EP1025928A1 - Stranggiessverfahren, hiermit korrespondierende Kokille und hiermit korrespondierende Stranggiessvorrichtung - Google Patents
Stranggiessverfahren, hiermit korrespondierende Kokille und hiermit korrespondierende Stranggiessvorrichtung Download PDFInfo
- Publication number
- EP1025928A1 EP1025928A1 EP00100949A EP00100949A EP1025928A1 EP 1025928 A1 EP1025928 A1 EP 1025928A1 EP 00100949 A EP00100949 A EP 00100949A EP 00100949 A EP00100949 A EP 00100949A EP 1025928 A1 EP1025928 A1 EP 1025928A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strand
- mold
- withdrawal direction
- strand withdrawal
- 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.)
- Withdrawn
Links
- 238000009749 continuous casting Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000007711 solidification Methods 0.000 claims abstract description 48
- 230000008023 solidification Effects 0.000 claims abstract description 48
- 239000002184 metal Substances 0.000 claims description 32
- 229910052751 metal Inorganic materials 0.000 claims description 32
- 239000011819 refractory material Substances 0.000 claims 1
- 239000000155 melt Substances 0.000 abstract 2
- 239000007788 liquid Substances 0.000 description 6
- 239000002826 coolant Substances 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000003716 rejuvenation Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/053—Means for oscillating the moulds
Definitions
- It also relates to a mold with mold walls into which a molten metal is pourable and from it a strand shell in a strand withdrawal direction is removable from the mold, wherein the mold an upper seen in the direction of strand withdrawal and a lower first solidification area, as seen in the strand withdrawal direction and the lower first solidification area runs essentially parallel to the strand withdrawal direction.
- It also relates to a continuous casting device with a Strand take-off device, by means of which the strand shell in the strand withdrawal direction is removable from the mold, and a lifting device, by means of which the mold relative to Strand shell alternately in and against the strand withdrawal direction is oscillatable.
- the continuous shell solidifies on the mold walls.
- the connection to an already frozen one Strand shell is done proportionally small area that runs transversely to the strand withdrawal direction. The force must be transmitted over this small area which to overcome the static friction of the newly solidified Strand shell must be applied to the mold walls.
- the object of the present invention is a Continuous casting process, a corresponding mold and a corresponding continuous casting device create a better connection between the already solidified strand shell and the newly solidified strand shell is created so that the risk of glue is reduced is.
- the task is solved for the continuous casting process by that the strand shell solidified in the upper first solidification area during the counter movement transversely to the strand withdrawal direction seen from the mold walls and from the molten metal is washed around.
- the upper first solidification area of the mold a smaller mold cross section than that lower solidification area.
- the continuous casting device is characterized in that it has a mold designed accordingly.
- the strand withdrawal direction can run horizontally.
- the mold is usually stationary, while the metal strand temporarily moved against the strand withdrawal direction becomes.
- the strand withdrawal direction runs perpendicular.
- the mold usually oscillates, while the metal strand or strand shell is continuous is withdrawn from the mold.
- a lifting device For example, a hydraulic lifting cylinder can be used.
- the mold can also in other ways, for. B. means a motor-driven eccentric can be oscillated.
- the mold is possible.
- the upper solidification area is at least in seen a section against the strand withdrawal direction continuously rejuvenated.
- a paragraph is arranged in the lower first solidification area his. In this case there is a particularly low risk of cracking, if the paragraph seen from the molten metal is convex.
- the upper one First solidification area seen on his in the strand withdrawal direction beveled at the top.
- the attachment can have an attachment cross-section have less than the mold cross-section of the upper solidification range.
- the essay can also chamfered at its lower end as seen in the direction of the strand withdrawal his.
- the mold 4 has mold walls 5 on which the molten metal 1 initially solidified into a strand shell 6.
- the strand shell 6 with the liquid core 6 ' is by means of a strand withdrawal device 7, e.g. B. take-off rollers 7, in a strand withdrawal direction x withdrawn from the mold 4. Outside the mold 4
- the liquid core 6 'then also solidifies, so that the liquid core 6 'together with the strand shell 6 a solidified metal strand 6 '' forms.
- the mold walls 5 are usually made of copper. You can choose one or more pieces his.
- the strand shell 6 is withdrawn continuously.
- mold 4 oscillates, as by a double arrow A is indicated in Figure 1.
- the oscillation is with a Lifting device 8 causes.
- the lifting device 8 can for example as a hydraulic cylinder unit 8 with a hydraulic cylinder 8 'and a hydraulic piston 8' '.
- the lifting device 8 can for example as a hydraulic cylinder unit 8 with a hydraulic cylinder 8 'and a hydraulic piston 8' '.
- the hydraulic piston 8 '' extends from the hydraulic cylinder 8 ' is, the mold 4 moves against Strand withdrawal direction x.
- the mold 4 thus leads in this Period a counter movement against the direction of strand withdrawal x off. If, however, the hydraulic piston 8 '' in the hydraulic cylinder 8 'is retracted, the mold 4 moves Strand withdrawal direction x. So it leads to a co-movement in Extraction direction x off.
- the strand withdrawal direction x is perpendicular. This is particularly evident from the fact that the metal strand 6 ′′ bent below the strand take-off device 7 becomes. In principle, it would also be possible that the Extraction direction x runs horizontally. In this case the mold 4 would be stationary, so it would not oscillate. The required relative movement between mold 4 and Strand shell 6 would then be moved by moving the Strand shell 6 or the metal strand 6 '' are effected.
- the mold 4 extends in the strand withdrawal direction x a considerable length, e.g. B. one meter.
- the oscillation stroke the mold 4, however, is only a few millimeters.
- the mold 4 therefore has one First solidification area 9.
- the metal melt solidifies during the co-movement 1 to a new section of the strand shell 6.
- the metal melt 1 which has just solidified thereby also welds the already formed strand shell 6 and thus forms a new one Piece of strand shell 6.
- the mold 4 has a guide area 10, who always only with the strand shell 6, but not with the liquid molten metal 1 comes into contact.
- a cooling medium 11 is fed in at its lower end.
- the cooling medium 11 is up to the first solidification area 9 led. There it then becomes from the mold walls 5 fed out again.
- the cooling medium 11 can, for example Be water.
- a lubricant 13 between the already solidified Strand shell 6 and the mold walls 5 can be fed. It is thus possible to increase the friction in the mold 4 improve.
- the feed of the lubricant 13 is only optional and always takes place below the solidification area 9.
- an attachment 14 is made on the mold walls 5 fireproof material.
- the attachment 14 has a Basic element 15 and a replaceable, directly from the molten metal 1 contacted wear element 16.
- the first solidification area 9 is in accordance with FIG Strand withdrawal direction x seen first solidification area 17 and a first solidification area, seen in the strand withdrawal direction x 18 divided.
- the lower solidification area 18 runs essentially parallel to Strand withdrawal direction x.
- the upper first solidification area 17 obviously has a smaller mold cross section than the lower first solidification area 18. This can, for example can be caused by the fact that - as shown in Figure 3 - the upper first solidification area 17 is in a partial section 19 seen against the strand withdrawal direction x continuously rejuvenated. Seen on his in the pull-off direction x the upper end is the upper first solidification area 18 above it chamfered out.
- This configuration of the mold 4 ensures that the strand shell solidified in the upper first solidification region 17 6 during the counter-movement transversely to the strand withdrawal direction x seen from the mold walls 5 releases.
- the just now solidified strand shell 6 is thus essentially on all sides then washed by the molten metal 1. In particular, penetrates Molten metal 1 in the area between the strand shell 6 and the mold walls 5 a. This is schematic in the figures 4 to 6 shown.
- Figure 4 shows the situation immediately before the start of the Countermovement. At this point it has become in the solidification area 9 a new strand shell 6 formed with the old strand shell 6 is welded. During the counter movement - See Figure 5 - the strand shell 6 slides in the strand withdrawal direction x. This forms a nose 19 that is seen transversely to the strand withdrawal direction x from the mold walls 5 solves. This nose 19 is therefore essentially all-round washed by the molten metal 1. The nose 19 corresponds the section of the newly formed strand shell 6 that in the upper First solidification area 17 is solidified.
- the attachment 14 has an attachment cross section that is smaller than the mold cross section of the upper solidification area 17 is. Furthermore, the attachment 14 is on his chamfered lower end seen in strand withdrawal direction x. Because of these two measures, there is a risk that in Transition area between attachment 14 and solidification area 9 comes to a freeze of the molten metal 1, very much low. This applies to a new article 14 as well with an already partially worn attachment 14.
- FIG. 7 now shows an alternative embodiment of the first solidification area 9.
- a paragraph 20 is arranged between the top and bottom First solidification area 17, 18 .
- Figure 8 shows the design of the strand shell 6 along with its nose 19 for this shape of the first solidification area 9.
- FIG. 3 and FIG. 7 are not completely alternative to one another. Possibly they can also be combined with each other.
- the invention is suitable for all types of casting cross sections. According to the embodiment, it is used in the production of a tape used. Likewise, the metal strand 6 '' but also the shape of a rectangular, square or round billets, a bob or other strand cross-sections exhibit.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
Description
- wobei eine Strangschale in einer Strangabzugsrichtung aus einer Kokille mit Kokillenwänden abgezogen wird,
- wobei die Kokille relativ zur Strangschale abwechselnd eine Mitbewegung in Strangabzugsrichtung und eine Gegenbewegung entgegen der Strangabzugsrichtung ausführt,
- wobei während der Gegenbewegung eine Metallschmelze in einem in Strangabzugsrichtung gesehen oberen und einem in Strangabzugsrichtung gesehen unteren Ersterstarrungsbereich an die Kokillenwände fließt und dort während der Mitbewegung zur Strangschale erstarrt.
- Figur 1
- eine Stranggießvorrichtung,
- Figur 2
- eine Kokille,
- Figur 3
- einen Ausschnitt von Figur 2,
- Figuren 4 - 6
- eine mit einer Metallschmelze gefüllte Kokille gemäß Figur 3 in verschiedenen Zuständen,
- Figur 7
- einen Ausschnitt von Figur 2 und
- Figur 8
- eine mit einer Metallschmelze gefüllte Kokille gemäß Figur 7 unmittelbar nach der Gegenbewegung.
- 1
- Metallschmelze
- 2
- Gießgefäß
- 3
- Tauchrohr
- 4
- Kokille
- 5
- Kokillenwände
- 6
- Strangschale
- 6'
- Flüssigkern
- 6''
- Metallstrang
- 7
- Strangabzugseinrichtung
- 9
- Hubvorrichtung
- 8'
- Hydraulikzylinder
- 8''
- Hydraulikkolben
- 9,17,18
- Ersterstarrungsbereiche
- 10
- Führungsbereich
- 11
- Kühlmedium
- 12
- Einspeisestelle
- 13
- Schmiermedium
- 14
- Aufsatz
- 15
- Grundelement
- 16
- Verschleißelement
- 19
- Nase
- 20
- Absatz
- A
- Doppelpfeil
- x
- Strangabzugsrichtung
Claims (12)
- Stranggießverfahren,dadurch gekennzeichnet,wobei eine Strangschale (6) in einer Strangabzugsrichtung (x) aus einer Kokille (4) mit Kokillenwänden (5) abgezogen wird,wobei die Kokille (4) relativ zur Strangschale (6) abwechselnd eine Mitbewegung in Strangabzugsrichtung (x) und eine Gegenbewegung entgegen der Strangabzugsrichtung (x) ausführt,wobei während der Gegenbewegung eine Metallschmelze (1) in einem in Strangabzugsrichtung (x) gesehen oberen und einem in Strangabzugsrichtung (x) gesehen unteren Ersterstarrungsbereich (17, 18) an die Kokillenwände (5) fließt und dort während der Mitbewegung zur Strangschale (6) erstarrt,
daß die im oberen Ersterstarrungsbereich (17) erstarrte Strangschale (6) sich während der Gegenbewegung quer zur Strangabzugsrichtung (x) gesehen von den Kokillenwänden (5) löst und von der Metallschmelze (1) umspült wird. - Stranggießverfahren nach Anspruch 1,
dadurch gekennzeichnet,
daß die Strangabzugsrichtung (x) lotrecht verläuft. - Kokille mit Kokillenwänden(5), in die eine Metallschmelze (1) gießbar und aus der eine Strangschale (6) in einer Strangabzugsrichtung (x) abziehbar ist,dadurch gekennzeichnet,wobei die Kokille (4) einen in Strangabzugsrichtung (x) gesehen oberen und einen in Strangabzugsrichtung (x) gesehen unteren Ersterstarrungsbereich (17, 18) aufweist undwobei der untere Ersterstarrungsbereich (18) im wesentlichen parallel zur Strangabzugsrichtung (x) verläuft und
daß der obere Ersterstarrungsbereich (17) einen kleineren Kokillenquerschnitt aufweist als der untere Ersterstarrungsbereich (18). - Kokille nach Anspruch 3,
dadurch gekennzeichnet,
daß die Strangabzugsrichtung (x) lotrecht verläuft. - Kokille nach Anspruch 3 oder 4,
dadurch gekennzeichnet,
daß der obere Ersterstarrungsbereich (17) sich zumindest in einem Teilabschnitt entgegen der Strangabzugsrichtung (x) gesehen kontinuierlich verjüngt. - Kokille nach Anspruch 3, 4 oder 5,
dadurch gekennzeichnet,
daß zwischen dem oberen und dem unteren Ersterstarrungsbereich (17, 18) ein Absatz (20) angeordnet ist. - Kokille nach Anspruch 6,
dadurch gekennzeichnet,
daß der Absatz (20) von der Metallschmelze (1) aus gesehen konvex ausgebildet ist. - Kokille nach einem der Ansprüche 3 bis 7,
dadurch gekennzeichnet,
daß der obere Ersterstarrungsbereich (17) an seinem in Strangabzugsrichtung (x) gesehen oberen Ende angefast ist. - Kokille nach einem der Ansprüche 3 bis 8,
dadurch gekennzeichnet,
daß auf die Kokillenwände (5) ein Aufsatz (14) aus feuerfestem Material aufgesetzt ist. - Kokille nach Anspruch 9,
dadurch gekennzeichnet,
daß der Aufsatz (14) einen Aufsatzquerschnitt aufweist, der kleiner als der Kokillenquerschnitt des oberen Ersterstarrungsbereichs (17) ist. - Kokille nach Anspruch 9 oder 10,
dadurch gekennzeichnet,
daß der Aufsatz (14) an seinem in Strangabzugsrichtung (x) gesehen unteren Ende angefast ist. - Stranggießvorrichtung,dadurch gekennzeichnet,mit einer Strangabzugseinrichtung (7), mittels derer die Strangschale (6) in der Strangabzugsrichtung (x) aus einer Kokille (4) abziehbar ist, undmit einer Hubvorrichtung (8), mittels derer die Kokille (4) relativ zur Strangschale (6) abwechselnd in und entgegen der Strangabzugsrichtung (x) oszillierbar ist,
daß die Kokille (4) nach einem der Ansprüche 3 bis 11 ausgebildet ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19903927 | 1999-02-01 | ||
| DE1999103927 DE19903927A1 (de) | 1999-02-01 | 1999-02-01 | Stranggießverfahren, hiermit korrespondierende Kokille und hiermit korrespondierende Stranggießvorrichtung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1025928A1 true EP1025928A1 (de) | 2000-08-09 |
Family
ID=7896035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00100949A Withdrawn EP1025928A1 (de) | 1999-02-01 | 2000-01-19 | Stranggiessverfahren, hiermit korrespondierende Kokille und hiermit korrespondierende Stranggiessvorrichtung |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1025928A1 (de) |
| DE (1) | DE19903927A1 (de) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4214624A (en) * | 1978-10-26 | 1980-07-29 | Kaiser Aluminum & Chemical Corporation | Method of and mold for DC casting |
| DE4115364A1 (de) * | 1990-06-15 | 1991-12-19 | Schloemann Siemag Ag | Verfahren und anlage zum giessen von duennbrammen |
-
1999
- 1999-02-01 DE DE1999103927 patent/DE19903927A1/de not_active Withdrawn
-
2000
- 2000-01-19 EP EP00100949A patent/EP1025928A1/de not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4214624A (en) * | 1978-10-26 | 1980-07-29 | Kaiser Aluminum & Chemical Corporation | Method of and mold for DC casting |
| DE4115364A1 (de) * | 1990-06-15 | 1991-12-19 | Schloemann Siemag Ag | Verfahren und anlage zum giessen von duennbrammen |
Non-Patent Citations (1)
| Title |
|---|
| W.R.IRVING: "Continuous casting of steel", 1993, THE INSTITUTE OF METALS, LONDON, XP002138312 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19903927A1 (de) | 2000-08-03 |
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