EP1144144A1 - Procede de production de billettes rondes - Google Patents

Procede de production de billettes rondes

Info

Publication number
EP1144144A1
EP1144144A1 EP99964428A EP99964428A EP1144144A1 EP 1144144 A1 EP1144144 A1 EP 1144144A1 EP 99964428 A EP99964428 A EP 99964428A EP 99964428 A EP99964428 A EP 99964428A EP 1144144 A1 EP1144144 A1 EP 1144144A1
Authority
EP
European Patent Office
Prior art keywords
horizontal
vertical
round
stitch
production
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.)
Granted
Application number
EP99964428A
Other languages
German (de)
English (en)
Other versions
EP1144144B1 (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

Links

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 process for the production of continuously cast billets in a production plant consisting of a vertical round casting system with a horizontal outlet, at least one descaling device and a plurality of subsequent rolling stands
  • austenitic, rust-free chromium-nickel steels have a partly high proportion of ⁇ -Fernt, which is a pronounced maximum in the case of round knobs at a distance of 0.4 to 0.7 x radius from the core and the forming capacity of these steels is greatly reduced in subsequent cross-rolling processes, since the main forming zone is located in this cross-sectional area.As a result, only low degrees of stretching can be achieved.
  • Another possibility is the electromagnetic stirring (EMS) of the solidifying melt in the strand with the advantage of breaking the solidifying crystallites, the mixing and the resulting fine globular solidification structure in a large inner area of the strand cross section.
  • EMS electromagnetic stirring
  • the disadvantage is that the area close to the surface is only to a small extent or is only detected in the event of strong stirring
  • Another disadvantage is the stationary arrangement of EMS.
  • a second stirrer is required in the lower part of the continuous casting plant for stirring the core area. Too strong stirring can also lead to core expansion due to the action of the centrifugal force
  • Width with still fluid core The advantage here is the greater pressure length that can be achieved during forging compared to rolling, which means that a greater degree of compaction of the core area can be achieved.Disadvantageous is the obvious limitation of the method to large cross-sections, since a forging unit is positioned in the area of the Continuous casting is not possible
  • the object of the present invention is then to find a method and an apparatus for producing round balls with a diameter between 90 and 300 mm, which, if used appropriately, have the disadvantage
  • the solidifying round dome is descaled on its surface after emerging from the mold and before entering the subsequent rolling unit and the surface layer near the surface is pre-cooled to an optimum temperature for the respective steel before the round dome is at least at first three successive horizontal stitches and finally in a vertical stitch, the surface of the pre-shaped stick being descaled again before the last stitch
  • the round dome solidifies in the horizontal outlet area of the production system at a location whose position is adjustable in the axial direction of the strand relative to the location of the horizontal forming
  • the diameter of the liquid core and the subsequent vertical stitch results in a material structure pre-deformed for subsequent forming process steps in an outer ring layer with a thickness of 2 half the radius with the core area almost completely compressed
  • the casting speed and / or the location of the location at which the vertical stitch takes place are controlled so that the bottom of the solidifying round dome in the
  • the area between the third horizontal stitch and the vertical stitch is maintained and complete solidification to the core is guaranteed at the latest when the vertical stitch is carried out
  • a device for carrying out the method according to the invention is characterized in that between the vertical round casting system and its horizontal outlet there is still one in the curved part of the guide frame P ⁇ marentzu matterssstrom and a multi-frame rolling unit with at least three consecutive horizontal frames are arranged and follow the horizontal frames in the horizontal part of the strand guide with respect to the position of the sump tip in the strand movement direction back and forth vertical frame with flanged secondary descaling device
  • the round knobs are descaled in the area of the sump tip at the end of the continuous casting arch, the surface layer near the surface is pre-cooled to a temperature that is optimal for the respective steel. Then a reshaping is carried out first in the at least three successive horizontal stitches and the final vertical stitch, the surface of the pre-deformed stick Descaling before the last stitch.
  • the reshaping in the horizontal and vertical direction creates the desired pre-deformed material structure with an almost completely compressed core area, which is favorable for the subsequent forming process stages
  • the number of horizontal scaffolds results from the diameter of the round dome, the casting speed and the realizable increase in the degree of deformation in the horizontal passages.
  • the solidification of the core area can be adjusted by selecting the distance from the last fixed horizontal scaffold
  • the last of the horizontal scaffolds can be designed to be adjustable under load in order to provide the correct preliminary profile for the subsequent vertical circular stitch in conjunction with a downstream measuring device for measuring the height and width of the preformed billet in the sense of an automatic roll gap control should be done so that the deformation is distributed as evenly as possible over the dome circumference while minimizing the tensile stresses on the surface, the compressive stress on the
  • Knuppel scholar is said to increase with the number of stitches and at the same time prevent spreading increased and the roundness and dimensional accuracy of the billet can be guaranteed after exiting the roller unit
  • the nozzles of the P ⁇ marentzu matterssein ⁇ chtung arranged in a ring around the round dome are supplied with water or a water-air mixture, the distance of the nozzles from the surface of the round dome and pressure and intensity of the medium hitting the surface of the round dome being adjustable
  • the secondary descaling device consisting of at least one nozzle is flanged to the vertical frame and can be moved with it.
  • the nozzles distributed around the circumference of the pre-deformed billet can be pressurized with compressed air, the distance of the nozzles from the surface of the pre-deformed billet and their distance from ring to ring and are optimized among themselves around the circumference of the ring
  • pores are closed depending on the steel quality, voids in their cross-sectional area are reduced by approx. 15-35% compared to the case without pre-deformation, concentration differences in the form of segregations,
  • the pre-deformation also improves the surface quality of the round billets and reduces the risk of slipping in a subsequent cross-rolling process.
  • the pre-deformed material structure enables a higher level in comparison to the continuous casting structure in subsequent deformation devices
  • FIG. 1 An exemplary embodiment of the production plant according to the invention for the production of deformed round casting is shown in the drawing and is described below With 1 is the vertical continuous casting system with a horizontal outlet, in the mold of which a round dome with a diameter of between 90 and 300 mm is poured and pulled downwards.
  • the round dome 2 is deflected in the arch structure of the system from the vertical to the horizontal direction and Treated in the manner according to the invention
  • the round dome which is still liquid on the inside, is descaled in a plasma descaling device and simultaneously cooled in order to create the surface conditions for the subsequent rolling deformation of the round dome.
  • the deformation takes place in a multi-step rolling unit 4, consisting of three successive horizontal roll stands 5, each with false round calibration from two merging radii
  • the last of the three horizontal roll stands can be adjusted under load and is equipped with a roll gap control which corresponds to the measuring device 8 for the height and width of the round billet
  • the bottom of the liquid core ends just behind the last of the horizontal rolling stands 5 of the rolling unit 4.
  • the round dome 2 is finally rolled in the vertical stand 6 after a secondary descaling at 7.
  • This vertical stand 6 can be moved in the direction of the arrow in order to adapt the location of its deformation to the position of the sump tip of the round dome 2 in such a way that the deformation always takes place in the solidified area of the round dome 2
  • the vertical framework 6 can be shifted in the casting direction or in the opposite direction, or the casting speed is changed accordingly, possibly in addition to the shifting of the vertical framework 6
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 true EP1144144A1 (fr) 2001-10-17
EP1144144B1 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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105363867A (zh) * 2015-09-25 2016-03-02 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

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* 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
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

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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
EP0804300B1 (fr) * 1994-10-20 1999-05-06 MANNESMANN Aktiengesellschaft Procede et dispositif de production d'une feuille d'acier presentant les proprietes d'un produit lamine a froid

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0037200A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105363867A (zh) * 2015-09-25 2016-03-02 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

Also Published As

Publication number Publication date
KR100658647B1 (ko) 2006-12-15
CN1170646C (zh) 2004-10-13
AU3031200A (en) 2000-07-12
CN1331616A (zh) 2002-01-16
BR9916414A (pt) 2001-09-18
WO2000037200A1 (fr) 2000-06-29
KR20010089679A (ko) 2001-10-08
DE59901981D1 (de) 2002-08-08
US6491771B1 (en) 2002-12-10
ES2176042T3 (es) 2002-11-16
CA2356609C (fr) 2008-03-25
CA2356609A1 (fr) 2000-06-29
JP4430828B2 (ja) 2010-03-10
ATE219977T1 (de) 2002-07-15
JP2002532259A (ja) 2002-10-02
DE19860570C1 (de) 2000-10-05
EP1144144B1 (fr) 2002-07-03

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