EP0695808A1 - Method of producing cold-rolled metallic strips, in particular strips of stainless steel and of titanium alloys - Google Patents

Method of producing cold-rolled metallic strips, in particular strips of stainless steel and of titanium alloys Download PDF

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Publication number
EP0695808A1
EP0695808A1 EP95106192A EP95106192A EP0695808A1 EP 0695808 A1 EP0695808 A1 EP 0695808A1 EP 95106192 A EP95106192 A EP 95106192A EP 95106192 A EP95106192 A EP 95106192A EP 0695808 A1 EP0695808 A1 EP 0695808A1
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Prior art keywords
strip
descaling
cooling
ultrasonic cleaning
pickling
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EP95106192A
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German (de)
French (fr)
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EP0695808B1 (en
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Rolf Dipl.-Ing Noé
Andreas Dr. mot. Dipl.-Ing. Noé
Dieter Dipl.-Ing. Baukloh
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BWG Bergwerk und Walzwerk Maschinenbau GmbH
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BWG Bergwerk und Walzwerk Maschinenbau GmbH
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
    • C22F1/18—High-melting or refractory metals or alloys based thereon
    • C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
    • 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
    • B21B45/02—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 for lubricating, cooling, or cleaning
    • B21B45/0269—Cleaning
    • 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
    • B21B45/04—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 for de-scaling, e.g. by brushing
    • B21B45/06—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 for de-scaling, e.g. by brushing of strip material
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • 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
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • 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
    • B21B2001/228—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 skin pass rolling or temper rolling
    • 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
    • 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
    • B21B3/02—Rolling special iron alloys, e.g. stainless 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
    • Y10T29/00—Metal working
    • Y10T29/45—Scale remover or preventor
    • Y10T29/4533—Fluid impingement
    • Y10T29/4544—Liquid jet
    • 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
    • Y10T29/00—Metal working
    • Y10T29/45—Scale remover or preventor
    • Y10T29/4567—Brush type

Abstract

The method concerns prodn. of a cold-rolled strip of stainless steel and other metals, partic. Ti alloys, according to which a hot-rolled or cast strip is de-scaled by means of sandblasting and/or brushing and/or ultrasonic treatment, is then cold rolled, annealed and pickled. The appts., arranged in a single processing line, includes at least one sandblasting unit (4) and/or brushing unit (5) and/or ultrasonic unit, at least one cold-rolling unit (6), an annealing unit (7), a cooling installation (8), and a pickling unit (11).

Description

Die Erfindung betrifft ein Verfahren zum Herstellen von kaltgewalzten Stahlbändern aus nichtrostendem Stahl und Metallbändern, insbesondere aus Titanlegierungen.The invention relates to a method for producing cold-rolled steel strips from stainless steel and metal strips, in particular from titanium alloys.

Warmgewalzte Stahlbänder bzw. Warmband aus nichtrostenden Stählen bzw. Titanlegierungen sind mit einer verhältnismäßig schwer entfernbaren Zunderschicht behaftet, verfestigen stark und weisen regelmäßig eine inhomogene Bandoberfläche auf. Zum Zwecke einer leichteren Umformbarkeit im Zuge des Kaltwalzens werden solche Stahlbänder regelmäßig zunächst geglüht. Die geglühten Stahlbänder werden dann wegen der schwer entfernbaren Zunderschicht vorentzundert, bevor sie gebeizt werden. Das Strahlentzundern führt zu einer Aufrauhung und Homogenisierung der Bandoberfläche. Das Glühen, Strahlentzundern und Beizen findet in einer eigenen Behandlungslinie statt. Das so behandelte Stahlband wird zu einem Coil aufgewickelt und in einer getrennten Behandlungslinie einem Kaltwalzgerüst zugeführt. Im Zuge des Kaltwalzens wird die Banddicke auf die gewünschte Enddicke reduziert. Die Bandoberfläche wird geglättet und verdichtet. Die Festigkeit des Stahlbandes steigt stark an, so daß dessen Umformbarkeit entsprechend abnimmt. Daher müssen kaltgewalzte Stahlbänder einem weiteren Glühvorgang unterzogen werden, bei dem die Festigkeit im Wege eines Rekristallisationsglühens herabgesetzt und folglich die Umformbarkeit wieder erhöht wird. Erfolgt das Glühen nicht unter Schutzgas (Blankglühen), entsteht auf der Bandoberfläche Glühzunder, der wiederum im Wege des Beizens entfernt werden muß. Das Glühen und Beizen geschieht erneut in einer getrennten Behandlungslinie, einer sogenannten Kaltbandlinie. - Ein derartiger Fertigungsprozeß ist verhältnismäßig zeit-, energie- und personalaufwendig.Hot-rolled steel strips or hot strips made of stainless steels or titanium alloys have a scale layer that is relatively difficult to remove, solidify strongly and regularly have an inhomogeneous strip surface. For the purpose of easier formability in the course of cold rolling, such steel strips are first annealed on a regular basis. The annealed steel strips are then descaled because of the hard-to-remove scale layer before they are pickled. Radiation descaling leads to roughening and homogenization of the strip surface. Annealing, radiation descaling and pickling take place in a separate treatment line. The steel strip treated in this way is wound up into a coil and fed to a cold rolling stand in a separate treatment line. In the course of cold rolling, the strip thickness is reduced to the desired final thickness. The belt surface is smoothed and compacted. The strength of the steel strip rises sharply, so that its formability decreases accordingly. Cold-rolled steel strips must therefore be subjected to a further annealing process in which the strength is reduced by recrystallization annealing and the formability is consequently increased again. If the annealing does not take place under protective gas (bright annealing), annealing scale is formed on the strip surface, which in turn gets in the way the pickling must be removed. The annealing and pickling takes place again in a separate treatment line, a so-called cold strip line. - Such a manufacturing process is relatively time, energy and personnel consuming.

Nach einem anderen bekannten Verfahren wird das Warmband ohne Vorbehandlung kaltgewalzt und nach dem Kaltwalzen geglüht und gebeizt. In diesem Fall muß jedoch zwangsläufig eine erhöhte Oberflächenrauhigkeit in Kauf genommen werden, weil ohnehin die schwer entfernbare Zunderschicht gleichsam in die Bandoberfläche eingewalzt wird, das so in einer kontinuierlichen Behandlungslinie vorbehandelte Warmband muß dann in einem eigens dafür vorgesehenen Kaltwalzprozeß auf Endmaß fertiggewalzt werden (vgl. US-PS 5 197 179).According to another known method, the hot strip is cold rolled without pretreatment and after cold rolling it is annealed and pickled. In this case, however, an increased surface roughness must be accepted because the difficult to remove scale layer is rolled into the strip surface as it were, the hot strip pretreated in a continuous treatment line must then be finish-rolled in a specially designed cold rolling process (cf. U.S. Patent 5,197,179).

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren anzugeben, wonach sich kaltgewalzte Stahlbänder aus nichtrostendem Stahl und Metallbänder, insbesondere aus Titanlegierungen, in zeit-, energie- und personalsparender Weise mit einer äußerst glatten Oberfläche herstellen lassen, wobei die Oberfläche in Abhängigkeit von dem jeweils verwendeten Werkstoff blank oder matt ist. Außerdem soll eine zur Durchführung dieses Verfahrens besonders geeignete Vorrichtung geschaffen werden.The invention has for its object to provide a method according to which cold-rolled steel strips made of stainless steel and metal strips, in particular titanium alloys, can be produced in a time, energy and personnel-saving manner with an extremely smooth surface, the surface depending on the particular material used is bare or matt. In addition, a device that is particularly suitable for carrying out this method is to be created.

Zur Lösung dieser Aufgabe lehrt die Erfindung ein Verfahren zum Herstellen von kaltgewalzten Stahlbändern aus nichtrostendem Stahl und Metallbändern, insbesondere aus Titanlegierungen, wonach angeliefertes Warmband oder gegossenes Stahlband strahlentzundert und/oder schleifgebürstet und/oder ultraschallgereinigt, dann kaltgewalzt und anschließend geglüht sowie danach gebeizt wird. Warmband meint im Rahmen der Erfindung ein warmgewalztes Stahl- oder Metallband, welches auf Raumtemperatur abgekühlt ist. Im Rahmen der Erfindung kann das Warmband oder gegossene Stahlband oder auch ein Metallband nach dem Strahlentzundern schleifgebürstet und/oder ultraschallgereinigt und ggf. anschließend erneut strahlentzundert werden. Es besteht aber auch die Möglichkeit, daß das Warmband oder gegossene Stahlband oder auch ein Metallband vor dem Strahlentzundern schleifgebürstet und/oder ultraschallgereinigt wird. Während das Strahlentzundern für eine entzunderte homogene Bandoberfläche sorgt, resultiert aus dem Schleifbürsten eine entzunderte Bandoberfläche mit Tiefenreinigung, wobei allerdings eine Längsriefenbildung nicht ausgeschlossen ist. - Im Rahmen der Erfindung besteht ferner die Möglichkeit, das Warmband oder auch gegossene Stahlband oder ein anderes Metallband in einem Ultraschallbad zu reinigen. Eine solche Ultraschallreinigung kann auch nach dem Strahlentzundern oder Schleifbürsten erfolgen, um eine Feinreinigung zu erzielen. Ferner schließt die Erfindung nicht aus, daß zwischen dem Strahlentzundern und/oder Schleifbürsten und/oder Ultraschallreinigen und dem Fertigkaltwalzen ein chemisches Vorbeizen stattfindet, um die Oberflächenbeschaffenheit weiter zu optimieren.To achieve this object, the invention teaches a method for producing cold-rolled steel strips from stainless steel and metal strips, in particular from Titanium alloys, according to which delivered hot strip or cast steel strip is descaled and / or brushed and / or ultrasonically cleaned, then cold-rolled and then annealed and then pickled. In the context of the invention, hot strip means a hot-rolled steel or metal strip which has cooled to room temperature. Within the scope of the invention, the hot strip or cast steel strip or also a metal strip can be brushed and / or ultrasonically cleaned after beam descaling and then optionally beam descaled again. But there is also the possibility that the hot strip or cast steel strip or a metal strip is brushed and / or ultrasonically cleaned prior to beam descaling. While beam descaling ensures a descaled homogeneous belt surface, the sanding brush results in a descaled belt surface with deep cleaning, although longitudinal scoring is not excluded. - Within the scope of the invention there is also the possibility of cleaning the hot strip or cast steel strip or another metal strip in an ultrasonic bath. Such ultrasonic cleaning can also be carried out after beam descaling or grinding brushes in order to achieve a fine cleaning. Furthermore, the invention does not rule out the possibility of chemical pickling between the beam descaling and / or grinding brushes and / or ultrasonic cleaning and the finish cold rolling in order to further optimize the surface quality.

Nach Lehre der Erfindung wird das warmgewalzte oder gegossene, zunderbehaftete Stahlband vor dem Kaltwalzen lediglich strahlentzundert und/oder schleifgebürstet und/oder ultraschallgereinigt, also weder geglüht noch gebeizt. Durch das Strahlentzundern und/oder Schleifbürsten und/oder Ultraschallreinigen wird der Zunder mechanisch hinreichend entfernt. Darüber hinaus werden aber zugleich auch Unregelmäßigkeiten im Erscheinungsbild der warmgewalzten Bandoberfläche entfernt. Das weitgehend entzunderte, in seiner Oberfläche nunmehr homogene Stahlband durchläuft anschließend ein oder mehrere Kaltwalzgerüste, in denen die Banddicke bis zu 80 % verringert wird. Das Stahlband erhält ein kaltgewalztes Gefüge und wird stark verfestigt. Die Bandoberfläche wird verdichtet und geglättet. Nach dem Kaltwalzen auf Endmaß wird das Stahlband wie üblich geglüht, um die Festigkeits- und Umformeigenschaften gezielt auf die verlangten Industrie- und Lieferstandards einstellen zu können. Beim Glühen bildet sich Glühzunder auf der Bandoberfläche, der entfernt werden muß. Aus diesem Grunde wird das Stahlband nach dem Glühen wie üblich gebeizt. Nach dem Beizen ist das Stahlband vom Zunder befreit und besitzt die verlangte Oberflächenbeschaffenheit. Es handelt sich um ein auf Endmaß fertiggewalztes Stahl- oder Metallband mit gewünschten Materialeigenschaften und einer gewünschten Oberflächenstruktur. - Im Ergebnis werden im Zuge des Herstellens von kaltgewalzten Stahlbändern aus nichtrostendem Stahl aber auch von Metallbändern, insbesondere aus Titanlegierungen, nach dem erfindungsgemäßen Verfahren Energie- und Personalkosten gesenkt. Die Ausbringung wird wegen reduzierter Schrottverluste erhöht. Die Zeit zur Herstellung der fertigen Stahlbänder wird erheblich verkürzt. Diese Vorteile werden optimiert, wenn die Stahlbandherstellung nach dem erfindungsgemäßen Verfahren in lediglich einer einzigen Behandlungslinie und folglich in einem kontinuierlichen Durchlauf erfolgt.According to the teaching of the invention, the hot-rolled or cast, scaled steel strip is only beam-descaled and / or brushed and / or ultrasonically cleaned before cold rolling, that is to say neither annealed nor pickled. The scale is mechanically sufficiently removed by beam descaling and / or grinding brushes and / or ultrasonic cleaning. In addition, irregularities in the appearance of the hot-rolled strip surface are also removed. The largely descaled steel strip, which is now homogeneous in its surface, then passes through one or more cold rolling stands, in which the strip thickness is reduced by up to 80%. The steel strip is given a cold-rolled structure and is strongly consolidated. The belt surface is compacted and smoothed. After cold rolling to the final dimension, the steel strip is annealed as usual in order to be able to adjust the strength and forming properties to the required industry and delivery standards. Glowing scale forms on the strip surface during annealing, which must be removed. For this reason, the steel strip is pickled as usual after annealing. After pickling, the steel strip is freed from the scale and has the required surface quality. It is a finished steel or metal strip with the desired material properties and a desired surface structure. - As a result, energy and personnel costs are reduced in the course of the production of cold-rolled steel strips from stainless steel, but also from metal strips, in particular from titanium alloys. The spreading is due to reduced scrap losses elevated. The time to manufacture the finished steel strips is significantly reduced. These advantages are optimized if the steel strip production according to the method according to the invention takes place in only a single treatment line and consequently in a continuous pass.

Weitere erfindungswesentliche Maßnahmen sind im folgenden aufgeführt. So kann das Warmband vor dem Strahlentzundern und/oder Schleifbürsten und/oder Ultraschallreinigen streckbiegegerichtet werden. Dieses Streckbiegerichten dient zum Zunderbrechen und ermöglicht ein verhältnismäßig gleichmäßiges Strahlentzundern und/oder Schleifbürsten und/oder Ultraschallreinigen. Durch den Schleifbürstvorgang lassen sich eventuelle Oberflächenspitzen entfernen. Solche Oberflächenspitzen können nämlich, - vor allem bei ferritischen Stählen - im Kaltwalzgerüst abbrechen und zu einem unerwünschten Partikelaufbau auf den Walzen führen, wodurch deren Lebensdauer abnimmt. Durch das Ultraschallreinigen läßt sich eine Feinreinigung herbeiführen. Regelmäßig wird das kaltgewalzte Stahlband oder Metallband nach dem Glühen abgekühlt, zum Beispiel mittels Luft abgekühlt und/oder mittels Wasser abgeschreckt. Vorzugsweise wird das Stahlband oder Metallband zwischen dem Abkühlen und dem Beizen durch Streckbiegerichten und/oder Strahlentzundern und/oder Schleifbürsten und/oder Ultraschallreinigen vorentzundert, um den chemischen Beizprozeß zu unterstützen. Im Zuge des Schleifbürstens ist auch der Einsatz von Waschbürsten denkbar. Im Rahmen der Erfindung ist anstelle des Schleifbürstens auch eine Bandbehandlung mit einer Entzunderungsrolle (HMD-Rolle) oder mit einer Schleifvliesrolle denkbar. Das Ultraschallreinigen kann in einem Ultraschallbad erfolgen. Nach dem Beizen ist das Stahlband zunderfrei und weist eine äußerst glatte Oberfläche auf, die in Abhängigkeit von der Materialbeschaffenheit blank oder matt sein kann. Durch ein dem Beizen nachfolgendes Dressierwalzen bzw. Nachwalzen kann die Bandoberfläche nochmals verdichtet und weiter geglättet werden, wobei dieses Dressierwalzen bzw. Nachwalzen lediglich ein Oberflächenfinish für das bereits auf Fertigmaß kaltgewalzte Stahlband oder Metallband ist. Durch ein nachträgliches Streckbiegerichten oder Zugrecken läßt sich in der gleichen Behandlungslinie auch die Planlage des Stahlbandes oder Metallbandes gegenüber dem Dressierwalzen weiter verbessern.Further measures essential to the invention are listed below. In this way, the hot strip can be stretch-bent before beam descaling and / or grinding brushes and / or ultrasonic cleaning. This stretch bending straightening serves to break the scale and enables a relatively uniform beam descaling and / or grinding brushes and / or ultrasonic cleaning. Any surface peaks can be removed by the abrasive brushing process. Such surface peaks can break off - especially in the case of ferritic steels - in the cold rolling mill and lead to an undesirable build-up of particles on the rolls, which reduces their service life. Ultrasonic cleaning can be used for fine cleaning. The cold-rolled steel strip or metal strip is regularly cooled after annealing, for example cooled by air and / or quenched by water. The steel strip or metal strip is preferably pre-descaled between cooling and pickling by stretch bending and / or beam descaling and / or grinding brushes and / or ultrasonic cleaning in order to support the chemical pickling process. In the course of the abrasive brushing, the use of washing brushes is also conceivable. In the context of the invention, a belt treatment with a Descaling roll (HMD roll) or with a grinding fleece roll. Ultrasonic cleaning can be done in an ultrasonic bath. After pickling, the steel strip is scale-free and has an extremely smooth surface, which can be bare or matt depending on the material properties. The skin surface can be further compacted and further smoothed by a skin pass rolling or re-rolling following the pickling, this skin pass rolling or re-rolling is merely a surface finish for the steel strip or metal strip which has already been cold-rolled to the finished dimension. Subsequent stretch bending straightening or tensile stretching in the same treatment line can also further improve the flatness of the steel strip or metal strip compared to the skin pass rolling.

Nach einem Vorschlag der Erfindung mit selbständiger Bedeutung ist vorgesehen, daß zumindest das Strahlentzundern und/oder Schleifbürsten und/oder Ultraschallreinigen, Kaltwalzen, Glühen, Abkühlen und Beizen in einer einzigen Behandlungslinie vorgenommen wird. Im Rahmen der Erfindung kann aber auch das Streckbiegerichten, das Strahlentzundern und/oder Schleifbürsten und/oder Ultraschallreinigen, Kaltwalzen, Glühen, Abkühlen, Vorentzundern, Beizen und Nachwalzen bzw. Dressieren in einer einzigen kontinuierlichen Behandlungslinie vorgenommen werden.According to a proposal of the invention with independent importance, it is provided that at least the beam descaling and / or grinding brushes and / or ultrasonic cleaning, cold rolling, annealing, cooling and pickling is carried out in a single treatment line. In the context of the invention, however, stretch bending straightening, beam descaling and / or grinding brushes and / or ultrasonic cleaning, cold rolling, annealing, cooling, pre-descaling, pickling and post-rolling or skin-dressing can be carried out in a single continuous treatment line.

Gegenstand der Erfindung ist auch eine Behandlungslinie zur Durchführung des beanspruchten Verfahrens, mit zumindest einer Strahlentzunderungsvorrichtung und/oder Schleifbürstenvorrichtung, zumindest einem der Strahlentzunderungsvorrichtung und/oder Schleifbürstenvorrichtung in Bandlaufrichtung Kaltwalzgerüst, einer dem Kaltwalzgerüst nachgeordneten Glühe, einer der Glühe nachgeordneten Beize sowie mit einer Abwickelvorrichtung und einer Aufwickelvorrichtung, wobei sämtliche Aggregate in einer einzigen Linie angeordnet sind. Ferner kann der Strahlentzunderungsvorrichtung und/oder Schleifbürstenvorrichtung eine Streckbiegevorrichtung in Bandlaufrichtung vorgeordnet sein. Zweckmäßigerweise ist zwischen der Glühe und der Beize eine Abkühlvorrichtung für Luftabkühlung und Wasserabkühlung bzw. zum Abschrecken des betreffenden Stahl- oder Metallbandes angeordnet. Zwischen der Kühlvorrichtung und der Beize kann eine weitere Strahlentzunderungsvorrichtung und/oder Schleifbürstenvorrichtung angeordnet sein. Hinter der Beize ist vorzugsweise ein Dressierwalzgerüst bzw. Nachwalzgerüst angeordnet.The invention also relates to a treatment line for carrying out the claimed method, with at least one beam descaling device and / or Grinding brush device, at least one of the beam descaling device and / or grinding brush device in the strip running direction cold rolling mill, an annealing device downstream of the cold rolling mill device, a pickling device arranged after the annealing device, and with an unwinding device and a winding device, all of the units being arranged in a single line. Furthermore, the beam descaling device and / or grinding brush device can be preceded by a stretch bending device in the belt running direction. A cooling device for air cooling and water cooling or for quenching the relevant steel or metal strip is expediently arranged between the annealing and the pickling. A further beam descaling device and / or grinding brush device can be arranged between the cooling device and the pickle. A skin pass mill or finish roll stand is preferably arranged behind the pickling line.

Im folgenden wird die Erfindung anhand lediglich eines Ausführungsbeispieles näher erläutert. Die einzige Figur zeigt eine erfindungsgemäße Bandbehandlungslinie.The invention is explained in more detail below with the aid of only one exemplary embodiment. The single figure shows a belt treatment line according to the invention.

Diese Bandbehandlungslinie weist eine Abwickelvorrichtung 1 für das Warmband 2 auf. Diese Abwickelvorrichtung 1 kann sich in Bandlaufrichtung einer Streckbiegerichtvorrichtung 3 zum Zunderbrechen anschließen. Daran schließt sich eine unbedingt erforderliche Strahlentzunderungsvorrichtung 4 an, der eine Schleifbürstenvorrichtung 5 folgen kann. Zwingend erforderlich sind ebenfalls ein oder mehrere Kaltwalzgerüste 6 sowie eine Glühe 7, mit einer anschließenden Kühlvorrichtung 8, der sich wiederum eine nicht gezeigte Streckbiegevorrichtung zum Zunderbrechen - auch kombiniert mit Schleifbürsten - und eine weitere Strahlentzunderungsvorrichtung 9 anschließen können. Der wiederum kann eine Schleifbürsten- oder Waschbürstenvorrichtung 10 folgen, welche der ferner zwingend erforderlichen Beize 11 vorgeordnet sind. Die Beize 11 kann aus mehreren Beizbädern bestehen, denen Bürsten vor- und nachgeordnet sind. Gegebenenfalls folgt der Beize ein Dressierwalzzgerüst 12 und dem Dressierwalzgerüst 12 eine Streckbiegericht- oder Zugreckvorrichtung 13, bevor das behandelte Stahlband einer Aufwickelvorrichtung 14 zugeführt wird.This strip treatment line has an unwinding device 1 for the hot strip 2. This unwinding device 1 can follow a stretch bending straightening device 3 for scale breakage in the tape running direction. This is followed by an absolutely necessary beam descaling device 4, which can be followed by a grinding brush device 5. One or more cold rolling stands 6 and an annealing mill 7, with a subsequent one, are also absolutely necessary Cooling device 8, which in turn can be followed by a stretch bending device (not shown) for breaking scale - also combined with grinding brushes - and a further beam descaling device 9. This, in turn, can be followed by a grinding brush or washing brush device 10, which are arranged upstream of the stain 11 which is also absolutely necessary. The pickle 11 can consist of several pickling baths, the brushes are arranged upstream and downstream. Optionally, the pickling is followed by a skin pass mill 12 and the skin pass mill 12 is followed by a stretch bending straightening or drawing stretching device 13 before the treated steel strip is fed to a winding device 14.

Claims (15)

Verfahren zum Herstellen von kaltgewalzten Stahlbändern aus nichtrostendem Stahl und Metallbändern, insbesondere aus Titanlegierungen, wonach Warmband oder gegossenes Stahlband strahlentzundert und/oder schleifgebürstet und/oder ultraschallgereinigt, dann kaltgewalzt und anschließend geglüht sowie danach gebeizt wird.Process for producing cold-rolled steel strips from stainless steel and metal strips, in particular from titanium alloys, according to which hot strip or cast steel strip is beam-descaled and / or brushed and / or ultrasonically cleaned, then cold-rolled and then annealed and then pickled. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Warmband nach dem Strahlentzundern schleifgebürstet und/oder ultraschallgereinigt wird.A method according to claim 1, characterized in that the hot strip is abraded after the beam descaling and / or ultrasonically cleaned. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Warmband nach dem Strahlentzundern und Schleifbürsten erneut strahlentzundert wird.A method according to claim 1 or 2, characterized in that the hot strip is descaled again after the beam descaling and grinding brushes. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Warmband vor dem Strahlentzundern schleifgebürstet und/oder ultraschallgereinigt wird.A method according to claim 1, characterized in that the hot strip is brushed and / or ultrasonically cleaned prior to beam descaling. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Warmband vor dem Strahlentzundern und/oder Schleifbürsten un/oder Ultraschallreinigen streckbiegegerichtet wird.Method according to one of claims 1 to 4, characterized in that the hot strip is stretch-bent before the radiation descaling and / or grinding brushes and / or ultrasonic cleaning. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das kaltgewalzte Stahlband oder Metallband nach dem Glühen abkühlt wird, zum Beispiel mittels Luft abgekühlt und/oder mittels Wasser abgeschreckt wird.Method according to one of claims 1 to 5, characterized in that the cold-rolled steel strip or metal strip is cooled after the annealing, for example cooled by air and / or quenched by water. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das Stahlband oder Metallband zwischen dem Abkühlen und dem Beizen durch Streckbiegerichten und/oder Strahlentzundern und/oder Schleifbürsten und/oder Ultraschallreinigen vorentzundert wird.Method according to one of claims 1 to 6, characterized in that the steel strip or metal strip is pre-descaled between cooling and pickling by stretch bending straightening and / or beam descaling and / or grinding brushes and / or ultrasonic cleaning. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß das Stahlband oder Metallband nach dem Beizen nachgewalzt bzw. dressiert wird.Method according to one of claims 1 to 7, characterized in that the steel strip or metal strip is re-rolled or dressed after pickling. Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß zumindest das Strahlentzundern und/oder Schleifbürsten und/oder Ultralschallreinigen, Kaltwalzen, Glühen, Abkühlen und Beizen in einer einzigen Behandlungslinie vorgenommen werden.Method according to one of claims 1 to 8, characterized in that at least the beam descaling and / or grinding brushes and / or ultrasonic cleaning, cold rolling, annealing, cooling and pickling are carried out in a single treatment line. Verfahren nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß das Streckbiegerichten, das Strahlentzundern und/oder Schleifbürsten und/oder Ultraschallreinigen, Kaltwalzen, Glühen, Abkühlen, Vorentzundern, Beizen und Nachwalzen bzw. Dressieren in einer einzigen kontinuierlichen Behandlungslinie vorgenommen werden.Method according to one of claims 1 to 9, characterized in that the stretch bending straightening, the beam descaling and / or grinding brushes and / or ultrasonic cleaning, cold rolling, annealing, cooling, pre-descaling, pickling and post-rolling or skin-dressing are carried out in a single continuous treatment line. Behandlungslinie zum Durchführen des Verfahrens nach Anspruch 1 bis 10, mit zumindest einer Strahlentzunderungsvorrichtung (4) und/oder Schleifbürstenvorrichtung und/oder Ultraschallreinigungsvorrichtung, zumindest einem der Strahlentzunderungsvorrichtung (4) und/oder Schleifbürstenvorrichtung und/oder Ultrascchallreinigungsvorrichtung in Bandlaufrichtung nachgeordneten Kaltwalzgerüst (6), einer dem Kaltwalzgerüst (6) nachgeordneten Glühe (7), einer der Glühe (7) nachgeordneten Kühlvorrichtung (8), einer der Kühlvorrichtung (8) nachgeordneten Beize (11) sowie mit einer Abwickelvorrichtung (1) und einer Aufwickelvorrichtung (14), wobei sämtliche Aggregate in einer einzigen Linie angeordnet sind.Treatment line for carrying out the method according to claim 1 to 10, with at least one beam descaling device (4) and / or grinding brush device and / or ultrasonic cleaning device, at least one cold rolling mill downstream of the beam descaling device (4) and / or grinding brush device and / or ultrasonic cleaning device (6), an annealing unit (7) arranged downstream of the cold rolling stand (6), a cooling device (8) arranged downstream of the annealing unit (7), a pickling line (11) arranged downstream of the cooling unit (8), and with an unwinding unit (1) and a winding unit ( 14), with all units being arranged in a single line. Behandlungslinie nach Anspruch 11, dadurch gekennzeichnet, daß der Strahlentzunderungsvorrichtung (4) und/oder der Schleifbürstenvorrichtung und/oder der Ultraschallreinigungsvorrichtung eine Streckbiegevorrichtung (3) vorgeordnet ist.Treatment line according to claim 11, characterized in that a stretch bending device (3) is arranged upstream of the beam descaling device (4) and / or the grinding brush device and / or the ultrasonic cleaning device. Behandlungslinie nach Anspruch 11 oder 12, dadurch gekennzeichnet, daß die zwischen der Glühe (6) und der Beize (11) angeordnete Kühlvorrichtung (8) für Luftabkühlung und/oder Wasserabkühlung eingerichtet ist.Treatment line according to claim 11 or 12, characterized in that the cooling device (8) arranged between the annealer (6) and the pickle (11) is designed for air cooling and / or water cooling. Behandlungslinie nach einem der Ansprüche 11 bis 13, dadurch gekennzeichnet, daß zwischen der Kühlvorrichtung (8) und der Beize (11) eine weitere Strahlentzunderungsvorrichtung (9) und/oder Schleifbürstenvorrichtung (10) und/oder Ultraschallreinigungsvorrichtung angeordnet ist.Treatment line according to one of claims 11 to 13, characterized in that a further beam descaling device (9) and / or grinding brush device (10) and / or ultrasonic cleaning device is arranged between the cooling device (8) and the pickle (11). Behandlungslinie nach einem der Ansprüche 11 bis 14, dadurch gekennzeichnet, daß hinter der Beize (11) ein Nachwalzgerüst bzw. Dressierwalzgerüst (12) angeordnet ist.Treatment line according to one of claims 11 to 14, characterized in that a re-rolling stand or skin pass rolling stand (12) is arranged behind the pickling line (11).
EP95106192A 1994-07-07 1995-04-26 Method of producing cold-rolled metallic strips, in particular strips of stainless steel and of titanium alloys Revoked EP0695808B1 (en)

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Cited By (14)

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EP0706840A3 (en) * 1994-10-14 1996-08-07 Mannesmann Ag Method and device for manufacturing cold rolled stainless steel from hot rolled strip
EP0770707A1 (en) * 1995-09-01 1997-05-02 Keramchemie GmbH Process for producing cold-rolled strip continuously
EP0769333A1 (en) * 1995-10-19 1997-04-23 Usinor Sacilor Method for continuously producing, in a line, rolled sheet metal strip of stainless steel with improved surface condition
FR2740061A1 (en) * 1995-10-19 1997-04-25 Ugine Sa PROCESS FOR THE CONTINUOUS LINE PREPARATION OF A LAMINATED STAINLESS STEEL STRIP WITH AN IMPROVED SURFACE CONDITION
EP0923420A4 (en) * 1996-12-26 1999-06-23
EP0923420A1 (en) * 1996-12-26 1999-06-23 J & L Specialty Steel, Inc. Brushing process for corrosion and oxidation resistance
EP0914878A1 (en) * 1997-11-08 1999-05-12 Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh Process and treatment line for producing metal strips having descaled surfaces
FR2775205A1 (en) * 1998-02-25 1999-08-27 Usinor Method and installation for producing cold-rolled stainless steel strip
WO1999043451A1 (en) * 1998-02-25 1999-09-02 Ugine S.A. Installation for making cold-rolled stainless steel bands
CN103464459A (en) * 2013-08-29 2013-12-25 沈阳和世泰通用钛业有限公司 Method for manufacturing titanium alloy U-shaped material
WO2017001283A3 (en) * 2015-06-29 2017-03-16 Andritz Ag Device and method for producing a galvanized steel strip
WO2018096382A1 (en) 2016-11-23 2018-05-31 Aperam Method for laser stripping a moving metal product and plant for the execution thereof
US11548046B2 (en) 2016-11-23 2023-01-10 Aperam Method for laser stripping a moving metal product and plant for the execution thereof
WO2023007221A1 (en) 2021-07-28 2023-02-02 Aperam Method and apparatus for stripping an oxide layer from a metal product

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CN1122264A (en) 1996-05-15
FI953286A (en) 1996-01-08
JPH08164412A (en) 1996-06-25
TW303313B (en) 1997-04-21
AU2489695A (en) 1996-01-18
US5554235A (en) 1996-09-10
TR199500824A2 (en) 1996-06-21
MY118448A (en) 2004-11-30
DE59503319D1 (en) 1998-10-01
ES2121251T3 (en) 1998-11-16
UA40606C2 (en) 2001-08-15
ATE170225T1 (en) 1998-09-15
CA2150396C (en) 2001-11-20
KR960003830A (en) 1996-02-23
AU688042B2 (en) 1998-03-05
DE4423664A1 (en) 1996-05-15
BR9503097A (en) 1997-09-23
ZA954065B (en) 1996-01-19
CA2150396A1 (en) 1996-01-08
FI953286A0 (en) 1995-07-03
RU2138341C1 (en) 1999-09-27
EP0695808B1 (en) 1998-08-26
RU95110888A (en) 1997-05-20
KR100313619B1 (en) 2001-12-28

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