US3721288A - Method of continuous casting of steel using an oscillating mold - Google Patents

Method of continuous casting of steel using an oscillating mold Download PDF

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Publication number
US3721288A
US3721288A US00105240A US3721288DA US3721288A US 3721288 A US3721288 A US 3721288A US 00105240 A US00105240 A US 00105240A US 3721288D A US3721288D A US 3721288DA US 3721288 A US3721288 A US 3721288A
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US
United States
Prior art keywords
mold
speed
ingot
oscillating
oscillation
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
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US00105240A
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English (en)
Inventor
G Vogt
K Wunnenberg
J Dubendorff
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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Filing date
Publication date
Application filed by Mannesmann AG filed Critical Mannesmann AG
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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
    • 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 present invention relates to a method for continuous casting of steel using a mold that undergoes oscillatory, sinusoidal movement in dependence upon the speed of withdrawing the ingot.
  • the solidified skin of developing cast ingot tends to adhere to the wall of the mold during withdrawal. In order to avoid such sticking, it is known to impart an oscillatory motion upon the mold.
  • sinusoidal oscillation is almost exclusively used today.
  • the oscillatory motion has up and down components and the instantaneous speed of the mold, when moving down, is made to temporarily exceed the ingots withdrawal speed. Note that the withdrawal speed of the ingot is not referenced to the mold exit but to a stationary reference.
  • the solidified shell or skin of the ingot (the ingot being still predominantly liquidous in its interior at that point), is alternately subjected to compression and tension forces.
  • the down stroke of the mold there is compression of the skin, particularly as the mold passes the ingot.
  • the compression provides welding action for closing any cracks or fissures that may have formed in the skin.
  • This period of compression when the mold moves down faster than the ingot, is usually maintained constant and within the range of 0.5 to 1.0 seconds, as has been suggested in a paper published in STAL (German language issue); l967, Vol. 10, pages 955 to 958.'
  • the problem solved by the present invention is to find a mode of operation that permits (a) rather high withdrawal speeds of the ingot at (b) periods of skin compression (when the mold velocity exceeds the withdrawal speed during a downstroke) shorter than the heretofore deemed limit of half a second.
  • the ratio of mold peak velocity-to-ingot withdrawal speed is to be within the range of about 1.4 to about 2.2.
  • the mold oscillation frequency should be about 40 to about 80 min for a compression period to remain between 0.2 to 0.4 seconds.
  • the ingot speed should be above 1.2 meter/minute and the displacement of the mold is selected to be proportional to the ingot withdrawal speed on basis of the said ratio and compression period as parameters in the proportionality relation. These parameters are to be constant during operation.
  • the FIGURE is a graph showing operating characteristics for an oscillating mold with ingot withdrawal speed plotted against maximum mold displacement, and oscillating frequency as parameter.
  • Vk Vg is derived as follows:
  • the mold velocity equals the ingot withdrawal speed twice in each cycle and the period between is the compression period t for the solidified skin of the ingot in the mold.
  • mold velocity V to ingot withdrawal speed Vg. f (7) denotes the expression in parenthesis and indicates to be only a function of that ratio 7.
  • Equation (3) teaches that the compression period is defined by that ratio 7 and by the oscillation frequency. Restating the relation,
  • this period At is available for welding any cracks as compression is imparted upon the skin of the ingot.
  • the ratio 7 of maximum mold speed to ingot withdrawal speed is to be selected to fall in the range from about 1.4 toabout 2.2.
  • the moldoscillation frequencyn is to be selected so that the compression period At is to be about 0.2 to 0.4 seconds. This requires the oscillation frequency n to be in the range from about 40 to above 80 min.
  • km n H combining (6) with chosen as one parameter for the particular family ofcurves plotted, with three different oscillation frequencies and compression periods At for crack welding as variable parameter.
  • the proportionality relation is within the range from H 6 Vg to about H 12 Vg, the proportionality factors being mm per meter per minute, H given in millimeters, withdrawal speed in meter per minute accordingly.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
US00105240A 1970-01-14 1971-01-11 Method of continuous casting of steel using an oscillating mold Expired - Lifetime US3721288A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702002366 DE2002366B1 (de) 1970-01-14 1970-01-14 Sinusfoermige Kokillenbewegung beim Stranggiessen

Publications (1)

Publication Number Publication Date
US3721288A true US3721288A (en) 1973-03-20

Family

ID=5760060

Family Applications (1)

Application Number Title Priority Date Filing Date
US00105240A Expired - Lifetime US3721288A (en) 1970-01-14 1971-01-11 Method of continuous casting of steel using an oscillating mold

Country Status (11)

Country Link
US (1) US3721288A (cs)
JP (1) JPS4926420B1 (cs)
AT (1) AT306268B (cs)
CA (1) CA937729A (cs)
CH (1) CH527659A (cs)
DE (1) DE2002366B1 (cs)
ES (1) ES387206A1 (cs)
FR (1) FR2076083B1 (cs)
GB (1) GB1326716A (cs)
NL (1) NL7100485A (cs)
SE (1) SE357903B (cs)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3965964A (en) * 1974-01-11 1976-06-29 Vereingte Osterreichische Eisen- Und Stahlwerke-Alpine Montan Aktiengesellschaft Method of continuously casting steel strands, in particular slabs
US4211270A (en) * 1978-07-28 1980-07-08 Kennecott Copper Corporation Method for continuous casting of metallic strands at exceptionally high speeds
US4450894A (en) * 1979-07-10 1984-05-29 Nippon Kokan Kabushiki Kaisha Method for horizontal type continuous casting
US4736789A (en) * 1978-07-28 1988-04-12 Kennecott Corporation Apparatus and method for continuous casting of metallic strands at exceptionally high speeds using an oscillating mold assembly

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5555665A (en) * 1978-09-22 1980-04-23 Canon Inc Forming unit of recording information
EP0325931B1 (de) * 1988-01-28 1992-04-22 Clecim Verfahren und Vorrichtung zum Oszillieren einer Stahlstranggiesskokille
DE19854329A1 (de) * 1998-11-25 2000-05-31 Schloemann Siemag Ag Verfahren zum Oszillieren einer Stranggießkokille mittels variabler Oszillationsparameter

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1266961A (fr) * 1960-09-08 1961-07-17 Concast Ag Procédé de coulée continue de métaux dans des coquilles de passage
FR1290183A (fr) * 1961-02-07 1962-04-13 Centre Nat Rech Metall Procédé et installation de coulée continue des métaux et produits conformes à ceux ainsi obtenus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3965964A (en) * 1974-01-11 1976-06-29 Vereingte Osterreichische Eisen- Und Stahlwerke-Alpine Montan Aktiengesellschaft Method of continuously casting steel strands, in particular slabs
US4211270A (en) * 1978-07-28 1980-07-08 Kennecott Copper Corporation Method for continuous casting of metallic strands at exceptionally high speeds
US4736789A (en) * 1978-07-28 1988-04-12 Kennecott Corporation Apparatus and method for continuous casting of metallic strands at exceptionally high speeds using an oscillating mold assembly
US4450894A (en) * 1979-07-10 1984-05-29 Nippon Kokan Kabushiki Kaisha Method for horizontal type continuous casting

Also Published As

Publication number Publication date
FR2076083B1 (cs) 1974-10-31
GB1326716A (en) 1973-08-15
FR2076083A1 (cs) 1971-10-15
ES387206A1 (es) 1973-05-01
NL7100485A (cs) 1971-07-16
JPS4926420B1 (cs) 1974-07-09
SE357903B (cs) 1973-07-16
AT306268B (de) 1973-04-10
DE2002366B1 (de) 1971-01-21
CA937729A (en) 1973-12-04
CH527659A (de) 1972-09-15

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