CN1288787A - Continuous casting method using electromayhetic cast mold with unequal width gaps - Google Patents
Continuous casting method using electromayhetic cast mold with unequal width gaps Download PDFInfo
- Publication number
- CN1288787A CN1288787A CN 99120825 CN99120825A CN1288787A CN 1288787 A CN1288787 A CN 1288787A CN 99120825 CN99120825 CN 99120825 CN 99120825 A CN99120825 A CN 99120825A CN 1288787 A CN1288787 A CN 1288787A
- Authority
- CN
- China
- Prior art keywords
- mold
- casting
- wide
- electromayhetic
- unequal width
- 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
Links
Images
Abstract
The present invention relates to a continuous casting method using electromagnetic mold with unequal width gaps, its mold is characterized by that at a distance 10-30 mm from upper end face of the mold several gap structures of electromagnetic mold with unequal width gaps are cut, its lower half-portion is equal-width gap, and its upper half-portion possesses unequal width gaps form 50 to 80 mm; its casting method is characterized by that the outer side of mold is equipped with a high-frequency coil whose upper and face and level are being in same horizontal surface, the outlet correspondent to straight running channel is equipped with electromagnetic iron, and the outlet of mold is equipped with low-frequency stirring coil, and the height error of liquid level and upper end face of the high-frequency coil can be retained in plus or minus 10 mm.
Description
The present invention relates to the casting mold and the casting method of metal electromagnetic continuous-casting, belong to field of metal casting technology.
The electromagnetic continuous-casting of liquid metals is nearly ten years a kind of advanced casting methods that grow up, because it can greatly improve the quality of continuous casting billet, so be considered to the new method of 21 century metal forming.
Continuous casting electromagnetic is the solenoid that is connected with alternating current in electromagnetism casting mold arranged outside, alternating current in the solenoid forms alternating magnetic field in the electromagnetism casting mold, and in molten metal, induce induced-current, have faradic molten metal is subjected to pointing to from the electromagnetism mould wall electromagnetic force at center in alternating magnetic field effect, make it in casting process, keep leaving the type wall, that is: metal bath surface is not out of shape with electromagnetism casting mold up-down vibration, elimination improves the casting method of continuous-cast blank surface quality because of the many disadvantages that the casting mold vibration causes.According to this principle, people adopt the solenoid method that is connected with industrial-frequency alternating current is set outside the continuous casting casting mold, have obtained certain effect; But industrial-frequency alternating current easily makes can produce in the liquid metals and stirs stream, forms casting flaw.Therefore, casting mold structure becomes the vital problem of continuous casting electromagnetic that realizes with the mode that applies magnetic field.
SUMITOMO CHEMICAL metal company in 1994 have proposed to apply the electromagnetic continuous casting process of composite electromagnetic field in the JP06277803 patent.For the intermediate frequency magnetic field energy penetrating metal casting mold that makes 3.4kHz acts on liquid metals, proposed to offer equably on the mould wall electromagnetism casting mold in wide slit, and at the arranged outside magnetite of intermediate frequency coil, so that alleviating liquid level flows, keep the stable technical scheme of liquid level, become typical case of the prior art.This technology has been improved slab surface quality.But, still exist following deficiency: 1. because prior art is used wide slit electromagnetism casting mold, so the magnetic field that enters in the casting mold is less, the waste electric energy, 2. owing to adopt spiral solenoid can make the Distribution of Magnetic Field in the electromagnetism casting mold inhomogeneous, and cause the metal bath surface unstability, influence cc billet surface quality, 3. the casting blank inner organization equiaxed zone ratio is low, and casting flaws such as loosening and is mingled with are arranged.
Purpose of the present invention is exactly that will to overcome (1) electromagnetism casting mold internal magnetic field intensity that prior art exists low, Distribution of Magnetic Field is inhomogeneous, (2) deficiency of casting flaw such as few, shrinkage porosite of strand central part equiaxed zone ratio, and on the basis that guarantees cc billet surface quality, proposing a kind ofly can increase electromagnetism casting mold internal magnetic field intensity, make Distribution of Magnetic Field even, increase equiaxed zone ratio, obtain a kind of technical solution of using the continuous casing of electromayhetic cast mold with unequal width gaps of high-quality continuous casting billet.
The not enough main cause that above-mentioned existing continuous casting electromagnetic exists is, because the electromagnetism casting mold designs due to unreasonable and the grain refinement improper measures.Make a concrete analysis of as follows:
In the electromagnetic continuous-casting process, the electromagnetic field that solenoid produces must see through the electromagnetism casting mold and could work by the liquid towards metal.But in general, electromagnetic field can cause the strength retrogression during by conductor, can be represented by the formula
H=H
0Exp (z/ δ) exp (j (ω t-z/ δ)) (1) H
0Be the amplitude of conductive surface magnetic field intensity, H is the magnetic field intensity of casting mold inside, and j is a current density, and z is the distance in from the conductive surface to the conductor, and δ is the length of penetration in magnetic field.So the electromagnetic field of high frequency can not penetrate copper electromagnetism casting mold and enter in the casting mold, can only work to liquid metals by the slit of type wall.Therefore, the slit of electromagnetism casting mold is wide more, and casting mold internal magnetic field intensity is big more, and the efficient of power supply is high more.
Because the inhomogeneities of spiral high frequency coil Distribution of Magnetic Field, if offer wide slit on the type wall, then form uneven Distribution of Magnetic Field along casting direction in the electromagnetism casting mold, this uneven Distribution of Magnetic Field will produce uneven electromagnetic force, cause that easily molten metal flows, and forms casting flaw.
When pouring into a mould with sprue, flowing out the mobile of sprue liquid metals is the main cause that forms the strand inner inclusion, if suppressed to flow out flowing of sprue liquid metals, can alleviate the amount of being involved in of impurity, improves the strand internal soundness; When liquid metals solidifies,, then form thick dendrite if thermograde is big in casting mold; If certain stage in the casting blank solidification process suitably increases liquid metals and flows, can reduce the thermograde in the strand metal reservoir, and smash partial tree dendrite, help forming equiax crystal, alleviated loose.
Basic design of the present invention is on electromagnetism casting mold type wall, offers along casting direction or the not wide slit of type wall thickness direction, increases the magnetic field intensity in the casting mold, and makes Distribution of Magnetic Field even; The first half at the electromagnetism casting mold applies high frequency magnetic field, liquid metals is slowly being solidified under the cooling condition, and keep liquid level stabilizing, can improve slab surface quality; If apply dc electromagnetic field in the sprue exit, then the stationary magnetic field electromagnetic force opposite with flow direction with liquid metal stream effect generation can suppress to flow out flowing of sprue liquid metals; Apply the low-frequency ac electromagnetic field in the casting blank solidification process, then bring out electromotive force in the strand metal reservoir, produce induced-current, electric current and magnetic field effect form electromagnetic stirring force, can improve the strand internal soundness; In the casting process, earlier base is inserted in the electromagnetism casting mold, connect the power supply of high frequency coil, DC electromagnet and low frequency stirring coil more respectively, then the liquid metals that melts in the induction furnace is poured in the electromagnetism casting mold by sprue, remain liquid level and high frequency coil upper end at same horizontal plane, at last, the strand after solidifying moves downward continuously with base under the effect of throwing system.
A kind of continuous casing proposed by the invention with electromayhetic cast mold with unequal width gaps, its casting mold comprises that mainly the internal water cold-peace offers a plurality of wide slit [7] structures that are parallel to each other at type wall upper edge casting direction, it is characterized in that: on the type wall of this electromagnetism casting mold, offering a plurality of length apart from upper surface 10-30mm place along casting direction is 150-300mm, its Lower Half is wide wide slit [7] structure division of 0.3-0.6mm that is, its first half is not wide slit [11] structure division along type wall thickness direction or casting direction, constitute the gap structure of electromayhetic cast mold with unequal width gaps [4] jointly by not wide gap structure part and wide gap structure part, wherein, the length of not wide slit [11] structure division is 50-80mm; Its structure of not wide slit [11] is on the face of wide slit [7] first half of the inboard wide 0.3-0.6mm of being of type wall, be the 0-1.0mm place apart from its type wall inboard, offering its type wall outside gap width along the wall thickness direction is the not wide gap structure of 2.0-5.0mm, or with the first half in slit offer into its upper end head breadth be 1.0-2.0mm, lower end is 0.3-0.6mm, narrow down gradually along casting direction, and the not wide gap structure that the inside and outside gap width of type wall equates.
A kind of continuous casing with electromayhetic cast mold with unequal width gaps, its continuous casing is made of the electromagnetism casting mold in crack with seam, liquid metals [8], solenoid, running gate system, cooling system, throwing system, electric power system, it is characterized in that: the outside in electromayhetic cast mold with unequal width gaps [4] is provided with in liquid metals meniscus place that its upper surface and liquid level [10] are in same horizontal plane, frequency is that 10-100kHz, power are the high frequency coil [6] of 40-100kW; In high frequency coil [6] below,, be provided with the DC electromagnet that magnetic induction intensity is 1500-2000G [5] in place, corresponding sprue [9] exit position; Exit in electromayhetic cast mold with unequal width gaps [4], being provided with frequency is that 3-60Hz, electric current are the low frequency stirring coil [3] of 100-200A; In the casting process; earlier base [1] is inserted in the electromayhetic cast mold with unequal width gaps [4]; start cooling system; again the liquid metals [8] that melts in the induction furnace is poured in the electromagnetism casting mold by sprue [9]; and the upper end surface that will keep liquid level [10] and high frequency coil [6] is in same horizontal plane; its error should be within ± 10mm scope; then, connect high frequency coil [6] respectively; the power supply of DC electromagnet [5] and low frequency stirring coil [3], last; start the throwing system; make strand [2] after solidifying under the effect of throwing system, move downward continuously with base [1], at this moment; should make liquid level and high frequency coil upper surface be in the position of same horizontal plane all the time; the error range of its requirement remains unchanged, and when stopping to pour into a mould, cuts off the electricity supply; close cooling system, shut down.
The present invention is applicable to the continuous casting electromagnetic of round base, square billet and slab; General casting blank cross-section size hour, the gap width of casting mold, the length, slit in wide slit all should not taken off limit value apart from the distance of distance, high frequency coil upper surface and the electromagnetism casting mold upper end of casting mold upper surface and the power that puts on high frequency coil, when casting blank cross-section size is big, then answer the capping value; Frequency by the high frequency coil alternating current can be used from 10kHz to 100kHz, and when frequency was higher, surface quality was better, but power-efficient is low; Casting blank cross-section size hour, the current strength of the magnetic induction intensity of DC electromagnet and low frequency stirring coil is taken off limit value, the frequency capping value of low frequency stirring coil alternating current, otherwise the current strength capping value of the magnetic induction intensity of DC electromagnet and low frequency stirring coil, the frequency of low frequency stirring coil alternating current is taken off limit value; Should keep the range difference of liquid level and high frequency coil upper end in the casting process is ± 10mm that preferably the two is in same horizontal plane.
Compared with prior art the present invention has the following advantages: (1) uses not wide electromagnetism casting mold casting of the present invention, when high frequency coil applies same power supplies power, the magnetic induction intensity at casting mold inner metal liquid face place increases, can save electric power 17%, (2) liquid level place Distribution of Magnetic Field is even, and the surface roughness of strand reduces by 43%, and (3) are provided with DC electromagnet [5] at place, corresponding sprue [9] exit position, alleviated being mingled with that casting process produces, The amount of inclusions is from 1/100cm
2Be reduced to 0.2/100cm
2, the function composite by electromagnetic stirring of low frequency magnetic field makes the ratio of strand heart portion equiax crystal improve 26%, and high frequency magnetic field can also prevent that low frequency electromagnetic from stirring the liquid level disorder that causes, keeps liquid level stable.
Further specify details of the present invention below in conjunction with accompanying drawing.
Fig. 1 is the cross-sectional view of facing of the present invention designed not wide electromagnetism casting mold, high frequency coil and low frequency stirring coil and DC electromagnet entire arrangement.
The outside in electromayhetic cast mold with unequal width gaps [4] is highly located the high frequency coil [6] that is connected with high-frequency alternating current is set in liquid level [10], and the upper surface of high frequency coil and liquid level are on the same horizontal plane; Below high frequency coil, place, corresponding sprue [9] exit position is provided with DC electromagnet [5]; Below the outlet of electromagnetism casting mold, locate to be provided with low frequency stirring coil [3]; Liquid metals [8] is poured in the electromayhetic cast mold with unequal width gaps through sprue [9], and the strand after solidifying [2] moves downward continuously with base [1] under the effect of throwing system.Symbol [7] and symbol [11] are respectively the wide slit and the not wide slits of electromagnetism casting mold, add plug with refractory material in the use.Symbol A-A and symbol B-B are the section symbols of two different sections.
Fig. 2 is the plan structure schematic diagram of Fig. 1.
4 type walls of square electromayhetic cast mold with unequal width gaps [4], on each type wall, all offer 3 wide slits [7] that are parallel to each other, offer the long not wide slit [11] of 50-80mm that is apart from the inboard 0-1.0mm of type wall place along the wall thickness direction at the first half in wide slit along casting direction.Plug is added with refractory material in the slit, in case molten metal spills from the slit after sprue [9] is poured into casting mold; High frequency coil [6] is installed in the outside of electromayhetic cast mold with unequal width gaps [4], and symbol [10] is the liquid level of liquid metals.
Fig. 3 is the A-A section structure schematic diagram of Fig. 1.
Demonstrate 2 DC electromagnets [5] among the figure, be arranged on two corresponding lateral surfaces of square electromayhetic cast mold with unequal width gaps [4], symbol [2] is the strand that has solidified, and symbol [8] is not solidified liquid metals.
Fig. 4 is the B-B section structure schematic diagram of Fig. 1.
Demonstrate the low frequency stirring coil of being made up of 4 groups of absolute coils [3] among the figure, be arranged on the below of electromayhetic cast mold with unequal width gaps, lay respectively at 4 sides in strand [2] outside, symbol [8] is not solidified liquid metals.
Fig. 5 be the present invention propose face structural representation along wall thickness direction electromayhetic cast mold with unequal width gaps.
The positive TV structure of a sidewall of the square electromayhetic cast mold with unequal width gaps of forming by 4 type walls that shows among the figure, on each piece type wall of electromayhetic cast mold with unequal width gaps [4], evenly offer apart from 10-30mm place, casting mold upper surface along casting direction 3 its inboardly be wide slit [7], offer length at the first half of wide slit [7], apart from the inboard 0-1.0mm of type wall place and be 50-80mm along the not wide slit of type wall thickness direction [11].Symbol A-A is the section symbol.
Fig. 6 is the A-A section structure schematic diagram of Fig. 5.
4 sides along wall thickness direction electromayhetic cast mold with unequal width gaps [4] are made up of the type wall of 4 inner water-cooleds, on each face type wall, all have widely be 0-1.0mm place, outside the type wall, offer the wide 2.0-5.0mm of being along not wide slit [11] that type wall thickness direction is widened gradually for the wide slit [7] of 0.3-0.6mm with in that distance type wall is inboard.
Fig. 7 is the cross-sectional view of facing of Fig. 5.
The electromayhetic cast mold with unequal width gaps of forming by 4 type walls [4], offering the slit that is parallel to each other apart from its upper surface certain distance, it is wide slit [7] that the slit of two opposing sidewalls that are broken away demonstrates its Lower Half, its first half in wide slot sides apart from the madial wall certain distance, outwards sidewall direction is offered not wide slit [11] structure of widening gradually, this not wide slit equates with the width in wide slit at the width of type wall inboard, at the width in the type wall outside then greater than the width of side within it.Be in the sidewall in this figure front, be actually from casting mold inside and see sidewall, its each bar slit all be up and down with wide slit with wide structure.Dotted line among the figure represents to be in the outer side edges in 3 the not wide slits [11] on the sidewall of this figure front.
Fig. 8 be the present invention designed face structural representation along the casting direction electromayhetic cast mold with unequal width gaps.
The positive TV structure of a sidewall of the square electromayhetic cast mold with unequal width gaps of forming by 4 type walls that shows among the figure, on each piece type wall of electromayhetic cast mold with unequal width gaps [4], the 10-30mm place is along the casting direction slit that to offer 3 length be 150-300mm above casting mold, the upper end head breadth 1.0-2.0mm of this its first half of slit, lower end head breadth 0.3-0.6mm, length be 50-80mm along the not wide slit of casting direction [11], and wide slit [7] structure that the Lower Half inside and outside gap width that is the type wall equates is made of the not wide gap structure of this electromagnetism casting mold jointly the wide slit of the not wide slit of the first half and Lower Half.Symbol A-A is the section symbol.
Fig. 9 is the A-A section structure schematic diagram of Fig. 8.
4 sides along casting direction electromayhetic cast mold with unequal width gaps [4] are made up of the type wall of 4 inner water-cooleds, on each piece type wall, all have Lower Half be wide for the wide slit [7] of 0.3-0.6mm and the first half be its upper end head breadth be 1.0-2.0mm along the not wide slit of casting direction [11], form the not wide gap structure of this electromagnetism casting mold jointly by the wide slit of the not wide slit of the first half and Lower Half.
Figure 10 be under the high frequency coil effect magnetic field intensity in the not wide gap structure electromagnetism casting mold and distribution and with the comparison schematic diagram of prior art.
The outside in electromayhetic cast mold with unequal width gaps [4] is provided with high frequency coil [6] apart from 50mm place, its upper surface; Tested the Distribution of Magnetic Field in the electromagnetism casting mold, abscissa represents that unit is mm apart from the distance of its electromagnetism casting mold upper surface, and ordinate is represented the magnetic induction intensity at place, casting mold axle center, and unit is G; Symbol ◆ be the Distribution of Magnetic Field when adopting existing wide slit electromagnetism casting mold, symbol ▲ and symbol ● be respectively adopt that the present invention proposes along the wall thickness direction or along the casting direction electromayhetic cast mold with unequal width gaps time Distribution of Magnetic Field.Applying under the same power supplies power condition, comparing with existing wide slit electromagnetism casting mold, when using not wide electromagnetism casting mold of the present invention, the magnetic induction intensity of the casting mold first half increases, and is evenly distributed.
Be specific embodiments of the invention below:
Certain production of units cross dimensions is the little square billet of 100 * 100mm, and material is a Fine Steel Casting iron, requires casting billet surface roughness＜0.25, in the strand equiaxed zone ratio greater than 65%, The amount of inclusions is less than 1/100cm
2, as rolled wire.Adopt continuous casing of the present invention, its step is as follows:
The first step is prepared casting mold and coil
Its inside dimension of copper wall thickness direction electromayhetic cast mold with unequal width gaps [4] 100 * 100 * 400mm that adopts, external dimensions 146 * 146 * 400mm, the slit that to offer 20 length apart from 20mm place, casting mold upper surface be 250mm, the long 80mm in not wide slit [11] of the first half wherein, apart from the inboard 0.5mm of type wall place, the gap width of its type wall inboard is 0.4mm, and the gap width in its type wall outside is 5mm; High frequency coil [6] is 6 circles, inside dimension 150 * 150 * 80mm, and external dimensions 174 * 174 * 80mm, high frequency electric frequency 20kHz, applying power is 55kW, high frequency coil [6] upper surface is apart from electromagnetism casting mold upper surface 70mm; The magnetic induction intensity 2000G of DC electromagnet is installed in the 30mm place, below of high frequency coil; Low frequency stirring coil [3] frequency is 10Hz, and electric current 150A is installed in apart from electromagnetism casting mold [4] outlet 100mm place.Standby after the passed examination.
The blank fusing of second step
With electric furnace the carbon steel blank is melted to 1600 ℃, insulation, refining slagging-off, stand-by.
The continuous casting of the 3rd step
Earlier base [1] is inserted in the electromayhetic cast mold with unequal width gaps [4], start cooling system, after normal on inspection, again 1520 ℃ liquid metals [8] in the tundish is poured in the electromagnetism casting mold through sprue [9], and keep liquid level [10] and high frequency coil [6] upper end surface in same horizontal plane, its error should be added the BZW3 covering slag in casting mold within ± 10mm scope; Then, connect the power supply of high frequency coil [6], DC electromagnet [5] and low frequency stirring coil [3] respectively; At last; start the throwing system; strand after solidifying [2] moves downward with base [1] with the speed of 0.6m/min, at this moment under the effect of throwing system continuously; should make liquid level and high frequency coil upper surface be in the position of same horizontal plane all the time; the error range that requires remains unchanged, and when stopping to pour into a mould, cuts off the electricity supply; close cooling system, shut down.
The 4th step quality examination
With strand press that 1.5m length is cut off, after the cooling, detecting its surface roughness is 0.18mm, the The amount of inclusions of section is 0.2/100cm
2, equiaxed zone ratio is 73%, output power of power supply 55kW.
This result compared with prior art, surface roughness reduces by 42%, The amount of inclusions is from 1/100cm
2Be reduced to 0.2/100cm
2, equiaxed zone ratio increases by 26%, and power consumption reduces by 15.4%.
Certain production of units cross dimensions is the round base of φ 80mm, and material is a low-alloy steel, requires casting billet surface roughness＜0.25, and equiaxed zone ratio in the strand＞70%, The amount of inclusions are less than 1/100cm
2, as drawn and rolled tube.Adopt continuous casing of the present invention, its step is as follows:.
The first step is prepared casting mold and coil
The copper that adopts is along its inside dimension of casting direction electromayhetic cast mold with unequal width gaps [4] φ 80 * 400mm, external dimensions φ 120 * 400mm, at 15mm place, distance type wall upper surface, along the equidistant slit that to offer 12 length be 160mm of its wall, the long 60mm in not wide slit [11] of the first half wherein, the upper end slit width is 1.5mm, and the lower end slit width is 0.3mm; High frequency coil [6] is 4 circles, inside dimension φ 130 * 65mm, and external dimensions φ 154 * 65mm, high frequency electric frequency 80kHz, applying power is 49kW, its upper surface of high frequency coil [6] is apart from electromagnetism casting mold upper surface 50mm; The magnetic induction intensity 1500G of DC electromagnet is installed in the 30mm place, below of high frequency coil; Low frequency stirring coil [3] frequency is 50Hz, and electric current 120A is installed in apart from electromagnetism casting mold [4] outlet 100mm place.
Second step is identical with embodiment 1 with the 3rd step, omits narration at this.
The 4th step quality examination
With strand press that 1.5m length is cut off, after the cooling, detecting its table roughness is 0.17mm, the The amount of inclusions of section is 0.2/100cm
2, equiaxed zone ratio is 74%, output power of power supply 49kW.
This result compared with prior art, surface roughness reduces by 45%, The amount of inclusions is from 1/100cm
2Be reduced to 0.2/100cm
2, equiaxed zone ratio increases by 26%, and power consumption reduces by 18.3%.
Claims (3)
1, a kind of continuous casing with electromayhetic cast mold with unequal width gaps, its casting mold comprise that mainly the internal water cold-peace offers a plurality of wide slit [7] structures that are parallel to each other at type wall upper edge casting direction, it is characterized in that:
On the type wall of this electromagnetism casting mold, offering a plurality of length apart from upper surface 10-30mm place along casting direction is 150-300mm, its Lower Half is wide wide slit [7] structure division of 0.3-0.6mm that is, its first half is not wide slit [11] structure division along type wall thickness direction or casting direction, constitute the gap structure of electromayhetic cast mold with unequal width gaps [4] jointly by not wide gap structure part and wide gap structure part, wherein, the length of not wide slit [11] structure division is 50-80mm.
2, a kind of continuous casing according to claim 1 with electromayhetic cast mold with unequal width gaps, it is characterized in that: its structure of not wide slit [11] is on the face of wide slit [7] first half of the inboard wide 0.3-0.6mm of being of type wall, be the 0-1.0mm place apart from its type wall inboard, offering its type wall outside gap width along the wall thickness direction is the not wide gap structure of 2.0-5.0mm, or with the first half in slit offer into its upper end head breadth be 1.0-2.0mm, lower end is 0.3-0.6mm, narrow down gradually along casting direction, and the not wide gap structure that the inside and outside gap width of type wall equates.
3, a kind of continuous casing with electromayhetic cast mold with unequal width gaps, its continuous casing is made of the electromagnetism casting mold in crack with seam, liquid metals [8], solenoid, running gate system, cooling system, throwing system, electric power system, it is characterized in that:
A), in the outside of electromayhetic cast mold with unequal width gaps [4], be provided with in liquid metals meniscus place that its upper surface and liquid level [10] are in same horizontal plane, frequency is that 10-100kHz, power are the high frequency coil [6] of 40-100kW,
B), in high frequency coil [6] below, in place, corresponding sprue [9] exit position, be provided with the DC electromagnet that magnetic induction intensity is 1500-2000G [5],
C), in the exit of electromayhetic cast mold with unequal width gaps [4], being provided with and being connected with frequency is that 3-60Hz, electric current are the low frequency stirring coil [3] of 100-200A,
D); in the casting process; earlier base [1] is inserted in the electromayhetic cast mold with unequal width gaps [4]; start cooling system; again the liquid metals [8] that melts in the electric furnace is poured in the electromagnetism casting mold by sprue [9]; and the upper end surface that will keep liquid level [10] and high frequency coil [6] is in same horizontal plane; its error should be within ± 10mm scope; then, connect high frequency coil [6] respectively; the power supply of DC electromagnet [5] and low frequency stirring coil [3], last; start the throwing system; make strand [2] after solidifying under the effect of throwing system, move downward continuously with base [1], at this moment; should make liquid level and high frequency coil upper surface be in the position of same horizontal plane all the time; the error range of its requirement remains unchanged, and when stopping to pour into a mould, cuts off the electricity supply; close cooling system, shut down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991208250A CN1142043C (en) | 1999-09-22 | 1999-09-22 | Continuous casting method using electromayhetic cast mold with unequal width gaps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991208250A CN1142043C (en) | 1999-09-22 | 1999-09-22 | Continuous casting method using electromayhetic cast mold with unequal width gaps |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1288787A true CN1288787A (en) | 2001-03-28 |
| CN1142043C CN1142043C (en) | 2004-03-17 |
Family
ID=5281694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB991208250A Expired - Fee Related CN1142043C (en) | 1999-09-22 | 1999-09-22 | Continuous casting method using electromayhetic cast mold with unequal width gaps |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1142043C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102211161A (en) * | 2011-05-27 | 2011-10-12 | 青岛理工大学 | Method and device for improving quality of continuous casting large-caliber hollow metal tube blank |
-
1999
- 1999-09-22 CN CNB991208250A patent/CN1142043C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102211161A (en) * | 2011-05-27 | 2011-10-12 | 青岛理工大学 | Method and device for improving quality of continuous casting large-caliber hollow metal tube blank |
| CN102211161B (en) * | 2011-05-27 | 2012-10-03 | 青岛理工大学 | Method and device for improving quality of continuous casting large-caliber hollow metal tube blank |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1142043C (en) | 2004-03-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0401504B2 (en) | Apparatus and method for continuous casting | |
| CN1142045C (en) | Continuous metal casting method with applied composite electromagnetic field | |
| CN106623832A (en) | Preparation device and method of aluminum alloy ingot with ultra-large dimension | |
| CN101386060B (en) | Novel copper and copper alloy plate belt electromagnetism assistant casting method and device | |
| CN101402132A (en) | Electromagnetic auxiliary casting method and device for copper and copper alloy strip | |
| CN101259523B (en) | Electro-magnetic braking device for controlling molten metal flow in continuous cast crystallizer | |
| CN1148526A (en) | Method for making molten metal in two-roller continuous casting machine generate vibration, and apparatus thereof | |
| JP2008183597A (en) | Continuous casting method of steel, and method for manufacturing steel plate | |
| CN1142043C (en) | Continuous casting method using electromayhetic cast mold with unequal width gaps | |
| KR960006043B1 (en) | System for removing non-metallic inclusions in molten metal | |
| JP3692253B2 (en) | Continuous casting method of steel | |
| CN201211558Y (en) | Electromagnetic braking device for controlling molten metal flow in continuous casting crystallizer | |
| JP3119203B2 (en) | Unsolidified rolling method of slab | |
| JP3593328B2 (en) | Method for controlling flow of molten steel in mold and apparatus for forming electromagnetic field therefor | |
| JP2003164947A (en) | Continuous casting for steel | |
| EP0568699A1 (en) | Method of continuously casting steel slabs by use of electromagnetic field | |
| CN112974749A (en) | Electromagnetic stirring device and method for improving feeding capacity and center quality of casting blank liquid core | |
| CN114042906A (en) | Submerged nozzle and method for improving heavy rail non-metallic inclusion control | |
| JP5413277B2 (en) | Continuous casting method for steel slabs | |
| JP5125663B2 (en) | Continuous casting method of slab slab | |
| CN1134329A (en) | Method for production of one-way solidified ingot | |
| JP2000351048A (en) | Method and apparatus for continuously casting metal | |
| JP2010110766A (en) | Continuous casting apparatus for steel and continuous casting method for steel | |
| CN115301908A (en) | Method for improving internal structure of round billet by adopting tail end electromagnetic stirring | |
| JP2008264834A (en) | Tundish for continuous casting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: INDUSTRIAL INVESTMENT CO., LTD. OF DALIAN UNIVERS Free format text: FORMER OWNER: DALIAN UNIVERSITY OF TECHNOLOGY Effective date: 20070105 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20070105 Address after: 116024 No. 2 Ling Road, Ganjingzi District, Liaoning, Dalian Patentee after: Dalian University of Technology industry investment efficient Co Address before: 116024 No. 2 Ling Road, Ganjingzi District, Liaoning, Dalian Patentee before: Dalian University of Technology |
|
| ASS | Succession or assignment of patent right |
Owner name: DALIAN TECHNOLOGY UNIVERSITY, TECHNOLOGY TRANSFER Free format text: FORMER OWNER: DALIAN UNIVERSITY OF TECHNOLOGY INDUSTRY INVESTMENT CO., LTD. Effective date: 20070406 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20070406 Address after: 116024 No. 2 Ling Road, Ganjingzi District, Liaoning, Dalian Patentee after: Dalian University of Technology Technology Transfer Center Co Ltd Address before: 116024 No. 2 Ling Road, Ganjingzi District, Liaoning, Dalian Patentee before: Dalian University of Technology Industry Investment Company Limited |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040317 Termination date: 20130922 |