EP0603598A1 - Méthode de production d'une bande d'acier par coulée d'un lingot suivie d'un laminage - Google Patents

Méthode de production d'une bande d'acier par coulée d'un lingot suivie d'un laminage Download PDF

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Publication number
EP0603598A1
EP0603598A1 EP93119346A EP93119346A EP0603598A1 EP 0603598 A1 EP0603598 A1 EP 0603598A1 EP 93119346 A EP93119346 A EP 93119346A EP 93119346 A EP93119346 A EP 93119346A EP 0603598 A1 EP0603598 A1 EP 0603598A1
Authority
EP
European Patent Office
Prior art keywords
strand
strip
thickness
pinch rollers
squeezing
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.)
Ceased
Application number
EP93119346A
Other languages
German (de)
English (en)
Inventor
Erich Dr.-Ing. Höffken
Dieter Dipl.-Ing. Krüger
Gisbert Dipl.-Ing. Mehring
Günter Dipl.-Ing. Pietzko
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.)
Thyssen Stahl AG
Original Assignee
Thyssen Stahl 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 Thyssen Stahl AG filed Critical Thyssen Stahl AG
Publication of EP0603598A1 publication Critical patent/EP0603598A1/fr
Ceased 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
    • 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
    • B21B1/46—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 metal immediately subsequent to continuous casting
    • B21B1/463—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 metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/68—Camber or steering control for strip, sheets or plates, e.g. preventing meandering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/14—Soft reduction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/18—Vertical rolling pass lines
    • 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

Definitions

  • the invention relates to a method for producing a steel strip, in particular with a thickness of 2-25 mm, by casting a strand in a cooled, oscillating continuous mold, by squeezing the continuous mold with solidified strand shells and a liquid core, in particular in a thickness of 40- 50 mm, leaving strand until at least for the welding of the strand shells and subsequent hot rolling of the strand in the casting heat, in particular up to a strip thickness of 2-25 mm.
  • the heat transfer during cooling of the strand in the continuous mold can lead to the formation of Strand shells come with locally different thicknesses. If such a strand is squeezed together by the crushing rollers arranged downstream of the mold until the strand shells are welded together, a strand can be formed which not only has a different temperature over its width, but also a different thickness and structure. These local differences across the strand width cause different deformation resistances of the material and, when rolled down with the pinch rollers, cause the strip emerging from the roll gap to appear wavy across the width in the longitudinal direction due to fibers of different lengths.
  • the invention has for its object to provide a correction option for the strip travel for a method for producing a steel strip of the type mentioned.
  • This object is achieved in a method of the type mentioned at the outset in that, given a roll gap profile which is predetermined over the strip width, the strip travel of the hot-rolled strip is corrected in the event of a deviation from straight running by changing the extruded profile when squeezing.
  • the method according to the invention for correcting the strip travel does not intervene on the deformation unit which determines the strip profile and behind which any misalignment is determined, but on the upstream deformation unit.
  • This is advantageous because, on the one hand, the engagement does not adversely affect the belt profile and, on the other hand, the engagement can be carried out with comparatively small deformation forces on the upstream deformation unit, ie where the strand is squeezed together.
  • the invention is based on the idea that all that is required for the correction of the strip travel is to specify a changed profile for the deformation unit which gives the strip profile. Whether that lopsided in the area between the crushing of the strand and the rolling down Belt run is irrelevant, because in the end it is only a question of the belt running straight after being rolled down and having the profile required for further processing over the entire width.
  • the thickness profile of the strand can be set within certain limits very precisely and without great effort, since here the strand still has a liquid core, or the inside of the shell is still doughy.
  • the following boundary conditions should be observed: 2 SD - 3 mm ⁇ QS ⁇ 2 x SD - 0.5 mm with SD as the thickness of the strand shell when the pinch zone is reached and QS as the thickness of the strand.
  • the strand emerging from the mold is squeezed together preferably by at least one pair of rollers with driven rollers.
  • a squeezing force QK 50-600 kN is sufficient for welding the strand shells and for the desired structural compaction.
  • the adjustment of the strand profile correcting the strip travel takes place on the last pinch rollers.
  • the tape edges can be detected by means of conventional measuring devices, such as rolls that scan the tape edges or contactless sensors, such as inductive sensors, or laser distance measuring devices.
  • the measuring location should be as close as possible to the hot rolling location. However, it must be so far from the hot rolling location that a deviation can be measured using simple means.
  • the strip edges are detected in several layers lying one behind the other in the strip running direction. If the tape is guided in the sheet, the tape run can also be determined by determining the radius of the sheet on both tape edges. This method of measurement is based on the knowledge that the tape is firmly clamped in front of and behind the sheet, but is freely guided in between, so that different lengths of tape are responsible for the misalignment Result in arc radii.
  • the correction of a slanting tape generally leads to different gap widths for the two edges of the strand in the pinch roller gap when squeezed together.
  • the gap of the pinch rollers arranged in front of the roll stand is adjusted according to the invention.
  • the result is that the nip roller gap on the right and left edge takes on different values. It has now been shown that when an extremely asymmetrical pinch roller gap is set, the position of the strand between the pinch rollers and the mold outlet can also be influenced, even if the drive of the pinch rollers prevents the rollers from slipping. This can also have repercussions on the strand part still in the mold. This can result in canting of the strand in the mold, which leads to the partial lifting of the strand shell, in particular from the walls of the narrow sides of the mold.
  • the invention provides that the control of the pinch rollers, which are dependent on the rear position values of the strip measured on the roll stand, a second control is superimposed, which takes place as a function of the temperature or the heat flow density of the mold narrow sides.
  • the heat flow density measured in the narrow sides should be set between 500 and 1,500 kW / m2. If the heat flow density falls below 500 kW / m2, there is a risk of a strand shell breakthrough, so that the casting must be temporarily interrupted when such a value occurs.
  • the system consists of an oscillating continuous mold 1 with cooled walls.
  • a strand 2 with solidified strand shells 2a, 2b and liquid core 2c emerges from this continuous mold 1.
  • the strand 2 is squeezed between a pair of pinch rollers 3a, 3b to such an extent that the strand shells 2a, 2b each having a thickness SD in the inlet area of the pair of pinch rollers 3a, 3b at least weld to one another on the inside.
  • the strand 2 enters a roll stand with two rollers 4a, 4b, which give the emerging strip 5 a profile that is predetermined over the strip width.
  • the band 5 is guided freely in the sheet and possibly passed over guide rollers 6a, 6b through an oven 7 to compensate for the temperature losses and further from one or more high-deformation stands 8a, 8b reshaped.
  • the special feature of the system according to the invention is that the strip travel is measured in the strip running direction behind the roll stand 4a, 4b, that is to say it is determined whether the strip 5 runs wrong.
  • the measurement is carried out via the radii of curvature R 1, R 2 of the two strip edges or via a distance measurement of the strip edges from fixed locations arranged at the same distance when the strip is at the desired position.
  • a setting is made on the pinch rollers 3a, 3b by increasing or decreasing the distance between the pinch rollers 3a, 3b at one end, depending on the desired strip travel correction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
EP93119346A 1992-12-23 1993-12-01 Méthode de production d'une bande d'acier par coulée d'un lingot suivie d'un laminage Ceased EP0603598A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4243857A DE4243857C1 (de) 1992-12-23 1992-12-23 Verfahren zum Herstellen eines Stahlbandes durch Gießen eines Stranges und anschließendes Walzen
DE4243857 1992-12-23

Publications (1)

Publication Number Publication Date
EP0603598A1 true EP0603598A1 (fr) 1994-06-29

Family

ID=6476406

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93119346A Ceased EP0603598A1 (fr) 1992-12-23 1993-12-01 Méthode de production d'une bande d'acier par coulée d'un lingot suivie d'un laminage

Country Status (6)

Country Link
US (1) US5479982A (fr)
EP (1) EP0603598A1 (fr)
JP (1) JPH06226412A (fr)
BR (1) BR9305198A (fr)
CA (1) CA2111903A1 (fr)
DE (1) DE4243857C1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999054072A1 (fr) * 1998-04-17 1999-10-28 Sms Schloemann-Siemag Aktiengesellschaft Procede et dispositif pour la coulee continue de feuillards metalliques minces
CN103111822A (zh) * 2011-11-16 2013-05-22 中冶东方工程技术有限公司秦皇岛研究设计院 一种中厚板生产工艺

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITRM20050523A1 (it) * 2005-10-21 2007-04-22 Danieli Off Mecc Processo e impianto per la produzione di nastro metallico.
ITRM20070150A1 (it) * 2007-03-21 2008-09-22 Danieli Off Mecc Processo e impianto per la produzione di nastro metallico
CN101683709B (zh) * 2008-09-27 2012-11-14 宝山钢铁股份有限公司 薄带连铸连续生产中口径焊管的方法
EP3338914A1 (fr) * 2016-12-22 2018-06-27 Primetals Technologies Austria GmbH Procede de fabrication de bandes bobinees sans fin laminees a chaud dans une installation combinee de coulee et de laminage, procede de demarrage d'une installation combinee de coulee et de laminage et installation combinee de coulee et de laminage
CN107282904B (zh) * 2017-05-09 2019-03-05 江阴兴澄特种钢铁有限公司 一种连铸轻压下测厚辊设置及控制方法
US10850322B2 (en) * 2017-10-30 2020-12-01 Nucor Corporation Casting stand control system with radius roll feedback and method of use
CN111842484B (zh) * 2020-07-23 2021-07-27 东北大学 一种基于两轧辊交替工作的连铸板坯热芯轧制方法
CN113210425A (zh) * 2021-03-18 2021-08-06 兴化市广福金属制品有限公司 一种不锈钢带材连轧连铸设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3491562A (en) * 1966-10-12 1970-01-27 Hitachi Ltd System and apparatus for effecting a correction of deflection of strip steel from its normal path of travel in a tandem rolling mill
EP0263725A2 (fr) * 1986-09-04 1988-04-13 Kawasaki Steel Corporation Procédé et dispositif de forgeage continu pour l'acier obtenu par coulée continue
EP0286862A1 (fr) * 1987-04-13 1988-10-19 Thyssen Stahl Aktiengesellschaft Procédé pour fabriquer une bande d'acier
JPH01289552A (ja) * 1988-05-16 1989-11-21 Sumitomo Metal Ind Ltd 丸形連続鋳造鋳片の鍛圧装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH658209A5 (de) * 1982-10-18 1986-10-31 Alusuisse Einrichtung zum verstellen der groesse eines von zwei walzen gebildeten spaltes.
SE464465B (sv) * 1986-06-27 1991-04-29 Oerjan Axelsson Foerfarande och anordning foer maetning och registrering av en straengstyrnings rullavstaand och geometri i en straenggjutningsmaskin

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3491562A (en) * 1966-10-12 1970-01-27 Hitachi Ltd System and apparatus for effecting a correction of deflection of strip steel from its normal path of travel in a tandem rolling mill
EP0263725A2 (fr) * 1986-09-04 1988-04-13 Kawasaki Steel Corporation Procédé et dispositif de forgeage continu pour l'acier obtenu par coulée continue
EP0286862A1 (fr) * 1987-04-13 1988-10-19 Thyssen Stahl Aktiengesellschaft Procédé pour fabriquer une bande d'acier
JPH01289552A (ja) * 1988-05-16 1989-11-21 Sumitomo Metal Ind Ltd 丸形連続鋳造鋳片の鍛圧装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 14, no. 69 (M - 932)<4012> 8 February 1990 (1990-02-08) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999054072A1 (fr) * 1998-04-17 1999-10-28 Sms Schloemann-Siemag Aktiengesellschaft Procede et dispositif pour la coulee continue de feuillards metalliques minces
US6491088B1 (en) 1998-04-17 2002-12-10 Sms Schloemann-Siemag Aktiengesellschaft Method and device for continuously casting thin metal strips
CN103111822A (zh) * 2011-11-16 2013-05-22 中冶东方工程技术有限公司秦皇岛研究设计院 一种中厚板生产工艺
CN103111822B (zh) * 2011-11-16 2015-05-20 中冶东方工程技术有限公司秦皇岛研究设计院 一种中厚板生产工艺

Also Published As

Publication number Publication date
US5479982A (en) 1996-01-02
DE4243857C1 (de) 1994-07-28
CA2111903A1 (fr) 1994-06-24
BR9305198A (pt) 1994-08-09
JPH06226412A (ja) 1994-08-16

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