EP4122616A1 - Procédé et dispositif de fabrication d'une bande métallique - Google Patents

Procédé et dispositif de fabrication d'une bande métallique Download PDF

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Publication number
EP4122616A1
EP4122616A1 EP22184465.7A EP22184465A EP4122616A1 EP 4122616 A1 EP4122616 A1 EP 4122616A1 EP 22184465 A EP22184465 A EP 22184465A EP 4122616 A1 EP4122616 A1 EP 4122616A1
Authority
EP
European Patent Office
Prior art keywords
slab
rolling
temperature
train
induction heating
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Withdrawn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
EP22184465.7A
Other languages
German (de)
English (en)
Inventor
Olaf Norman Jepsen
Joachim Ohlert
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.)
SMS Group GmbH
Original Assignee
SMS Group GmbH
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 SMS Group GmbH filed Critical SMS Group GmbH
Publication of EP4122616A1 publication Critical patent/EP4122616A1/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Withdrawn legal-status Critical Current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
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0085—Joining ends of material to continuous strip, bar or sheet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/20—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/20—Temperature
    • B21B2261/21—Temperature profile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2273/00—Path parameters
    • B21B2273/12—End of product
    • B21B2273/14—Front end or leading end
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2273/00—Path parameters
    • B21B2273/12—End of product
    • B21B2273/16—Tail or rear end
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2273/00—Path parameters
    • B21B2273/20—Track of product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/006—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring temperature
    • 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 metal strip, wherein the strip is rolled out of a slab in a rolling train by means of a number of roll stands, the slab to be rolled being assembled from individual partial slabs, the individual partial slabs being assembled in a slab connecting device, in which the two partial slabs are joined. Furthermore, the invention relates to a device for producing a metallic strip.
  • the strip to be finish-rolled can be composed of several sub-strips that are provided as coils.
  • this also includes pre-strips, which are connected to one another accordingly in order to be able to roll them out in a continuously operating rolling process.
  • the invention is based on the object of developing a method of the type mentioned at the beginning and providing a corresponding device with which it is possible to reduce process-related temperature non-uniformities over the strip length (ie in the rolling direction) as a result of the process of joining the partial slabs or even out completely. This is intended to increase the quality of the tape produced.
  • the solution to this problem provided by the invention is characterized in that after the partial slabs have been joined, the course of the temperature of the slab is measured in the rolling direction and that induction heating for heating the slab is arranged downstream of the slab joining device, with the induction heating being based on the measured temperature profile is activated in such a way that a more uniform temperature profile results in the rolling direction in the slab.
  • the induction heating can be activated according to a predetermined course as soon as the point on the slab at which the temperature has dropped passes the location of the induction heating. It can be provided that the predetermined curve for activating the induction heating is a gradual or continuous increase in the current (or the power) in the induction heating with a subsequent gradual or continuous drop in the current (or the power).
  • the slab joining device may be provided between a tunnel furnace following a caster and the first stand of a finishing train in a cast-rolling plant.
  • the slab joining device may also be provided between the last stand of a roughing train and the first stand of a finishing train in a hot rolling mill.
  • the slab connecting device can also be provided between a coil box and the rolling train.
  • At least one further induction heater is arranged between two rolling stands of the rolling train.
  • the rolling in the rolling train preferably takes place in a continuous process.
  • the device for producing a metallic strip in a rolling train using a number of roll stands for rolling out a slab, with a slab connecting device being provided with which the slab to be rolled can be assembled from individual partial slabs, is characterized according to the invention by an induction heating system following the slab connecting device in the rolling direction , with which the slab can be heated according to a predetermined intensity profile.
  • Measuring means for measuring the course of the temperature of the slab in the rolling direction can be arranged in the area of the slab joining device and in the rolling direction before the induction heating.
  • a controller is arranged, which is connected to the measuring means, the controller being designed to activate the induction heating according to a predetermined course if the temperature of the slab drops at the point of measurement, as soon as the point of the Slab where the temperature has dropped passes the location of induction heating.
  • the distance between the measuring means and the induction heating is preferably between 3 m and 20 m, in particular between 5 m and 15 m.
  • At least one further induction heater can be arranged between two roll stands of the rolling train.
  • an endless rolling method is thus made possible during (finish) rolling, in which a slab joining device is used, with improved homogeneous product properties being able to be achieved in the finished strip through the proposed procedure. Namely, thermal deviations occurring through the process of joining two slabs in the slab joining device can be compensated.
  • the process can be used in conventional hot strip mills or in continuous casting plants (CSP plants).
  • friction welding devices are used as the slab joining device, as in the above-mentioned WO 2017/140886 A1 are described.
  • pre-strips or thin slabs can thus be joined and then rolled together.
  • the induction heating provided behind the slab joining device acts as an actuator for setting optimal product properties during endless rolling.
  • pre-strips or (thin) slabs can be combined with additional heating before and during rolling.
  • the pre-strips or thin slabs can be connected with the slab connecting device in order to be rolled endlessly.
  • the slab joining machine is located in the hot rolling mill between the last roughing stand and the first stand of the finishing train.
  • the slab connecting device is placed between the tunnel furnace and the first stand of the finishing train.
  • inductive heaters can be located between two or more finishing stands. These interstand heaters heat the strip between two forming operations. In addition to the interstand heaters, an inductive heater can also be used between the slab joining device and the first finishing stand.
  • the combination of the proposed measures achieves an improvement in the endless rolling process.
  • the temperature profile of the strip and thus the properties of the end product can be positively influenced by compensating for the temperature fluctuations or temperature deviations that occur as a result of the process of connecting the partial slabs.
  • the mass flows of the casting machine and the rolling train can be better coordinated to enable a longer endless rolling process.
  • the inductive heating in front of the first stand is used to compensate for temperature differences over the length of the strip (i.e. in the direction of rolling) and thus to keep the rolling conditions constant.
  • a temperature deviation due to incorrect or precise setups when connecting the partial slabs can be compensated for, which is possible by combining the measuring method with subsequent inductive heating of the slab.
  • Temperature deviations or temperature fluctuations as a result of process deviations or process disturbances can be compensated for (e.g. with regard to the oven temperature and the residence time in the oven). Furthermore, such a compensation is also possible with a view to other process deviations (for example with regard to the chemical composition and the geometry).
  • Suitable measuring devices for detecting the temperature of the slab for example pyrometers and cameras
  • pyrometers and cameras are well known and do not need to be described in more detail here. Elements of this type are sometimes already present in a slab joining device (for monitoring the welding process) and can therefore be used.
  • the at least one provided induction heating provides an actuator for reaching the required final rolling temperature as a substitute for the rolling speed actuator (faster and more effective, but constant conditions in the cooling section and during winding).
  • this provides an actuator for the profile and the flatness as well as the rolling stability when rolling very thin strips.
  • figure 1 a system is shown schematically with which a steel strip can be produced.
  • a slab of a certain length is produced in each of two casting machines 7 .
  • the slabs enter a tunnel furnace 6, in which they are kept at a defined temperature.
  • Downstream in the rolling direction R is a rolling train 1 which has a number of rolling stands 2 .
  • the aim is for the strip to be produced to have as homogeneous a property as possible, both over its length, its width and its thickness.
  • Constant process conditions during hot rolling and thus constant properties after hot rolling are characteristic features of continuous processes and generally lead to increased process stability in the subsequent processing steps and to higher product quality afterwards. This applies to geometry, surface quality and material properties, among other things. All of these properties are almost constant over the tape length, tape width and tape thickness, which also means that the usual large deviations at the tape head and tape end are avoided.
  • induction heater 5 between the third and fourth roll stand 2 and three further induction heaters 9 between the roll stands 4, 5, 6 and 7.
  • FIG 2 A similar system is shown, but here the induction heating 5 follows directly behind the slab connecting device 4 .
  • Two more induction heaters 9 are provided in the rolling train 1 between the last three roll stands 2 .
  • a conventional hot rolling mill is provided, in which, as in figure 2 , the induction heater 5 is located directly behind the slab joining device 4 .
  • the pre-strip is first rolled with the roughing stand 12. The strip is then wound into a coil and stored in the coil box 8. The end of the strip of the coil processed first and the beginning of the strip of the following coil are then connected to one another in the slab connecting device 4 .
  • the coil box 8 results in a temperature difference from the end of a pre-strip to the head of the next pre-strip.
  • the induction heating 5 in front of the first stand can be used to minimize this temperature difference through a suitable mode of operation and thus to keep the rolling conditions as constant as possible.
  • the two other induction heaters enable the rolling of thinner final gauges for high-strength steel grades.
  • the strip temperature can therefore be increased.
  • this also applies to the induction heating 5.
  • the slab 3 is assembled from two partial slabs 3a and 3b and fed to the rolling train 1 .
  • a suitable slab joining device 4 is in the one mentioned above WO 2017/140886 A1 described.
  • a measuring device 10 for measuring the temperature T is arranged behind the welding point in the rolling direction R.
  • the measuring device 10 is connected to the controller 11, which records the measured temperature T.
  • the controller 11 provides control data to the induction heater 5 (in the form of the current I with which the induction heater 5 is activated).
  • the induction heater is 5 in a distance a from the measuring device 10 (location of the measuring device 10: x 1 ; location of the induction heating 5: x 2 , see figure 4 ).
  • the controller 10 also has data from which the movement of the slab 3 over time can be calculated.
  • the slab speed is thus known or can be detected by a corresponding measurement.
  • the distance a between the location of the measuring means 10 and the location of the induction heating 5 is known. It can thus be determined in a simple manner in the controller 11 when the point on the slab at which the drop in temperature was registered passes the point of the induction heating 5 .
  • the controller 11 causes the current I in the induction heater 5 to be increased at the corresponding point in time, as is indicated in the partial figure.
  • the size of the "pulse" of the current I depends on the temperature drop at location x 1 and is dimensioned in such a way that the temperature of the slab 3 is increased locally at location x 2 in such a way that the temperature drop at location x 1 is ideally completely compensated.
  • the rolling speed can be increased or decreased if this is necessary to achieve the required product properties. Endless rolling is also possible if the rolling speed is higher or lower than the cumulative casting speed.
  • slab is usually used for the material in front of the roughing stand, after which it is roughing strip. Belts are then spoken of in and after the finishing train. Strips are made from thin slabs in a CSP plant. In the present case, the material before the finishing train is primarily meant. However, slabs in the actual sense can also be treated according to the invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
EP22184465.7A 2021-07-23 2022-07-12 Procédé et dispositif de fabrication d'une bande métallique Withdrawn EP4122616A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021207942.3A DE102021207942A1 (de) 2021-07-23 2021-07-23 Verfahren und Vorrichtung zum Herstellen eines metallischen Bandes

Publications (1)

Publication Number Publication Date
EP4122616A1 true EP4122616A1 (fr) 2023-01-25

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Family Applications (1)

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EP22184465.7A Withdrawn EP4122616A1 (fr) 2021-07-23 2022-07-12 Procédé et dispositif de fabrication d'une bande métallique

Country Status (3)

Country Link
EP (1) EP4122616A1 (fr)
JP (1) JP2023016724A (fr)
DE (1) DE102021207942A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5674302A (en) * 1979-11-24 1981-06-19 Sumitomo Metal Ind Ltd Reheating method for steel billet in hot rolling line
EP0666122A1 (fr) * 1994-01-27 1995-08-09 Sms Schloemann-Siemag Aktiengesellschaft Procédé et installation pour la fabrication de bandes d'acier laminées à chaud à partir d'ébauches coulées en continu
DE69207673T2 (de) * 1991-08-16 1996-05-30 Kawasaki Steel Co Verfahren zum Kontinuierlichen Warmbandwalzen
CN106808082A (zh) * 2017-01-19 2017-06-09 中冶赛迪工程技术股份有限公司 一种无头轧制中间坯连接方法及系统
WO2017140886A1 (fr) 2016-02-17 2017-08-24 Sms Group Gmbh Dispositif et procédé de soudage par friction de produits métalliques chauds
WO2019030392A1 (fr) * 2017-08-10 2019-02-14 Sms Group Gmbh Dispositif et procédé de soudage par friction de produits métalliques chauds

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1288863B1 (it) * 1996-03-15 1998-09-25 Danieli Off Mecc Procedimento di laminazione in continuo per lamiere e/o nastri e relativa linea di laminazione in continuo
DE19649295A1 (de) * 1996-11-28 1998-06-04 Schloemann Siemag Ag Warmwalzanlage
JP2006239777A (ja) * 1997-10-07 2006-09-14 Jfe Steel Kk 熱延鋼板の製造方法
JPH11169910A (ja) * 1997-10-07 1999-06-29 Kawasaki Steel Corp 熱延鋼板の製造方法
JP3187355B2 (ja) * 1997-10-27 2001-07-11 川崎製鉄株式会社 熱間圧延設備
JP2003275805A (ja) * 2002-03-20 2003-09-30 Jfe Steel Kk 高炭素鋼の熱間圧延方法
CN206415418U (zh) * 2017-01-19 2017-08-18 中冶赛迪工程技术股份有限公司 一种中间坯连接装置及系统

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5674302A (en) * 1979-11-24 1981-06-19 Sumitomo Metal Ind Ltd Reheating method for steel billet in hot rolling line
DE69207673T2 (de) * 1991-08-16 1996-05-30 Kawasaki Steel Co Verfahren zum Kontinuierlichen Warmbandwalzen
EP0666122A1 (fr) * 1994-01-27 1995-08-09 Sms Schloemann-Siemag Aktiengesellschaft Procédé et installation pour la fabrication de bandes d'acier laminées à chaud à partir d'ébauches coulées en continu
WO2017140886A1 (fr) 2016-02-17 2017-08-24 Sms Group Gmbh Dispositif et procédé de soudage par friction de produits métalliques chauds
CN106808082A (zh) * 2017-01-19 2017-06-09 中冶赛迪工程技术股份有限公司 一种无头轧制中间坯连接方法及系统
WO2019030392A1 (fr) * 2017-08-10 2019-02-14 Sms Group Gmbh Dispositif et procédé de soudage par friction de produits métalliques chauds

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JP2023016724A (ja) 2023-02-02
DE102021207942A1 (de) 2023-01-26

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