EP1144144B1 - Procede et dispositif de production de billettes rondes - Google Patents

Procede et dispositif de production de billettes rondes Download PDF

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Publication number
EP1144144B1
EP1144144B1 EP99964428A EP99964428A EP1144144B1 EP 1144144 B1 EP1144144 B1 EP 1144144B1 EP 99964428 A EP99964428 A EP 99964428A EP 99964428 A EP99964428 A EP 99964428A EP 1144144 B1 EP1144144 B1 EP 1144144B1
Authority
EP
European Patent Office
Prior art keywords
horizontal
round
vertical
billet
strand
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
EP99964428A
Other languages
German (de)
English (en)
Other versions
EP1144144A1 (fr
Inventor
Ingo Von Hagen
Harald Wehage
Uwe Quitmann
Walter Weischedel
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 Siemag AG
Original Assignee
SMS Demag 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 SMS Demag AG filed Critical SMS Demag AG
Publication of EP1144144A1 publication Critical patent/EP1144144A1/fr
Application granted granted Critical
Publication of EP1144144B1 publication Critical patent/EP1144144B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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

Definitions

  • the invention relates to a method and a device for producing continuously cast billets in one from a vertical continuous caster with a horizontal outlet, at least a descaling device and several subsequent rolling stands existing production facility.
  • Billets produced in a vertical continuous caster with a horizontal outlet in the solidified state show material concentration differences above the Cross section on. In almost all steels, porous areas occur below the Surface and in the core area. Free-cutting steels are particularly affected. Carbon-manganese steels have segregations in the core area that make them from Z. B. complicate high-strength wires. It happens with high-carbon chrome steels for the formation of fluff in the core area, e.g. the quality of the inner surface of deteriorate rolled pipes of high precision.
  • Austenitic stainless chrome-nickel steels have a high level depending on the chemical composition Proportion of 8-ferrite as the second phase, which is pronounced in the case of round billets Maximum at a distance of 0.4 to 0.7 x radius from the core and that The formability of these steels is strong in subsequent cross rolling processes reduced because the main forming zone is located in this cross-sectional area. As As a result, only low degrees of stretching can be achieved. From an average 8-ferrite content of > 4% there are general problems of formability in the form of cracks and shells.
  • EMS electromagnetic stirring
  • the disadvantage is that the Area near the surface is detected only to a small extent or only with vigorous stirring becomes.
  • Another disadvantage is the stationary arrangement of EMS. So for that Stir the core area a second stirrer in the lower part of the continuous caster needed. Stirring too much can also cause core expansion due to the action of Conduct centrifugal force.
  • the solidifying Round billets after leaving the mold and before entering the next one Descaled roller unit on its surface and the surface layer near the surface is pre-cooled to an optimal temperature for the respective steel the stick in at least three successive horizontal stitches and finally reshaped in a vertical stitch, the surface of the pre-deformed billet is descaled before the last stitch.
  • the concentration differences across the cross-section e.g. in shape from segregations and second phases and their content greatly reduced becomes.
  • the material density is determined by removing pores under the surface and in the Core area increased.
  • the Pouring speed and / or the location of the place where the vertical stitch takes place so be controlled so that the swamp tip of the solidifying round stick in the The area between the third horizontal stitch and the vertical stitch lies and Complete solidification until at the latest when the vertical stitch is carried out to the core is guaranteed.
  • This is an apparatus for performing the method according to the invention characterized in that between the vertical continuous caster and their horizontal outlet still in the arch part of the guide frame Primary descaling system and a multi-stand rolling unit with at least three successive horizontal stands are arranged and the horizontal stands in the horizontal part of the strand guide based on the position of the sump tip in Strand movement direction back and forth movable vertical frame with follow the attached descaling device.
  • the round billets are in the area of the swamp tip at the end of the continuous casting arch first descaled, the surface layer near the surface is defined for one for the optimal temperature pre-cooled for each steel. Then there is one Forming first in the at least three successive horizontal stitches and the final vertical stitch, the surface of the pre-deformed Is descaled again before the last stitch.
  • the number of horizontal stands results from the diameter of the billet, the casting speed and the realizable increase in the degree of vertical deformation in the horizontal stitches.
  • the solidification of the core area is by choosing the Distance from the last fixed horizontal frame to the movable one Vertical frame completed. This allows the round shape of the stick in only a vertical stitch with increased decrease.
  • the last of the Horizontal scaffolds can be designed to be adjustable in interaction with a downstream measuring device for measuring the height and width of the preformed The right pre-profile for billets in the sense of an automatic roll gap control to deliver the subsequent vertical circular stitch.
  • the setting should be made so that the forming as uniformly as possible over the billet circumference while minimizing the tensile stress is distributed on the surface, the compressive stress on the Stick egg center is said to increase with the number of stitches and at the same time prevent spreading increases and the roundness and dimensional accuracy of the stick after exiting the Rolling unit can be guaranteed.
  • the nozzles arranged in a ring around the round billet the primary descaling device with water or a water-air mixture supplied, the distance of the nozzles from the surface of the billet as well Pressure and intensity of the medium hitting the surface of the stick are optimized adjustable.
  • the secondary descaling device consisting of at least one nozzle ring is flanged to the vertical scaffold and can be moved with it.
  • the around the scope of the pre-deformed billets distributed in the horizontal stands are included Compressed air can be applied, the distance of the nozzles from the surface of the preformed billets and their distance from ring to ring and among themselves around the Ring circumference are optimized.
  • the pre-deformation and Compression of the continuously cast primary material become pores closed, blowholes in their cross-sectional area by approx. 15 - 35% compared to the case reduced without pre-deformation. Differences in concentration in the form of segregations, Separations, second phases reduced and their content absolutely reduced.
  • the pre-deformation also increases the surface quality of the billets improved and the risk of slipping in a subsequent cross rolling process reduced.
  • the pre-deformed material structure enables compared to Continuous casting structure in subsequent shaping devices a higher one Degree of stretching due to higher forming capacity.
  • the vertical round caster with horizontal outlet is designated, in the mold is a round billet with a diameter of between 90 and 300 mm poured and pulled down.
  • the round stick 2 is in the
  • the scaffold of the plant is redirected from the vertical to the horizontal direction treated in the manner according to the invention.
  • the deformation takes place in one multi-stand rolling unit 4 consisting of three consecutive Horizontal rolling stands 5, each with false round calibration from two one inside the other passing radii.
  • the last of the three horizontal stands is under load adjustable and provided with a roll gap control, which with the measuring device 8 for the height and width of the round stick correspond.
  • a final descaling takes place at 7 after a secondary descaling Rolling the billet 2 in the vertical stand 6.
  • This vertical stand 6 is in Arrow direction slidable to the location of its deformation at the location of the Adjust swamp tip of the round stick 2 so that the deformation is always in solidified area of the round stick 2 takes place.
  • the location of the swamp tip can vary change according to casting speed, material and dimensions of the billet 2. In this case, the vertical frame 6 in the casting direction or in the opposite direction be shifted, or the casting speed is corresponding, possibly additional changed to shift the vertical frame 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Continuous Casting (AREA)
  • Forging (AREA)
  • Fish Paste Products (AREA)

Claims (8)

  1. Procédé de fabrication de billettes coulées en continu dans une installation de production formée par une installation de coulée continue courbe verticale à sortie horizontale, au moins une unité de décalaminage et plusieurs cages de laminage successives, caractérisé en ce que, pour la fabrication de billettes rondes avec un diamètre compris entre 90 et 300 mm, la billette à section circulaire se solidifiant est décalaminée sur sa surface en sortie de la lingotière et avant l'entrée dans le laminoir consécutif, et la peau est refroidie au préalable à une température optimale définie pour chaque acier, avant que la billette à section circulaire n'entre dans le laminoir où elle subit tout d'abord au moins trois réductions dans les cages horizontales successives et ensuite une réduction dans la cage verticale, la surface de la billette dégrossie étant à nouveau décalaminée avant la dernière passe.
  2. Procédé selon la revendication 1, caractérisé en ce que le brin à section circulaire est laminé dans les passes horizontales avec des taux de déformation croissants de ϕ = 0,01 à 0,15 avec diminution simultanée du diamètre du coeur fluide en raison de la solidification progressive, et la passe verticale est exécutée après solidification à coeur complète de la billette à section circulaire dans la zone de sortie horizontale de l'installation de production, dans une zone, dont la position peut être décalée, dans la direction axiale de la barre, par rapport à la zone de laminage horizontal.
  3. Procédé selon les revendications 1 et 2, caractérisé en ce que la vitesse de coulée et/ou la position de la zone de la passe verticale sont réglées de telle sorte que l'extrémité du bassin de coulée de la billette à section circulaire se solidifiant se situe dans la zone entre la troisième passe horizontale et la passe verticale et qu'une solidification à coeur complète est garantie au plus tard au moment de l'exécution de la passe verticale.
  4. Dispositif destiné à la mise en oeuvre du procédé de fabrication de billettes coulées en continu dans une installation de production formée par une installation de coulée continue courbe verticale à sortie horizontale, au moins une unité de décalaminage et plusieurs cages de laminage successives, caractérisé en ce qu'une installation de décalaminage primaire (3) et un laminoir (4) à pluralité de cages comportant au moins trois cages horizontales (5) successives, sont disposés entre l'installation de coulée continue courbe verticale (1) et sa sortie horizontale, encore dans la partie courbe de la cage de guidage, et, dans la partie horizontale du guidage de la barre, en aval des cages de laminage horizontales (5), est montée une cage de laminage verticale (6), mobile vers l'avant et l'arrière par rapport à l'extrémité du bassin de coulée dans le sens de déplacement de la barre, et contre laquelle est bridée une installation de décalaminage secondaire (7).
  5. Dispositif selon la revendication 4, caractérisé en ce que les cylindres de laminage des cages horizontales (5) sont munis chacun d'une cannelure excentrée, formée par deux rayons se fondant l'un dans l'autre, la dernière cage horizontale (5) est munie d'un réglage sous charge de l'emprise et les cylindres de la cage verticale (6) sont munis d'une cannelure circulaire ouverte.
  6. Dispositif selon la revendication 4 ou 5, caractérisé en ce que les buses de l'unité de décalaminage primaire (3), disposées en anneau autour de la billette à section circulaire (2), sont alimentées en eau ou en un mélange d'eau et d'air, et la distance entre les buses et la surface de la billette à section circulaire (2), ainsi que la pression et l'intensité du fluide amené sur la surface de la billette à section circulaire (2) peuvent être réglées de manière optimale.
  7. Dispositif selon la revendication 4 ou 5, caractérisé en ce que l'unité de décalaminage secondaire (7), formée par au moins un anneau de buses, est bridée contre la cage de laminage verticale (6) et peut être déplacée avec celle-ci, et de l'air comprimé est injecté dans les buses réparties autour de la périphérie de la billette à section circulaire (2) dégrossie dans les cages horizontales (5), sachant que la distance entre les buses et la surface de la billette à section circulaire (2) dégrossie, ainsi que la distance entre les anneaux de buses et entre les buses elles-mêmes sur la périphérie des anneaux sont optimisées.
  8. Dispositif selon la revendication 7, caractérisé en ce que la dernière cage horizontale (5) peut être mise sous charge.
EP99964428A 1998-12-22 1999-12-07 Procede et dispositif de production de billettes rondes Expired - Lifetime EP1144144B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19860570 1998-12-22
DE19860570A DE19860570C1 (de) 1998-12-22 1998-12-22 Verfahren zur Erzeugung von runden Knüppeln
PCT/DE1999/003959 WO2000037200A1 (fr) 1998-12-22 1999-12-07 Procede de production de billettes rondes

Publications (2)

Publication Number Publication Date
EP1144144A1 EP1144144A1 (fr) 2001-10-17
EP1144144B1 true EP1144144B1 (fr) 2002-07-03

Family

ID=7893020

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99964428A Expired - Lifetime EP1144144B1 (fr) 1998-12-22 1999-12-07 Procede et dispositif de production de billettes rondes

Country Status (12)

Country Link
US (1) US6491771B1 (fr)
EP (1) EP1144144B1 (fr)
JP (1) JP4430828B2 (fr)
KR (1) KR100658647B1 (fr)
CN (1) CN1170646C (fr)
AT (1) ATE219977T1 (fr)
AU (1) AU3031200A (fr)
BR (1) BR9916414A (fr)
CA (1) CA2356609C (fr)
DE (2) DE19860570C1 (fr)
ES (1) ES2176042T3 (fr)
WO (1) WO2000037200A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10325955A1 (de) * 2003-06-07 2004-12-23 Sms Demag Ag Verfahren und Anlage zum Erzeugen von Stahlprodukten mit bester Oberflächenqualität
CN100382906C (zh) * 2005-04-21 2008-04-23 天津钢铁有限公司 高碳钢盘条生产工艺技术
CN100560250C (zh) * 2007-10-29 2009-11-18 江阴兴澄特种钢铁有限公司 在R12～14m的弧形连铸机上生产特大规格圆坯的连铸工艺
EP2263816A1 (fr) * 2009-06-03 2010-12-22 Concast Ag Procédé et système pour guider et redresser une brame dans une machine à coulée continue pour des produits rondes de forte section
CN101885133B (zh) * 2010-07-15 2012-05-09 武汉钢铁(集团)公司 一种提高钢材组织均匀性方法及其设备
CN105209194B (zh) * 2013-06-20 2017-03-08 新日铁住金株式会社 铸坯的连续铸造方法
CN103894572B (zh) * 2014-04-10 2016-09-07 北京科技大学 一种连铸坯预处理方法
CN105363867B (zh) * 2015-09-25 2018-01-05 石家庄安瑞科气体机械有限公司 大容积厚壁高压储氢钢内胆的加工工艺
CN110181018B (zh) * 2018-05-17 2022-01-14 江阴兴澄特种钢铁有限公司 一种连铸坯厚度在线测量及压下量调整系统
KR102170939B1 (ko) * 2018-11-27 2020-10-29 주식회사 포스코 압연소재 처리설비 및 처리방법
CN109622904B (zh) 2019-02-01 2020-06-02 东北大学 一种实现连铸圆坯凝固过程芯部压下工艺的装置及方法
CN110385410A (zh) * 2019-08-01 2019-10-29 中冶赛迪工程技术股份有限公司 一种连铸设备及其工艺
CN113333707B (zh) * 2021-06-11 2022-08-05 陕钢集团汉中钢铁有限责任公司 一种r10米弧连铸机无夹持段浇注矩形坯的方法
CN114054700B (zh) * 2021-10-15 2022-11-15 东北大学 圆坯的压下方法及装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT280191B (de) * 1966-12-01 1970-04-10 Gerb Boehler & Co Ag Verfahren zur Herstellung von Walzprodukten aus Stranggußerzeugnissen mit Hilfe von zwei Walzenpaaren
JPS6186057A (ja) * 1984-10-05 1986-05-01 Nippon Kokan Kk <Nkk> 丸ビレツトの連続鋳造方法
JPH069707B2 (ja) * 1988-10-28 1994-02-09 新日本製鐵株式会社 連続鋳造鋼片の脱スケール方法
DE4010963A1 (de) * 1990-04-05 1991-10-10 Schloemann Siemag Ag Vorrichtung zur beseitigung von zunder und/oder schlacke an den oberflaechen eines metallgiessstranges
DE4123956C2 (de) * 1991-07-19 1994-07-21 Thyssen Stahl Ag Verfahren und Anlage zum Herstellen eines Metallstranges durch Gießen
JP3807628B2 (ja) * 1994-10-20 2006-08-09 マンネスマン・アクチエンゲゼルシャフト 冷間圧延特性を有する帯鋼製造方法及び装置

Also Published As

Publication number Publication date
ES2176042T3 (es) 2002-11-16
AU3031200A (en) 2000-07-12
DE59901981D1 (de) 2002-08-08
KR20010089679A (ko) 2001-10-08
ATE219977T1 (de) 2002-07-15
DE19860570C1 (de) 2000-10-05
CN1170646C (zh) 2004-10-13
JP2002532259A (ja) 2002-10-02
JP4430828B2 (ja) 2010-03-10
WO2000037200A1 (fr) 2000-06-29
EP1144144A1 (fr) 2001-10-17
CN1331616A (zh) 2002-01-16
BR9916414A (pt) 2001-09-18
KR100658647B1 (ko) 2006-12-15
US6491771B1 (en) 2002-12-10
CA2356609C (fr) 2008-03-25
CA2356609A1 (fr) 2000-06-29

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