical patent/EP1042525B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/002—Pretreatement
    • 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
    • C23C2/003—Apparatus
    • C23C2/0035—Means for continuously moving substrate through, into or out of the 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
    • C23C2/003—Apparatus
    • C23C2/0036—Crucibles
    • 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
    • C23C2/003—Apparatus
    • C23C2/0036—Crucibles
    • C23C2/00361—Crucibles characterised by structures including means for immersing or extracting the substrate through confining wall area
    • 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
    • C23C2/003—Apparatus
    • C23C2/0038—Apparatus characterised by the pre-treatment chambers located immediately upstream of the bath or occurring locally before the dipping process
    • 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
    • C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
    • 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
    • C23C2/50—Controlling or regulating the coating processes
    • C23C2/52—Controlling or regulating the coating processes with means for measuring or sensing
    • C23C2/522—Temperature of the 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
    • C23C2/50—Controlling or regulating the coating processes
    • C23C2/52—Controlling or regulating the coating processes with means for measuring or sensing
    • C23C2/524—Position of the substrate
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/923—Physical dimension
    • Y10S428/924—Composite
    • Y10S428/925—Relative dimension specified
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/923—Physical dimension
    • Y10S428/924—Composite
    • Y10S428/926—Thickness of individual layer specified
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/9335—Product by special process
    • Y10S428/939—Molten or fused coating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/9335—Product by special process
    • Y10S428/941—Solid state alloying, e.g. diffusion, to disappearance of an original layer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12458—All metal or with adjacent metals having composition, density, or hardness gradient
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12951—Fe-base component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12951—Fe-base component
    • Y10T428/12958—Next to Fe-base component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12951—Fe-base component
    • Y10T428/12972—Containing 0.01-1.7% carbon [i.e., steel]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12951—Fe-base component
    • Y10T428/12972—Containing 0.01-1.7% carbon [i.e., steel]
    • Y10T428/12979—Containing more than 10% nonferrous elements [e.g., high alloy, stainless]

Definitions

  • the invention relates to a method for producing a band-shaped metallic composite material by high-temperature dip coating of a metallic one
  • Carrier tape on the surface of which a thin layer of this support material is crystallized by solidification when the carrier tape is guided through a molten metallic support material, this being different from the material of the support tape, a device for carrying out the method and a product produced by this method.
  • EP 0 467 749 B1 discloses a process for dip-coating a strip consisting of ferritic, stainless steel with aluminum, in which the strip is heated in various steps in a non-oxidizing atmosphere at different temperatures until the strip is finally in a
  • Coating bath is immersed.
  • EP 0 397 952 B1 discloses a process for the continuous hot dip coating of stainless steel strip with aluminum, in which the strip is attached to a series of.
  • an argon-flushed housing In an argon-flushed housing
  • Magnetic current devices is passed, the tape is cleaned by an argon plasma discharge while heating to the temperature desired for the dip coating and the cleaned tape is immersed in a bath of molten aluminum.
  • DE 195 45 259 A1 discloses a method and a device for producing thin metal strands, in which a metal strip is guided vertically through a molten steel and thereby has a layer thickness of 20-2%. the starting metal band is crystallized. Depending on the thickness, the metal strip is preheated to a temperature between room temperature and a maximum of 900 ° C. This process is used to produce composite sheets in which one of the materials used is stainless steel, austenitic or ferritic steel.
  • the invention has set itself the goal of creating a method, a device and a product in which an intimate, error-free connection of the individual layers of the composite material consisting of different materials can be achieved with simple means.
  • the invention achieves this goal in that the carrier tape is preheated before being passed through the molten support material on its surface and pretreated by the addition or incorporation of chemical elements in such a way that during the passage through the support material between the pretreated surface of the carrier tape and the the surface of the shell of the carrier tape crystallizing through diffusion processes creates a binding area made of a gradient material, the liquidus temperature of which is at least in parts of this binding area below the liquidus temperature of the carrier tape material and the covering material.
  • a shock shell solidifies on the surface in a very short time due to the resulting undercooling and the good foreign bacterial conditions, which initially has no bond with the carrier tape.
  • Diffusion processes during and after the dipping process result in concentration courses in the binding area between the shell and the carrier tape, which cause local alloy formation with a defined chemical composition.
  • a gradient material with a changing chemical composition is created in the course of the binding area itself.
  • the local concentrations cause a lowering of the liquidus temperature (calculation according to Wensel and Roeser), which in parts of the Binding area is below the liquidus temperature of both the carrier tape and the support material.
  • the lowering of the liquidus temperature is usually accompanied by an even greater lowering of the solidus temperature. It is thus possible for liquid phase components to be present in the binding area, even though the carrier tape and overlay material are in the solid state.
  • the liquid phase components ensure welding between the base and the base material.
  • FIG. 4 There, the course of the local liquidus and solidus temperatures is shown schematically in a diagram, in which the temperature is plotted over the location coordinate.
  • T iiq and T SO ⁇ illustrates the existence of the liquid phase in the binding area, the base material (carrier tape) and support material being in the solid state.
  • the temperature cannot be selected so high that the carrier tape is melted in the molten bath or loses strength so severely that it breaks off during transport.
  • the core of the carrier tape can be kept at an appropriate temperature, while for the desired intimate connection the liquidus temperature can be lowered at least at the tape surface, in order to enable diffusion-supported mixing in the liquid.
  • various means are shown in the invention which support diffusion-borne alloy formation in the binding area.
  • These agents can already be added to the carrier tape, but they can also be applied to the tape as a support or alone from the outside, in that, according to the invention, to prepare its surface, the carrier tape is passed through a medium which contains the corresponding chemical elements which at least partially penetrate into the surface .
  • the medium can be a gas such as nitrogen, hydrogen, carbon monoxide, ammonia or carbon dioxide or, according to another feature of the invention, a liquid such as sulfuric acid, liquid ammonia or be liquid nitrogen. It is also possible that the medium is a solid such as a cyan salt, carbonate or blood lye salt.
  • the carrier tape consists of steel which has a carbon content> 20 ppm or a in the area of its surface
  • the transport speed of the carrier tape and / or its immersion depth or immersion length in the liquid support material is advantageously set in such a way that a minimum immersion time of 50 msec is maintained, the total immersion time being limited by the desired layer thickness and the one already described above Risk of melting of the carrier tape.
  • the carrier tape is a carbon-containing steel which is preheated at least on its surface to a temperature of T before > 900 ° C.
  • the support material is at best a high-alloy steel, in particular a chrome-alloy steel.
  • the device for producing a band-shaped metallic composite material according to the inventive method consisting of a metallurgical
  • Vessel for holding the liquid support material, through which the carrier tape can be guided in the preferably vertical passage direction by means of pairs of rollers arranged on the inlet and outlet sides, and a preheating device for the carrier tape upstream of the metallurgical vessel, wherein according to the invention the preheating device is arranged in the inlet area in front of the metallurgical vessel, the carrier tape enclosing the housing is arranged, into which the medium coming from a media supply can be introduced via at least one feed guided into the housing.
  • the shape of the vessel through which the carrier tape is guided can be chosen as desired. Plunge pools with deflection rollers or containers with a bottom passage for the carrier tape are used here, the latter carrying the carrier tape vertically through the pouring container.
  • the latter containers have so far Advantage that the immersion length and belt speed parameters can be maintained with great certainty depending on the belt temperature, since the bath height in the vessel can be adjusted particularly easily and in a manner appropriate to the operation
  • the carrier tape is introduced directly from a non-oxidizing environment into the molten bath.This can be done by an enclosure that partially protrudes into the melt or, in the case of a vessel with a bottom opening, by a direct attachment below the bottom of the vessel
  • a preheating device and a media supply, through which gas, preferably inert gas, is fed into the interior of the housing, are sufficient
  • blow nozzles are provided on the feed, through which the gaseous medium into the interior of the housing and / or on the Surface of the strap is inflatable, or it will be on the
  • Supply spray nozzles provided, through which the liquid medium, for example sulfuric acid, liquid ammonia or liquid nitrogen, can be sprayed onto the surface of the carrier belt
  • solids or neself-capable materials can also be used to lower the
  • Liquidus temperature of the carrier belt such as cyan salt, carbonate or blood-lye salt
  • the medium can also be designed as a reloadable solid and pressed against the surface of the carrier tape.
  • the solids are formed, for example, as a block that is pressed against the surface of the carrier tape under appropriate pressure.
  • measuring elements for detecting the melt temperature, the temperature and the speed of the carrier tape are used, which control at least one actuator for setting the speed of the carrier tape via a processor.
  • bath height is recorded and also made available to the computer for processing.
  • a very precise and safe bath height adjustment is e.g. realizable by a vacuum tank.
  • the carrier tape can be adjusted in particular by influencing the content of alloying elements such as C or other alloying elements at grain boundaries such as N that local liquidus temperature drops occur, with the result that the bonding layer has a tooth-like connecting line.
  • This toothing line positively reinforces the already existing intimate metallic connection.
  • FIG. 1 shows a metallurgical vessel with a bottom passage opening
  • Figure 2 shows a metallurgical vessel with gaseous or liquid
  • FIG. 3 shows a metallurgical vessel with supply of solid media
  • Figure 4 shows a schematic course of the local liquidus and solidus temperatures.
  • 1 denotes a metallurgical vessel in which a carrier tape 21 is guided into the melt S through a bottom passage 13.
  • a housing 61 is provided below the bottom of the metallurgical vessel 11, in which a preheating device 41 is arranged and into which a media feed 51 connected to a media supply 52 opens.
  • the carrier tape 21 is over the Feed roller pair 31 is guided through the bottom passage 13 into the metallurgical vessel 11, the coated carrier tape 22 is conveyed out and removed from the metallurgical vessel 11 via a pair of discharge rollers 32 provided at the mouth 12 of the metallurgical vessel 11.
  • the metallurgical vessel shown in FIG. 1 can also be designed differently, for example as a dip vessel, into which the carrier tape is introduced from above and, after being deflected, is removed upward around a roller arranged in the molten bath.
  • FIG. 2 shows a media feed 51 for gaseous or liquid media, which can be guided into the housing 61 with the aid of a media conveyor 54 coming from the media supply 52. Blower nozzles 53 are used when using gaseous media, and spray nozzles 55 are used with liquid media.
  • a burner 43 is provided as a preheating device, which can be arranged in the belt conveying direction behind the spray or blowing nozzles 53, 55 (right side of the sketch) or in front of these (left side of the sketch).
  • a sandblaster is indicated at 82, with which the blasting agent is applied to the surface of the carrier belt via blasting nozzles 84.
  • the blasting agent is removed from the container 85 and conveyed by a pump 86.
  • the upper opening 12 of the metallurgical vessel 11 is covered by a hood 63 which envelops the removal rollers 32 and a winding device 23.
  • the melt S is added to the metallurgical vessel in the region of the bottom with little flow, a vacuum distributor 77 being used, which is connected to a vacuum pump 78. Via a pan 71, the bottom opening 72 of which can be closed by a stopper 74, the melt is passed into a receptacle 76 of the vacuum distributor 77 by means of an immersion pouring tube 73.
  • a processor 94 is shown schematically as a measuring and control device, which is connected to temperature measuring elements 91 for detecting the melt temperature, temperature measuring elements 92 for detecting the temperature of the carrier tape 21, with measuring elements for detecting the speed 93 and for detecting the bath height 97 .
  • the processor 94 acts on the belt speed via the actuators 95 and on the stopper 74 via an actuator 96 and thus essentially on the bath height of the melt S located in the metallurgical vessel 11.
  • FIG. 3 shows a further metallurgical vessel 11 with a bottom passage 13 through which a carrier tape 21 is guided.
  • a housing 61 is arranged outside the bottom area of the metallurgical vessel 11, in which a preheating device in the form of a burner 43 or an inductive heater 42 is arranged.
  • the interior 62 of the housing 61 is connected via a media feed 51 to a media supply 52.1 for gaseous media.
  • the interior 62 is separated from a media supply for solids by a horizontal partition wall 64 serving as heat protection with respect to the bottom area of the metallurgical vessel 11.
  • a horizontal partition wall 64 serving as heat protection with respect to the bottom area of the metallurgical vessel 11.
  • a channel 57 which is connected via a screw 59 to a container 56 in which free-flowing materials are located.
  • solid bodies B are used, which can be pressed against the surface of the carrier tape 21 via a media supply 52.2.
  • the upper opening 12 of the metallurgical vessel 11 is covered, as in the example according to FIG. 2, by the hood 63, which is connected to an inert gas supply 58.
  • the hood 63 has dimensions that cover the transport path of the coated carrier tape 22 over a predeterminable distance. Outside the hood 63, a roll stand 33 is indicated schematically, with which hot forming can be carried out.
  • the material supply in FIG. 3 is carried out via a pan 71.
  • the pan 71 has a bottom opening 72 at which an immersion pouring tube 73 which can be closed by a slide 75 and is immersed in the melt S is arranged.

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Abstract

The invention relates to a method and a device for producing a strip-like metal composite by high temperature dip coating a metallic carried band, consisting of a metallurgical tank for receiving the liquid coating material, through which the carrier band is guided, preferably in vertical direction, by a pair of rollers arranged at the inlet and at the outlet, in addition to a preheating device for the carrier band connected upstream from the metallurgical tank. The preheating device (41) is arranged in a housing (61) encompassing the carrier band (21) and mounted in front of the metallurgical tank in the inlet area. The medium supplied by a medium feeding device (52) can be introduced via at least one admission (51) leading to the inside of the housing.

Description

Verfahren zur Herstellung eines bandförmigen metallischen Verbundwerkstoffes durch Hochtemperatur-TauchbeschichtenProcess for producing a band-shaped metallic composite material by high-temperature dip coating
Beschreibungdescription
Die Erfindung betrifft ein Verfahren zur Herstellung eines bandförmigen metallischen Verbundwerkstoffes durch Hochtemperatur-Tauchbeschichten eines metallischenThe invention relates to a method for producing a band-shaped metallic composite material by high-temperature dip coating of a metallic one
Trägerbandes, auf dessen Oberfläche beim Führen des Trägerbandes durch einen geschmolzenen metallischen Auflagewerkstoff eine dünne Schicht dieses Auflagewerkstoffes durch Erstarren aufkristallisiert wird, wobei dieser von dem Werkstoff des Trägerbandes verschieden ist, eine Einrichtung zur Durchführung des Verfahrens sowie ein nach diesem Verfahren hergestelltes Erzeugnis.Carrier tape, on the surface of which a thin layer of this support material is crystallized by solidification when the carrier tape is guided through a molten metallic support material, this being different from the material of the support tape, a device for carrying out the method and a product produced by this method.
Aus der EP 0 467 749 B1 ist ein Verfahren zur Tauchbeschichtung eines aus ferritischem, rostfreiem Stahl bestehenden Bandes mit Aluminium bekannt, bei dem das Band in verschiedenen Schritten in nicht oxidierender Atmosphäre bei verschiedenen Temperaturen erwärmt wird, bis das Band schließlich in einEP 0 467 749 B1 discloses a process for dip-coating a strip consisting of ferritic, stainless steel with aluminum, in which the strip is heated in various steps in a non-oxidizing atmosphere at different temperatures until the strip is finally in a
Beschichtungsbad eingetaucht wird.Coating bath is immersed.
Weiterhin ist aus der EP 0 397 952 B1 ein Verfahren zum kontinuierlichen heißen Tauchbeschichten von rostfreiem Stahlband mit Aluminium bekannt, bei dem das Band in einem argongespülten Gehäuse an einer Reihe vonFurthermore, EP 0 397 952 B1 discloses a process for the continuous hot dip coating of stainless steel strip with aluminum, in which the strip is attached to a series of. In an argon-flushed housing
Magnetstromvorrichtungen vorbeigeführt wird, das Band durch eine Argonplasmatronenentladung bei gleichzeitigem Erhitzen auf die für die Tauchbeschichtung gewünschte Temperatur gereinigt wird und das gereinigte Band in ein Bad aus geschmolzenem Aluminium eingetaucht wird.Magnetic current devices is passed, the tape is cleaned by an argon plasma discharge while heating to the temperature desired for the dip coating and the cleaned tape is immersed in a bath of molten aluminum.
In den beiden oben genannten Verfahren wird also Aluminium mit Stahl verbunden.In the two processes mentioned above, aluminum is connected to steel.
Weiterhin ist aus der DE 195 45 259 A1 ein Verfahren und eine Vorrichtung zum Erzeugen von dünnen Metallsträngen bekannt, bei dem ein Metallband senkrecht durch eine Stahlschmelze geführt wird und ihm dabei eine Schichtdicke von 20 - 2 % des Ausgangsmetallbandes aufkristallisiert wird. Je nach Dicke wird das Metallband auf eine Temperatur zwischen Raumtemperatur und maximal 900°C vorgewärmt. Mit diesem Verfahren werden Verbundbleche hergestellt, bei denen einer der verwendeten Werkstoffe ein nicht rostender Stahl, ein austenitischer oder ferritischer Stahl ist.Furthermore, DE 195 45 259 A1 discloses a method and a device for producing thin metal strands, in which a metal strip is guided vertically through a molten steel and thereby has a layer thickness of 20-2%. the starting metal band is crystallized. Depending on the thickness, the metal strip is preheated to a temperature between room temperature and a maximum of 900 ° C. This process is used to produce composite sheets in which one of the materials used is stainless steel, austenitic or ferritic steel.
Genauere Untersuchungen zeigen, daß bei den bisher bekannt gewordenen Verfahren nicht die erhofften, sicher reproduzierbaren Ergebnisse der Verbindung zwischen Mutterblech und Beschichtung erreicht werden.More detailed investigations show that the previously known methods do not achieve the hoped-for, reproducible results of the connection between the mother plate and the coating.
Die Erfindung hat sich das Ziel gesetzt, ein Verfahren, eine Einrichtung sowie ein Erzeugnis zu schaffen, bei denen mit einfachen Mitteln eine innige, fehlerfreie Verbindung der einzelnen Schichten des aus unterschiedlichen Materialien bestehenden Verbundwerkstoffes erreichbar sind.The invention has set itself the goal of creating a method, a device and a product in which an intimate, error-free connection of the individual layers of the composite material consisting of different materials can be achieved with simple means.
Die Erfindung erreicht dieses Ziel dadurch, daß das Trägerband vor dem Führen durch den geschmolzenen Auflagewerkstoff an seiner Oberfläche vorgewärmt und derart durch An- oder Einlagerung von chemischen Elementen vorbehandelt wird, daß während der Führens durch den Auflagewerkstoff zwischen der vorbehandelten Oberfläche des Trägerbandes und der an der Oberfläche des Trägerbandes kristallisierenden Schale durch Diffusionsvorgänge ein Bindebereich aus einem Gradientenwerkstoff entsteht, dessen Liquidustemperatur mindestens in Teilen dieses Bindebereichs unterhalb der Liquidustemperatur des Trägerband- und des Auflagenwerkstoffes liegt.The invention achieves this goal in that the carrier tape is preheated before being passed through the molten support material on its surface and pretreated by the addition or incorporation of chemical elements in such a way that during the passage through the support material between the pretreated surface of the carrier tape and the the surface of the shell of the carrier tape crystallizing through diffusion processes creates a binding area made of a gradient material, the liquidus temperature of which is at least in parts of this binding area below the liquidus temperature of the carrier tape material and the covering material.
Nach dem Eintauchen des Trägerbandes in die Metallschmelze erstarrt an der Oberfläche aufgrund der sich einstellenden Unterkühlung sowie der guten Fremdkeimverhältnisse innerhalb kürzester Zeit eine Schreckschale, die zunächst noch keinen Verbund mit dem Trägerband hat. Durch Diffusionsvorgänge während und nach dem Tauchvorgang stellen sich im Bindebereich zwischen Schale und Trägerband Konzentrationsverläufe ein, die eine lokale Legierungsbildung mit definierter chemischer Zusammensetzung bewirken. Im Verlauf des Bindebereiches selbst entsteht ein Gradientenwerkstoff mit sich ändernder chemischer Zusammensetzung. Die lokalen Konzentrationen bewirken eine Absenkung der Liquidustemperatur (Berechnung nach Wensel und Roeser), die in Teilen des Bindebereiches unterhalb der Liquidustemperatur sowohl des Trägerbandes als auch des Auflagewerkstoffes liegt. Mit der Senkung der Liquidustemperatur geht meist eine noch stärkere Senkung der Solidustemperatur einher. Somit ist es möglich, daß im Bindebereich Flüssigphasenanteile vorliegen, obwohl der Trägerband- und Auflagenwerkstoff im festen Aggregatzustand vorliegen. Die Flüssigphasenanteile stellen eine Verschweißung zwischen Grund- und Auflagenwerkstoff sicher.After immersing the carrier tape in the molten metal, a shock shell solidifies on the surface in a very short time due to the resulting undercooling and the good foreign bacterial conditions, which initially has no bond with the carrier tape. Diffusion processes during and after the dipping process result in concentration courses in the binding area between the shell and the carrier tape, which cause local alloy formation with a defined chemical composition. A gradient material with a changing chemical composition is created in the course of the binding area itself. The local concentrations cause a lowering of the liquidus temperature (calculation according to Wensel and Roeser), which in parts of the Binding area is below the liquidus temperature of both the carrier tape and the support material. The lowering of the liquidus temperature is usually accompanied by an even greater lowering of the solidus temperature. It is thus possible for liquid phase components to be present in the binding area, even though the carrier tape and overlay material are in the solid state. The liquid phase components ensure welding between the base and the base material.
Die vorstehend beschriebenen Vorgänge sind in Figur 4 anschaulich gemacht. Dort ist der Verlauf der lokalen Liquidus- und Solidustemperaturen schematisch in einem Diagramm dargestellt, in dem die Temperatur über der Ortskoordinate aufgetragen ist.The processes described above are illustrated in FIG. 4. There, the course of the local liquidus and solidus temperatures is shown schematically in a diagram, in which the temperature is plotted over the location coordinate.
Der Verlauf der Temperaturen Tiiq und TSOι veranschaulicht die Flüssigphasenexistenz im Bindebereich, wobei Grundwerkstoff (Trägerband) und Auflagewerkstoff im festen Aggregatzustand vorliegen.The course of the temperatures T iiq and T SO ι illustrates the existence of the liquid phase in the binding area, the base material (carrier tape) and support material being in the solid state.
Es ist darauf zu achten, daß das Trägerband zwecks sicherer Verbindung nicht zu kalt ist, andererseits kann die Temperatur nicht so hoch gewählt werden, daß das Trägerband im Schmelzbad aufgeschmolzen wird oder so stark an Festigkeit verliert, daß es während des Transportes abreißt. Überraschenderweise wurde herausgefunden, daß der Kern des Trägerbandes auf einer angemessenen Temperatur gehalten werden kann, während für die gewünschte innige Verbindung die Liquidus-Temperatur mindestens an der Bandoberfläche abgesenkt werden kann, um somit eine diffusionsgetragene Vermischung im Flüssigen zu ermöglichen.Care must be taken to ensure that the carrier tape is not too cold for a secure connection; on the other hand, the temperature cannot be selected so high that the carrier tape is melted in the molten bath or loses strength so severely that it breaks off during transport. Surprisingly, it was found that the core of the carrier tape can be kept at an appropriate temperature, while for the desired intimate connection the liquidus temperature can be lowered at least at the tape surface, in order to enable diffusion-supported mixing in the liquid.
In vorteilhaften Weiterbildungen werden in der Erfindung verschiedene Mittel aufgezeigt, die eine diffusionsgetragene Legierungsbildung im Bindebereich unterstützen. Diese Mittel können dem Trägerband bereits mitgegeben werden, sie können aber auch unterstützend oder alleine von außen auf das Band aufgebracht werden, indem das Trägerband erfindungsgemäß zur Vorbereitung seiner Oberfläche durch ein Medium geführt wird, das die mindestens teilweise in die Oberfläche eindringenden entsprechenden chemischen Elemente enthält.In advantageous developments, various means are shown in the invention which support diffusion-borne alloy formation in the binding area. These agents can already be added to the carrier tape, but they can also be applied to the tape as a support or alone from the outside, in that, according to the invention, to prepare its surface, the carrier tape is passed through a medium which contains the corresponding chemical elements which at least partially penetrate into the surface .
Dabei kann nach einem Merkmal der Erfindung das Medium ein Gas wie Stickstoff, Wasserstoff, Kohienmonoxid, Ammoniak oder Kohlendioxid oder nach einem anderen Merkmal der Erfindung eine Flüssigkeit wie Schwefelsäure, flüssiger Ammoniak oder flüssiger Stickstoff sein. Auch ist es möglich, daß das Medium ein Feststoff wie ein Zyansalz, Karbonat oder Blutlaugensalz ist.According to one feature of the invention, the medium can be a gas such as nitrogen, hydrogen, carbon monoxide, ammonia or carbon dioxide or, according to another feature of the invention, a liquid such as sulfuric acid, liquid ammonia or be liquid nitrogen. It is also possible that the medium is a solid such as a cyan salt, carbonate or blood lye salt.
Nach einem günstigen Merkmal der Erfindung besteht das Trägerband aus Stahl, der im Bereich seiner Oberfläche einen Kohlenstoffgehait > 20 ppm oder einenAccording to a favorable feature of the invention, the carrier tape consists of steel which has a carbon content> 20 ppm or a in the area of its surface
Stickstoffgehalt > 20 ppm aufweist.Has nitrogen content> 20 ppm.
Vorteilhafterweise wird die Transportgeschwindigkeit des Trägerbandes und/oder seine Eintauchtiefe bzw. Eintauchlänge in den flüssigen Auflagewerkstoff in einer solchen Weise eingestellt, daß eine Mindesttauchzeit von 50 msec eingehalten wird, wobei die Gesamttauchzeit nach oben hin begrenzt wird durch die gewünschte Schichtdicke und die oben bereits beschriebene Aufschmelzgefahr des Trägerbandes.The transport speed of the carrier tape and / or its immersion depth or immersion length in the liquid support material is advantageously set in such a way that a minimum immersion time of 50 msec is maintained, the total immersion time being limited by the desired layer thickness and the one already described above Risk of melting of the carrier tape.
Nach einem weiteren Ausgestaltungsmerkmal des erfindungsgemäßen Verfahrens wird vorgeschlagen, die Oberfläche des Trägerbandes vor dem Eintauchen in den flüssigen Auflagewerkstoff aufzurauhen.According to a further design feature of the method according to the invention, it is proposed to roughen the surface of the carrier tape before immersing it in the liquid support material.
In einer bevorzugten Auswahl der möglichen Verfahrensschritte ist vorgesehen, daß das Trägerband ein kohlenstoffhaltiger Stahl ist, der mindestens an seiner Oberfläche auf eine Temperatur von Tvor> 900°C vorgewärmt wird. Der Auflagewerkstoff ist günstigstenfalls ein hochlegierter Stahl, insbesondere ein chromlegierter Stahl.In a preferred selection of the possible process steps, it is provided that the carrier tape is a carbon-containing steel which is preheated at least on its surface to a temperature of T before > 900 ° C. The support material is at best a high-alloy steel, in particular a chrome-alloy steel.
Die Einrichtung zur Herstellung eines bandförmigen metallischen Verbundwerkstoffes nach dem erfindungsgemäßen Verfahren, bestehend aus einem metallurgischenThe device for producing a band-shaped metallic composite material according to the inventive method, consisting of a metallurgical
Gefäß zur Aufnahme des flüssigen Auflagewerkstoffes, durch den das Trägerband in vorzugsweise vertikaler Durchlaufrichtung mittels ein- und auslaufseitig angeordneter Rollenpaare führbar ist, sowie einer dem metallurgischen Gefäß vorgeschalteten Vorwärmeinrichtung für das Trägerband, wobei erfindungsgemäß die Vorwärmeinrichtung in einem im Einlaufbereich vor dem metallurgischen Gefäß angeordneten, das Trägerband umschließenden Gehäuse angeordnet ist, in das über mindestens eine in das Gehäuse geführte Zuführung das von einer Medienversorgung kommende Medium einleitbar ist. Die Form des Gefäßes, durch die das Tragerband gefuhrt wird, kann beliebig gewählt werden Zum Einsatz kommen hier Tauchbecken mit Umlenkrollen oder Behalter mit einem Bodendurchlaß für das Tragerband, wobei bei dem letzteren das Tragerband senkrecht durch den Gießbehalter gefuhrt wird Die letztgenannten Behalter haben insoweit den Vorteil, daß hier mit großer Sicherheit die Parameter Eintauchlange und Bandgeschwindigkeit in Abhängigkeit von der Bandtemperatur eingehalten werden können, da sich die Badhohe im Gefäß besonders einfach und betriebsgerecht einstellen laßtVessel for holding the liquid support material, through which the carrier tape can be guided in the preferably vertical passage direction by means of pairs of rollers arranged on the inlet and outlet sides, and a preheating device for the carrier tape upstream of the metallurgical vessel, wherein according to the invention the preheating device is arranged in the inlet area in front of the metallurgical vessel, the carrier tape enclosing the housing is arranged, into which the medium coming from a media supply can be introduced via at least one feed guided into the housing. The shape of the vessel through which the carrier tape is guided can be chosen as desired. Plunge pools with deflection rollers or containers with a bottom passage for the carrier tape are used here, the latter carrying the carrier tape vertically through the pouring container. The latter containers have so far Advantage that the immersion length and belt speed parameters can be maintained with great certainty depending on the belt temperature, since the bath height in the vessel can be adjusted particularly easily and in a manner appropriate to the operation
Bei einer besonders einfachen und kompakten Einrichtung zum Erzeugen vonWith a particularly simple and compact device for generating
Metallstrangen aus Verbundwerkstoff nach dem erfindungsgemaßen Verfahren wird das Tragerband unmittelbar aus einer nicht oxidierenden Umgebung in das Schmelzbad eingeführt Dies kann durch eine Einhausung geschehen, die zum Teil in die Schmelze hineinragt oder bei einem Gefäß mit Bodenoffnung durch eine direkte Anbringung unterhalb des Bodens des Gefäßes erfolgenMetal strands of composite material according to the inventive method, the carrier tape is introduced directly from a non-oxidizing environment into the molten bath.This can be done by an enclosure that partially protrudes into the melt or, in the case of a vessel with a bottom opening, by a direct attachment below the bottom of the vessel
Beim Einsatz eines Tragerbandes mit den bereits enthaltenen Legierungsbildnem reicht eine Vorwarmeinπchtung und eine Medienzufuhrung, durch die Gas, vorzugsweise Inertgas, in den Einhausungsinnenraum gefuhrt wird, ausWhen using a carrier tape with the alloying agents already contained, a preheating device and a media supply, through which gas, preferably inert gas, is fed into the interior of the housing, are sufficient
Soweit ergänzend feste bzw flussige Medien oder auch allein gasformige Medien wie Stickstoff, Wasserstoff, Kohienmonoxid oder Kohlendioxid auf die Oberflache des Tragerbandes gegeben werden, sind an der Zufuhrung entweder Blasedusen vorgesehen, durch die das gasformige Medium in den Innenraum der Einhausung und/oder auf die Oberflache des Tragerbandes aufblasbar ist, oder es werden an derInsofar as solid or liquid media or gaseous media such as nitrogen, hydrogen, carbon monoxide or carbon dioxide are added to the surface of the conveyor belt, either blow nozzles are provided on the feed, through which the gaseous medium into the interior of the housing and / or on the Surface of the strap is inflatable, or it will be on the
Zufuhrung Spruhdusen vorgesehen, durch die das flussige Medium, z B Schwefelsaure, flussiger Ammoniak oder auch flussiger Stickstoff, auf die Oberflache des Tragerbandes aufspruhbar istSupply spray nozzles provided, through which the liquid medium, for example sulfuric acid, liquid ammonia or liquid nitrogen, can be sprayed onto the surface of the carrier belt
Es können aber auch Feststoffe oder neselfahige Materialien zur Senkung derHowever, solids or neself-capable materials can also be used to lower the
Liquidus-Temperatur des Tragerbandes eingesetzt werden, wie Zyansalz, Karbonatoder Blutlaugensalz Beim Einsatz von πeselfahigen Materialien werden diese über Zufuhrung in eingebracht und mit der Oberflache des Tragerbandes in Kontakt gebracht, wobei das Band beim Vorbeifuhren an den Rinnen den Feststoff mitreißt Das Medium kann auch erfindungsgemäß als nachladbarer Festkörper ausgebildet und gegen die Oberfläche des Trägerbandes gepreßt werden. Die Feststoffe werden beispielsweise als Block geformt, der unter angemessenem Druck gegen die Oberfläche des Trägerbandes gedrückt wird.Liquidus temperature of the carrier belt, such as cyan salt, carbonate or blood-lye salt, are used. When using πeselfbare materials, these are introduced via the infeed and brought into contact with the surface of the carrier belt, the belt entraining the solid as it passes the channels According to the invention, the medium can also be designed as a reloadable solid and pressed against the surface of the carrier tape. The solids are formed, for example, as a block that is pressed against the surface of the carrier tape under appropriate pressure.
In einer weiteren vorteilhaften Ausgestaltung werden Meßelemente zum Erfassen der Schmelzentemperatur, der Temperatur sowie der Geschwindigkeit des Trägerbandes eingesetzt, die über einen Prozessor mindestens einen Aktuator zur Einstellung der Geschwindigkeit des Trägerbandes steuern.In a further advantageous embodiment, measuring elements for detecting the melt temperature, the temperature and the speed of the carrier tape are used, which control at least one actuator for setting the speed of the carrier tape via a processor.
Darüber hinaus wird noch die Badhöhe erfaßt und ebenfalls dem Rechner zur Verarbeitung bereit gestellt. Eine sehr genaue und sichere Badhöheneinstellung ist z.B. durch einen Unterdruckbehälter realisierbar.In addition, the bath height is recorded and also made available to the computer for processing. A very precise and safe bath height adjustment is e.g. realizable by a vacuum tank.
Das Trägerband kann insbesondere durch Einflußnahme auf den Gehalt von Legierungselementen, wie C oder auch anderen Legierungselementen an Korngrenzen wie N, so eingestellt werden, daß es zu lokalen Liquidus- Temperaturabsenkungen kommt mit der Folge, daß die Bindeschicht eine zahnähnliche Verbindungslinie aufweist. Diese Verzahnungslinie verstärkt formschlüssig die bereits vorhandene innige metallische Verbindung.The carrier tape can be adjusted in particular by influencing the content of alloying elements such as C or other alloying elements at grain boundaries such as N that local liquidus temperature drops occur, with the result that the bonding layer has a tooth-like connecting line. This toothing line positively reinforces the already existing intimate metallic connection.
Ein Beispiel der Erfindung ist in der beiliegenden Zeichnung dargelegt. Dabei zeigen dieAn example of the invention is set out in the accompanying drawing. The show
Figur 1 ein metallurgisches Gefäß mit Bodendurchlaßöffnung,FIG. 1 shows a metallurgical vessel with a bottom passage opening,
Figur 2 ein metallurgisches Gefäß mit gasförmiger oder flüssigerFigure 2 shows a metallurgical vessel with gaseous or liquid
Medienzuführung und Figur 3 ein metallurgisches Gefäß mit Zuführung fester Medien undMedia supply and Figure 3 shows a metallurgical vessel with supply of solid media and
Figur 4 schematischer Verlauf der lokalen Liquidus- und Solidustemperaturen.Figure 4 shows a schematic course of the local liquidus and solidus temperatures.
In Figur 1 ist mit 1 ein metallurgisches Gefäß bezeichnet, bei dem ein Trägerband 21 durch einen Bodendurchtritt 13 in die Schmelze S geführt wird. Unterhalb des Bodens des metallurgischen Gefäßes 11 ist ein Gehäuse 61 vorgesehen, in dem eine Vorwärmeinrichtung 41 angeordnet ist und in das eine mit einer Medienversorgung 52 verbundene Medienzuführung 51 mündet. Das Trägerband 21 wird über das Zuführrollenpaar 31 durch den Bodendurchtritt 13 in das metallurgische Gefäß 11 geführt, das beschichtete Trägerband 22 wird über ein an der Mündung 12 des metallurgischen Gefäßes 11 vorgesehenes Abführollenpaar 32 aus dem metallurgischen Gefäß 11 herausgefördert und abgeführt.In FIG. 1, 1 denotes a metallurgical vessel in which a carrier tape 21 is guided into the melt S through a bottom passage 13. A housing 61 is provided below the bottom of the metallurgical vessel 11, in which a preheating device 41 is arranged and into which a media feed 51 connected to a media supply 52 opens. The carrier tape 21 is over the Feed roller pair 31 is guided through the bottom passage 13 into the metallurgical vessel 11, the coated carrier tape 22 is conveyed out and removed from the metallurgical vessel 11 via a pair of discharge rollers 32 provided at the mouth 12 of the metallurgical vessel 11.
Das in Figur 1 dargestellte metallurgische Gefäß kann auch anders gestaltet sein, beispielsweise als Tauchgefäß, in das das Trägerband von oben eingeführt und nach Umlenkung um eine in dem Schmelzbad angeordnete Rolle nach oben abgeführt wird.The metallurgical vessel shown in FIG. 1 can also be designed differently, for example as a dip vessel, into which the carrier tape is introduced from above and, after being deflected, is removed upward around a roller arranged in the molten bath.
In Figur 2 sind gleiche Teile gleich bezeichnet. Ergänzend zu den bereits erwähnten Elementen der Figur 1 zeigt die Figur 2 eine Medienzuführung 51 für gasförmige oder auch flüssige Medien, die mit Hilfe eines Medienförderers 54 von der Medienversorgung 52 kommend in das Gehäuse 61 leitbar sind. Bei der Verwendung von gasförmigen Medien kommen Blasedüsen 53 und bei flüssigen Medien Sprühdüsen 55 zum Einsatz.In FIG. 2, the same parts are labeled identically. In addition to the elements of FIG. 1 already mentioned, FIG. 2 shows a media feed 51 for gaseous or liquid media, which can be guided into the housing 61 with the aid of a media conveyor 54 coming from the media supply 52. Blower nozzles 53 are used when using gaseous media, and spray nozzles 55 are used with liquid media.
In der Figur 2 ist als Vorwärmeinrichtung ein Brenner 43 vorgesehen, der in Bandförderrichtung hinter den Sprüh- bzw. Blasedüsen 53, 55 (rechte Seite der Skizze) oder vor diesen (linke Seite der Skizze) angeordnet sein kann.In FIG. 2, a burner 43 is provided as a preheating device, which can be arranged in the belt conveying direction behind the spray or blowing nozzles 53, 55 (right side of the sketch) or in front of these (left side of the sketch).
In der Figur 2 ist bei 82 ein Sandstrahler angedeutet, mit dem das Strahlmittel über Strahldüsen 84 auf die Oberfläche des Trägerbandes aufgegeben wird. Das Strahlmittel wird dabei dem Behälter 85 entnommen und über eine Pumpe 86 gefördert.In FIG. 2, a sandblaster is indicated at 82, with which the blasting agent is applied to the surface of the carrier belt via blasting nozzles 84. The blasting agent is removed from the container 85 and conveyed by a pump 86.
Die obere Öffnung 12 des metallurgischen Gefäßes 11 ist durch eine Haube 63 abgedeckt, die die Abfuhrrollen 32 sowie eine Aufwickelvorrichtung 23 umhüllt.The upper opening 12 of the metallurgical vessel 11 is covered by a hood 63 which envelops the removal rollers 32 and a winding device 23.
Die Schmelze S wird dem metallurgischen Gefäß im Bereich des Bodens strömungsarm zugegeben, wobei ein Unterdruckverteiler 77 zum Einsatz kommt, der an eine Vakuumpumpe 78 angeschlossen ist. Über eine Pfanne 71 , deren Bodenöffnung 72 durch einen Stopfen 74 verschließbar ist, wird Schmelze mittels eines Tauchgießrohres 73 in ein Aufnahmegefäß 76 des Unterdruckverteilers 77 geleitet.The melt S is added to the metallurgical vessel in the region of the bottom with little flow, a vacuum distributor 77 being used, which is connected to a vacuum pump 78. Via a pan 71, the bottom opening 72 of which can be closed by a stopper 74, the melt is passed into a receptacle 76 of the vacuum distributor 77 by means of an immersion pouring tube 73.
In Figur 2 ist ein Prozessor 94 als Meß- und Regeleinrichtung schematisch dargestellt, der mit Temperaturmeßelementen 91 zur Erfassung der Schmelzentemperatur, Temperaturmeßelementen 92 zur Erfassung der Temperatur des Trägerbandes 21 , mit Meßelementen zur Erfassung der Geschwindigkeit 93 und zur Erfassung der Badhöhe 97, verbunden ist.In Figure 2, a processor 94 is shown schematically as a measuring and control device, which is connected to temperature measuring elements 91 for detecting the melt temperature, temperature measuring elements 92 for detecting the temperature of the carrier tape 21, with measuring elements for detecting the speed 93 and for detecting the bath height 97 .
Der Prozessor 94 wirkt über die Aktuatoren 95 auf die Bandgeschwindigkeit und über einen Aktuator 96 auf den Stopfen 74 und somit wesentlich auf die Badhöhe der im metallurgischen Gefäß 11 befindlichen Schmelze S.The processor 94 acts on the belt speed via the actuators 95 and on the stopper 74 via an actuator 96 and thus essentially on the bath height of the melt S located in the metallurgical vessel 11.
Die Figur 3 zeigt ein weiteres metallurgisches Gefäß 11 mit Bodendurchlaß 13, durch das ein Trägerband 21 geführt wird. Außerhalb des Bodenbereichs des metallurgischen Gefäßes 11 ist eine Einhausung 61 angeordnet, in der eine Vorwärmeinrichtung in Form eines Brenners 43 bzw. einer induktiven Heizung 42 angeordnet ist. Der Innenraum 62 der Einhausung 61 ist über eine Medienzuführung 51 mit einer Medienversorgung 52.1 für gasförmige Medien verbunden.FIG. 3 shows a further metallurgical vessel 11 with a bottom passage 13 through which a carrier tape 21 is guided. A housing 61 is arranged outside the bottom area of the metallurgical vessel 11, in which a preheating device in the form of a burner 43 or an inductive heater 42 is arranged. The interior 62 of the housing 61 is connected via a media feed 51 to a media supply 52.1 for gaseous media.
Weiterhin ist der Innenraum 62 durch eine als Hitzeschutz gegenüber dem Bodenbereich des metallurgischen Gefäßes 1 1 dienende waagerechte Trennwand 64 von einer Medienzuführung für Feststoffe getrennt. Rechts vom Trägerband 21 ist eine Rinne 57 vorgesehen, die über eine Schnecke 59 mit einem Behälter 56 verbunden ist, in dem sich rieselfähige Werkstoffe befinden.Furthermore, the interior 62 is separated from a media supply for solids by a horizontal partition wall 64 serving as heat protection with respect to the bottom area of the metallurgical vessel 11. To the right of the carrier tape 21 is a channel 57 which is connected via a screw 59 to a container 56 in which free-flowing materials are located.
Links vom Trägerband 21 kommen Festkörper B zum Einsatz, die über eine Medienversorgung 52.2 gegen die Oberfläche des Trägerbandes 21 anpreßbar sind.To the left of the carrier tape 21, solid bodies B are used, which can be pressed against the surface of the carrier tape 21 via a media supply 52.2.
Die obere Öffnung 12 des metallurgischen Gefäßes 11 ist wie im Beispiel nach Fig.2 durch die Haube 63, welche mit einer Inertgasversorgung 58 in Verbindung steht, abgedeckt. Die Haube 63 weist Abmessungen auf, die den Transportweg des beschichteten Trägerbandes 22 über eine vorgebbare Strecke abdecken. Außerhalb der Haube 63 ist ein Walzgerüst 33 schematisch angedeutet, mit dem eine Warmumformung durchführbar ist.The upper opening 12 of the metallurgical vessel 11 is covered, as in the example according to FIG. 2, by the hood 63, which is connected to an inert gas supply 58. The hood 63 has dimensions that cover the transport path of the coated carrier tape 22 over a predeterminable distance. Outside the hood 63, a roll stand 33 is indicated schematically, with which hot forming can be carried out.
Die Materialzufuhr in der Figur 3 wird über eine Pfanne 71 durchgeführt. Die Pfanne 71 weist dabei eine Bodenöffnung 72 auf, an der ein durch einen Schieber 75 verschließbares Tauchgießrohr 73 angeordnet ist, welches in die Schmelze S eintaucht. The material supply in FIG. 3 is carried out via a pan 71. The pan 71 has a bottom opening 72 at which an immersion pouring tube 73 which can be closed by a slide 75 and is immersed in the melt S is arranged.
PositionslistePosition list
SchmelzbadWeld pool
11. Metallurgisches Gefäß 12 obere Öffnung11. Metallurgical vessel 12 upper opening
13 Bodendurchtritt13 floor passage
TrägerbandCarrier tape
21 Trägerband 22 Beschichtetes Trägerband21 Carrier tape 22 Coated carrier tape
23 Aufwickelvorrichtung23 take-up device
ZusatzeinrichtungAdditional device
31 Rollenpaar Zufuhr 32 Rollenpaar Abfuhr31 roller pair feed 32 roller pair discharge
33 Walzgerüst33 roll stand
41 Vorwärmeinrichtung41 preheater
42 Induktive Erwärmung42 Induction heating
43 Brenner43 burners
Medienmedia
51 Medienzuführung51 Media feeder
52. Medienversorgung52. Media supply
52.1 Medienversorgung für gasförmige Medien52.1 Media supply for gaseous media
52.2 Medienversorgung für Feststoffe52.2 Media supply for solids
53 Blasedüsen53 blowing nozzles
54 Medienförderer54 media sponsors
55 Sprühdüsen 56 Behälter55 spray nozzles 56 containers
57 Rinne57 gutter
58 Gasversorgung 59 Schnecke58 Gas supply 59 snail
Abdeckungcover
61 Einhausung61 housing
62 Innenraum62 interior
63 Haube63 hood
64 Trennwand64 partition
MaterialzufuhrMaterial supply
71 Pfanne71 pan
72 Bodenöffnung 73 Tauchgießrohr 74 Stopfen 75 Schieber72 Bottom opening 73 Immersion nozzle 74 Plug 75 Slide
76 Aufnahmegefäß 77 Unterdruckverteiler76 receptacle 77 vacuum distributor
78 Vakuumpumpe Aufrauhen78 vacuum pump Roughen
81 Aufrauhbauteil81 roughening component
82 Sandstrahler82 sandblaster
83 Bürste83 brush
84 Strahldüsen84 jet nozzles
85 Behälter85 containers
86 Pumpe86 pump
Meß - und RegeleinrichtungMeasuring and control device
91 Temperatur Schmelze91 melt temperature
92 Temperatur Trägerband92 temperature carrier tape
93 Geschwindigkeit93 speed
94 Prozessor94 processor
95 Aktuator Geschwindigkeit95 actuator speed
96 Aktuator Stopfen96 actuator plug
97 Meßeinrichtung Schmelzbadhöhe97 Melting bath height measuring device
S SchmelzeS melt
B FestkörperB solid
R Rieselfähiges Material R Free-flowing material

Claims

Patentansprücheclaims
1 Verfahren zur Herstellung eines bandförmigen metallischen Verbundwerkstoffes durch Hochtemperatur-Tauchbeschichten eines metallischen Tragerbandes, auf dessen Oberflache beim Fuhren des Tragerbandes durch einen geschmolzenen metallischen Auflagewerkstoff eine dünne Schicht dieses Auflagewerkstoffes durch Erstarrung aufkπstallisiert wird, wobei dieser von dem Werkstoff des Tragerbandes verschieden ist, dadurch gekennzeichnet, daß das Tragerband vor dem Fuhren durch den geschmolzenen1 Method for producing a band-shaped metallic composite material by high-temperature dip coating of a metallic carrier tape, on the surface of which a thin layer of this supporting material is installed by solidification when the carrier tape is guided through a molten metallic supporting material, this being different from the material of the supporting tape, characterized that the carrier tape before passing through the melted
Auflagewerkstoff an seiner Oberflache vorgewärmt und derart durch An- oder Einlagerung von chemischen Elementen vorbehandelt wird, daß wahrend der Fuhrens durch den Auflagewerkstoff zwischen der vorbehandelten Oberflache des Tragerbandes und der an der Oberflache des Tragerbandes kristallisierenden Schale durch Diffusionsvorgange ein Bindebereich aus einemThe support material is preheated on its surface and pretreated by the addition or incorporation of chemical elements in such a way that a diffusion process results in a binding area from one during the passage through the support material between the pretreated surface of the carrier tape and the shell crystallizing on the surface of the carrier tape
Gradientenwerkstoff entsteht, dessen Liquidustemperatur mindestens in Teilen dieses Bindebereichs unterhalb der Liquidustemperatur des Tragerband- und des Auflagenwerkstoffes liegtGradient material is formed, the liquidus temperature of which is at least in parts of this binding area below the liquidus temperature of the carrier tape and the support material
2 Verfahren nach Anspruch 1 , dadurch gekennzeichnet, daß das Tragerband zur Vorbereitung seiner Oberflache durch ein Medium gefuhrt wird, das die mindestens teilweise in die Oberflache eindringenden entsprechenden chemischen Elemente enthalt2 The method according to claim 1, characterized in that the carrier tape is guided to prepare its surface through a medium containing the at least partially penetrating into the surface corresponding chemical elements
Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß das Medium ein Gas wie Stickstoff, Wasserstoff, Kohienmonoxid,A method according to claim 2, characterized in that the medium is a gas such as nitrogen, hydrogen, carbon monoxide,
Ammoniak oder Kohlendioxid istIs ammonia or carbon dioxide
Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß das Medium eine Flüssigkeit wie Schwefelsaure, flussiger Ammoniak oder flussiger Stickstoff ist A method according to claim 2, characterized in that the medium is a liquid such as sulfuric acid, liquid ammonia or liquid nitrogen
5. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß das Medium ein Feststoff wie ein Zyansalz, Karbonat oder Blutlaugensalz ist.5. The method according to claim 2, characterized in that the medium is a solid such as a cyan salt, carbonate or blood lye salt.
6. Verfahren nach Anspruch 1. dadurch gekennzeichnet, daß das Trägerband aus Stahl besteht, der im Bereich seiner Oberfläche einen Kohlenstoffgehalt > 20 ppm aufweist.6. The method according to claim 1, characterized in that the carrier tape consists of steel which has a carbon content> 20 ppm in the region of its surface.
7. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, daß das Trägerband aus Stahl besteht, der im Bereich seiner Oberfläche einen Stickstoffgehalt > 20 ppm aufweist.7. The method according to claim 1, characterized in that the carrier tape consists of steel which has a nitrogen content> 20 ppm in the region of its surface.
8. Verfahren nach einem der Ansprüche 2-5, dadurch gekennzeichnet, daß die Transportgeschwindigkeit des Trägerbandes und/oder seine Eintauchtiefe in den flüssigen Auflagewerkstoff in einer Weise eingestellt werden, daß eine Mindesttauchzeit von 50 msec eingehalten wird.8. The method according to any one of claims 2-5, characterized in that the transport speed of the carrier tape and / or its immersion depth in the liquid support material are set in such a way that a minimum immersion time of 50 msec is maintained.
9. Verfahren nach mindestens einem der o. g. Ansprüche, dadurch gekennzeichnet, daß die Oberfläche des Trägerbandes vor dem Eintauchen in den flüssigen Auflagewerkstoff aufgerauht wird.9. Procedure according to at least one of the above. Claims, characterized in that the surface of the carrier tape is roughened before being immersed in the liquid support material.
10. Verfahren nach mindestens einem der o. g. Ansprüche, dadurch gekennzeichnet, daß Trägerband ein kohlenstoffhaltiger Stahl ist, der mindestens an seiner Oberfläche auf eine Temperatur von Tvor > 900°C vorgewärmt wird. 10. The method according to at least one of the above claims, characterized in that the carrier tape is a carbon-containing steel which is preheated at least on its surface to a temperature of T before > 900 ° C.
11. Verfahren nach mindestens einem der o. g. Ansprüche, dadurch gekennzeichnet, daß der Auflagewerkstoff ein hochlegierter Stahl, insbesondere ein chromlegierter Stahl ist.11. Procedure according to at least one of the above. Claims, characterized in that the support material is a high-alloy steel, in particular a chrome-alloy steel.
12 Einrichtung zur Herstellung eines bandförmigen metallischen Verbundwerkstoffes durch Hochtemperatur-Tauchbeschichten eines metallenen Trägerbandes nach dem in den Patentansprüchen 1 bis 11 beschriebenen Verfahren, bestehend aus einem metallurgischen Gefäß zur Aufnahme des flüssigen Auflagewerkstoffes, durch den das Trägerband in vorzugsweise vertikaler Durchlaufrichtung mittels ein- und auslaufseitig angeordneten Rollenpaaren führbar ist, sowie einer dem metallurgischen Gefäß vorgeschalteten Vorwärmeinrichtung für das Trägerband, dadurch gekennzeichnet, daß die Vorwärmeinrichtung (41) in einem im Einlaufbereich vor dem metallurgischen Gefäß (11) angeordneten, das Trägerband (21) umschließenden Gehäuse (61) angeordnet ist, in das über mindestens eine in das Gehäuse geführte Zuführung (51) das von einer Medienversorgung (52) kommende Medium einleitbar ist.12 Device for producing a band-shaped metallic composite material by high-temperature dip coating of a metal carrier tape according to the method described in claims 1 to 11, consisting of a metallurgical vessel for receiving the liquid support material, through which the carrier tape in the preferably vertical direction by means of the inlet and outlet sides arranged pairs of rollers can be guided, and a preheating device for the carrier tape upstream of the metallurgical vessel, characterized in that the preheating device (41) is arranged in a housing (61) surrounding the carrier tape (21) in the inlet area in front of the metallurgical vessel (11) , into which the medium coming from a media supply (52) can be introduced via at least one feed (51) guided into the housing.
13 Einrichtung nach Anspruch 12, dadurch gekennzeichnet, daß an der Zuführung (51) Blasedüsen (53) vorgesehen sind, durch die das gasförmige Medium in den Innenraum (62) der Einhausung (61) und/oder auf die Oberfläche des Trägerbandes (21) aufblasbar sind.13 Device according to claim 12, characterized in that on the feed (51) blow nozzles (53) are provided through which the gaseous medium in the interior (62) of the housing (61) and / or on the surface of the carrier tape (21) are inflatable.
14. Einrichtung nach Anspruch 12, dadurch gekennzeichnet, daß an der Zuführung (51) Sprühdüsen (55) vorgesehen sind, durch die das flüssige Medium auf die Oberfläche des Trägerbandes (21) aufsprühbar ist. Einrichtung nach Anspruch 12, dadurch gekennzeichnet, daß über die Zufuhrung (51 , 59) neselfahige Feststoffe in Rinnen (57) einbringbar sind, wobei die Feststoffe mit der Oberflache des Tragerbandes (21) in Kontakt bringbar sind14. Device according to claim 12, characterized in that on the feed (51) spray nozzles (55) are provided, through which the liquid medium can be sprayed onto the surface of the carrier tape (21). Device according to claim 12, characterized in that nesal-capable solids can be introduced into channels (57) via the feed (51, 59), the solids being able to be brought into contact with the surface of the carrier belt (21)
Einrichtung nach Anspruch 12, dadurch gekennzeichnet, daß das Medium als nachladbarer Festkörper (B) gegen die Oberflache desDevice according to claim 12, characterized in that the medium as a reloadable solid (B) against the surface of the
Tragerbandes (21) pressbar istCarrier belt (21) can be pressed
Einrichtung nach einem der Ansprüche 12 bis 16, dadurch gekennzeichnet, daß dem metallurgischen Gefäß (11) eine Vorrichtung (81) zum Aufrauhen derDevice according to one of claims 12 to 16, characterized in that the metallurgical vessel (11) has a device (81) for roughening the
Oberflache des Tragerbandes (21) vorgeschaltet istSurface of the carrier belt (21) is connected upstream
Einrichtung nach Anspruch 17, dadurch gekennzeichnet, daß die Vorrichtung (81) zum Aufrauhen der Oberfläche des Tragerbandes (21) ein Sandstrahler (82) istDevice according to claim 17, characterized in that the device (81) for roughening the surface of the carrier belt (21) is a sandblaster (82)
Einrichtung nach Anspruch 17, dadurch gekennzeichnet, daß die Vorrichtung (81) zum Aufrauhen der Oberflache des Tragerbandes (21)Device according to claim 17, characterized in that the device (81) for roughening the surface of the carrier tape (21)
Bürsten o a sindBrushes or the like
Einrichtung nach einem der Ansprüche 12 bis 19, dadurch gekennzeichnet, daß Meßelemente (91 ,92, 93) zum Erfassen der Schmelzentemperatur, derDevice according to one of claims 12 to 19, characterized in that measuring elements (91, 92, 93) for detecting the melt temperature, the
Temperatur sowie der Geschwindigkeit des Tragerbandes (21) vorgesehen sind, die über einen Prozessor (94) mindestens einen Aktuator (95) zur Einstellung der Geschwindigkeit des Tragerbandes (21) steuern Temperature and the speed of the carrier belt (21) are provided, which control at least one actuator (95) for setting the speed of the carrier belt (21) via a processor (94)
21. Einrichtung nach Anspruch 12, dadurch gekennzeichnet, daß das metallurgische Gefäß (11) durch eine Haube (63) abgedeckt ist, die mit einer Gasversorgung (58) zur Versorgung mit Inertgas, in Verbindung steht, und die das beschichtete Trägerband umhüllt, bis dessen Oberfläche durcherstarrt ist.21. The device according to claim 12, characterized in that the metallurgical vessel (11) is covered by a hood (63) which is connected to a gas supply (58) for supplying inert gas, and which envelops the coated carrier tape until the surface of which has solidified.
22. Einrichtung nach einem der Ansprüche 12 bis 21 , dadurch gekennzeichnet, daß dem metallurgischen Gefäß (11) in Abzugsrichtung des Trägerbandes (22) mindestens ein Walzgerüst (33) nachgeordnet ist.22. Device according to one of claims 12 to 21, characterized in that at least one roll stand (33) is arranged downstream of the metallurgical vessel (11) in the withdrawal direction of the carrier strip (22).
23. Metallband aus Verbundwerkstoff, von dem mindestens ein Werkstoff aus nicht rostendem Stahl ist, wobei auf das durch ein Auftragsmaterial geführtes Trägerband eine deutlich dünnere Schicht aufkristallisiert wird, hergestellt nach dem Verfahren entsprechend Anspruch 1 und mit einer Vorrichtung entsprechend Anspruch 12, dadurch gekennzeichnet, daß die Beschichtung auf mindestens einer Seite des Trägerbandes eine Dicke (dA) von dA = 0,01 bis 0,3 x D mit D = Dicke des als Mutterstrang eingesetzten Trägerbandes besitzt, daß die Bindeschicht eine Dicke von (dB) von dB = 5 bis 150 μm besitzt, daß die Bindeschicht eine Verzahnungslinie aufweist, die die dem Mutterstrang wie auch der Auftragsschicht zuzuordnende Bindeschicht zusätzlich formschlüssig verbindet, und daß ein kontinuierlicher Übergang von Legierungselementen zwischen dem Mutterstrang und dem Beschichtungswerkstoff vorhanden ist. 23. A metal strip made of composite material, of which at least one material is made of stainless steel, a significantly thinner layer being crystallized onto the carrier strip guided by an application material, produced by the method according to claim 1 and with a device according to claim 12, characterized in that that the coating on at least one side of the carrier tape has a thickness (d A ) of d A = 0.01 to 0.3 x D with D = thickness of the carrier tape used as the mother strand, that the binding layer has a thickness of (d B ) of d B = 5 to 150 μm has that the binding layer has a toothing line which additionally positively connects the binding layer to be assigned to the mother strand and also to the application layer, and that there is a continuous transition of alloying elements between the mother strand and the coating material.
EP98966569A 1997-12-19 1998-12-15 Method for producing a strip-like metal composite by high temperature dip coating Expired - Lifetime EP1042525B1 (en)

Applications Claiming Priority (3)

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DE19758140 1997-12-19
DE19758140A DE19758140A1 (en) 1997-12-19 1997-12-19 Process for producing composite metal products
PCT/DE1998/003764 WO1999032683A1 (en) 1997-12-19 1998-12-15 Method for producing a strip-like metal composite by high temperature dip coating

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DE19758140A1 (en) 1999-07-08
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CN1282382A (en) 2001-01-31
BR9814297A (en) 2000-10-03
CN1189586C (en) 2005-02-16
AU735907B2 (en) 2001-07-19
ATE262048T1 (en) 2004-04-15
AU2410399A (en) 1999-07-12
KR20010024760A (en) 2001-03-26
EP1042525B1 (en) 2004-03-17
CA2315797A1 (en) 1999-07-01
DE59811020D1 (en) 2004-04-22
US6436556B1 (en) 2002-08-20

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