EP1607147A1 - Method and apparatus to produce a thin sheet or a foil of metallic material by rolling - Google Patents

Method and apparatus to produce a thin sheet or a foil of metallic material by rolling Download PDF

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Publication number
EP1607147A1
EP1607147A1 EP04014179A EP04014179A EP1607147A1 EP 1607147 A1 EP1607147 A1 EP 1607147A1 EP 04014179 A EP04014179 A EP 04014179A EP 04014179 A EP04014179 A EP 04014179A EP 1607147 A1 EP1607147 A1 EP 1607147A1
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EP
European Patent Office
Prior art keywords
rolling
rolling stock
temperature
work rolls
heated
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Application number
EP04014179A
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German (de)
French (fr)
Inventor
Heinrich Kestler
André Dronhofer
Thomas Trenkwalder
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Plansee SE
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Plansee SE
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Publication date
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Priority to EP04014179A priority Critical patent/EP1607147A1/en
Priority to PCT/EP2005/006078 priority patent/WO2005123288A1/en
Publication of EP1607147A1 publication Critical patent/EP1607147A1/en
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B9/00—Measures for carrying out rolling operations under special conditions, e.g. in vacuum or inert atmosphere to prevent oxidation of work; Special measures for removing fumes from rolling mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/40—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling foils which present special problems, e.g. because of thinness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/004—Heating the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/30—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process
    • B21B1/32—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/14—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls
    • B21B13/147—Cluster mills, e.g. Sendzimir mills, Rohn mills, i.e. each work roll being supported by two rolls only arranged symmetrically with respect to the plane passing through the working rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use

Definitions

  • the invention relates to a method and an installation for the production a thin sheet or foil by rolling. She also has the use a sheet or foil produced therewith and a rolled thin sheet or film of a particular material to the object.
  • Lightweight structural components are often referred to as "honeycomb" structures manufactured, i. as a composite body with a middle layer of honeycomb between two cover layers. To achieve the lowest possible weight, should the middle layer and the cover layer made of the thinnest possible material, preferably a film.
  • the object of the invention is a thin sheet or a film of high surface quality to provide a difficult to deform metallic material.
  • the sheet or the film is produced by rolling, wherein in the forming zone to a predetermined Temperature heated rolling stock with non-heated work rolls made of ceramic Material is rolled in a protective gas atmosphere. While one Film has a thickness of less than 0.1 mm, the thickness of a thin sheet more than 0.1 mm and less than 2 mm.
  • a ceramic Material for the work rolls is preferably a nitride or oxynitride ceramic, in particular zirconium nitride or zirconium oxynitride.
  • the temperature of the rolling stock in the forming zone is preferably at least 0.3 times, in particular at least 0.4 times, the homologous temperature of the metallic or intermetallic material.
  • Homologous temperature [K] operating temperature [K] / melting temperature [K]
  • metallic or intermetallic materials according to the invention are preferably used brittle or high-strength materials, in particular Low density materials. So is preferably the brittle / ductile transition temperature of the metallic or intermetallic material the room temperature or the solidification exponent is above 0.3.
  • metallic materials for example, molybdenum, Tungsten, nickel, beryllium or titanium alloys are used.
  • Nickel alloys can be used in particular nickel-based superalloys become.
  • beryllium alloy e.g. a beryllium-iridium alloy used as titanium alloy, e.g. Titanium-aluminum alloys, such as Ti 6242, a titanium based alloy with 6 wt% aluminum.
  • intermetallic materials are silicides, beryllides, aluminides, and here turn to name preferably ⁇ -TiAl-based alloys.
  • Intermetallic materials have a high brittle / ductile transition temperature typically at 0.4-0.5 of the homologous temperature lies. Accordingly, if according to the invention is a thin sheet or a film is produced, the temperature of the rolling stock in the forming above the brittle / ductile transition temperature, i. for example, a TiAl-based alloy, as in ⁇ -TiAl, for example at at least 700 ° C.
  • the thickness of the thin sheet or the film, the or produced according to the invention is preferably at most 200 .mu.m, in particular at most 100 microns, so for example 70 microns or less.
  • the device for heating the rolling stock in the forming zone on a Temperature for materials without a brittle / ductile transition at 0.3 times, preferably 0.4 times the homologous temperature and for materials with a brittle / ductile transition above the brittle / ductile transition temperature is, for example, by thermal radiation or inductive respectively.
  • a conductive heating is performed, i.e. the rolling stock is heated by electrical resistance heating.
  • an electric Contact to the rolling stock is preferably on both sides, ie in front of and behind the work rolls.
  • the contact points for example be formed by contact rollers and / or brushes, which engage the rolling stock.
  • a protective gas atmosphere As a protective gas It is preferred to use a noble gas, in particular argon.
  • the forming speed should be more than 10 s -1 , and the rolling speeds for economic reasons at least 0.1 m / s, in particular at least 0.5 m / s.
  • the vertical rolling force exerted by the work rolls on the rolling stock is preferably at least 3000 kN.
  • the thickness of the rolling stock is preferably more than 1 mm, for example 2 mm or more.
  • the reduction of the rolling stock per rolling pass is preferably at least 10%, in particular at least 20%.
  • a reversing is performed with a Reversierwalzgerüst.
  • Equipment manufactured film can be used for different purposes.
  • the film rolled according to the invention may be e.g. made of a nickel / solder alloy be used as a solder foil.
  • the rolled film according to the invention is suitable for the production of Lightweight structural components suitable for the aerospace industry.
  • So can from the Film has a "honeycomb" structure, i. a composite structure of a middle layer made of honeycomb between two cover layers.
  • the rolled film is cut into strips, for example, which folded and connected to the honeycomb of the middle class be, for example, by welding, whereupon the two cover layers from the film at the middle layer, e.g. be secured by welding.
  • the "honeycomb” structure according to the invention may e.g. in an engine in the exhaust chamber can be arranged, thereby also the noise emission decrease.
  • the structure can also be the rubbing surface for the turbine blades form.
  • the "honeycomb” structure may e.g. in space travel be used as a thermal protection panel.
  • the structure can also be used for other purposes, for example in vehicle construction.
  • the rolling mill has a twelve-roll stand 1 with arranged on both sides Reels 2, 3 on.
  • the twelve rollers consist of the upper and lower Work rolls 4 and 5 and the upper and lower support rollers 6-10 and 11-15, wherein the upper back-up rolls 6 and 10 and the lower back-up rolls 11 and 15 are driven.
  • At least the twelve rollers 4-15 and prefers the reels 2, 3 are arranged in a cabin, not shown, in which a Inert gas atmosphere is located.
  • the drives of the rollers 6, 10 and 11, 15 and the reels 2, 3 are outside this cabin.
  • the drive rollers 4, 5 are made of a ceramic material.
  • the back-up rolls 6-15 are made of steel and are cooled, for example internally by means of water cooling.
  • the rolling stock 17 is coupled to the reels 2, 3. It is powered by current heated conductively by the rolling stock 17.
  • the electrical contact takes place e.g. by contact rollers, not shown, or brushes at the contact points 18 and 19 on both sides, ie in front of and behind the roll stand 1.
  • the rolling stock 17 is reversibly formed in the roll stand 1. After every Rolling passes are the drives for the driven back-up rolls 6, 10 and 11, 15 and for the two reels 2, 3 stopped and again in the opposite Approached direction to transform the rolling stock 17 to the next end. This process is repeated until the desired film thickness is reached, which determined with a Banddickenmeß réelle not shown can, for example, according to the laser-optical triangulation principle is working.
  • the rolling stock 17 used as the starting material is a Sheet of ⁇ -TiAl with a thickness of 3 mm.
  • the work rolls 4, 5 exist made of zirconium nitride. They have a diameter of 40 mm and a bale length of 140 mm.
  • the rolling stock, which has a width of 100 mm, is conductively heated to a temperature of 900-1200 ° C. It will be a reverse rolling with a reduction of 20-25% per roll pass.
  • the rolling speed is about 0.5 m / s.
  • the vertical rolling force of the work roll 4, 5 on the rolling stock 17 is about 4000 kN.
  • the ⁇ -TiAl shows Rolling a film thickness of 70 microns with a tolerance across the width and Length of 1 micron.

Abstract

The machine (1) hot rolls a thin metal foil (17). The foil is pulled off a first reel (2) and is wound up on a second reel (3) after passing between the pressure rollers (4,5). The pressure rollers are pressed together with a force of at least 3000 kN and are made of ceramic material. The pressure rollers are unheated. The foil is heated by passing an electric current between contacts (18,19) before and after the pressure rollers. There are pyrometers (21,22) placed on the other side of the foil from the contacts. The top and bottom pressure rollers are supported by top (6-10) and bottom (11-15) arrays of backup rollers.

Description

Die Erfindung bezieht sich auf ein Verfahren und eine Anlage zur Herstellung eines Feinblechs oder einer Folie durch Walzen. Sie hat auch die Verwendung eines damit hergestellten Feinblechs bzw. einer Folie und ein gewalztes Feinblech bzw. Folie aus einem bestimmten Werkstoff zum Gegenstand.The invention relates to a method and an installation for the production a thin sheet or foil by rolling. She also has the use a sheet or foil produced therewith and a rolled thin sheet or film of a particular material to the object.

Von Strukturbauteilen in der Luft- und Raumfahrt wird neben einem geringen Gewicht eine hohe Festigkeit bei hohen Temperaturen erwartet. Werkstoffe, die diese Forderungen erfüllen, stellen TiAI-Basislegierungen, wie γ-TiAl dar. Diese Legierungen sind ist jedoch wie andere metallische Werkstoffe, die ein geringes Gewicht und eine hohe Festigkeit bei hohen Temperaturen aufweisen, nur schwer verformbar. Leichtstrukturbauteile werden häufig als "Honeycomb"-Strukturen gefertigt, d.h. als Verbundkörper mit einer Mittelschicht aus Waben zwischen zwei Deckschichten. Um ein möglichst geringes Gewicht zu erreichen, sollten die Mittelschicht und die Deckschicht aus einem möglichst dünnen Material, vorzugsweise einer Folie bestehen.Of structural components in aerospace will be next to a small Weight expected high strength at high temperatures. Materials that meet these requirements, represent TiAl-based alloys, such as γ-TiAl dar. This However, alloys are like other metallic materials that are low in weight Weight and high strength at high temperatures, but difficult deformable. Lightweight structural components are often referred to as "honeycomb" structures manufactured, i. as a composite body with a middle layer of honeycomb between two cover layers. To achieve the lowest possible weight, should the middle layer and the cover layer made of the thinnest possible material, preferably a film.

Aufgabe der Erfindung ist es, ein Feinblech bzw. eine Folie hoher Oberflächenqualität aus einem schwer verformbaren metallischen Werkstoff bereitzustellen.The object of the invention is a thin sheet or a film of high surface quality to provide a difficult to deform metallic material.

Dies wird erfindungsgemäß dadurch erreicht, dass das Feinblech bzw. die Folie durch Walzen hergestellt wird, wobei das in der Umformzone auf eine vorgegebene Temperatur erwärmte Walzgut mit nicht beheizten Arbeitswalzen aus keramischem Material in einer Schutzgasatmosphäre gewalzt wird. Während eine Folie eine Dicke von weniger als 0,1 mm aufweist, beträgt die Dicke eines Feinblechs mehr als 0,1 mm und weniger als 2 mm.This is inventively achieved in that the sheet or the film is produced by rolling, wherein in the forming zone to a predetermined Temperature heated rolling stock with non-heated work rolls made of ceramic Material is rolled in a protective gas atmosphere. While one Film has a thickness of less than 0.1 mm, the thickness of a thin sheet more than 0.1 mm and less than 2 mm.

Erfindungsgemäß wird lediglich das Walzgut erwärmt, denn das keramische Material, aus dem die Arbeitswalzen bestehen, garantiert, dass kein nennenswerter Wärmeübergang von dem erwärmten Walzgut auf das Walzgerüst erfolgt und dadurch das Walzgut abgekühlt wird. Demgemäß kann erfindungsgemäß auf eine Heizung der Arbeitswalzen verzichtet werden. Dabei reicht es aus, um einen hinreichend geringen Wärmeübergang sicherzustellen, dass zumindest am Walzenumfang eine Schicht aus dem keramischen Material vorgesehen ist. Als keramisches Material für die Arbeitswalzen wird vorzugsweise eine Nitrid- oder Oxinitrid-Keramik, insbesondere Zirkonnitrid oder Zirkonoxinitrid verwendet.According to the invention, only the rolling stock is heated, because the ceramic material, which make up the work rolls guarantees that no appreciable Heat transfer from the heated rolling to the rolling stand takes place and thereby the rolling stock is cooled. Accordingly, according to the invention to a Heating the work rolls are waived. It is sufficient to a sufficient low heat transfer ensure that at least the roll circumference a layer of the ceramic material is provided. As a ceramic Material for the work rolls is preferably a nitride or oxynitride ceramic, in particular zirconium nitride or zirconium oxynitride.

Um eine Kaltverfestigung zu vermeiden oder zumindest abzubauen, beträgt erfindungsgemäß die Temperatur des Walzgutes in der Umformzone vorzugsweise wenigstens das 0,3-fache, insbesondere mindestens das 0,4-fache der homologen Temperatur des metallischen oder intermetallischen Werkstoffs. Dabei gilt: Homologe Temperatur [K] = Betriebstemperatur [K] / Schmelztemperatur [K] In order to avoid or at least reduce work hardening, according to the invention the temperature of the rolling stock in the forming zone is preferably at least 0.3 times, in particular at least 0.4 times, the homologous temperature of the metallic or intermetallic material. Where: Homologous temperature [K] = operating temperature [K] / melting temperature [K]

Als metallische oder intermetallische Werkstoffe werden erfindungsgemäß vorzugsweise spröde oder hoch verfestigende Werkstoffe verwendet, insbesondere Werkstoffe geringer Dichte. So liegt vorzugsweise die Spröd/Duktil-Übergangstemperatur des metallischen oder intermetallischen Werkstoffs über der Raumtemperatur oder der Verfestigungsexponent liegt über 0,3.As metallic or intermetallic materials according to the invention are preferably used brittle or high-strength materials, in particular Low density materials. So is preferably the brittle / ductile transition temperature of the metallic or intermetallic material the room temperature or the solidification exponent is above 0.3.

Als metallische Werkstoffe können erfindungsgemäß beispielsweise Molybdän-, Wolfram-, Nickel-, Beryllium- oder Titanlegierungen verwendet werden. Als Nickellegierungen können insbesondere Nickelbasis-Superlegierungen eingesetzt werden. Als Berylliumlegierung kann z.B. eine Beryllium-Iridium-Legierung verwendet werden, und als Titanlegierung, z.B. Titan-Aluminium-Legierungen, wie Ti 6242, eine Titanbasislegierung mit 6 Gew.-% Aluminium.As metallic materials according to the invention, for example, molybdenum, Tungsten, nickel, beryllium or titanium alloys are used. When Nickel alloys can be used in particular nickel-based superalloys become. As the beryllium alloy, e.g. a beryllium-iridium alloy used as titanium alloy, e.g. Titanium-aluminum alloys, such as Ti 6242, a titanium based alloy with 6 wt% aluminum.

Als intermetallische Werkstoffe sind Silizide, Beryllide, Aluminide, und hier wiederum bevorzugt γ-TiAl-Basislegierungen zu nennen.As intermetallic materials are silicides, beryllides, aluminides, and here turn to name preferably γ-TiAl-based alloys.

Intermetallische Werkstoffe weisen eine hohe Spröd/Duktil-Übergangstemperatur auf, die typischerweise bei 0,4-0,5 der homologen Temperatur liegt. Demgemäß liegt, wenn erfindungsgemäß ein Feinblech oder eine Folie hergestellt wird, die Temperatur des Walzgutes in der Umformzone oberhalb der Spröd/Duktil-Übergangstemperatur, d.h. zum Beispiel einer TiAl-Basislegierung, wie bei γ-TiAl, beispielsweise bei mindestens 700°C.Intermetallic materials have a high brittle / ductile transition temperature typically at 0.4-0.5 of the homologous temperature lies. Accordingly, if according to the invention is a thin sheet or a film is produced, the temperature of the rolling stock in the forming above the brittle / ductile transition temperature, i. for example, a TiAl-based alloy, as in γ-TiAl, for example at at least 700 ° C.

Die Stärke des Feinblechs bzw. der Folie, das bzw. die erfindungsgemäß hergestellt wird, beträgt vorzugsweise höchstens 200 µm, insbesondere höchstens 100 µm, also beispielsweise 70 µm oder weniger.The thickness of the thin sheet or the film, the or produced according to the invention is preferably at most 200 .mu.m, in particular at most 100 microns, so for example 70 microns or less.

Die Einrichtung zur Erwärmung des Walzgutes in der Umformzone auf eine Temperatur, die bei Werkstoffen ohne einen Spröd/Duktil-Übergang bei der 0,3-fachen, bevorzugt der 0,4-fachen homologen Temperatur und bei Werkstoffen mit einem Spröd/Duktil-Übergang oberhalb der Spröd/Duktil-Übergangstemperatur liegt, kann beispielsweise durch Wärmestrahlung oder induktiv erfolgen. Vorzugsweise wird jedoch eine konduktive Erwärmung durchgeführt, d.h. das Walzgut durch elektrische Widerstandsheizung erwärmt. Dazu wird vorzugsweise beiderseits, also vor und hinter den Arbeitswalzen ein elektrischer Kontakt an das Walzgut angelegt. Die Kontaktstellen können beispielsweise durch Kontaktwalzen und/oder Bürsten gebildet sein, die an dem Walzgut angreifen.The device for heating the rolling stock in the forming zone on a Temperature for materials without a brittle / ductile transition at 0.3 times, preferably 0.4 times the homologous temperature and for materials with a brittle / ductile transition above the brittle / ductile transition temperature is, for example, by thermal radiation or inductive respectively. Preferably, however, a conductive heating is performed, i.e. the rolling stock is heated by electrical resistance heating. To is preferably on both sides, ie in front of and behind the work rolls an electric Contact to the rolling stock. The contact points, for example be formed by contact rollers and / or brushes, which engage the rolling stock.

Um eine Reaktion des erwärmten Walzgutes mit Gasen der Atmosphäre, insbesondere eine Oxidation des Walzgutes zu verhindern, ist erfindungsgemäß zumindest in dem Bereich der Anlage, in dem sich das erwärmte Walzgut und das gewalzte erwärmte Feinblech bzw. die gewalzte Folie auf einer Temperatur befinden, bei der der metallische Werkstoff mit einem Gas der Atmosphäre, insbesondere Sauerstoff, reagiert, eine Schutzgasatmosphäre vorgesehen. Als Schutzgas wird vorzugsweise ein Edelgas, insbesondere Argon verwendet.To a reaction of the heated rolling with gases of the atmosphere, in particular to prevent oxidation of the rolling stock, according to the invention at least in the area of the plant in which the heated rolling stock and the rolled heated sheet or the rolled foil are at a temperature in which the metallic material with a gas of the atmosphere, in particular Oxygen, reacts, provided a protective gas atmosphere. As a protective gas It is preferred to use a noble gas, in particular argon.

Die Umformgeschwindigkeit soll erfindungsgemäß mehr als 10 s-1 betragen, und die Walzgeschwindigkeiten aus wirtschaftlichen Gründen mindestens 0,1 m/s, insbesondere mindestens 0,5 m/s. Die vertikale Walzkraft, die von den Arbeitswalzen auf das Walzgut ausgeübt wird, beträgt vorzugsweise mindestens 3000 kN. Die Stärke des Walzgutes beträgt vorzugsweise mehr als 1 mm, beispielsweise 2 mm oder mehr. Die Reduktion des Walzgutes pro Walzstich beträgt vorzugsweise wenigstens 10%, insbesondere mindestens 20%. Vorzugsweise wird ein Reversierwalzen mit einem Reversierwalzgerüst durchgeführt.According to the invention, the forming speed should be more than 10 s -1 , and the rolling speeds for economic reasons at least 0.1 m / s, in particular at least 0.5 m / s. The vertical rolling force exerted by the work rolls on the rolling stock is preferably at least 3000 kN. The thickness of the rolling stock is preferably more than 1 mm, for example 2 mm or more. The reduction of the rolling stock per rolling pass is preferably at least 10%, in particular at least 20%. Preferably, a reversing is performed with a Reversierwalzgerüst.

Die nach dem erfindungsgemäßen Verfahren bzw. mit der erfindungsgemäßen Anlage hergestellte Folie kann für unterschiedliche Zwecke eingesetzt werden. Beispielsweise kann die erfindungsgemäß gewalzte Folie z.B. aus einer Nickel-/Lotlegierung als Lotfolie eingesetzt werden.The according to the inventive method or with the invention Equipment manufactured film can be used for different purposes. For example, the film rolled according to the invention may be e.g. made of a nickel / solder alloy be used as a solder foil.

Vor allem ist die erfindungsgemäß gewalzte Folie aber für die Herstellung von Leichtstrukturbauteilen für die Luft- und Raumfahrt geeignet. So kann aus der Folie eine "Honeycomb"-Struktur, d.h. eine Verbundstruktur aus einer Mittelschicht aus Waben zwischen zwei Deckschichten hergestellt werden. Zur Bildung der Mittelschicht wird die gewalzte Folie beispielsweise in Streifen geschnitten, die gefaltet und miteinander zu den Waben der Mittelschicht verbunden werden, beispielsweise durch Schweißen, worauf die beiden Deckschichten aus der Folie an der Mittelschicht, z.B. durch Schweißen befestigt werden.Above all, however, the rolled film according to the invention is suitable for the production of Lightweight structural components suitable for the aerospace industry. So can from the Film has a "honeycomb" structure, i. a composite structure of a middle layer made of honeycomb between two cover layers. For education the middle layer, the rolled film is cut into strips, for example, which folded and connected to the honeycomb of the middle class be, for example, by welding, whereupon the two cover layers from the film at the middle layer, e.g. be secured by welding.

Die erfindungsgemäße "Honeycomb"-Stuktur kann z.B. in einem Triebwerk in der Abgaskammer angeordnet werden, um damit auch die Geräuschemission herabzusetzen. Die Struktur kann zudem die Anstreiffläche für die Turbinenschaufeln bilden. Ferner kann die "Honeycomb"-Struktur z.B. in der Raumfahrt als Thermoschutzverkleidung verwendet werden. Die Struktur kann jedoch auch für andere Zwecke eingesetzt werden, beispielsweise im Fahrzeugbau.The "honeycomb" structure according to the invention may e.g. in an engine in the exhaust chamber can be arranged, thereby also the noise emission decrease. The structure can also be the rubbing surface for the turbine blades form. Furthermore, the "honeycomb" structure may e.g. in space travel be used as a thermal protection panel. However, the structure can also be used for other purposes, for example in vehicle construction.

Nachstehend ist eine Ausführungsform der erfindungsgemäßen Anlage anhand der beigefügten Zeichnung beispielhaft näher erläutert, deren einzige Figur schematisch eine Walzanlage zeigt.Below is an embodiment of the system according to the invention the accompanying drawing explained in more detail by way of example, whose only figure schematically shows a rolling mill.

Danach weist die Walzanlage ein Zwölf-Walzengerüst 1 mit beidseitig angeordneten Haspeln 2, 3 auf. Die zwölf Walzen bestehen aus den oberen und unteren Arbeitswalzen 4 bzw. 5 und den oberen und unteren Stützwalzen 6-10 bzw. 11-15, wobei die oberen Stützwalzen 6 und 10 und die unteren Stützwalzen 11 und 15 angetrieben sind. Zumindest die zwölf Walzen 4-15 und bevorzugt die Haspeln 2, 3 sind in einer nicht dargestellten Kabine angeordnet, in der sich eine Schutzgasatmosphäre befindet. Die Antriebe der Walzen 6, 10 und 11, 15 sowie der Haspeln 2, 3 befinden sich außerhalb dieser Kabine. Thereafter, the rolling mill has a twelve-roll stand 1 with arranged on both sides Reels 2, 3 on. The twelve rollers consist of the upper and lower Work rolls 4 and 5 and the upper and lower support rollers 6-10 and 11-15, wherein the upper back-up rolls 6 and 10 and the lower back-up rolls 11 and 15 are driven. At least the twelve rollers 4-15 and prefers the reels 2, 3 are arranged in a cabin, not shown, in which a Inert gas atmosphere is located. The drives of the rollers 6, 10 and 11, 15 and the reels 2, 3 are outside this cabin.

Die Antriebswalzen 4, 5 bestehen aus einem Keramikwerkstoff. Die Stützwalzen 6-15 bestehen aus Stahl und werden gekühlt, beispielsweise innen mittels Wasserkühlung.The drive rollers 4, 5 are made of a ceramic material. The back-up rolls 6-15 are made of steel and are cooled, for example internally by means of water cooling.

Das Walzgut 17 ist an den Haspeln 2, 3 angekoppelt. Es wird durch Stromfluss durch das Walzgut 17 konduktiv erwärmt. Die elektrische Kontaktierung erfolgt z.B. durch nicht dargestellte Kontaktwalzen oder Bürsten an den Kontaktstellen 18 und 19 beiderseits, also vor und hinter dem Walzgerüst 1.The rolling stock 17 is coupled to the reels 2, 3. It is powered by current heated conductively by the rolling stock 17. The electrical contact takes place e.g. by contact rollers, not shown, or brushes at the contact points 18 and 19 on both sides, ie in front of and behind the roll stand 1.

Die Temperaturregelung des Walzgutes 17 erfolgt über zwei Pyrometer 21, 22 am Ein- bzw. Auslauf des Walzgutes 17 am Walzgerüst 1.The temperature control of the rolling stock 17 via two pyrometers 21, 22nd at the inlet and outlet of the rolling stock 17 on the rolling mill. 1

Das Walzgut 17 wird reversierend im Walzgerüst 1 umgeformt. Nach jedem Walzstich werden die Antriebe für die angetriebenen Stützwalzen 6, 10 und 11, 15 sowie für die beiden Haspeln 2, 3 angehalten und erneut in der entgegengesetzten Richtung angefahren, um das Walzgut 17 bis zum nächsten Ende umzuformen. Dieser Vorgang wird solange wiederholt, bis die gewünschte Folienstärke erreicht ist, die mit einem nicht dargestellten Banddickenmeßgerät ermittelt werden kann, das beispielsweise nach dem laseroptischen Triangulationsprinzip arbeitet.The rolling stock 17 is reversibly formed in the roll stand 1. After every Rolling passes are the drives for the driven back-up rolls 6, 10 and 11, 15 and for the two reels 2, 3 stopped and again in the opposite Approached direction to transform the rolling stock 17 to the next end. This process is repeated until the desired film thickness is reached, which determined with a Banddickenmeßgerät not shown can, for example, according to the laser-optical triangulation principle is working.

(Beispiel)(Example)

Zur Herstellung einer Folie aus γ-TiAl wird eine Anlage gemäß der beigefügten Zeichnung verwendet. Das als Ausgangsmaterial verwendete Walzgut 17 ist ein Blech aus einem γ-TiAl mit einer Stärke von 3 mm. Die Arbeitswalzen 4, 5 bestehen aus Zirkonnitrid. Sie weisen einen Durchmesser von 40 mm und eine Ballenlänge von 140 mm auf. Das Walzgut, das eine Breite von 100 mm besitzt, wird konduktiv auf eine Temperatur von 900-1200°C erwärmt. Es wird ein Reversierwalzen mit einer Reduktion von 20-25% pro Walzenstich durchgeführt. Die Walzgeschwindigkeit beträgt etwa 0,5 m/s. Die vertikale Walzkraft der Arbeitswalze 4, 5 auf das Walzgut 17 beträgt etwa 4000 kN. Das γ-TiAl weist nach dem Walzen eine Folienstärke von 70 µm mit einer Toleranz über die Breite und Länge von 1 µm auf.To produce a film of γ-TiAl is a plant according to the appended Drawing used. The rolling stock 17 used as the starting material is a Sheet of γ-TiAl with a thickness of 3 mm. The work rolls 4, 5 exist made of zirconium nitride. They have a diameter of 40 mm and a bale length of 140 mm. The rolling stock, which has a width of 100 mm, is conductively heated to a temperature of 900-1200 ° C. It will be a reverse rolling with a reduction of 20-25% per roll pass. The rolling speed is about 0.5 m / s. The vertical rolling force of the work roll 4, 5 on the rolling stock 17 is about 4000 kN. The γ-TiAl shows Rolling a film thickness of 70 microns with a tolerance across the width and Length of 1 micron.

Claims (15)

Verfahren zur Herstellung eines Feinblechs oder einer Folie aus einem metallischen oder intermetallischen Werkstoff durch Walzen, dadurch gekennzeichnet, dass das in der Umformzone auf eine vorgegebene Temperatur erwärmte Walzgut (17) mit nicht beheizten Arbeitswalzen (4, 5) aus keramischem Material in einer Schutzgasatmosphäre gewalzt wird.Process for producing a thin sheet or a foil from a metallic or intermetallic material by rolling, characterized in that the rolling stock (17) heated in the forming zone to a predetermined temperature is rolled with non-heated work rolls (4, 5) of ceramic material in a protective gas atmosphere becomes. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Folie eine Stärke von weniger als 200 µm, insbesondere weniger als 100 µm aufweist.A method according to claim 1, characterized in that the film has a thickness of less than 200 microns, in particular less than 100 microns. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die vorgegebene Temperatur des Walzgutes (17) in der Umformzone mindestens dem 0,3-fachen, insbesondere mindestens dem 0,4-fachen der homologen Temperatur entspricht.A method according to claim 1 or 2, characterized in that the predetermined temperature of the rolling stock (17) in the forming zone corresponds to at least 0.3 times, in particular at least 0.4 times the homologous temperature. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der metallische oder intermetallische Werkstoff eine Spröd-/Duktil-Übergangstemperatur größer als Raumtemperatur oder einen Verfestigungsexponenten größer als 0,3 aufweist.A method according to claim 1 or 2, characterized in that the metallic or intermetallic material has a brittle / ductile transition temperature greater than room temperature or a solidification exponent greater than 0.3. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass der intermetallische eineWerkstoff TiAI-Basislegierung ist.A method according to claim 4, characterized in that the intermetallic one material is TiAl base alloy. Verfahren nach Anspruch 4 und 5, dadurch gekennzeichnet, dass die Temperatur des Walzgutes (17) in der Umformzone mindestens 700°C, insbesondere mindestens 800°C beträgt. A method according to claim 4 and 5, characterized in that the temperature of the rolling stock (17) in the forming zone is at least 700 ° C, in particular at least 800 ° C. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das keramische Material, aus dem die Arbeitswalzen (4, 5) bestehen, eine Nitrid- oder Oxinitrid-Keramik, bevorzugt Zirkonnitrid oder Zirkonoxinitrid ist.Method according to one of the preceding claims, characterized in that the ceramic material constituting the work rolls (4, 5) is a nitride or oxynitride ceramic, preferably zirconium nitride or zirconium oxynitride. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das Erwärmen des Walzgutes (17) konduktiv durch Anlegen eines Stromes beiderseits der Arbeitswalzen (4, 5) erfolgt.Method according to one of the preceding claims, characterized in that the heating of the rolling stock (17) is carried out conductively by applying a current on both sides of the work rolls (4, 5). Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Walzgeschwindigkeit mehr als 0,5 m/s beträgt.Method according to one of the preceding claims, characterized in that the rolling speed is more than 0.5 m / s. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass ein Reversierwalzen durchgeführt wird.Method according to one of the preceding claims, characterized in that a reversing rollers is performed. Anlage zur Durchführung des Verfahrens nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das Walzgerüst (1) nicht beheizte Arbeitswalzen (4, 5) aus einem keramischen Material aufweist und eine Einrichtung zur Erwärmung des Walzgutes (17) in der Umformzone und eine Einrichtung zur Bildung einer Schutzgasatmosphäre zumindest in dem Bereich, in dem sich das erwärmte Walzgut (17) auf einer Temperatur befindet, bei der der metallische Werkstoff mit Gasen der Atmosphäre reagiert, vorgesehen sind.Installation for carrying out the method according to one of the preceding claims, characterized in that the rolling stand (1) unheated work rolls (4, 5) made of a ceramic material and a device for heating the rolling stock (17) in the forming zone and a device for Forming a protective gas atmosphere at least in the region in which the heated rolling stock (17) is at a temperature at which the metallic material reacts with gases of the atmosphere, are provided. Anlage nach Anspruch 11, dadurch gekennzeichnet, dass eine konduktive Einrichtung zur Erwärmung des Walzgutes (17) vorgesehen ist, deren elektrische Kontaktstellen (18, 19) beiderseits der Arbeitswalzen (4, 5) liegen.Installation according to claim 11, characterized in that a conductive means for heating the rolling stock (17) is provided, the electrical contact points (18, 19) on both sides of the work rolls (4, 5). Verwendung der nach einem der Ansprüche 1 bis 10 hergestellten Folie zur Herstellung von Leichtbaustrukturen für die Luft- und Raumfahrt.Use of the film produced according to one of Claims 1 to 10 for the manufacture of lightweight structures for the aerospace industry. Verwendung nach Anspruch 13, dadurch gekennzeichnet, dass die Leichtbaustruktur eine Verbundstruktur aus einer Mittelschicht aus Waben zwischen zwei Deckschichten ist.Use according to claim 13, characterized in that the lightweight structure is a composite structure of a middle layer of honeycombs between two cover layers. Gewalzte Folie aus γ-TiAl mit einer Stärke von weniger als 200 µm, insbesondere weniger als 100 µm.Rolled film of γ-TiAl with a thickness of less than 200 microns, in particular less than 100 μm.
EP04014179A 2004-06-17 2004-06-17 Method and apparatus to produce a thin sheet or a foil of metallic material by rolling Withdrawn EP1607147A1 (en)

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PCT/EP2005/006078 WO2005123288A1 (en) 2004-06-17 2005-06-06 Method and installation for the production of a thin metal sheet or a metallic foil by means of milling

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WO2010025327A1 (en) * 2008-08-29 2010-03-04 The Boeing Company Superplastically continuous roll forming titanium
WO2017167551A1 (en) * 2016-03-30 2017-10-05 Sms Group Gmbh Device and method for cladding a hot slab
CN108144964A (en) * 2018-02-10 2018-06-12 太原理工大学 A kind of method that pulse current auxiliary multi-roll mill rolls ultra-thin foil
CN110976511A (en) * 2019-12-20 2020-04-10 有研亿金新材料有限公司 Preparation method of platinum-silver alloy ultra-narrow thin strip
CN114367535A (en) * 2022-01-19 2022-04-19 太原理工大学 Aluminum alloy/amorphous alloy rolling composite process with phase regulated by current aid
US20230066668A1 (en) * 2021-09-01 2023-03-02 Taiyuan University Of Technology Single-sided tower-type roller system based asynchronous rolling mill for rolling ultra-thin composite strip and hydraulic system

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CN106180189B (en) * 2016-07-25 2019-07-12 宁德时代新能源科技股份有限公司 Multi-roll calendering device

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US20230066668A1 (en) * 2021-09-01 2023-03-02 Taiyuan University Of Technology Single-sided tower-type roller system based asynchronous rolling mill for rolling ultra-thin composite strip and hydraulic system
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CN114367535A (en) * 2022-01-19 2022-04-19 太原理工大学 Aluminum alloy/amorphous alloy rolling composite process with phase regulated by current aid
CN114367535B (en) * 2022-01-19 2023-09-19 太原理工大学 Aluminum alloy/amorphous alloy rolling composite process with current auxiliary phase regulation

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