CN1156980A - Method of continuously casting thin cast pieces - Google Patents
Method of continuously casting thin cast pieces Download PDFInfo
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- CN1156980A CN1156980A CN96190674A CN96190674A CN1156980A CN 1156980 A CN1156980 A CN 1156980A CN 96190674 A CN96190674 A CN 96190674A CN 96190674 A CN96190674 A CN 96190674A CN 1156980 A CN1156980 A CN 1156980A
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- casting
- depressing
- depress
- thin cast
- solidifying
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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
- B22D11/16—Controlling or regulating processes or operations
- B22D11/20—Controlling or regulating processes or operations for removing cast stock
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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
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
An object of the invention is to provide a method of continuously casting thin cast pieces. The method of unsolidified rolling continuous casting, by which unsolidified cast pieces are subjected to rolling in a roller apron zone to produce thin cast pieces, and in which thin cast pieces are cast in the following steps 1 and 2. 1 a steady casting speed is temporarily decreased to a speed, at which thin cast pieces after rolling become completely solidified in an unsolidified rolling zone, and 2 after a thickness of a thin cast piece having been subjected to rolling is restored to an original thickness of the cast piece before the start of rolling, a casting speed is again increased to the original steady casting speed to release a rolling force at the time of rolling.
Description
The present invention relates to the continuous casing of thin cast piece, particularly a kind of in not solidifying the continuous casting of depressing, discharge and do not solidify the power of depressing of depressing, the internal soundness defective can be prevented and the thin cast piece continuous casing of casting sheet thickness can be changed.
Representative thin plate manufacture method is after the temporary transient cooling of the casting sheet that obtains from continuous casting process, uses the rolling method of rolling process again.In this method, casting back by air cooling the casting sheet when hot rolling system, must heat again, so consumed energy is many.
In recent years, be conceived to reduce significantly energy consumption, develop the direct-connected operation of hot rolling, that is, the casting sheet that comes out is supplied with roll mill without cooling ground from continuous casting machine.Owing to be to adopt thin cast piece, in the direct-connected operation of hot rolling system, can dispense the roughing operation, so current problem is further to develop the continuous casting technology of thin cast piece.
Adopt the direct-connected operation of hot rolling of this thin cast piece, owing to can dispense operation such as roughing, so, can more effectively realize energy-conservationization of whole system ironworker preface, the rationalization of operation.
Therefore, in the prior art, the so-called method of depressing of not solidifying has been proposed recently, that is, when making thin cast piece, the thickness of attenuate mold itself not, cast but mold thickness made with identical before thickness, under the not solidified state of casting sheet central part, depress this not solidified casting sheet, make thin cast piece thus.
But now, wish to realize that following continuous casting operates to adapt to different steel grades, output and the back coiled material thickness of slab etc. of operation, promptly, in casting, also can control the variation of casting sheet thickness, not only depress and do not solidify the casting sheet in the casting, and depress power not solidifying to discharge when depressing, making the casting sheet that is depressed be returned to original thickness or other thickness, the operation that casts continuously.But, in this case, become from a kind of thickness in the zone of another kind of thickness at the casting sheet, exist non-permanent portion inevitably.
Usually, in not solidifying the method for depressing because original mold thickness is little, the submergence nozzle with compare the attenuate refractory body thickness of having to before, so, because of the refractory body melting loss easily causes losing of nozzle.Therefore, the nozzle lost of life can only be accomplished 3 continuous castings, and can be accomplished 7～8 continuous castings before.Therefore, because continuous casting is limited, be an important problem from improving the viewpoint of yield rate, how reducing above-mentioned non-permanent portion.
And, in casting, discharge when depressing power, in the casting sheet, produce defective, depress that power discharges and the internal flaw portion that produces all becomes non-permanent portion by this.For this reason, especially need a kind ofly can improve casting method yield rate, that when the power of depressing discharges, also can prevent to cast the sheet internal flaw.
Therefore, when the power of depressing discharges, not only want to shorten the length of non-permanent portion, and will guarantee quality, improve yield rate simultaneously.
But, in the prior art, about the length that how to shorten this non-permanent portion and prevent from not solidify and discharge the internal flaw that produces because of depressing power when depressing, all still do not have any record.
The object of the present invention is to provide a kind of thin cast piece continuous casing, this method is that not solidifying of thin cast piece depressed continuous casing, can prevent to cast the internal flaw of sheet, and release is depressed power and changed casting sheet thickness in casting.
Another object of the present invention is to provide a kind of thin cast piece continuous casing, this method is that not solidifying of thin cast piece depressed continuous casing, can prevent to cast the sheet internal flaw, and can reduce the length of non-permanent portion as much as possible, release is depressed power and is changed casting sheet thickness in casting.
But discharge when depressing power in casting, only controlling depressing position is impossible reduce non-permanent minister's degree and guarantee quality.For example, if discharge the power of depressing under certain casting speed, what then do not solidify fully does not solidify the power of depressing that the casting sheet no longer is subjected to roll, within it portion under the molten steel hydrostatic pressure of solidification layer, the casting sheet does not bulge once more and produces the bulging phenomenon.This center segregation of causing casting sheet inside of bulging worsens or underbead crack etc., makes the deterioration of non-permanent portion.
Here, the operation that discharges the power of depressing of depress roller is called releasing operation.The starting point of releasing operation is set at the time point of variation point by last depress roller of casting sheet, and then discharges and depress power, make the casting sheet be returned to desired thickness.About this point, the present inventor has following opinion.
Depress earlier the not casting sheet of solidification layer is arranged in casting, for example make casting sheet thickness when the direction that increases changes, solidify front end (casting sheet solidify fully position) if always in not solidifying the zone of depressing, then under same cooling condition, also can not produce problem such as bulge.
When the change of casting sheet thickness,
1. when the casting sheet becomes desired value thickness, for example temporarily be reduced to below the casting speed that this thin cast piece solidifies in not solidifying the zone fully from permanent casting speed, under the cooling condition at this moment, to solidify front end and take the upstream side of depressing regional ultimate position to, and discharge the power of depressing of not solidifying when depressing during this period.
2. in the thickness recovery that makes this thin cast piece behind desired value thickness, with the permanent casting speed of casting speed speedup to desired value thickness.
By adopting above-mentioned method, defective is not seen in casting sheet inside, and can change casting sheet thickness, has made the present invention thus.
Therefore, in a broad sense, thin cast piece continuous casing of the present invention, be to depress the casting sheet in the casting of solidification layer not and make not solidifying of thin cast piece and depress continuous casing depressing the zone, it is characterized in that, for example, take the upstream side of depressing regional ultimate position to solidifying front end by the control casting speed, and during this period discharging the power of depressing of not solidifying when depressing, make at this moment casting sheet thickness recovery to desired value thickness.
On the other hand, thin cast piece continuous casing of the present invention, be to depress the casting sheet in the casting of solidification layer not and make not solidifying of thin cast piece and depress continuous casing depressing the zone, it is characterized in that, the thin cast piece that casting speed is changed to become desired value thickness do not solidify depress more than the casting speed of solidifying fully in the zone or below, like this, to solidify front end and take the upstream side of depressing regional end position to, simultaneously, in the change of casting speed way or after changing, discharge and depress power, casting sheet thickness thickness recovery at that time is behind desired value thickness, casting speed is returned to predetermined casting speed, for example permanent casting speed at that time.
Among the better embodiment of the present invention, the variation point that is preferably in the casting sheet when depressing regional terminal point by not solidifying or before begins to change casting speed.
Fig. 1 is the lateral longitudinal sectional drawing that the continuous casting machine structure of the inventive method is implemented in expression.
Fig. 2 is when illustrating with the inventive method change casting sheet thickness, casting sheet thickness and the example of casting the sheet velocity variations.Fig. 3 is the key diagram same with Fig. 2, the casting sheet thickness alter operation in the expression reference examples.
Fig. 4 is expression discharges transitional casting plate shape with the power of depressing method for releasing of the present invention, in the power of depressing a length direction side view.
Fig. 5 is the length direction side view that the power of depressing in the expression reference examples discharges transitional casting plate shape.
Fig. 6 is the length direction side view that the power of depressing in the expression reference examples discharges transitional casting sheet internal soundness.Fig. 7 is expression embodiment result's a chart.
Fig. 1 is the key diagram of realizing continuous casting machine (the following casting machine that the only is called) essential structure of the inventive method.
Among the figure, casting machine has mold 1, nip roll means 2 and pinch roll apparatus 3. The pattern of casting machine can be the arbitrarily pattern such as common flexure type or VB type. The part of nip roll means 2 by drive roller sets 4 ' and roll stacks 4 consist of. In nip roll means 2, be provided with not solidify and depress zone 7, this does not solidify depresses zone 7 and is used for depressing and does not solidify slab 11 and make thin cast piece 12, consists of by some sections 6 that depress cylinder body 5 at roll 4 and/or driven roller 4 ' have.
Not solidifying in the nip roll means 2 depressed zone 7, as shown in the figure, consists of by 5 sections altogether, is positioned at apart from meniscus 10 about 6m places of the molten steel 9 of mold 1. Pinch roll apparatus 3 is made of the pinch roll set 8 that is located at nip roll means 2 downstream sides usually.
The thickness of mold 1 is about 90～150mm, and width is about 1000～1800mm. The target thickness of depressing that do not solidify of slab is about 30～70mm. Therefore, do not solidify the pattern of depressing in the above-mentioned casting machine, preferably be about 5～35mm at the drafts of each section.
Permanent casting speed is preferably in 3.0～5.0m/min. In order to ensure such casting speed, regulate in advance cooling condition. Because casting speed is different because of slab thickness, in the following description, sometimes only is called predetermined casting speed.
But because scheduling of production, the relation of invar kind structure and casting speed must discharge the power of depressing sometimes in casting, makes slab thickness for example be returned to the original thickness of 100mm and continue casting from 50mm.
In this case, only do not discharge when depressing power if do not reduce casting speed, although the part of the complete crimping of solidified shell by depressing, release can not produce the bulging phenomenon yet even roll is depressed power, but, in the part of depressing the position and not solidifying fully, the release along with roll is depressed power can produce the bulging phenomenon.
That is to say, from the position that begins to depress to the part of depressing closing position, if discharge immediately the power of depressing, then move to the upstream side of depressing regional terminal point owing to solidify front end, because bulging of inside produces the bulging phenomenon, cause internal fissure and center segregation etc., the possibility that internal soundness is worsened increases.
Therefore, the release of depressing power is not that variation point in slab is by carrying out immediately after depressing the zone, but the thin cast piece that casting speed temporarily is reduced to after depressing carries out after depressing the speed of solidifying fully in the zone not solidifying, carry out in the time of perhaps with the reduction casting speed, like this, can avoid depressing power and discharge excessively interim bulging phenomenon, slab thickness can be returned to original thickness gradually.
Depress the power method for releasing with this, in slab is made, can avoid the internal soundness of thickness in the change transitional period to worsen, can improve yield rate ground and cast continuously.
Specify method of the present invention below with reference to Fig. 2. Fig. 2 is that expression uses the inventive method when change slab thickness, the example that slab thickness and casting speed change.
In the present embodiment, do not solidify with standing state and to depress, slab thickness is depressed into 50mm from 100mm, it is thick again it to be returned back to 100mm. The change of casting speed discharges with the power of depressing to be carried out simultaneously, that is, undertaken by the moment of depressing regional terminal point at the variation point of slab.
Earlier begin casting, depress in the operation not solidifying, be not depressed into 50mm casting sheet thickness by solidifying to depress with casting sheet thickness 100mm, permanent casting speed 4.0m/min.Then, because of reasons such as scheduling of production, make casting sheet thickness be returned to 100mm from 50mm.At this moment the change of casting speed is that the variation point at the casting sheet has passed through not solidify when depressing regional terminal point, immediately casting speed is reduced to 2.0m/min continuously, and the power of depressing simultaneously also discharges continuously.At this moment desired value casting speed is below the thin cast piece of desired value thickness (being 100mm in the present embodiment) casting speed of solidifying fully in depressing the zone.Therefore, casting speed at this moment is different because of desired value casting sheet thickness.In other words,, be present in and do not solidify the upstream side of depressing regional terminal point, then Ci Shi casting speed and depress the rate of release of power there is no particular restriction as long as this solidifies front end though solidify front end along with the reduction of casting speed and depress the release of power and change.
Though the degree of deceleration of the casting speed of this moment does not have special restriction, is preferably under the casting machine ability admissible condition, accelerates the rate of deceleration as much as possible, can reduce time-dependent generation like this.Length a represents the required time of slowing down among the figure.
After being decelerated to predetermined casting speed, continue casting with this casting speed.Continue to discharge during this period and depress power, realized the power of the depressing release value of desired value after, promptly guaranteed desired value casting sheet thickness after, begin to make casting speed to get back to permanent speed again.Length b by this represents to return the time of depressing regional terminal point from depressing the front end that solidifies that regional terminal point moves to upstream side.
That is to say, because of the deceleration of casting speed has moved on to the front end that solidifies of upstream side, along with the increase of casting sheet thickness again gradually toward dirty sidesway, behind the elapsed time b, solidify front end and turn back to and depress regional terminal point.Afterwards, by regulating cooling condition, solidify front end and remain on this position and increase casting speed while make.Perhaps, make after also can elapsed time b and solidify front end and still be positioned at the upstream side of depressing regional terminal point, make and solidify front end and return and depress regional terminal point by increasing casting speed.
Length a+b among Fig. 2 is corresponding to the length of non-permanent portion, it shortened as much as possible can improve yield rate effectively.With the concrete way of its shortening is to dwindle length a (perhaps b) as much as possible.
That is, in the another embodiment of the present invention, be the casting sheet variation point by before depressing regional terminal point, begin to change casting speed.This embodiment is described as follows.
At first, variation point with the casting sheet is a benchmark by the moment of depressing regional terminal point, set the change casting speed the moment, be the thickness change zero hour, ask the desired value casting speed of the change of this moment, promptly cast sheet (the casting sheet thickness in the present embodiment example is 100mm) and depressing the casting speed of final position when solidifying fully, try to achieve and be 2.0m/min.
Then, according to the arrangement of producing, be benchmark to depress regional ultimate position, the permanent casting sheet thickness of decision is the required time of 100mm earlier.
Then, obtain and make casting speed be reduced to the required time of 2.0m/min from 4.0m/min.
For example, establishing the rate of deceleration that casting speed reduces is 2.0m/min
2, in these cases, the casting speed in 1 minute is 2.0m/min, then needs 1 minute at least.In addition, do not depress place, regional ultimate position apart from solidifying of in-mold molten steel meniscus 6m position, becoming permanent teeming speed degree needs 3 minutes.Therefore, the change of casting sheet thickness pointed out when depressing regional terminal point or from this position 4 minutes with interior position, upper reaches, begin to reduce casting speed and get final product.
Like this, in the present invention, when the change of casting sheet, earlier being reduced to thin cast piece from permanent casting speed depresses below the casting speed of solidifying fully in the zone not solidifying, if target casting sheet thickness is 100mm, is 6m from the in-mold molten steel meniscus to not solidifying the distance of depressing regional terminal point, and then casting speed at that time is the casting speed that shell thickness in this position becomes 50mm.The scope of the casting speed that this formation is solidified fully depends on mold thickness and does not solidify and depresses zone length etc., generally is about 1.0～2.0m/min.
In addition, the intensity of variation rate of deceleration when changing casting speed or the scope of speedup rate are preferably in 1.0～4.0m/min.
Owing to be continuous casting, when casting speed is reduced, do not solidify the casting speed of depressing in the zone and reduce simultaneously yet, do not solidify the casting sheet and under the state that shell thickness increases, accept not solidify to depress.Because the power of depressing does not at this moment apply rolling ability, so, if shell thickness increases, to depress and do not interrupt, casting sheet thickness also is increased to 2 times of shell thickness.
In above-mentioned example, be that the casting sheet of 100mm thickness is not depressed with solidifying that to be pressed into 50mm thick, it is thick to make it turn back to 100mm again.But, also carry out same operation if will make it turn back to 70mm or 80mm is thick.Just in this case, position sensor need be set on depress roller, control casting speed and depressing position turn back to desired value thickness so that will cast sheet thickness.
Below, embodiments of the invention and action effect thereof are described.
Embodiment
With flexure type casting machine shown in Figure 1, with the middle carbon element aluminum killed steel of composition shown in the permanent casting speed 5.0m/min casting table 1.Mold is thick to be 100mm, and wide is 1500mm, the casting sheet is not solidified and depresses operation, with its be depressed into thick for 50mm, widely be the desired value of 1500mm, and it is thick to make it return back to 100mm on the way.When casting sheet thickness was 100mm, the complete solidified cast speed before depressing regional terminal point was 1.3m/min.
In the present embodiment, in standing state, depressing has a not casting sheet of solidification layer in the casting machine in casting, do not depress with solidifying that it is depressed into 50mm is thick, depressing in the 1st section to the 5th section the 3m length that the zone is located at nip roll means in the casting machine, the terminal point of depressing the zone is at distance in-mold molten steel meniscus 4m place.The pattern of depressing is every section and depresses for the equalization of 10mm.
Table 1
(Wt％)
| ??C | ?????Si | ???Mn | ????P | ????S | ????Al | ???Fe |
| ?0.12 | ????0.045 | ??0.80 | ??0.015 | ??0.008 | ???0.045 | ???bal. |
In the present embodiment, adopt the casting machine of 2 bursts of roll shapes,, depress the answer operation that method for releasing is cast sheet thickness with the present invention shown in Figure 2 the 1st burst of roller side.In the present embodiment, because the casting speed of solidifying fully before depressing terminal point is 1.3m/min, so, when casting speed is reduced to 1.3m/min, discharge and depress power, wait to cast the sheet thickness recovery and behind 100mm, return permanent casting speed 5.0m/min.In this alter operation, solidify front end and always depressing the upstream side of regional terminal point.
The 2nd burst of roller side, example is to keep under the state of permanent casting speed in contrast, discharges the answer operation of the power of depressing after variation point is by the nip territory immediately.Fig. 3 is the casting speed variation of this reference examples of expression and casts the figure of sheet varied in thickness with respect to the time.From this figure, as seen, depressing the zone casting sheet thickness of the finish time, be that the release of depress roller is carried out continuously.
Fig. 4 and Fig. 5 represent non-permanent shape of the casting sheet that the alter operation by the present invention and reference examples obtains respectively.Among the figure, the direction of arrow is that the extraction direction of casting sheet is a casting direction.
The 1st burst of roller side adopting the inventive method as shown in Figure 4, can be altered to 100mm from 50mm gradually with transitional casting sheet thickness.
On the other hand, in the 2nd burst of roller side of reference examples, transitional casting sheet as shown in Figure 5, is rendered as the cydariform of expansion because of bulging.
Check the fractography of casting sheet, consequently, in the 1st burst of roller side that adopts the inventive method, even at the casting sheet gradually in transitional period of thickening, its internal soundness is also no abnormal, also can be rolled when back operation rolling, and the coiling characteristic is good.On the other hand, implement the 2nd burst of roller side that the power of depressing discharges immediately, as shown in Figure 6, produce underbead crack and 2 crackles, in addition, also exist the negative segregation or the normal segregation of severe, when rolling, also form internal flaw in the cross section of cydariform casting sheet.
From as can be known above-mentioned, when discharging with the method for the present invention power of depressing when depressing of not solidifying, casting sheet internal soundness does not worsen, and variable thickness in casting can increase substantially yield rate.
Embodiment 2
Estimate the influence of steel grade in the present embodiment, repeat embodiment 1, with the low carbon element aluminum killed steel shown in the permanent casting speed 5.0m/min casting table 2.In the present embodiment, making the thick casting sheet of 100mm is 1.3m/min depressing the casting speed of solidifying fully before the zone end of a period point.
Table 2
(wt％)
| ??C | ????Si | ????Mn | ?????P | ?????S | ?????Al | ????Fe |
| ?0.05 | ???0.045 | ???0.85 | ???0.015 | ???0.008 | ????0.045 | ????bal. |
The result of present embodiment is as follows.
In the present embodiment, the variation of casting sheet thickness is also successfully carried out, and does not also have underbead crack in non-permanent portion, no center segregation, and quality is good.
In reference examples, when discharging from the power of depressing of 50mm when 100mm changes for non-permanent, as shown in Figure 5, present cydariform, though do not produce underbead crack,, center segregation and porosity worsen.
Fig. 7 represents that the internal soundness of present embodiment and reference examples compares, and the internal soundness coding of the longitudinal axis is shown step with following master meter.Internal soundness code 0: every 10cm
2The pore area rate 0% that horizontal section is long-pending
1：???????"????????????"??????????0～10％
2：???????"????????????"??????????10～30％
3：???????"????????????"??????????30～50％
4：???????"????????????"??????????50～70％
5: " " is more than 70%
Like this, with the middle carbon element steel comparison of embodiment, lack though internal soundness worsens, the result that yield rate is low does not change.
Embodiment 3
Estimate the influence of casting speed in the present embodiment, repeat embodiment 1, with middle carbon element aluminum killed steel shown in the permanent casting speed 5.0m/min casting table 1.
But, in the present embodiment, be that the casting sheet that 50mm is thick is returned to the thick target thickness of 100mm, at first the casting speed of slowing down is being done various changes, casting speed be decided to be 1.3,2.0,3.0m/min.In the present embodiment, the casting speed that the casting sheet before depressing the zone end of a period solidifies fully is 1.3m/min.
In the present embodiment, because casting speed is changed to 1.3m/min, casting sheet thickness changes from 100mm → 50mm → 100mm successively.Casting sheet internal soundness is good, and underbead crack and center segregation do not have deterioration.
On the other hand, in reference examples, because casting speed only is reduced to 2.0 and 3.0m/min, depressing the zone at the end, shell thickness is respectively 40mm, 33mm, depress regional ultimate position also remaining solidification layer not, when the power of depressing discharged, as shown in Figure 5, non-permanent portion became and is cydariform.Its internal soundness is also bad, and the casting speed when discharging is 2.0, under the situation of 3.0m/min, and underbead crack produces and center segregation worsens, and porosity increases, and yield rate is reduced.
Adopt method of the present invention, in the continuous casting process, also can change casting sheet thickness continuously, at that time, can prevent the reduction of surface texture and internal soundness, improve yield rate, can make the casting sheet of various sizes expeditiously.
Claims (7)
1. the continuous casing of thin cast piece, be by having casting sheet in the casting of solidification layer not and depress and make not solidifying of thin cast piece and depress continuous casing depressing the zone, it is characterized in that, take the upstream side of depressing regional ultimate position to solidifying front end, discharge the power of depressing of not solidifying when depressing simultaneously during this period, the casting sheet thickness recovery that makes this moment is to target casting sheet thickness.
2. the continuous casing of thin cast piece, be by having casting sheet in the casting of solidification layer not and depress and make not solidifying of thin cast piece and depress continuous casing depressing the zone, it is characterized in that, with casting speed temporarily change to after changing as the thin cast piece of target thickness do not solidify depress more than the casting speed of solidifying fully in the zone or below, make the power of the depressing change of not solidifying when depressing, casting sheet thickness recovery at this moment makes casting speed be returned to predetermined casting speed behind target thickness again.
3. thin cast piece continuous casing as claimed in claim 2 is characterized in that, the casting sheet variation point by do not solidify depress regional terminal point in, begin to change casting speed.
4. thin cast piece continuous casing as claimed in claim 2 is characterized in that, the casting sheet variation point by do not solidify depress regional terminal point before, begin to change casting speed.
5. the continuous casing of thin cast piece, be by having casting sheet in the casting of solidification layer not and depress and make not solidifying of thin cast piece and depress continuous casing depressing the zone, it is characterized in that, casting speed temporarily is reduced to after changing as the thin cast piece of target thickness depresses below the casting speed of solidifying fully in the zone not solidifying, the power of depressing of not solidifying when depressing is discharged, casting sheet thickness recovery at this moment increases to casting speed predetermined casting speed again behind target thickness.
6. thin cast piece continuous casing as claimed in claim 5 is characterized in that, the casting sheet variation point by do not solidify depress regional terminal point in, begin to reduce casting speed.
7. thin cast piece continuous casing as claimed in claim 5 is characterized in that, the casting sheet variation point by do not solidify depress regional terminal point before, begin to reduce casting speed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP156394/95 | 1995-06-22 | ||
| JP15639495 | 1995-06-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1156980A true CN1156980A (en) | 1997-08-13 |
| CN1048203C CN1048203C (en) | 2000-01-12 |
Family
ID=15626785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96190674A Expired - Lifetime CN1048203C (en) | 1995-06-22 | 1996-06-20 | Method of continuously casting thin cast pieces |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0776716A4 (en) |
| KR (1) | KR100227594B1 (en) |
| CN (1) | CN1048203C (en) |
| WO (1) | WO1997000748A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1310722C (en) * | 2002-12-23 | 2007-04-18 | 株式会社Posco | A method of startup procedure of strip in the twin roll strip casting process |
| CN103192043A (en) * | 2013-04-07 | 2013-07-10 | 昆明理工大学 | Method for restraining cast ingot central crack from being generated |
| CN106232263A (en) * | 2014-05-14 | 2016-12-14 | 新日铁住金株式会社 | The continuous casing of strand |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19933635A1 (en) * | 1999-07-17 | 2001-01-18 | Sms Demag Ag | Method and device for changing the format thickness of the cast strand of a continuous caster in a continuous casting operation |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5422777B2 (en) * | 1973-09-17 | 1979-08-09 | ||
| JPS53102224A (en) * | 1977-02-18 | 1978-09-06 | Ishikawajima Harima Heavy Ind | Drawing off method and apparatus for continuous casted segment |
| JPS5813454A (en) * | 1981-07-13 | 1983-01-25 | Nippon Steel Corp | Method and device for controlling thickness of ingot in continuous casting |
| JPH01271047A (en) * | 1988-04-20 | 1989-10-30 | Sumitomo Metal Ind Ltd | Light rolling reduction method in continuous casting machine |
| US5110533A (en) * | 1990-11-07 | 1992-05-05 | Milad Limited Partnership | Method for the use of gas assistance in the molding of plastic articles to enhance surface quality |
| AT401744B (en) * | 1993-10-14 | 1996-11-25 | Voest Alpine Ind Anlagen | METHOD AND SYSTEM FOR CONTINUOUS CASTING |
-
1996
- 1996-06-20 CN CN96190674A patent/CN1048203C/en not_active Expired - Lifetime
- 1996-06-20 KR KR1019970700984A patent/KR100227594B1/en not_active IP Right Cessation
- 1996-06-20 WO PCT/JP1996/001701 patent/WO1997000748A1/en not_active Application Discontinuation
- 1996-06-20 EP EP96918856A patent/EP0776716A4/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1310722C (en) * | 2002-12-23 | 2007-04-18 | 株式会社Posco | A method of startup procedure of strip in the twin roll strip casting process |
| CN103192043A (en) * | 2013-04-07 | 2013-07-10 | 昆明理工大学 | Method for restraining cast ingot central crack from being generated |
| CN103192043B (en) * | 2013-04-07 | 2016-01-20 | 昆明理工大学 | A kind of method suppressing ingot casting centre burst to produce |
| CN106232263A (en) * | 2014-05-14 | 2016-12-14 | 新日铁住金株式会社 | The continuous casing of strand |
| CN106232263B (en) * | 2014-05-14 | 2019-01-18 | 新日铁住金株式会社 | The continuous casing of slab |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1048203C (en) | 2000-01-12 |
| KR970704535A (en) | 1997-09-06 |
| EP0776716A1 (en) | 1997-06-04 |
| KR100227594B1 (en) | 1999-11-01 |
| WO1997000748A1 (en) | 1997-01-09 |
| EP0776716A4 (en) | 1999-06-30 |
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