EP0706840A2 - Procédé et dispositif pour fabriquer une bande d'acier inoxydable laminée à froid, cette bande obtenue d'une bande laminée à chaud - Google Patents

Procédé et dispositif pour fabriquer une bande d'acier inoxydable laminée à froid, cette bande obtenue d'une bande laminée à chaud Download PDF

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Publication number
EP0706840A2
EP0706840A2 EP95250250A EP95250250A EP0706840A2 EP 0706840 A2 EP0706840 A2 EP 0706840A2 EP 95250250 A EP95250250 A EP 95250250A EP 95250250 A EP95250250 A EP 95250250A EP 0706840 A2 EP0706840 A2 EP 0706840A2
Authority
EP
European Patent Office
Prior art keywords
strip
stainless steel
descaling
pickling
steel cold
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.)
Withdrawn
Application number
EP95250250A
Other languages
German (de)
English (en)
Other versions
EP0706840A3 (fr
Inventor
Franz Ing. Pempera
Richard C. Schweitzer
Alan Robert Waigand
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of EP0706840A2 publication Critical patent/EP0706840A2/fr
Publication of EP0706840A3 publication Critical patent/EP0706840A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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
    • B21B1/24—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 continuous or semi-continuous process
    • B21B1/28—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 continuous or semi-continuous process by cold-rolling, e.g. Steckel cold mill
    • 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
    • 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

Definitions

  • the invention relates to a method and a device for producing stainless steel cold strip from hot-rolled pre-strip in a strip treatment line consisting of descaling, annealing and pickling devices and at least one roll stand for reducing the deformation of the strip in one or more roll passes to the desired finished dimension of the strip before it is wound up into a covenant.
  • the hot-rolled preliminary strip is usually first blasted as possible without scaling after annealing in a continuous annealing furnace and then pickled.
  • the hot-rolled sliver is chemically treated with mixed acid, which consists for example of HNO3 and HF. Only after the annealing and pickling process has been carried out is the hot-rolled pre-strip rolled down to the desired thickness in reversing roll stands in up to 13 passes.
  • the hot-rolled pre-strip is subjected to a different annealing and pickling process than the cold strip after it has been reduced to finished strip thickness.
  • the reasons are as follows: Depending on the use of the annealing furnace and depending on the material quality of the stainless steel pre-strip, scale deposits are produced on the pre-strip, which is between 20 and 100 g / running meter strip. On the other hand, after the annealing process, a scale coating can be found on the cold strip, which is also between 6 and 12 g / running meter, depending on the quality of the material.
  • the high scale layer of the hot-rolled pre-strip after annealing only allows economical pickling if mechanical pre-descaling takes place after the pre-strip has been annealed.
  • stretch-bending straightening units and / or so-called shot blasters are usually used in the prior art, which mechanically largely remove the scale.
  • This pre-treated scale layer of the hot strip can only be removed in a neutral electrolytic pickling process with a poor efficiency of 20 to 30%, so that the electrolytic pickling process must be followed by a very effective chemical pickling process, in which a pickling time of approx. 60 sec. the strip is finished pickling.
  • a pickling time of approx. 60 sec. the strip is finished pickling.
  • a large amount of metal naturally goes into the acid, so that inevitably a high acid consumption is recorded, which in turn necessitates complex regeneration or neutralization processes with the appropriate facilities.
  • the cold strip is then annealed and pickled again.
  • the scale layer as already stated above, is considerably smaller and homogeneous, so that the neutral electrolytic pickling process subsequently used is considerably more effective.
  • the efficiency of this part of the system is between 80 and 100%.
  • the pickling time in the chemical pickling section is between 20 and 30 seconds. Accordingly, the acid consumption and the associated process of regeneration and neutralization of the acid is also much easier and cheaper. This is also important with regard to environmental pollution.
  • a system is to be created that is much easier to set up and therefore more economical to build. whereby the process carried out on the system pollutes the environment significantly less.
  • the production of the stainless steel cold strip takes place inline in the immediately successive work steps, descaling the preliminary strip, reducing the preliminary strip to finished thickness, annealing and pickling the strip.
  • the annealing and pickling process preceding the reduction of the preliminary strip in the known method and the intermediate descaling can be dispensed with entirely; instead, the descaled preliminary strip is first reduced to the desired size in one or more continuous rolling passes and only then subjected to the annealing and pickling treatment.
  • the fact that only the reduced preliminary strip, i.e. the cold strip, is annealed and pickled, results in the savings in pickling time and pickling media, as explained in the introduction, so that overall a very economical process can be expected.
  • the descaling of the preliminary strip is carried out mechanically and that the descaled preliminary strip is cleaned prior to the reduction of the preliminary strip to the finished thickness.
  • the hot-rolled pre-strip is therefore first subjected to mechanical descaling, it being possible, for example, to use grinding powder descaling with a subsequent grinding brush device. It is also conceivable to work with a stretch bending straightening unit, beam descaling and subsequent grinding brush devices in order to uncover rolled scale particles with great certainty.
  • the preliminary strip pre-treated in this way is used to reduce the thickness in a subsequent continuous rolling process, with thickness reductions of 30 to 80% depending on the number of roll stands used.
  • the reduction of the pre-strip to the finished thickness takes place in several immediately successive rolling passes without reversing the direction of strip travel, i.e. without the use of reversing roll stands.
  • the pre-strips are free of scale and grinding dust and can be deformed in multiple passes to cold strips with excellent surface properties.
  • the strip is passed through the treatment line a second or more times if the number of roll stands used in the rolling mill is too small to obtain the desired finished dimension.
  • a treatment line for carrying out the described method is characterized by the in-line arrangement of a mechanical descaling device, a multi-stand rolling mill, a continuous annealing furnace, an electrolytic and a chemical continuous pickling device and at least one winding device for the finished strip.
  • the mechanical descaling device can consist of a scale breaker with a downstream shot blaster, as well as brushing and cleaning devices for the descaled strip before it enters the rolling mill.
  • a strip storage device In order to be able to decouple the descaling device from the rolling mill, for example when welding successive coil lengths to one another or when rolling the rolling mill has to be changed, provision is made for a strip storage device to be arranged in front of or behind the descaling device and the rolling mill.
  • the present invention has a number of significant advantages. This saves operating costs compared to conventional systems as well as personnel costs.
  • the storage capacity and transport facilities are reduced. When the process is carried out in an environmentally friendly manner, better surface qualities can be produced.
  • the treatment time of the tapes is shorter.
  • a trimming device 4 for the edges of the preliminary strip is indicated behind the welding device 1.
  • a strip store is provided at 5; a similar strip storage 6 following the roller line 7 to be described can bridge roller change times in the roller line so that the strip 3 can be treated continuously.
  • a stretch bending straightening unit is indicated at 8, which serves to break up the scale layer of the hot-rolled preliminary strip and to improve the flatness of this strip.
  • a shot blaster for removing the scale layer is indicated, which is followed by a grinding brush 10 for exposing rolled-in scale nests and for improving the surface roughness of the strip by more than 50%.
  • a known cleaning device for the strip 3 is drawn, in which loose scale and grinding dust are prevented from entering the rolling mill 7.
  • the rolling mill 7, which is shown here with two roll stands, can consist of up to 5 roll stands, depending on the material and the required reduction.
  • the belt store 6 already described is followed by the continuous annealing furnace 12, which is followed by the pickling section 13, consisting of the neutral electrolytic pickling section 14 and the chemical pickling section 15.
  • a grinding brush unit can be arranged again between these.
  • the strip 3 is wound up at 18, an additional smoothing roll stand 19 with an upstream strip store 20 possibly being used.
  • the strip 3 is cut (weld seam removal) by means of the scissors shown at 21.
  • FIG. 2 shows a conventional strip treatment line, which consists of the unwinding station 22 for the preliminary strip 23, which is passed into an annealing furnace 24 with a subsequent descaling device 25.
  • the descaling device 25 is the pickling part 26 described in the introduction to the description with the disadvantages also described; the tape 23 is then wound at 27. After moving the coil into the unwind station 28 before the reversing stand 29, the strip is rolled in a reversing manner, the strip being wound up at 28a.
  • the ferro-rolled cold strip is again transferred to an unwinding station 30 and subjected to an annealing and pickling treatment in the annealing furnace 31 and the electrolytic pickling part 32 and the chemical pickling part 33 for the second time. Following the pickling process, the cold strip is wound up at 34.
  • system parts such as trimming devices, scissors, welding devices etc. are also integrated in the system according to the prior art, as can be found in the system according to the invention according to FIG. 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Metal Rolling (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Heat Treatment Of Steel (AREA)
EP95250250A 1994-10-14 1995-10-11 Procédé et dispositif pour fabriquer une bande d'acier inoxydable laminée à froid, cette bande obtenue d'une bande laminée à chaud Withdrawn EP0706840A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US32314794A 1994-10-14 1994-10-14
US323147 1994-10-14

Publications (2)

Publication Number Publication Date
EP0706840A2 true EP0706840A2 (fr) 1996-04-17
EP0706840A3 EP0706840A3 (fr) 1996-08-07

Family

ID=23257908

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95250250A Withdrawn EP0706840A3 (fr) 1994-10-14 1995-10-11 Procédé et dispositif pour fabriquer une bande d'acier inoxydable laminée à froid, cette bande obtenue d'une bande laminée à chaud

Country Status (3)

Country Link
EP (1) EP0706840A3 (fr)
JP (1) JPH08224601A (fr)
FI (1) FI954819A (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0769333A1 (fr) * 1995-10-19 1997-04-23 Usinor Sacilor Procédé d'élaboration, sur une ligne, en continu, d'une bande de tole laminée d'acier inoxydable présentant un état de surface améliorée
EP0770707A1 (fr) * 1995-09-01 1997-05-02 Keramchemie GmbH Procédé de fabrication en continu de bandes laminées au froid
FR2775205A1 (fr) * 1998-02-25 1999-08-27 Usinor Installation de fabrication de bandes d'acier inoxydable laminees a froid
WO1999058731A1 (fr) * 1998-05-13 1999-11-18 Abb Patent Gmbh Procede et systeme pour produire un feuillard lamine a chaud
FR2792857A1 (fr) * 1999-04-28 2000-11-03 Kvaerner Metals Clecim Procede de fabrication, en continu, d'une bande metallique
EP1721685A1 (fr) * 2005-05-10 2006-11-15 T.Sendzimir Inc. Laminoir amelioré à six cylindres supporté latéralement
CN100431725C (zh) * 2004-07-15 2008-11-12 Sms迪马格股份公司 用于轧制金属物料的轧制设备
DE102010026757A1 (de) * 2010-07-09 2012-01-12 Andritz Sundwig Gmbh Verfahren und Produktionslinie zum Herstellen eines kaltgewalzten Stahlflachprodukts aus einem nicht rostenden Stahl
CN108856290A (zh) * 2018-06-12 2018-11-23 无锡华玉铝业有限公司 三连冷轧机自动化生产线

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3232845B2 (ja) * 1994-01-24 2001-11-26 株式会社村田製作所 誘電体共振器装置
DE102018207026A1 (de) * 2017-10-06 2019-04-11 Sms Group Gmbh Multiflexible Walzanlage

Family Cites Families (9)

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DE1256102B (de) * 1962-08-20 1967-12-07 Bell Intercontinental Corp Verfahren zum Vorbereiten warmgewalzten Kohlenstoffbandstahls fuer anschliessende Kaltverformung
JPS54133460A (en) * 1978-04-08 1979-10-17 Nippon Steel Corp Manufacture of cold rolled steel strip
US4188812A (en) * 1979-01-03 1980-02-19 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Installation for production of continuously cold rolled sheet metal or strip
JPS5719105A (en) * 1980-07-10 1982-02-01 Nippon Steel Corp Installation for producing cold rolled steel plate and surface treated steel plate
JPH0673696B2 (ja) * 1989-06-23 1994-09-21 新日本製鐵株式会社 表面品質に優れたステンレス薄板の製造方法
JP2585444B2 (ja) * 1989-12-20 1997-02-26 株式会社日立製作所 ステンレス鋼帯の脱スケール方法及びその装置
JP2501137B2 (ja) * 1991-01-09 1996-05-29 新日本製鐵株式会社 表面性状の良好な帯状金属体の処理方法
US5197179A (en) * 1991-04-18 1993-03-30 T. Sendzimir, Inc. Means and a method of improving the quality of cold rolled stainless steel strip
DE4423664A1 (de) * 1994-07-07 1996-05-15 Bwg Bergwerk Walzwerk Verfahren zum Herstellen von kaltgewalzten Stahlbändern aus nichtrostendem Stahl und Metallbändern, insbesondere aus Titanlegierungen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0770707A1 (fr) * 1995-09-01 1997-05-02 Keramchemie GmbH Procédé de fabrication en continu de bandes laminées au froid
EP0769333A1 (fr) * 1995-10-19 1997-04-23 Usinor Sacilor Procédé d'élaboration, sur une ligne, en continu, d'une bande de tole laminée d'acier inoxydable présentant un état de surface améliorée
FR2740061A1 (fr) * 1995-10-19 1997-04-25 Ugine Sa Procede d'elaboration, sur une ligne, en continu, d'une bande de tole laminee d'acier inoxydable presentant un etat de surface amelioree
FR2775205A1 (fr) * 1998-02-25 1999-08-27 Usinor Installation de fabrication de bandes d'acier inoxydable laminees a froid
WO1999043451A1 (fr) * 1998-02-25 1999-09-02 Ugine S.A. Installation de fabrication de bandes d'acier inoxydable laminees a froid
WO1999058731A1 (fr) * 1998-05-13 1999-11-18 Abb Patent Gmbh Procede et systeme pour produire un feuillard lamine a chaud
US6463777B1 (en) 1999-04-28 2002-10-15 Vai Clecim Method for the continuous production of a metal strip
WO2000066287A1 (fr) * 1999-04-28 2000-11-09 Vai Clecim Procede de fabricaton, en continu, d'une bande metallique
FR2792857A1 (fr) * 1999-04-28 2000-11-03 Kvaerner Metals Clecim Procede de fabrication, en continu, d'une bande metallique
CN100431725C (zh) * 2004-07-15 2008-11-12 Sms迪马格股份公司 用于轧制金属物料的轧制设备
EP1721685A1 (fr) * 2005-05-10 2006-11-15 T.Sendzimir Inc. Laminoir amelioré à six cylindres supporté latéralement
US7185522B2 (en) 2005-05-10 2007-03-06 T. Sendzimir, Inc. Side supported 6-high rolling mill
DE102010026757A1 (de) * 2010-07-09 2012-01-12 Andritz Sundwig Gmbh Verfahren und Produktionslinie zum Herstellen eines kaltgewalzten Stahlflachprodukts aus einem nicht rostenden Stahl
WO2012004205A1 (fr) * 2010-07-09 2012-01-12 Andritz Sundwig Gmbh Procédé et chaîne de production destinés à fabriquer un produit plat en acier laminé à froid à partir d'un acier inoxydable
DE102010026757B4 (de) * 2010-07-09 2012-07-05 Andritz Sundwig Gmbh Verfahren und Produktionslinie zum Herstellen eines kaltgewalzten Stahlflachprodukts aus einem nicht rostenden Stahl
RU2562599C2 (ru) * 2010-07-09 2015-09-10 Андритц Сундвиг Гмбх Способ и производственная линия для получения холоднокатаного плоского изделия из нержавеющей стали
CN108856290A (zh) * 2018-06-12 2018-11-23 无锡华玉铝业有限公司 三连冷轧机自动化生产线

Also Published As

Publication number Publication date
EP0706840A3 (fr) 1996-08-07
JPH08224601A (ja) 1996-09-03
FI954819A (fi) 1996-04-15
FI954819A0 (fi) 1995-10-10

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