EP0914878B1 - Process and treatment line for producing metal strips having descaled surfaces - Google Patents

Process and treatment line for producing metal strips having descaled surfaces Download PDF

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Publication number
EP0914878B1
EP0914878B1 EP98115598A EP98115598A EP0914878B1 EP 0914878 B1 EP0914878 B1 EP 0914878B1 EP 98115598 A EP98115598 A EP 98115598A EP 98115598 A EP98115598 A EP 98115598A EP 0914878 B1 EP0914878 B1 EP 0914878B1
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EP
European Patent Office
Prior art keywords
strip
descaling
annealing
stretcher
treatment line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP98115598A
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German (de)
French (fr)
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EP0914878A1 (en
Inventor
Rolf Dipl. Ing. Noé
Andreas Dr. Dipl. Ing. Noé
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BWG Bergwerk und Walzwerk Maschinenbau GmbH
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BWG Bergwerk und Walzwerk Maschinenbau GmbH
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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
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G3/00—Apparatus for cleaning or pickling metallic material
    • C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
    • C23G3/027—Associated apparatus, e.g. for pretreating or after-treating
    • C23G3/028—Associated apparatus, e.g. for pretreating or after-treating for thermal or mechanical pretreatment
    • 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
    • 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
    • C21D8/0278—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular surface treatment
    • 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
    • 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
    • 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
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0242—Flattening; Dressing; Flexing

Definitions

  • the invention relates to a method for producing rolled or cast metal strips, especially steel strips made of stainless steel and titanium alloys, with a descaled Surface, after which the metal strip in question is annealed, for mechanical pre-descaling and for chemical and / or electrolytic descaling is stained.
  • Such a treatment method is known, according to which the metal strip in question in the course of producing a descaled strip surface first annealed, then for mechanical Pre-descaling straightened and then is blasted and / or brushed, and then to chemical descaling to be pickled so that finally a metal or steel band with a clean one Belt surface is available.
  • the glow serves in the general for the elimination of work hardening. -
  • the Blasting and / or brushing the metal strips is proportional in terms of time and plant technology investment-intensive. The necessary ones Blasting systems and brush machines cause considerable Maintenance and operating costs.
  • EP 0 695 808 A1 discloses one of these Method or such a device, according to the preamble of claim 1 or 2.
  • the invention has for its object a method for Manufacture of rolled or cast metal strips, especially steel strips made of stainless steel and titanium alloys, the embodiment described above create what the descaling in cost-reducing Way is optimized. In addition, one should be carried out suitable band line can be created using this method.
  • the invention solves this problem with a generic one Procedure in that the stretch bending straightening immediately before annealing and pickling immediately after annealing be made. Immediately means within the scope of the invention without the interposition of further treatment measures. - Surprisingly, the mechanical pre-descaling significantly better if the stretch bending judging before the glow takes place. It has been found that the metal straps and especially stainless steel straps so well be pre-descaled that they are without blasting and / or brushing Driven at maximum speed in the belt line can and still the strip surface after pickling is perfectly clean. In this respect, according to the teaching of Invention optimized descaling throughout Descaling process rationalized in a cost-saving manner becomes.
  • the one for performing the invention Band treatment line particularly suitable for the process with at least one decoiler, one Stretch bending straightening device for mechanical pre-descaling, a glow, a chemical and / or electrolytic pickle Post-descaling and a take-up reel characterized in that the stretch bending straightening device in Direction of strip running immediately before the annealing and pickling is located immediately behind the glow. Right away means in this context without the interposition of others Belt processing units.
  • a belt treatment line according to the invention without a blasting system and brushing machines is also advantageous when except hot-rolled and also cold-rolled strips annealed and pickled Need to become. Because usually when switching the strip treatment line from hot strip to cold strip the otherwise necessary blasting system is cleaned, thus no blasting material the smooth surface of the cold strips can damage. This also applies to different roles.
  • the associated production downtimes are eliminated in the belt treatment line according to the invention.
  • a tape store can be provided on the inlet side in front of and / or behind the stretch bending straightening device be arranged. By using such tape storage standstill marks are avoided in the area The stretch bending rolls can occur if the one in question Metal band in the infeed area for the purpose of changing the waistband or welding a subsequent metal strip is stopped. Because the tape storage allows you continuous belt pass. The can before Straightening straightening device arranged inlet storage so be chosen small that the stretch bending straightening device during the belt standstill in the inlet only in crawl mode continues. Under this condition, tape running and marking problems are negligible.
  • the stain can be a skin pass mill and / or a stretch bending straightener may be subordinate to in relation for flatness, surface roughness and gloss each to be able to achieve the required properties.
  • the skin pass mill can be equipped with textured rollers if patterned or defined belt surfaces are desired. Otherwise there is the possibility of the metal strip in question after descaling by stretch bending straightening or to split and / or trim before winding.
  • the single figure shows a schematic representation a strip treatment line with a decoiler 1, one Welding machine 2, a bend straightening device 3, an annealing furnace 4, a pickling 5 and a take-up reel 6.
  • the stretch bending straightening device 3 is in the tape running direction immediately before the glow 4 and the Pickling 5 arranged immediately behind the glow 4.
  • Tape storage 7, 8 may be arranged, which is only indicated is.
  • a tape storage 9 is located regularly also behind the stain 5.

Description

Die Erfindung betrifft ein Verfahren zum Herstellen von gewalzten oder gegossenen Metallbändern, insbesondere Stahlbändern aus Edelstahl- und Titanlegierungen, mit einer entzunderten Oberfläche, wonach das betreffende Metallband geglüht, zum mechanischen Vorentzundern streckbiegegerichtet und zum chemischen und/oder elektrolytischen Nachentzundern gebeizt wird. - Im Rahmen der Erfindung meint gewalzte Metallbänder bzw. Stahlbänder sowohl warmgewalzte als auch kaltgewalzte Bänder.The invention relates to a method for producing rolled or cast metal strips, especially steel strips made of stainless steel and titanium alloys, with a descaled Surface, after which the metal strip in question is annealed, for mechanical pre-descaling and for chemical and / or electrolytic descaling is stained. - In the context of the invention means rolled metal strips or steel strips both hot rolled as well cold rolled strips.

Es ist ein derartiges Behandlungsverfahren bekannt, wonach das betreffende Metallband im Zuge der Herstellung einer entzunderten Bandoberfläche zunächst geglüht, dann zur mechanischen Vorentzunderung streckbiegegerichtet und anschließend gestrahlt und/oder gebürstet wird, um dann zum chemischen Nachentzundern gebeizt zu werden, so daß schließlich ein Metall- bzw. Stahlband mit einer sauberen Bandoberfläche zur Verfügung steht. Das Glühen dient im allgemeinen zur Beseitigung von Kaltverfestigungen. - Das Strahlen und/oder Bürsten der Metallbänder ist verhältnismäßig zeit- und in anlagentechnischer Hinsicht investitionsaufwendig. Die dafür erforderlichen Strahlanlagen und Bürstenmaschinen verursachen erhebliche Instandhaltungs- und Betriebskosten.Such a treatment method is known, according to which the metal strip in question in the course of producing a descaled strip surface first annealed, then for mechanical Pre-descaling straightened and then is blasted and / or brushed, and then to chemical descaling to be pickled so that finally a metal or steel band with a clean one Belt surface is available. The glow serves in the general for the elimination of work hardening. - The Blasting and / or brushing the metal strips is proportional in terms of time and plant technology investment-intensive. The necessary ones Blasting systems and brush machines cause considerable Maintenance and operating costs.

Bei einem Behandlungsverfahren der eingangs angegebenen Ausgestaltung wird ein Warmband in Bandlaufrichtung einer Streckbiegerichtvorrichtung zum Zunderbrechen unterworfen. Daran schließt sich eine unbedingt erforderliche Strahlentzunderungsvorrichtung an, der eine Schleifbürstenvorrichtung folgen kann. Zwingend sind darüber hinaus ein oder mehrere Kaltwalzgerüste sowie eine Glühe mit einer anschließenden Kühlvorrichtung, der sich wiederum eine Streckbiegevorrichtung zum Zunderbrechen und eine weitere Strahlentzunderungsvorrichtung anschließen können. Hierauf kann eine Schleifbürsten- oder Waschbürstenvorrichtung folgen, welcher der ferner zwingend erforderlichen Beize vorgeordnet ist. Hierdurch will man erreichen, kaltgewalzte Stahlbänder aus nichtrostendem Stahl und Metallbänder insbesondere aus Titanlegierungen mit einer äußerst glatten Oberfläche herstellen zu können, wobei die Oberfläche in Abhängigkeit von dem jeweils verwendeten Werkstoff blank oder matt sein soll. EP 0 695 808 A1 offenbart ein solches Verfahren bzw. eine solche Vorrichtung, entsprechend dem Oberbegriff des Anspruchs 1 bzw. 2.In the case of a treatment procedure of the type mentioned at the beginning Design is a hot strip in the strip running direction Stretch bending straightening device subjected to scaling. This is followed by an absolutely necessary beam descaling device on a sanding brush device can follow. Beyond that, an or is mandatory several cold rolling stands as well as an annealing line with a subsequent one Cooling device, which in turn is a Stretch bending device for scaling and another Beam descaling device can connect. On that can be followed by an abrasive brush or wash brush device which precedes the further mandatory stain is. This is how you want to achieve cold rolled Steel strips made of stainless steel and metal strips in particular made of titanium alloys with an extremely smooth To be able to produce surface, the surface in Depending on the material used, bare or should be matt. EP 0 695 808 A1 discloses one of these Method or such a device, according to the preamble of claim 1 or 2.

Darüber hinaus ist ein Verfahren und eine Vorrichtung zum Entzundern und Planieren von Blechbändern bekannt. Dabei durchläuft das Blechband im gespannten Zustand mehrere Bereiche von Wechselbiegungen mit bestimmtem Streckgrad, und zwar kontinuierlich (vgl. DE 23 50 503 B1).In addition, a method and an apparatus for Descaling and leveling of metal strips known. there the sheet metal strip passes through several in the tensioned state Areas of alternate bends with a certain degree of stretch, namely continuously (cf. DE 23 50 503 B1).

Schließlich wird bei einem Verfahren zum Herstellen von kaltgewalzten Stahlbändern, insbesondere Edelstahlbändern, so vorgegangen, das Warmband in einem kontinuierlichen Behandlungsprozeß streckbiegegerichtet, strahlentzundert und/oder gebürstet, gebeizt, auf Bandenddicke kaltgewalzt, unter Schutzgas geglüht, dressiert und schließlich in Planlage gerichtet wird (vgl. DE 195 05 324 A1). Sämtliche vorgenannten Dokumente zum Stand der Technik erfordern erheblichen anlagentechnischen Aufwand, wie dies zuvor bereits skizziert wurde. - Hier will die Erfindung insgesamt Abhilfe schaffen.Finally, in a method of manufacturing cold-rolled steel strips, especially stainless steel strips, so proceeded the hot strip in a continuous Treatment process straightened, beam descaled and / or brushed, pickled, cold rolled to final strip thickness, annealed under protective gas, trained and finally in Flatness is directed (cf. DE 195 05 324 A1). All of the aforementioned documents relating to the prior art require considerable plant engineering effort like this has previously been outlined. - Here is the invention overall remedy.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Herstellen von gewalzten oder gegossenen Metallbändern, insbesondere Stahlbändern aus Edelstahl- und Titanlegierungen, der eingangs beschriebenen Ausführungsform zu schaffen, wonach die Entzunderung in kostenreduzierender Weise optimiert wird. Außerdem soll eine zur Durchführung dieses Verfahrens geeignete Bandlinie geschaffen werden.The invention has for its object a method for Manufacture of rolled or cast metal strips, especially steel strips made of stainless steel and titanium alloys, the embodiment described above create what the descaling in cost-reducing Way is optimized. In addition, one should be carried out suitable band line can be created using this method.

Diese Aufgabe löst die Erfindung bei einem gattungsgemäßen Verfahren dadurch, daß das Streckbiegerichten unmittelbar vor dem Glühen und das Beizen unmittelbar nach dem Glühen vorgenommen werden. Unmittelbar meint im Rahmen der Erfindung ohne Zwischenschaltung von weiteren Behandlungsmaßnahmen. - Überraschenderweise ist die mechanische Vorentzunderung signifikant besser, wenn das Streckbiegerichten vor dem Glühen stattfindet. Es hat sich herausgestellt, daß die Metallbänder und insbesondere Edelstahlbänder so gut vorentzundert werden, daß sie ohne Strahlen und/oder Bürsten mit maximaler Geschwindigkeit in der Bandlinie gefahren werden können und dennoch die Bandfläche nach dem Beizen einwandfrei sauber ist. Insoweit wird nach Lehre der Erfindung die Entzunderung optimiert, während der gesamte Entzunderungsprozeß in kostensparender Weise rationalisiert wird. Denn nach Lehre der Erfindung kann nunmehr auf das Strahlen und/oder Bürsten der Metall- bzw. Stahlbänder und folglich auch insoweit auf die sonst erforderlichen anlagentechnischen Einrichtungen in der Bandbehandlungslinie verzichtet werden. Daher ist die zur Durchführung des erfindungsgemäßen Verfahrens besonders geeignete Bandbehandlungslinie mit zumindest einem Abwickelhaspel, einer Streckbiegerichteinrichtung zum mechanischen Vorentzundern, einer Glühe, einer Beize zum chemischen und/oder elektrolytischen Nachentzundern und einem Aufwickelhaspel dadurch gekennzeichnet, daß die Streckbiegerichtvorrichtung in Bandlaufrichtung unmittelbar vor der Glühe und die Beize unmittelbar hinter der Glühe angeordnet ist. Unmittelbar meint in diesem Zusammenhang ohne Zwischenschaltung von anderen Bandbehandlungsaggregaten. Das schließt folglich nicht aus, daß in Bandlaufrichtung vor und/oder hinter der Streckbiegerichtvorrichtung ein Bandspeicher angeordnet sein kann. - Im Rahmen der Erfindung werden jedenfalls die Investitionskosten von neu zu installierenden Bandbehandlungslinien wegen der nicht länger erforderlichen Strahlanlagen und Bürstmaschinen erheblich reduziert. Das gilt insoweit auch für die Instandhaltungs- und Betriebskosten. Eine erfindungsgemäße Bandbehandlungslinie ohne Strahlanlage und Bürstmaschinen ist auch dann vorteilhaft, wenn außer warmgewalzten auch kaltgewalzte Bänder geglüht und gebeizt werden müssen. Denn üblicherweise muß bei der Umstellung der Bandbehandlungslinie von Warmband auf Kaltband die sonst erforderliche Strahlanlage gereinigt werden, damit kein Strahlgut die glatte Oberfläche der Kaltbänder beschädigen kann. Das gilt auch für verschiedene Rollen. Die damit verbundenen Produktionsausfallzeiten entfallen bei der erfindungsgemäßen Bandbehandlungslinie. - Sofern einlaufseitig Bandspeicher vorgesehen sind, kann ein Bandspeicher vor und/oder hinter der Streckbiegerichtvorrichtung angeordnet sein. Durch den Einsatz solcher Bandspeicher werden Stillstandsmarkierungen vermieden, die im Bereich der Streckbiegerollen auftreten können, wenn das betreffende Metallband im Einlaufbereich zum Zwecke des Bundwechsels oder Anschweißens eines nachfolgenden Metallbandes angehalten wird. Denn die Bandspeicher ermöglichen einen kontinuierlichen Banddurchlauf. Dabei kann der vor der Streckbiegerichtvorrichtung angeordnete Einlaufspeicher so klein gewählt werden, daß die Streckbiegerichtvorrichtung während des Bandstillstandes im Einlauf nur im Kriechbetrieb weiterläuft. Unter dieser Voraussetzung sind Bandlauf- und Markierungsprobleme vernachlässigbar.The invention solves this problem with a generic one Procedure in that the stretch bending straightening immediately before annealing and pickling immediately after annealing be made. Immediately means within the scope of the invention without the interposition of further treatment measures. - Surprisingly, the mechanical pre-descaling significantly better if the stretch bending judging before the glow takes place. It has been found that the metal straps and especially stainless steel straps so well be pre-descaled that they are without blasting and / or brushing Driven at maximum speed in the belt line can and still the strip surface after pickling is perfectly clean. In this respect, according to the teaching of Invention optimized descaling throughout Descaling process rationalized in a cost-saving manner becomes. Because according to the teaching of the invention can now on Blasting and / or brushing the metal or steel strips and consequently also to the extent necessary on the other technical equipment Facilities in the belt treatment line to be dispensed with. Therefore, the one for performing the invention Band treatment line particularly suitable for the process with at least one decoiler, one Stretch bending straightening device for mechanical pre-descaling, a glow, a chemical and / or electrolytic pickle Post-descaling and a take-up reel characterized in that the stretch bending straightening device in Direction of strip running immediately before the annealing and pickling is located immediately behind the glow. Right away means in this context without the interposition of others Belt processing units. So that concludes not from that in the tape running direction before and / or behind the Stretch bending straightening device arranged a tape store can be. - In any case, within the scope of the invention Investment costs of new belt treatment lines to be installed because of the blasting systems no longer required and brushing machines significantly reduced. That applies in this respect also for the maintenance and operating costs. A belt treatment line according to the invention without a blasting system and brushing machines is also advantageous when except hot-rolled and also cold-rolled strips annealed and pickled Need to become. Because usually when switching the strip treatment line from hot strip to cold strip the otherwise necessary blasting system is cleaned, thus no blasting material the smooth surface of the cold strips can damage. This also applies to different roles. The associated production downtimes are eliminated in the belt treatment line according to the invention. - Provided A tape store can be provided on the inlet side in front of and / or behind the stretch bending straightening device be arranged. By using such tape storage standstill marks are avoided in the area The stretch bending rolls can occur if the one in question Metal band in the infeed area for the purpose of changing the waistband or welding a subsequent metal strip is stopped. Because the tape storage allows you continuous belt pass. The can before Straightening straightening device arranged inlet storage so be chosen small that the stretch bending straightening device during the belt standstill in the inlet only in crawl mode continues. Under this condition, tape running and marking problems are negligible.

Im Rahmen der Erfindung läßt sich allerdings dann vor und/oder hinter der Glühe bzw. dem Glühofen eine Strahlmaschine und/oder Bürstmaschine anordnen, wenn besonders schwer entzunderbare Metallbänder nicht nur im Wege des Streckbiegerichtens, sondern eben auch im Wege des Strahlens und/oder Bürstens mechanisch vorentzundert werden müssen. Im übrigen kann der Beize ein Dressiergerüst und/oder eine Streckbiegerichtanlage nachgeordnet sein, um in Bezug auf Planheit, Oberflächenrauhigkeit und Glanz die jeweils verlangten Eigenschaften erreichen zu können. Das Dressiergerüst kann mit texturierten Walzen ausgerüstet sein, wenn gemusterte bzw. definierte Bandoberflächen erwünscht sind. Im übrigen besteht die Möglichkeit, das betreffende Metallband nach dem Entzundern im Wege des Streckbiegerichtens oder vor dem Aufwickeln zu spalten und/oder zu besäumen.However, within the scope of the invention and / or a blasting machine behind the glow or the annealing furnace and / or arrange brushing machine if special metal tapes difficult to descale not only in the way of Stretch bending, but also by blasting and / or brushing must be mechanically pre-descaled. Otherwise, the stain can be a skin pass mill and / or a stretch bending straightener may be subordinate to in relation for flatness, surface roughness and gloss each to be able to achieve the required properties. The skin pass mill can be equipped with textured rollers if patterned or defined belt surfaces are desired. Otherwise there is the possibility of the metal strip in question after descaling by stretch bending straightening or to split and / or trim before winding.

Im folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert. Die einzige Figur zeigt in schematischer Darstellung eine Bandbehandlungslinie mit einem Abwickelhaspel 1, einer Schweißmaschine 2, einer Streckbiegerichtvorrichtung 3, einer als Glühofen ausgeführten Glühe 4, einer Beize 5 und einem Aufwickelhaspel 6. Die Streckbiegerichtvorrichtung 3 ist in Bandlaufrichtung unmittelbar vor der Glühe 4 und die Beize 5 unmittelbar hinter der Glühe 4 angeordnet. Außerdem können vor und hinter der Streckbiegerichtvorrichtung 3 Bandspeicher 7, 8 angeordnet sein, welches lediglich angedeutet ist. Ein Bandspeicher 9 befindet sich regelmäßig auch hinter der Beize 5.In the following, the invention is based on only one Exemplary embodiment illustrating the drawing. The single figure shows a schematic representation a strip treatment line with a decoiler 1, one Welding machine 2, a bend straightening device 3, an annealing furnace 4, a pickling 5 and a take-up reel 6. The stretch bending straightening device 3 is in the tape running direction immediately before the glow 4 and the Pickling 5 arranged immediately behind the glow 4. Moreover can in front of and behind the stretch bending straightening device 3 Tape storage 7, 8 may be arranged, which is only indicated is. A tape storage 9 is located regularly also behind the stain 5.

Claims (3)

  1. A process for producing rolled or cast metal strip, particularly steel strip comprising special steel alloys and titanium alloys, having a descaled strip surface, wherein the metal strip concerned is annealed, is stretcher-and-roller levelled for preliminary descaling and is pickled for secondary descaling, characterised in that stretcher-and-roller levelling is effected directly before annealing and pickling is effected directly after annealing.
  2. A strip treatment line for carrying out the process according to claim 1, comprising at least one uncoiler, a stretcher-and-roller levelling apparatus for preliminary descaling, an annealing installation, a pickling installation for secondary descaling, and a coiler, characterised in that in the direction of strip travel the stretcher-and-roller levelling apparatus (3) is disposed directly in front of the annealing installation (4) and the pickling installation (5) is disposed directly after the annealing installation (4).
  3. A strip treatment line according to claim 2, comprising strip accumulators, characterised in that a strip accumulator (7, 8) is disposed before and/or after the stretcher-and-roller levelling apparatus (3) in the direction of strip travel.
EP98115598A 1997-11-08 1998-08-19 Process and treatment line for producing metal strips having descaled surfaces Expired - Lifetime EP0914878B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19749466 1997-11-08
DE19749466A DE19749466C1 (en) 1997-11-08 1997-11-08 Production of rolled or cast metal strip with descaled surface, especially strip consisting of special steel and titanium alloys

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EP0914878A1 EP0914878A1 (en) 1999-05-12
EP0914878B1 true EP0914878B1 (en) 2001-11-07

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US (1) US6089063A (en)
EP (1) EP0914878B1 (en)
DE (1) DE19749466C1 (en)
ES (1) ES2163833T3 (en)

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Publication number Priority date Publication date Assignee Title
DE19917561C1 (en) * 1999-04-19 2000-11-30 Sundwig Gmbh Strip treatment line for metal strips, especially for high-strength stainless steel strips
US6732561B2 (en) * 2002-09-23 2004-05-11 The Material Works, Ltd. Method and apparatus for leveling and conditioning sheet metal
US6814815B2 (en) 2003-04-07 2004-11-09 The Material Works, Ltd. Method of removing scale and inhibiting oxidation in processed sheet metal
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EP0914878A1 (en) 1999-05-12
DE19749466C1 (en) 1998-12-24
ES2163833T3 (en) 2002-02-01

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