EP0026946A1 - Process for plating a steel strip or sheet - Google Patents

Process for plating a steel strip or sheet Download PDF

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Publication number
EP0026946A1
EP0026946A1 EP80200684A EP80200684A EP0026946A1 EP 0026946 A1 EP0026946 A1 EP 0026946A1 EP 80200684 A EP80200684 A EP 80200684A EP 80200684 A EP80200684 A EP 80200684A EP 0026946 A1 EP0026946 A1 EP 0026946A1
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EP
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Prior art keywords
sheet
steel strip
lead
tin
plated
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Granted
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EP80200684A
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German (de)
French (fr)
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EP0026946B1 (en
Inventor
Adalbert Bartsch
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Aurubis AG
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Norddeutsche Affinerie AG
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Priority to AT80200684T priority Critical patent/ATE3063T1/en
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    • 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
    • C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
    • C23C26/02—Coating not provided for in groups C23C2/00 - C23C24/00 applying molten material to the substrate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/04—Energy stored by deformation of elastic members
    • H01H5/18—Energy stored by deformation of elastic members by flexing of blade springs

Definitions

  • the invention relates to a method for cladding steel strip or sheet with metals or metal alloys which have a melting point lower than that of steel, by molten application when the steel strip or sheet to be clad is inclined and subsequent forced cooling.
  • the sheet to be plated is inserted at an acute angle to the horizontal obliquely from above into a lead bath covered with a flux layer, at the end of the lead bath through a guide gap and finally through to lead a die with a dimension corresponding to the desired plating thickness (DE-OS 20 08 454).
  • this method has the disadvantage that the lead bath and the entire device have to be emptied and totally cleaned at intervals of hours, since in particular the copper alloys which are used a lot have a tendency to segregate.
  • Another disadvantage is that warping with uneven plating can hardly be avoided.
  • the object of the invention is to provide a method which does not have the disadvantages of the known, in particular the aforementioned methods, but is simple to use and reliable and operates largely maintenance-free.
  • the object is achieved in that the method of the type mentioned at the outset is designed in accordance with the invention in such a way that the melt is fixed at least in the solidification area by means of a roller band which runs parallel to the steel strip or sheet and is adjustable and the side-mounted sliding shoes and the atmosphere in the region of the Melting sets weakly reducing.
  • the inclined position of the steel strip or sheet is brought about by a suitable roller arrangement. It is preferably set to a value between 30 and 70 °, in particular 45 °.
  • any desired plating thicknesses which essentially depend on the customer's wishes, can be set. They generally move between 2 and 20 mm, but can also have other dimensions if necessary. In particular, large thicknesses are not limited by the method according to the invention.
  • the melt feed is expediently such that there is only a small excess of melt in front of the roller belt in the region of the upper deflecting roller.
  • the level of the melt level can be regulated automatically using suitable indicators.
  • the gas atmosphere is set primarily for the purpose of preventing oxidation of the melt and thus a change in its properties.
  • the preparation of the steel strip or sheet is done in a conventional manner.
  • the rough cleaning e.g. Removal of scale, done by steel gravel blasting.
  • This is usually followed by a pickling treatment which is carried out in such a way that it largely avoids the evolution of hydrogen.
  • pickling liquid is sprayed through a nozzle system over the shortest possible passage and final cleaning is carried out by means of water vapor, as a result of which post-oxidation - for example in comparison with water rinsing - is practically avoided.
  • a master alloy can then be applied, which on the one hand protects the steel surface from the effects of oxidation and on the other hand acts as an adhesion promoter for the subsequent plating.
  • the steel strip or sheet can be fed to the plating stage with the residual heat remaining from the application of the alloy.
  • the forced cooling takes place indirectly via cooled rollers, preferably within the roller belt area directly by applying water and / or compressed air to the unplated (lower) side of the steel belt or sheet. Direct cooling of the back of the roller belt with water or compressed air can be advantageous.
  • the method according to the invention is universally applicable and practically suitable for the application of all metals which on the one hand have a melting temperature below the melting temperature of the steel and on the other hand are applied by plating processes.
  • it is suitable for plating with lead or copper or their alloys.
  • a previous alloy treatment is recommended, with the steel strip or sheet being coated with lead or lead alloy with tin or a tin-lead alloy in the case of the intended cladding or with copper or copper alloy with the intended cladding Plated tin or a silver solder.
  • the tin-lead alloy coating is preferably obtained by spraying the steel strip or sheet with a suspension of agitated tin or tin / lead powder in liquid flux.
  • the steel strip 1 which has been thoroughly cleaned in preliminary stages (steel gravel blasting, brief pickling with dilute hydrochloric acid, acid and blowing off with water vapor), is heated by burner 2 and sprayed by means of the storage container 3 with a suspension of stirred tin-lead powder in liquid flux .
  • 4 represents a fluidized bed container for mixed tin powder and 5 a flux container. This is followed by heating to a temperature which is above the melting temperature of the master alloy.
  • the steel strip then runs into the plating area.
  • the burner 6 heats it up to the lead temperature (approx. 350 ° C.) and applies molten lead that flows in from the melting boiler 7.
  • the melt feed is dimensioned such that a comparatively small excess of melt is present.
  • a reducing burner 8 creates a weakly reducing atmosphere under the cover 9, so that the nature of the lead cannot experience any change due to atmospheric influences.
  • the thickness of the cladding results from the position of the roller belt 10 relative to the steel belt 1.
  • the roller belt 10 is guided through deflection rollers 11 and 12 and support rollers 13.
  • the plated steel strip is forced to cool by blowing air (nozzle 14) and spraying water (nozzle 15). With the help of the scraper 16 and the drip pan 17, the cooling water is collected and can be used for recooling after recooling.
  • the clad steel strip then goes through quality control stations and is finally cut to the desired formats.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating With Molten Metal (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Glass Compositions (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Laminated Bodies (AREA)

Abstract

A cladding process and apparatus in which steel strip or sheet is cladded with a metal of lower melting point, e.g. lead, by maintaining a bank of constant level of the molten cladding material between a belt and the strip or sheet substrate which passes along an inclined path and is cooled to harden the molten material thereon. During the cooling process the applied material is compressed against the substrate.

Description

Die Erfindung betrifft ein Verfahren zum Plattieren von Stahlband oder -blech mit Metallen oder Metallegierungen, die einen gegenüber Stahl tieferliegenden Schmelzpunkt aufweisen, durch schmelzflüssigen Auftrag bei Schräglage des zu plattierenden Stahlbandes oder -bleches und anschließende Zwangskühlung.The invention relates to a method for cladding steel strip or sheet with metals or metal alloys which have a melting point lower than that of steel, by molten application when the steel strip or sheet to be clad is inclined and subsequent forced cooling.

Es ist bekannt, insbesondere Stahlband zu plattieren, indem Metalle oder Metallegierungen in flüssiger Form entweder in ein U-förmiges Profil von bestimmter Neigung eingegossen (DE-PS 718 528) oder aus einer trichterförmigen Vorrichtung auf die in Schräglage befindlichen Unterlagen aufgebracht werden (GB-PS 1 356 782).It is known to plate steel strip in particular, by pouring metals or metal alloys in liquid form either into a U-shaped profile of a certain inclination (DE-PS 718 528) or from a funnel-shaped device onto the inclined documents (GB- PS 1 356 782).

Bei beiden Verfahren ist es nachteilig, daß der Vorschub der Unterlagen und die Abkühlung der aufgebrachten Schmelze mit hoher, im rauhen Betrieb praktisch nicht durchführbarer Präzision aufeinander abgestimmt werden müssen, wenn Fehlchargen oder Betriebsstörungen vermieden werden sollen. Bei dem Verfahren gemäß DE-PS 718 528 kommt hinzu, daß nur bestimmt geformte Stahlbänder beschichtbar sind bzw. vollgegossen werden können.In both processes, it is disadvantageous that the feed of the documents and the cooling of the applied melt have to be coordinated with one another with high precision, which cannot be practically carried out in rough operation, if faulty batches or operational disturbances are to be avoided. In the method according to DE-PS 718 528 there is also the fact that only certain shaped steel strips can be coated or can be fully cast.

Bei einem weiteren Verfahren zur Herstellung einer Bleiplattierung ist vorgesehen, das zu plattierende 'Blech im spitzen Winkel zur Waagerechten schräg von oben in ein mit einer Flußmittelschicht bedecktes Bleibad einzuführen, am Ende des Bleibades durch einen Führungsspalt und schließlich durch eine Matrize mit einer Abmessung entsprechend der gewünschten Plattierdicke zu führen (DE-OS 20 08 454). Dieses Verfahren hat jedoch den Nachteil, daß das Bleibad sowie die Gesamtvorrichtung in Zeitabständen von Stunden entleert und total ge.- reinigt werden muß, da insbesondere die viel verwendeten kupferlegierten Bleisorten erheblich zur Ausseigerung neigen. Weiterhin ist nachteilig, daß Verwerfungen mit ungleichmäßiger Plattierung kaum zu vermeiden sind. Problematisch sind zudem die Abdichtung der Matrize gegen auslaufendes Blei und der Anfahrvorgang, der infolge der bereits vorerwähnten häufigen Reinigung des Bleibehälters vergleichsweise oft vorgenommen werden muß. Nicht zuletzt kommt es bei den notwendigen großen Zugkräften, hervorgerufen durch die Zugvorrichtung gegen den Widerstand der Führungs- und Richtelemente bei den vorgegebenen.Temperaturen, zu Längenänderungsdifferenzen zwischen Grundblech, Bleischicht und Feinblech, was zu Komplikationen im kritischen Bereich des Führungsspaltes führen kann.In a further method for producing a lead plating, it is provided that the sheet to be plated is inserted at an acute angle to the horizontal obliquely from above into a lead bath covered with a flux layer, at the end of the lead bath through a guide gap and finally through to lead a die with a dimension corresponding to the desired plating thickness (DE-OS 20 08 454). However, this method has the disadvantage that the lead bath and the entire device have to be emptied and totally cleaned at intervals of hours, since in particular the copper alloys which are used a lot have a tendency to segregate. Another disadvantage is that warping with uneven plating can hardly be avoided. Problems are also the sealing of the die against leaking lead and the start-up process, which has to be carried out comparatively often due to the aforementioned frequent cleaning of the lead container. Last but not least, the large tensile forces required, caused by the pulling device against the resistance of the guide and straightening elements at the specified temperatures, lead to differences in length change between the base plate, lead layer and thin plate, which can lead to complications in the critical area of the guide gap.

Aufgabe der Erfindung ist, ein Verfahren bereitzustellen, das die Nachteile der bekannten, insbesondere vorgenannten Verfahren nicht besitzt, sondern einfach in der Anwendung und betriebssicher ist und weitgehend wartungsfrei arbeitet.The object of the invention is to provide a method which does not have the disadvantages of the known, in particular the aforementioned methods, but is simple to use and reliable and operates largely maintenance-free.

Die Aufgabe wird gelöst, indem das Verfahren der eingangs genannten Art entsprechend der Erfindung derart ausgestaltet wird, daß man die Schmelze mindestens im Erstarrungsbereich durch ein gegenüber dem Stahlband oder -blech parallel verlaufendes und abstandsverstellbares Walzenband sowie seitlich angebrachte Gleitschuhe fixiert und die Atmosphäre im Bereich des Aufschmelzens schwach reduzierend einstellt.The object is achieved in that the method of the type mentioned at the outset is designed in accordance with the invention in such a way that the melt is fixed at least in the solidification area by means of a roller band which runs parallel to the steel strip or sheet and is adjustable and the side-mounted sliding shoes and the atmosphere in the region of the Melting sets weakly reducing.

Die Schräglage des Stahlbandes oder -bleches wird durch geeignete Rollenanordnung herbeigeführt. Vorzugsweise wird sie auf einen Wert zwischen 30 und 70°, insbesondere 45°, eingestellt.The inclined position of the steel strip or sheet is brought about by a suitable roller arrangement. It is preferably set to a value between 30 and 70 °, in particular 45 °.

Aufgrund des abstandsverstellbaren Walzenbandes können weitgehend beliebige Plattierungsdicken, die sich im wesentlichen nach den Wünschen des Abnehmers richten, eingestellt werden. Sie bewegen sich im allgemeinen zwischen 2 und 20 mm, können jedoch im Bedarfsfall durchaus auch andere Abmessungen aufweisen. Insbesondere großen Dicken sind durch das erfindungsgemäße Verfahren keine Grenzen gesetzt.Due to the distance-adjustable roller belt, any desired plating thicknesses, which essentially depend on the customer's wishes, can be set. They generally move between 2 and 20 mm, but can also have other dimensions if necessary. In particular, large thicknesses are not limited by the method according to the invention.

Der Schmelzezulauf erfolgt zweckmäßigerweise derart, daß sich vor dem Walzenband im Bereich der oberen Umlenkwalze ein nur geringer Schmelzeüberschuß befindet. Die Höhe des Schmelzespiegels kann dabei mit Hilfe geeigneter Indikatoren automatisch geregelt werden.The melt feed is expediently such that there is only a small excess of melt in front of the roller belt in the region of the upper deflecting roller. The level of the melt level can be regulated automatically using suitable indicators.

Die Einstellung der Gasatmosphäre geschieht vornehmlich zu dem Zweck, eine Oxidation der Schmelze und damit eine Veränderung ihrer Eigenschaften zu verhindern. In der bevorzugten Ausgestaltung der Erfindung, bei der man die Atmosphäre durch Verbrennung mit einer Luftverhältniszahl A von 0,90 bis 0,95 (λ = 1 bedeutet stöchiometrische Verbrennung) einstellt, wird zudem erzielt, daß bei geeigneter Anordnung der Brenner die Flammenkegel ca. 3 bis 15 mm tief in die Schmelze eintauchen, dadurch einen zusätzlichen Wärmeschub erzeugen und gleichzeitig eine die Bindung positiv beeinflussende Rührwirkung auf die Schmelze haben.The gas atmosphere is set primarily for the purpose of preventing oxidation of the melt and thus a change in its properties. In the preferred embodiment of the invention, in which the atmosphere is set by combustion with an air ratio A of 0.90 to 0.95 (λ = 1 means stoichiometric combustion), it is also achieved that, with a suitable arrangement of the burners, the flame cones approx. Immerse 3 to 15 mm deep in the melt, thereby generating an additional heat boost and at the same time having a stirring effect on the melt that positively influences the bond.

Es ist vorteilhaft, Länge, Stellung und Vorschub des parallel zum Stahlband oder -blech verlaufenden Walzenbandes so zu bemessen, daß im Anschluß an die Erstarrung die Schmelze etwa im teigigen Zustand einer Knetbeanspruchung unterworfen werden kann. Hierdurch werden insbesondere eine Verdichtung erzielt und die Ursache für sonst gelegentlich auftretende Gefügerisse behoben.It is advantageous to measure the length, position and feed of the roller belt running parallel to the steel strip or sheet metal such that the melt can be subjected to a kneading stress in the pasty state after solidification. As a result, compaction is achieved in particular and the cause of structural cracks that otherwise occur occasionally is eliminated.

Je nach beabsichtigter Verwendung des plattierten Stahlbandes oder -bleches kann es zweckmäßig sein, durch entsprechende Anordnung der Gleitschuhe die Plattierung an einer oder an beiden Seiten nicht bis zur Band- oder Blechkante vorzunehmen, sondern einen beispielsweise bis 5 cm breiten Randstreifen unplattiert zu lassen. Dies ist insbesondere dann der Fall, wenn die Stahlbänder oder -bleche nach entsprechender Verformung zu Apparaten oder Apparateteilen verschweißt werden sollen.Depending on the intended use of the clad steel Bandes or sheets, it may be appropriate, by appropriate arrangement of the sliding shoes, not to perform the plating on one or both sides up to the band or sheet edge, but to leave an edge strip, for example up to 5 cm wide, unplated. This is particularly the case if the steel strips or sheets are to be welded into apparatuses or apparatus parts after corresponding deformation.

Die Vorbereitung des Stahlbandes oder -bleches geschieht auf an sich übliche Weise. Hierbei kann die Grobreinigung, z.B. Entfernung von Zunder, durch Stahlkies-Strahlen erfolgen. Üblicherweise schließt sich dann eine Beizbehandlung an, die derart ausgeführt wird, daß sie unter weitgehender Vermeidung einer Wasserstoffentwicklung erfolgt. Hierzu wird - als vorteilhafte Ausführungsform der Erfindung - auf einer möglichst kurzen Durchlaufstrecke Beizflüssigkeit durch ein Düsensystem aufgespritzt und eine Endreinigung durch Wasserdampf vorgenommen, wodurch eine Nachoxidation - etwa im Vergleich gegenüber einer Wasserspülung - praktisch vermieden wird.The preparation of the steel strip or sheet is done in a conventional manner. The rough cleaning, e.g. Removal of scale, done by steel gravel blasting. This is usually followed by a pickling treatment which is carried out in such a way that it largely avoids the evolution of hydrogen. For this purpose - as an advantageous embodiment of the invention - pickling liquid is sprayed through a nozzle system over the shortest possible passage and final cleaning is carried out by means of water vapor, as a result of which post-oxidation - for example in comparison with water rinsing - is practically avoided.

Soweit erforderlich oder erwünscht, kann dann eine Vorlegierung aufgebracht werden, die einerseits die Stahloberfläche vor Oxidationseinflüssen schützt und andererseits als Haftvermittler für die anschließende Plattierung wirkt.If necessary or desired, a master alloy can then be applied, which on the one hand protects the steel surface from the effects of oxidation and on the other hand acts as an adhesion promoter for the subsequent plating.

Das Stahlband oder -blech kann mit der von der Aufbringung der Legierung verbliebenen Restwärme der Plattierungsstufe zugeführt werden. Besonders vorteilhaft ist es jedoch, zuvor eine Erhitzung auf eine Temperatur vorzunehmen, die etwa in der Nähe der Temperatur der der Plattierung dienenden Schmelze liegt. Hierdurch wird eine besonders gute Haftung der Plattierung erzielt.The steel strip or sheet can be fed to the plating stage with the residual heat remaining from the application of the alloy. However, it is particularly advantageous to heat beforehand to a temperature which is approximately in the vicinity of the temperature of the melt used for plating. This results in a particularly good adhesion of the plating.

Nachdem auf das Stahlband oder -blech das schmelzflüssige Metall bzw. die schmelzflüssige Metallegierung aufgebracht ist, erfolgt die Zwangskühlung indirekt über gekühlte Walzen, vorzugsweise innerhalb des Walzenbandbereiches direkt durch Aufbringen von Wasser und/oder Druckluft auf die nichtplattierte (untere) Seite des Stahlbandes oder -bleches. Eine direkte Kühlung der Rückseite des Walzenbandes mit Wasser oder Druckluft kann vorteilhaft sein.After the molten on the steel strip or sheet Metal or the molten metal alloy is applied, the forced cooling takes place indirectly via cooled rollers, preferably within the roller belt area directly by applying water and / or compressed air to the unplated (lower) side of the steel belt or sheet. Direct cooling of the back of the roller belt with water or compressed air can be advantageous.

Das erfindungsgemäße Verfahren ist universell anwendbar und praktisch zur Aufbringung aller Metalle geeignet, die einerseits eine Schmelztemperatur unterhalb der Schmelztemperatur des Stahles haben und andererseits durch Plattierverfahren aufgebracht werden. Insbesondere ist es geeignet für die Plattierung mit Blei oder Kupfer bzw. deren Legierungen. Je nach Art der aufzubringenden Metalle oder Metallegierungen empfiehlt sich eine vorherige Legierungsbehandlung, wobei man das Stahlband oder -blech im Falle der vorgesehenen Plattierung mit Blei oder Bleilegierung mit Zinn oder einer Zinn-Blei- Legierung bzw. bei einer vorgesehenen Plattierung mit Kupfer oder Kupferlegierung mit Zinn oder einem Silberlot überzieht. Der Überzug mit einer Zinn-Blei-Legierung wird vorzugsweise erhalten, indem man das Stahlband oder -blech mit einer Suspension von aufgerührtem Zinn- oder Zinn/Blei-Pulver in flüssigem Flußmittel besprüht.The method according to the invention is universally applicable and practically suitable for the application of all metals which on the one hand have a melting temperature below the melting temperature of the steel and on the other hand are applied by plating processes. In particular, it is suitable for plating with lead or copper or their alloys. Depending on the type of metals or metal alloys to be applied, a previous alloy treatment is recommended, with the steel strip or sheet being coated with lead or lead alloy with tin or a tin-lead alloy in the case of the intended cladding or with copper or copper alloy with the intended cladding Plated tin or a silver solder. The tin-lead alloy coating is preferably obtained by spraying the steel strip or sheet with a suspension of agitated tin or tin / lead powder in liquid flux.

Die wesentlichen Vorzüge der vorliegenden Erfindung sind:

  • Die Plattierung sowie Vor- und Nachbehandlung erfolgen im Durchlauf. Dabei sind jederzeit Kontroll- und Zugriffsmöglichkeiten gegeben. Es können Stahlbänder oder -bleche praktisch jeder handelsüblichen Breite und Dicke plattiert werden. Es sind beträchtliche Vorschubgeschwindigkeiten möglich, die in gewisser Abhängigkeit von der Dicke der Plattierung bis zu ca. 40 m/min betragen können.
  • Die Erfindung wird anhand der Figur, die schematisch den Bereich der Vorlegierung und der Plattierung veranschaulicht, näher und anhand der Plattierung mit Blei beispielsweise erläutert.
The main advantages of the present invention are:
  • The plating and pre- and post-treatment are carried out in one pass. Control and access options are available at all times. Steel strips or sheets can be clad in practically any standard width and thickness. Considerable feed speeds are possible which, depending on the thickness of the cladding, can be up to approx. 40 m / min.
  • The invention is explained in more detail with reference to the figure, which schematically illustrates the area of the master alloy and the plating, and for example with the aid of the plating with lead.

Das in Vorstufen gründlich gereinigte Stahlband 1 (Stahlkies-Strahlen, kurzzeitiges Beizen mit verbünnter Salz-, säure und Abblasen mit Wasserdampf).wird durch Brenner 2 erwärmt und mittels des Vorratsbehälters 3 mit einer Suspension von aufgerührtem Zinn-Blei-Pulver in flüssigem Flußmittel besprüht. 4 stellt einen Wirbelbettbehälter für Mischzinnpulver und 5 einen Flußmittelbehälter dar. Anschließend erfolgt eine Aufheizung auf eine Temperatur, die über der Schmelztemperatur der Vorlegierung liegt.The steel strip 1, which has been thoroughly cleaned in preliminary stages (steel gravel blasting, brief pickling with dilute hydrochloric acid, acid and blowing off with water vapor), is heated by burner 2 and sprayed by means of the storage container 3 with a suspension of stirred tin-lead powder in liquid flux . 4 represents a fluidized bed container for mixed tin powder and 5 a flux container. This is followed by heating to a temperature which is above the melting temperature of the master alloy.

Das Stahlband läuft dann in den Plattierungsbereich ein. Durch den Brenner 6 wird es auf Verbleiungstemperatur (ca. 350 °C) aufgeheizt und mit Bleischmelze, die aus dem Schmelzkessel 7 zuläuft, beaufschlagt. Der Schmelzezulauf wird dabei derart bemessen, daß ein vergleichsweise geringer Schmelzeüberschuß vorhanden ist. Durch einen reduzierend arbeitenden Brenner 8 wird unter der Abdeckung 9 eine schwach reduzierende Atmosphäre geschaffen, so daß die Beschaffenheit des Bleies keine Veränderung durch atmosphärische Einflüsse erfahren kann.The steel strip then runs into the plating area. The burner 6 heats it up to the lead temperature (approx. 350 ° C.) and applies molten lead that flows in from the melting boiler 7. The melt feed is dimensioned such that a comparatively small excess of melt is present. A reducing burner 8 creates a weakly reducing atmosphere under the cover 9, so that the nature of the lead cannot experience any change due to atmospheric influences.

Die Dicke der Plattierung ergibt sich aus der Lage des Walzenbandes 10 zum Stahlband 1. Das Walzenband 10 wird durch Umlenkrollen 11 und 12 sowie Stützrollen 13 geführt.The thickness of the cladding results from the position of the roller belt 10 relative to the steel belt 1. The roller belt 10 is guided through deflection rollers 11 and 12 and support rollers 13.

Die Zwangskühlung des plattierten Stahlbandes geschieht durch Aufblasen von Luft (Düse 14) und Aufsprühen von Wasser (Düsen 15). Mit Hilfe des Abstreifers 16 und der Auffangwanne17 wird das Kühlwasser gesammelt und kann nach Rückkühlung zur erneuten Kühlung eingesetzt werden. Das plattierte Stahlband durchläuft anschließend Stationen der Qualitätskontrolle und wird schließlich auf die jeweils erwünschten Formate geschnitten.The plated steel strip is forced to cool by blowing air (nozzle 14) and spraying water (nozzle 15). With the help of the scraper 16 and the drip pan 17, the cooling water is collected and can be used for recooling after recooling. The clad steel strip then goes through quality control stations and is finally cut to the desired formats.

Claims (12)

1. Verfahren zum Plattieren von Stahlband oder -blech mit Metallen oder Metallegierungen, die einen gegenüber Stahl.tieferliegenden Schmelzpunkt aufweisen, durch schmelzflüssigen Auftrag bei Schräglage des zu plattierenden Stahlbandes oder -bleches und anschließende Zwangskühlung, dadurch gekennzeichnet, daß man die Schmelze mindestens im Erstarrungsbereich durch ein gegenüber dem Stahlband oder -blech parallel verlaufendes und abstandsverstellbares Walzenband sowie seitlich angebrachte Gleitschuhe fixiert und die Atmosphäre im Bereich des Aufschmelzens schwach reduzierend einstellt.1. A method for plating steel strip or sheet with metals or metal alloys which have a melting point lower than steel, by molten application at an inclined position of the steel strip or sheet to be plated and subsequent forced cooling, characterized in that the melt is at least in the solidification range fixed by means of a roller band running parallel to and spaced from the steel band or sheet, as well as sliding shoes attached to the side and weakly reducing the atmosphere in the area of the melting. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man die Schräglage des zu plattierenden Stahlbandes oder -bleches auf einen Wert zwischen 30 und 70°, vorzugsweise auf 45°, einstellt.2. The method according to claim 1, characterized in that the inclined position of the steel strip or sheet to be plated is set to a value between 30 and 70 °, preferably to 45 °. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß man die Atmosphäre durch Verbrennung mit einer Luftverhältniszahl von 0,90 bis 0,95 einstellt.3. The method according to claim 1 or 2, characterized in that the atmosphere is set by combustion with an air ratio of 0.90 to 0.95. 4. Verfahren nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß man Länge, Stellung und Vorschub des parallel zum Stahlband oder -blech geführten Walzenbandes derart bemißt, daß die Plattierung einer Knetbeanspruchung unterworfen wird.4. The method according to claim 1, 2 or 3, characterized in that the length, position and feed of the roller belt guided parallel to the steel strip or sheet are dimensioned such that the cladding is subjected to a kneading stress. 5. Verfahren nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß man durch entsprechende Anordnung der Gleitschuhe mindestens einseitig einen nichtplattierten Randstreifen erhält.5. The method according to one or more of claims 1 to 4, characterized in that a non-plated edge strip is obtained at least on one side by appropriate arrangement of the sliding shoes. 6. Verfahren nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß man das Stahlband oder -blech vor der Plattierung durch Aufspritzen von Beizflüssigkeit innerhalb einer möglichst kurzen Durchlaufstrecke und anschließend durch Beaufschlagen mit Wasserdampf reinigt.6. The method according to one or more of claims 1 to 5, characterized in that the steel strip or sheet is cleaned before plating by spraying on pickling liquid within the shortest possible passage and then by applying steam. 7. Verfahren nach einem oder mehreren der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß man das Stahlband oder -blech vor der Schmelzezuführung auf etwa Schmelzetemperatur erhitzt.7. The method according to one or more of claims 1 to 6, characterized in that the steel strip or sheet is heated to about melt temperature before the melt supply. 8. Verfahren nach einem oder mehreren der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß man die Zwangskühlung durch Aufbringen von Wasser und/oder Druckluft auf die nichtplattierte Seite des Stahlbandes oder -bleches herbeiführt.8. The method according to one or more of claims 1 to 7, characterized in that one brings about the forced cooling by applying water and / or compressed air to the non-plated side of the steel strip or sheet. 9. Verfahren nach einem oder mehreren der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß man das Stahlband oder -blech mit Blei oder Kupfer bzw. deren Legierungen plattiert.9. The method according to one or more of claims 1 to 8, characterized in that the steel strip or sheet is plated with lead or copper or their alloys. 10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß man das Stahlband oder -blech vor der Plattierung mit Blei oder Bleilegierung mit Zinn oder einer Zinn-Blei-Legierung überzieht.10. The method according to claim 9, characterized in that coating the steel strip or sheet before plating with lead or lead alloy with tin or a tin-lead alloy. 11. Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß man das Stahlband oder -blech vor der Plattierung mit Kupfer oder einer Kupferlegierung mit Zinn oder einem Silberlot überzieht.11. The method according to claim 9, characterized in that one covers the steel strip or sheet before plating with copper or a copper alloy with tin or a silver solder. 12. Verfahren nach Anspruch 10, dadurch gekennzeichnet, daß man das Stahlband oder -blech mit einer Suspension von aufgerührtem Zinn- oder Zinn/Blei-Pulver in flüssigem Flußmittel besprüht.12. The method according to claim 10, characterized in that the steel strip or sheet is sprayed with a suspension of stirred tin or tin / lead powder in a liquid flux.
EP80200684A 1979-09-14 1980-07-14 Process for plating a steel strip or sheet Expired EP0026946B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80200684T ATE3063T1 (en) 1979-09-14 1980-07-14 METHOD OF PLATING A STEEL STRIP OR SHEET.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792937188 DE2937188A1 (en) 1979-09-14 1979-09-14 PLATING PROCESS
DE2937188 1979-09-14

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EP0026946A1 true EP0026946A1 (en) 1981-04-15
EP0026946B1 EP0026946B1 (en) 1983-04-13

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US (1) US4321289A (en)
EP (1) EP0026946B1 (en)
JP (1) JPS5655558A (en)
AT (1) ATE3063T1 (en)
AU (1) AU536864B2 (en)
DE (2) DE2937188A1 (en)

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JPH0130904B2 (en) 1989-06-22
DE3062736D1 (en) 1983-05-19
AU536864B2 (en) 1984-05-24
JPS5655558A (en) 1981-05-16
AU6236780A (en) 1981-03-19
US4321289A (en) 1982-03-23
ATE3063T1 (en) 1983-04-15
DE2937188A1 (en) 1981-03-19
EP0026946B1 (en) 1983-04-13

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