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EP0353402B1 - Procédé de production d'une bande d'acier ayant une épaisseur de moins de 10 mm - Google Patents

Procédé de production d'une bande d'acier ayant une épaisseur de moins de 10 mm Download PDF

Info

Publication number
EP0353402B1
EP0353402B1 EP89108232A EP89108232A EP0353402B1 EP 0353402 B1 EP0353402 B1 EP 0353402B1 EP 89108232 A EP89108232 A EP 89108232A EP 89108232 A EP89108232 A EP 89108232A EP 0353402 B1 EP0353402 B1 EP 0353402B1
Authority
EP
European Patent Office
Prior art keywords
strand
thickness
solidified
cast
ingot mould
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
Application number
EP89108232A
Other languages
German (de)
English (en)
Other versions
EP0353402A1 (fr
Inventor
Erich Dr.-Ing. Höffken
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6358650&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0353402(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Thyssen Stahl AG filed Critical Thyssen Stahl AG
Priority to AT89108232T priority Critical patent/ATE81042T1/de
Priority to BR898907544A priority patent/BR8907544A/pt
Priority to KR1019900700513A priority patent/KR900701438A/ko
Priority to JP50699589A priority patent/JPH04500478A/ja
Priority to NZ22985189A priority patent/NZ229851A/en
Priority to AU37946/89A priority patent/AU620419B2/en
Priority to PT9115789A priority patent/PT91157B/pt
Priority to CN 89104780 priority patent/CN1039371A/zh
Priority to CA 605581 priority patent/CA1325326C/fr
Publication of EP0353402A1 publication Critical patent/EP0353402A1/fr
Priority to FI910136A priority patent/FI88591C/fi
Priority to SU4894202 priority patent/RU2013184C1/ru
Priority to DK004891A priority patent/DK4891A/da
Publication of EP0353402B1 publication Critical patent/EP0353402B1/fr
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • 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
    • 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

Definitions

  • the invention relates to a method for producing a steel strip with a thickness of less than 10 mm by casting a strand in a cooled continuous mold and then compressing the strand which has not yet solidified and which emerges from the mold until the inner walls of the strand shell which has already solidified are welded.
  • the pre-strip produced in the conventional manner is cooled and, after it has completely solidified, divided into pieces of suitable length or wound up into a strip.
  • the bundle is heat-treated in a temporary storage furnace and set to a uniform temperature.
  • the tape is rolled out in several embroidery. Because of the necessary intermediate storage furnace and the large number of roll stands for rolling out, the effort for rolling thin strips is still great.
  • a further disadvantage with such a rolling out after the strip has been heated up is that the strip scales on the surface. This makes perfect hot rolling difficult.
  • a method for producing thin strips in a continuous mold in which the strand which has not yet solidified is pressed together by two squeezing rollers forming the mold outlet to such an extent that the inner sides of the solidified strand shells touch one another.
  • the thickness of the tape thus produced corresponds to the sum of the thicknesses of the strand shells.
  • the mold emerging solidified strand shells can be reduced in thickness immediately after leaving the mold in the same operation by compressing the cast strand with a degree of deformation of more than 40%.
  • Such a reduction in thickness can be achieved with a rolling stand arranged at the mold outlet, in particular a horizontally driven four-high stand.
  • a thin strip can be produced from the steel rod that has not yet solidified from the mold and can be wound into coils or further processed immediately after appropriate cooling.
  • the production of steel strips using the method according to the invention is extremely inexpensive, since no large plants with heating furnaces and roll stands with a corresponding energy requirement are required.
  • the various parameters for casting the steel strand on the one hand and for reducing the thickness of the strand shells on the other hand are matched to one another in such a way that the steel strand can be pressed together without breakthroughs and the strand shells can withstand the considerable deformations when reducing the thickness. It has proven to be particularly advantageous if the casting speed and / or the cooling intensity of the mold is controlled in such a way that the steel strand has a strand shell with a thickness of 5-10 mm when it emerges from the mold. In this way it is ensured that the strand shell is resistant enough to withstand the forces occurring during the deformation without the formation of cracks.
  • the compressed strand shells are pressed together after the cast strand emerges from the continuous mold at the highest possible temperatures.
  • Good results have been achieved if the surface temperature of the cast strand is more than 1100 ° C., preferably 1200 ° C. to 1400 ° C., in particular 1300 ° C. It has been shown that it is advantageous if there is a temperature gradient in the strand shell perpendicular to the strand surface, which is determined by the strand surface temperature and a temperature close to the solidus temperature in the interior of the cast strand. Since all steel grades are highly resilient at a temperature of more than 1200 ° C, cracks in the strand skin during deformation are avoided if the aforementioned temperatures are observed.
  • the strand shells For the formation of a particularly good structure of the rolled strip, it is further advantageous to reduce the strand shells with a degree of deformation of 50-80% in thickness when the cast strand is compressed. For some applications and / or for some steel grades, it may be advantageous to improve the surface quality by re-rolling the strips with a degree of deformation of less than 5%. It is also possible to provide the belt with a contour.
  • a first reduction in the thickness of the cast strand is already carried out in the continuous mold.
  • the strand shells which form on the broad sides of the continuous mold are brought together at least in the central region by a corresponding design of the funnel-shaped region of the continuous mold while the cast strand is being pulled out.
  • the cooling of the continuous mold is adjusted in such a way that the formation of the strand shells begins in the funnel-shaped area. so that a strand with a still molten core is formed there. It is important that the strand shell is only formed with a thickness at which a merging is still possible.
  • an oscillating mold 2 which consists of a funnel-shaped upper part and a lower part with cooling walls arranged in parallel, the spacing of which is selected according to the thickness of the strand to be cast.
  • the solidifying strand shells are already brought together in the funnel-shaped region when the cast strand is pulled out, as a result of which a first reduction in the thickness of the cast strand is achieved.
  • a roll stand 3 with which the solidified strand shells are pressed together, welded together and reduced in thickness.
  • the rolling stand is, for example, a horizontally arranged four-high stand, the driven work rolls 3a of which can be adjusted by means of hydraulic cylinders for the compression and reduction of the thickness of the strand 10.
  • the driven work rolls 3a of which can be adjusted by means of hydraulic cylinders for the compression and reduction of the thickness of the strand 10.
  • the diameter d of the work rolls 3a should be between 0.5 and 1 m, while the distance D of the beginning of the area of attack from the lower edge of the mold 2 should be less than 0.5 m.
  • the roll stand 3 can be followed by a roll stand 5 behind an arch guide 4, with which the solidified cast strand is trained with a low degree of deformation of about 5%.
  • a cooling device 6, scissors 7 and a reel 8 for winding the strip 9 are provided behind the roll stand 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Continuous Casting (AREA)

Claims (6)

  1. Procédé pour la fabrication d'un feuillard d'acier (9) d'une épaisseur inférieure à 10 mm par coulée d'une barre d'acier dans un moule de coulée continue (2) et compression (3) suivante de la barre d'acier non encore complètement durcie sortant du moule (2) jusqu'au soudage des parois internes de la croûte de barre déjà solidifiée,
    caractérisé en ce que les croûtes solidifiées de barre sont réduites d'épaisseur avec un taux de déformation > 40 % immédiatement après avoir quitté le moule (2) au cours du même passage que la compression (3).
  2. Procédé selon la revendication 1,
    caractérisé en ce que les croûtes solidifiées de barre sont réduites d'épaisseur de 50 - 80 % avec la compression de la barre de coulée (3).
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce que les croûtes solidifiées de barre se solidifiant sur les grandes faces du moule de coulée continue (2) sont guidées, lors de l'extraction de la barre de coulée hors du moule (2), à travers une configuration en forme d'entonnoir du moule de coulée continue (2) dans le but de réduire l'épaisseur de la barre de coulée.
  4. Procédé selon l'une des revendications 1 à 3,
    caractérisé en ce que le refroidissement du moule de coulée continue (2) est réglé de telle manière que la barre de coulée possède, à la sortie du moule (2) et avant la compression (3, 3a), une température superficielle de 1 100°C à 1 400°C, en particulier de 1 300°C.
  5. Procédé selon l'une des revendications 1 à 4,
    caractérisé en ce que la barre de coulée est soumise, après la compression (3), à un laminage postérieur avec un taux de déformation d'environ 5 %.
  6. Procédé selon la revendication 5,
    caractérisé en ce que la barre de coulée est profilée lors du laminage postérieur (5).
EP89108232A 1988-07-14 1989-05-08 Procédé de production d'une bande d'acier ayant une épaisseur de moins de 10 mm Expired - Lifetime EP0353402B1 (fr)

Priority Applications (12)

Application Number Priority Date Filing Date Title
AT89108232T ATE81042T1 (de) 1988-07-14 1989-05-08 Verfahren zum herstellen eines stahlbandes mit einer dicke von weniger als 10 mm.
BR898907544A BR8907544A (pt) 1988-07-14 1989-06-29 Processo para a producao de uma fita de aco com uma espessura de menos de 10 mm
KR1019900700513A KR900701438A (ko) 1988-07-14 1989-06-29 두께 10mm이하인 강스트립의 제조방법
JP50699589A JPH04500478A (ja) 1988-07-14 1989-06-29 板厚１０ｍｍ未満の鋼帯の製造方法
NZ22985189A NZ229851A (en) 1988-07-14 1989-07-06 Producing steel strip of less than 10 mm thickness
AU37946/89A AU620419B2 (en) 1988-07-14 1989-07-07 Method of producing a steel strip having a thickness of less than 10 mm
PT9115789A PT91157B (pt) 1988-07-14 1989-07-13 Processo para a producao de uma fita de aco com uma espessura inferior a 10 mm
CN 89104780 CN1039371A (zh) 1988-07-14 1989-07-13 厚度小于10毫米的钢带的生产方法
CA 605581 CA1325326C (fr) 1988-07-14 1989-07-13 Procede de fabrication de bande d'acier de moins de 10 mm d'epaisseur
FI910136A FI88591C (fi) 1988-07-14 1991-01-10 Foerfarande foer framstaellning av ett staolband med en tjocklek under 10 mm
SU4894202 RU2013184C1 (ru) 1988-07-14 1991-01-10 Способ непрерывного литья стальной полосы толщиной менее 10 мм
DK004891A DK4891A (da) 1988-07-14 1991-01-11 Fremgangsmaade til fremstilling af et staalbaand med en tykkelse paa mindre end 10 mm

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3823861 1988-07-14
DE3823861A DE3823861A1 (de) 1988-07-14 1988-07-14 Verfahren und anlage zum herstellen eines stahlbandes mit einer dicke von weniger als 10 mm

Publications (2)

Publication Number Publication Date
EP0353402A1 EP0353402A1 (fr) 1990-02-07
EP0353402B1 true EP0353402B1 (fr) 1992-09-30

Family

ID=6358650

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89108232A Expired - Lifetime EP0353402B1 (fr) 1988-07-14 1989-05-08 Procédé de production d'une bande d'acier ayant une épaisseur de moins de 10 mm

Country Status (9)

Country Link
US (1) US4962808A (fr)
EP (1) EP0353402B1 (fr)
KR (1) KR900701438A (fr)
DD (1) DD287433A5 (fr)
DE (2) DE3823861A1 (fr)
ES (1) ES2035419T3 (fr)
GR (1) GR3006093T3 (fr)
WO (1) WO1990000456A1 (fr)
ZA (1) ZA895014B (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5018666A (en) * 1989-12-01 1991-05-28 Cf&I Steel Corporation Unitary one quarter mile long railroad rail free of weld seams
US5503217A (en) * 1990-07-23 1996-04-02 Davy Mckee (Sheffield) Limited Method of manufacturing metal strip
DE4123956C2 (de) * 1991-07-19 1994-07-21 Thyssen Stahl Ag Verfahren und Anlage zum Herstellen eines Metallstranges durch Gießen
EP0535368B1 (fr) * 1991-09-19 1996-06-05 Sms Schloemann-Siemag Aktiengesellschaft Procédé et dispositif de coulée continue d'un lingot métallique
IT1262116B (it) * 1993-05-17 1996-06-19 Danieli Off Mecc Procedimento di prelaminazione controllata per bramme sottili uscenti da colata continua e dispositivo relativo
US5488987A (en) * 1991-10-31 1996-02-06 Danieli & C. Officine Meccaniche Spa Method for the controlled pre-rolling of thin slabs leaving a continuous casting plant, and relative device
AT398396B (de) * 1993-02-16 1994-11-25 Voest Alpine Ind Anlagen Verfahren zum herstellen eines bandes, vorstreifens oder einer bramme
DE4403049C1 (de) * 1994-01-28 1995-09-07 Mannesmann Ag Stranggießanlage und Verfahren zur Erzeugung von Dünnbrammen
DE4403048C1 (de) * 1994-01-28 1995-07-13 Mannesmann Ag Stranggießanlage und Verfahren zur Erzeugung von Rechteck-Dünnbrammen
DE19529046A1 (de) * 1995-07-31 1997-02-06 Mannesmann Ag Verfahren und Einrichtung zum Betreiben einer Stranggießanlage
AT410522B (de) * 2001-05-07 2003-05-26 Hulek Anton Verfahren und stranggiessanlage zum vertikalen stranggiessen eines stahlbandes
CH697624B1 (de) * 2005-02-23 2008-12-31 Main Man Inspiration Ag Walzeinrichtung für ein Inline-Walzen eines durch Bandgiessen, insbesondere Zweirollen-Bandgiessen hergestelltes Stahlband.
JP5371421B2 (ja) * 2005-04-07 2013-12-18 アルベディ，ジョバンニ 連続鋳造および圧延の間に連続性を分断することなく金属ストリップおよび金属シートを製造するプロセスおよびシステム
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

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT266362B (de) * 1966-04-22 1968-11-11 Boehler & Co Ag Geb Verfahren und Vorrichtung zur Herstellung von streckverformten Erzeugnissen aus hochschmelzenden Metallen, insbesondere aus unlegierten oder legierten Stählen mit verbesserten Qualitätseigenschaften
GB1199805A (en) * 1967-04-20 1970-07-22 British Iron Steel Research Continuous Casting
DE3400220A1 (de) * 1984-01-05 1985-07-18 SMS Schloemann-Siemag AG, 4000 Düsseldorf Kokille zum stranggiessen von stahlband
JPS61189850A (ja) * 1985-02-20 1986-08-23 Nippon Steel Corp 鋼のスラブ用連続鋳造方法
JPH0669605B2 (ja) * 1986-02-15 1994-09-07 新日本製鐵株式会社 鋳片から金属薄板を直接製造する方法
ES2031945T3 (es) * 1987-04-13 1993-01-01 Thyssen Stahl Aktiengesellschaft Procedimiento para la fabricacion de una cinta de acero.

Also Published As

Publication number Publication date
US4962808A (en) 1990-10-16
ZA895014B (en) 1990-04-25
EP0353402A1 (fr) 1990-02-07
DD287433A5 (de) 1991-02-28
ES2035419T3 (es) 1993-04-16
WO1990000456A1 (fr) 1990-01-25
DE58902362D1 (de) 1992-11-05
KR900701438A (ko) 1990-12-03
GR3006093T3 (fr) 1993-06-21
DE3823861A1 (de) 1990-01-18

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