EP0325931B1 - Verfahren und Vorrichtung zum Oszillieren einer Stahlstranggiesskokille - Google Patents

Verfahren und Vorrichtung zum Oszillieren einer Stahlstranggiesskokille Download PDF

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Publication number
EP0325931B1
EP0325931B1 EP89100324A EP89100324A EP0325931B1 EP 0325931 B1 EP0325931 B1 EP 0325931B1 EP 89100324 A EP89100324 A EP 89100324A EP 89100324 A EP89100324 A EP 89100324A EP 0325931 B1 EP0325931 B1 EP 0325931B1
Authority
EP
European Patent Office
Prior art keywords
oscillation
region
strand
process according
withdrawal speed
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
EP89100324A
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German (de)
English (en)
French (fr)
Other versions
EP0325931A1 (de
Inventor
Manfred Dr. Wolf
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.)
Clecim SAS
Davy Distington Ltd
Original Assignee
Clecim SAS
Davy Distington Ltd
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 Clecim SAS, Davy Distington Ltd filed Critical Clecim SAS
Publication of EP0325931A1 publication Critical patent/EP0325931A1/de
Application granted granted Critical
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    • 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
    • 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/053—Means for oscillating the moulds

Definitions

  • the invention relates to a method and a device for oscillating a continuous steel casting mold according to the preambles of claims 1 and 9.
  • continuous molds are oscillated in order to introduce lubricant between the strand crust and the mold wall, as a result of which sticking of the strand crust is to be avoided or reduced.
  • the invention is therefore based on the object of providing an oscillation method for continuous steel casting which on the one hand improves the strand surface with respect to oscillation marks or reduces surface defects and at the same time permits great variability in the strand pull-out speed during casting and while a casting is in progress.
  • it should also be possible to produce adhesive grades with an improved strand surface and, with a high level of breakthrough security, casting speeds adapted to the casting cycle.
  • casting speeds should be made possible which go beyond the state of the art, e.g. 2 - 6 m / min for slabs or 4 - 10 m / min for billets and thin slabs.
  • the oscillation method according to the invention or the Oszil Lation device enable continuous casting with an improved strand surface, in particular if the strand pull-out speed has to be varied for procedural reasons or, for example, by predetermined cycle times in connection with the steel production.
  • the formation of oscillation marks is reduced.
  • Steel grades known as glue grades tend to reduce the tendency to crack in the oscillation marks in combination with appropriate lubricants.
  • Starting breakthroughs (bleedings) within the mold or breakthroughs outside the mold can be reduced.
  • the extrusion speeds known as casting speeds can be increased far beyond the conventional range with this method.
  • the oscillation frequency can be gradually increased in the first area with the increasing strand withdrawal speed.
  • the oscillation frequency can be raised in the first area while maintaining the lifting height.
  • An essential feature of the non-sinusoidal oscillation is the widely variable speed of the mold up and down movement within an oscillation cycle or within a certain stroke height. In the sense of a further process example, it is recommended to increase the oscillation frequency in the first area while maintaining the lifting height between 2 mm and 5 mm and in the second area to increase the lifting height between 2 and 12 mm in proportion to the line withdrawal speed.
  • a negative strip time t N 0.1-0.2 t c is proposed in the first area, where t c represents the time for an oscillation cycle.
  • FIG. 1 an oscillation cycle t c is shown in FIG. 1 in the path-time diagram.
  • H is the lifting height and t is the time.
  • Fig. 2 is dash-dotted with V c on the same time scale Line withdrawal speed, with V N the mold downward speed, which is substantially greater than V c during the entire downward stroke, and with V P the mold upward speed, ie during the upward stroke.
  • a time period t N represents the negative strip time and a time period t P the positive strip time.
  • the solidifying strand crust is subjected to a compressive stress and during the time period t P to a tensile stress.
  • a frequency range f in cpm (cycles per minute) is shown in a hatched field as a function of different line pull-out speeds.
  • This frequency range includes the frequencies according to the invention for different steel qualities.
  • the frequencies for steel grades with strong adhesive properties, or in other words, with a weak strand shell lie in the area of the bathroom mirror. These steel grades are also referred to as "adhesive grades”.
  • a steel from the group of adhesive grades is oscillated in the area 1 (indicated by the dimensional arrow) along the boundary line x, ie up to a strand withdrawal speed between 0.1 and approximately 1.2 m / min between 60 and 120 strokes per minute (cpm).
  • the oscillation frequency f remains constant at approximately 120 strokes per minute.
  • the lifting height h is, for example, proportional to the strand withdrawal speed between 2 and 20 mm, preferably between 4 and 10 mm increased at constant oscillation frequency.
  • the negative strip time t N is approximately 0.1 seconds in areas 1 and 2.
  • the frequency is increased in the area 1 along the boundary line y in the area 1 from 0.1 m / min to approximately 1.2 m / min from 120 to approximately 200 strokes per minute.
  • the frequency f remains constant at approximately 200 strokes per minute.
  • the lifting height in area 2 is increased, for example, in proportion to the strand withdrawal speed between 2 and 10 mm, preferably between 2 and 8 mm at a constant oscillation frequency.
  • the negative strip time t N is in the order of 0.1 seconds in the areas 1 and 2.
  • a mold is suspended from two short levers 6 and 7 at 5 and guided in its oscillating movement according to arrow 8.
  • 10 shows a raised foundation or a corresponding steel structure.
  • the short lever 7 is connected at its extension 9 to a hydraulic oscillation drive 11, only shown schematically.
  • a controller 12 ensures that the oscillation frequency f and the lifting height h of the oscillation drive 11 are set according to the program during the casting operation according to the stored programs in the computer 14. From the hydraulic control 12 is feedback 21 about the lau
  • the measured oscillation force determined the friction in the mold 5 and compared it with a predetermined friction value 22 in the discriminator 15.
  • the comparison signal 23 obtained, the setting of the negative strip time t N and the ratio t N to t c , the lifting height, the frequency etc. can be continuously optimized in the predetermined frame.
  • the friction can also be measured directly on the mold or on the lever arms of the oscillation drive using known devices, such as accelerometers, pressure gauges and / or strain gauges, and a combination of
  • the mold 5 can be provided with a known breakthrough warning device 25.
  • a signal 26 of the breakthrough warning 25 can directly influence the strand pull-off speed via a controller 18 and thereby prevent a strand breakthrough.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP89100324A 1988-01-28 1989-01-10 Verfahren und Vorrichtung zum Oszillieren einer Stahlstranggiesskokille Expired - Lifetime EP0325931B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH305/88 1988-01-28
CH30588 1988-01-28

Publications (2)

Publication Number Publication Date
EP0325931A1 EP0325931A1 (de) 1989-08-02
EP0325931B1 true EP0325931B1 (de) 1992-04-22

Family

ID=4183974

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89100324A Expired - Lifetime EP0325931B1 (de) 1988-01-28 1989-01-10 Verfahren und Vorrichtung zum Oszillieren einer Stahlstranggiesskokille

Country Status (8)

Country Link
US (1) US4883114A (ja)
EP (1) EP0325931B1 (ja)
JP (1) JP2727007B2 (ja)
KR (1) KR960013877B1 (ja)
CN (1) CN1012473B (ja)
CA (1) CA1323483C (ja)
DE (1) DE58901200D1 (ja)
ES (1) ES2032609T3 (ja)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2689045A1 (fr) * 1992-03-31 1993-10-01 Clecim Sa Procédé de coulée continue.
EP0570935A1 (en) * 1992-05-21 1993-11-24 Kawasaki Steel Corporation Control device for controlling mold oscillation in a continuous casting machine
GB2313798A (en) * 1995-03-07 1997-12-10 Davy Distington Ltd Continuous casting mould
US5823245A (en) * 1992-03-31 1998-10-20 Clecim Strand casting process
WO2000030783A1 (de) * 1998-11-25 2000-06-02 Sms Schloemann-Siemag Aktiengesellschaft Verfahren zum oszillieren einer stranggiesskokille mittels variabler oszillationsparameter

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5219029A (en) * 1992-03-09 1993-06-15 Gunther Behrends Oscillator for continuous casting mold
FR2704788B1 (fr) * 1993-05-04 1995-07-28 Clecim Sa Dispositif de commande des mouvements d'une lingotiere.
CN1062203C (zh) * 1997-08-07 2001-02-21 涟源钢铁集团有限公司 保持连铸拉速与结晶器振动频率相匹配的方法
US5911268A (en) * 1997-10-16 1999-06-15 Custom Systems, Inc. Oscillating mold table assembly
DE19823361A1 (de) * 1998-05-15 1999-11-25 Mannesmann Ag Verfahren und Vorrichtung zum Abziehen eines Metallstranges
CN102274933B (zh) * 2011-07-22 2013-04-17 中国科学院金属研究所 一种有效消除凝固坯料中心缺陷、细化凝固组织的方法
CN102688995B (zh) * 2012-06-13 2013-12-11 鞍钢股份有限公司 一种连铸结晶器振动台参数控制方法
AT517006B1 (de) * 2015-04-07 2018-08-15 Primetals Technologies Austria GmbH Stranggießen mit optimierter Oszillation der Stranggießkokille
CN107511465B (zh) * 2017-07-13 2019-04-05 中冶连铸技术工程有限责任公司 一种通过振动方式实现连铸高拉速的工艺方法
RU2700979C1 (ru) * 2018-10-23 2019-09-24 Публичное акционерное общество "Северсталь" (ПАО "Северсталь") Способ непрерывной разливки стали
CN109773146B (zh) * 2019-01-11 2021-03-16 中冶赛迪技术研究中心有限公司 一种直驱式电液伺服结晶器振动曲线优化控制方法
CN114918392A (zh) * 2022-04-29 2022-08-19 重庆钢铁股份有限公司 一种方坯连铸结晶器振动控制方法

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2002366B1 (de) * 1970-01-14 1971-01-21 Mannesmann Ag Sinusfoermige Kokillenbewegung beim Stranggiessen
ATE2487T1 (de) * 1979-12-19 1983-03-15 Concast Holding Ag Vorrichtung zum oszillieren einer stranggiesskokille.
JPS6021811B2 (ja) * 1980-03-19 1985-05-29 新日本製鐵株式会社 連続鋳造における鋳型と鋳片間の潤滑状態制御方法
JPS57115948A (en) * 1981-01-09 1982-07-19 Nippon Steel Corp Continuous casting method
JPS59166358A (ja) * 1983-03-14 1984-09-19 Sumitomo Metal Ind Ltd 連続鋳造方法
US4615375A (en) * 1983-04-18 1986-10-07 United States Steel Corporation Continuous casting mold friction monitor
JPS606248A (ja) * 1983-06-27 1985-01-12 Nippon Kokan Kk <Nkk> 連続鋳造用鋳型の振動方法
JPS6087955A (ja) * 1983-10-18 1985-05-17 Nippon Kokan Kk <Nkk> 竪型連続鋳造用鋳型の振動方法
DE3343479C1 (de) * 1983-12-01 1984-08-23 Fried. Krupp Gmbh, 4300 Essen Verfahren zum Oszillieren einer in sich starren Horizontal-Stranggiesskokille fuer Metalle,insbesondere Stahl
JPS6123559A (ja) * 1984-07-12 1986-02-01 Nippon Kokan Kk <Nkk> 鋼の連続鋳造用鋳型の振動方法
JPS61162256A (ja) * 1985-01-08 1986-07-22 Nippon Kokan Kk <Nkk> 連続鋳造鋳片の表面性状改善方法
JPS62296945A (ja) * 1986-06-16 1987-12-24 Nisshin Steel Co Ltd 溶鋼の連続鋳造方法
JPH0687955A (ja) * 1991-09-13 1994-03-29 Nippon Peroxide Co Ltd シクロヘキセンオキサイドの重合方法
JP2816061B2 (ja) * 1992-10-01 1998-10-27 シャープ株式会社 フレキシブル基板の実装方法
JPH06123559A (ja) * 1992-10-12 1994-05-06 Mitsui Mining & Smelting Co Ltd 内外同時焼成式ドーム型セラミック製品の焼成炉

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2689045A1 (fr) * 1992-03-31 1993-10-01 Clecim Sa Procédé de coulée continue.
EP0564316A1 (fr) * 1992-03-31 1993-10-06 Clecim Procédé de coulée continue
US5823245A (en) * 1992-03-31 1998-10-20 Clecim Strand casting process
EP0570935A1 (en) * 1992-05-21 1993-11-24 Kawasaki Steel Corporation Control device for controlling mold oscillation in a continuous casting machine
US5350005A (en) * 1992-05-21 1994-09-27 Kawasaki Steel Corporation Control device for controlling mold oscillation in a continuous casting machine
GB2313798A (en) * 1995-03-07 1997-12-10 Davy Distington Ltd Continuous casting mould
GB2313798B (en) * 1995-03-07 1998-09-23 Davy Distington Ltd Continuous casting mould
WO2000030783A1 (de) * 1998-11-25 2000-06-02 Sms Schloemann-Siemag Aktiengesellschaft Verfahren zum oszillieren einer stranggiesskokille mittels variabler oszillationsparameter

Also Published As

Publication number Publication date
KR890011650A (ko) 1989-08-21
JPH01224155A (ja) 1989-09-07
CN1036157A (zh) 1989-10-11
DE58901200D1 (de) 1992-05-27
CA1323483C (en) 1993-10-26
KR960013877B1 (ko) 1996-10-10
JP2727007B2 (ja) 1998-03-11
ES2032609T3 (es) 1993-02-16
US4883114A (en) 1989-11-28
CN1012473B (zh) 1991-05-01
EP0325931A1 (de) 1989-08-02

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