CN86106731A - The method and apparatus of continuous casting - Google Patents
The method and apparatus of continuous casting Download PDFInfo
- Publication number
- CN86106731A CN86106731A CN198686106731A CN86106731A CN86106731A CN 86106731 A CN86106731 A CN 86106731A CN 198686106731 A CN198686106731 A CN 198686106731A CN 86106731 A CN86106731 A CN 86106731A CN 86106731 A CN86106731 A CN 86106731A
- Authority
- CN
- China
- Prior art keywords
- mould
- foundry goods
- melt
- cast tube
- casting
- 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.)
- Pending
Links
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
- B22D11/10—Supplying or treating molten metal
-
- 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
- B22D11/045—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for horizontal casting
-
- 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
- B22D11/045—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for horizontal casting
- B22D11/047—Means for joining tundish to mould
-
- 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
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/114—Treating the molten metal by using agitating or vibrating means
- B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
-
- 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
- B22D11/14—Plants for continuous casting
- B22D11/146—Plants for continuous casting for inclined casting
Abstract
The horizontal continuous-casting method of a kind of usage level or inclination mould (1) and to the hot worked method of the foundry goods of partial coagulation at least in the mould.But the center line of smelting furnace or casting ladle winding mold verts, and melt wherein (13) injects mould through a cast tube (2), and the front end of cast tube protrudes into the opening of mould.Mould (1) can move relative to cast tube (2), and can rotate in a direction continuously or step by step around its center line, perhaps back and forth rotates.An electromagnetic repulsion force is from real acting radially on the melt (13) that flows into mould (1), thus the bridge joint of the solidified melt between the foundry goods top layer (20) that prevents to solidify in cast tube (2) and the mould (1).
Description
The invention relates to a kind of continuous casing, and process the foundry goods of from mould, pulling out thereupon with level or inclination mould, and the equipment of implementing this method.
The objective of the invention is to improve the reliability of casting technique, the quality and the surface smoothness of foundry goods, and can have the Foundry Production rate of more stable foundry technology process and Geng Gao than the horizontal continuous-casting method of prior art level.
According to traditional horizontal continuous-casting method, on storage tank, to the mould melt conveying, storage tank may be a casting ladle or a smelting furnace to mould, is called " casting ladle " hereinafter from it by tightly fixing and sealing-in.A jockey of chewing such as cast tube or casting is arranged between casting ladle and mould, also with the mould sealed attachment, therefore mould can not freely move apart casting ladle, cast tube or casting and chews, and is considered to very essential many functions thereby limited for a reliable casting process of vertical mould continuous casting installation for casting.
In these functions, also comprise the vibration of so-called mould, i.e. vertical the or reciprocating motion of mould, this motion only has the short stroke of 5-22mm on the pull-out direction of foundry goods, because it returns upper limit position rapidly, so claim that this motion is " demoulding stroke ".Usually than foundry goods a little hurry up, because this relative motion reduced melt and adhered to the tendency of die wall, so often this motion is called " negative strip " in the motion of the pull-out direction mould of foundry goods.Because the foundry goods top layer of solidifying rapidly and the existence of the friction between the die wall make any transversal crack that is produced by tension be compressed in demoulding stroke, then healing.Mould shows maximum thermic load during demoulding stroke, only is the short time certainly, but during this period of time concerning mould reach effective lubricating and certain heat recover long enough.In vertical mould, follow the slag particle of melt can rise to the surface of melt, and can be skimmed or mix mutually with employed what is called " casting powder ".Slag or powder fusing when contacting with bath surface, and go to below the meniscus between melt and the die wall.The foundry goods top layer that the molten mass of slag or powder is being solidified is toward drop-down and pass mould, thereby is formed on the lubricating layer between top layer and the die wall.And can not float slag particle to bath surface, will be distributed in equably on the cross section of vertical foundry goods.
By the horizontal casting of the method for using till today, situation is really not so, but slag particle floats and concentrate on the top of foundry goods.Between mould and casting ladle or its cast tube or casting are chewed connect and seal nipple promptly can not allow mould vibration (as mentioned above), can not make die wall lubrication, do not have other bonus yet.Owing to do not have lubricant or friction coat, the melt that is solidifying to have to adhere to the tendency on cast tube (chewing) or the die wall, make the fragility foundry goods top layer of solidifying in the stationary water flat-die that the danger of peeling off be arranged.
For the above-mentioned shortcoming and defect in the elimination of level casting, taked the way that foundry goods is progressively pulled out.In the quiescent period, the foundry goods top layer of solidifying in the mould has adequate time to increase thickness and intensity and is not subjected to tension, thereby makes foundry goods can bear tension well in its stage of pulling out.In order to ensure the top layer of foundry goods always in same place, the arrival end place that promptly is positioned at mould disconnects, joint between cast tube and mould is put into a so-called breading cap, it has less through hole than mould, thereby part reduces the heat conduction at this position and makes plane of weakness (the being fracture position) location of frozen metal.Although breading cap is made by very firm material, but still be subjected to huge wearing and tearing, thereby need often to change.
Owing to can't make with lubricator or sliding coating, utilize a lining to reduce the adhesion of melt sometimes to die wall, this lagging material has less adhesion tendency than common die bush and melt.Graphite is the most frequently used material that is used as lining, but it understands very quick-wearing, and particularly at the downside of mould, foundry goods compresses mould and makes this part mould stand maximum machinery and thermal stress with the gravity of himself, and the lining wearing and tearing are faster.Because when the irregular wear of mould, particularly foundry goods shrink, between the upside of foundry goods and mould, produce the space, the one-sided engagement in the mould must cause the non-equal thermal diffusion along the foundry goods contour.
Overcome in the present invention the horizontal casting method above shortcomings of using so far, and can keep the advantage of vertical die cast mentioned above. This characteristics of method and apparatus of the present invention have been disclosed in the dependent claims.
By the present invention, mould can rotate continuously or progressively around its center line, or back and forth rotates.In this way, the cooling effect that can all evenly improve (reinforcement) along the foundry goods contour, though because foundry goods is pressed in the downside of mould by himself gravity, and make this side stand maximum heat and mechanical stress, because of above-mentioned motion enables constantly to change.In casting during circular casting, between the top layer of foundry goods and mold surface, a contour relative motion will be arranged, because the rotation of mould and no longer have stiction, thereby therefore can reduce tension and reduce the crackle of pulling out of foundry goods.Rotatablely move and can reasonably connect with the oscillating phase of mould, so that mould only rotates when the demoulding stroke of foundry goods, this makes that demoulding stroke is a helix.
In addition, this motion of mould provides the possibility of simplifying the mould cooling system.This cooling system of having used in other respects comprises a tubular type mould that has outer coolant jacket, coolant jacket is used for quantity delivered and its cooling effect of even distribution cooling medium on every side along foundry goods, then can change this cooling system now with simpler method, promptly spray cooling agent on mould, this is because the rotation of mould can guarantee its even cooling.
The motion of mould can be finished by a separate type drive unit, perhaps from mould, pull out at foundry goods, when rotating (this will the following describes) by means of the frictional force that exists between foundry goods and die wall.Relative motion between foundry goods top layer and the die wall or progressively, impact rotation and can realize by the motion of braking mould.
The vibration of level or inclination mould promptly moves back and forth, and has the advantage of aforementioned vertical mode oscillation, and it can reach effective lubricating in demoulding stroke and heat is recovered, and pressing is by any possible transversal crack of negative strip generation.Yet, need effectively lubricating and heat to recover, be because the position of influenced maximum, molten metal contacts with die wall before forming the casting solidification top layer, and does not have melt when demoulding stroke, and the melt that promptly injects mould continuously is ostracised outside this part of mould.
From DE2548940, know, be installed in joint and pass to electromagnetism repulsive interaction that the control conductor of alternating current produced by means of one and stop melt to infiltrate junction surface between two pipes, one of them pipe can be movable, be undoubtedly a mould, and another Guan Ze is a ceramic pouring device, is injected into mould by its melt.
As what seen, melt must be expelled arbitrary surface of side, space, yet when mould vibrated, mould there was the danger that produces excessive seam or space between two pipes in the motion of casting direction, thereby makes melt leakage from this patent publications Fig. 5.For preventing this situation, the front end of cast tube is stretched in the mould, the length that stretches at least corresponding to oscillating movement dash (OK) journey, simultaneously, must electric conductor be installed in the outside of mould, to produce repulsion.
Certainly, the selection of current strength and frequency will be considered the electromagnetism conductance of the thickness and the formwork of die wall.Thickness for most of universal metal mold materials and die wall, the frequency of electric current is generally 60HZ or lower slightly, when casting large scale foundry goods, increase the frequency of electric current as need, then can use other materials at relevant mold section, particularly nonmetallic materials (as graphite) strengthen the electromagnetism conductance, and this material becomes the shape of a lining in mould, and jacket wall is towards the arrival end attenuation.
In the rotation of circular casting, reduced to produce the danger of longitudinal crack, and irrelevant, even the falcate contact wire between melt and die wall has indefinite distance along the contour of foundry goods from the end face or the cast tube mouth of mould with the motion of mould.This relation occurs in the situation of conductor loop centralised arrangement around the mould, because the static pressure that metal makes progress in the mould is greater than downward static pressure, this just downward static pressure has weakened the effect of equally distributed (pushing away) repulsion.Thereby impose on this repulsion that melt also acts on bent moon contact wire on the contour, can be by the known character of electromagnetic field itself its size of needed area change (weaken or strengthen), as passing through shielding, Unsymmetrical Winding, perhaps on conductor, connect another kind of material with increase length, thereby change the size of electric current.
On the growth that the above-mentioned reason that can reduce the vertical face crack of generation is the foundry goods top layer does not occur over just vertically for asymmetrical contact wire, and show on the contour of foundry goods.With respect to the contact wire of foundry goods (at this, contact wire tilts to an imaginary plane vertical with the mould center line), the growth on foundry goods top layer becomes a helix mode to carry out, therefore, the melt that the close die wall that can constantly be infeeded by the contraction of solidifying the foundry goods top layer contour that causes near the melt of die wall solidifies is compensated, thereby, melt can compensate contour and vertically shrink, and therefore the extexine of foundry goods also makes and oneself more be adapted to mould (interior) surface and mesh longer distance (than other situations) with cold die wall.Draw thus, hole between foundry goods top layer and the die wall will reduce, and when the foundry goods part of cooling off the poorest (forming hole when rotating owing to foundry goods) contacted with cold die wall again, the hole of formation was compared with other situations and will be appeared at the place farther apart from the bent moon contact wire.In pressing the continuous casting of usual method, the major defect that forms hole in the mould is that it makes mould almost lose cooling effect, suppressed the growth on foundry goods top layer, even make top layer remelting and weakening (attenuation), thereby crack (explosion of foundry goods top layer), owing to increase the static pressure of melt simultaneously, melt can spray mould again.Best die length is to manage to avoid above-mentioned shortcoming, so that foundry goods is cooled off as soon as possible by spray coolant, obviously, above-mentioned danger can not take place when foundry goods rotates, and does not need the outside of mould is directly cooled off rapidly.So the mould that can extend, generate crackle and the outer danger of melt ejection mould to eliminate fully.The Foundry Production rate also is improved thus, and mould will be the decisive factor of Foundry Production rate along the validity of its longitudinal space cooling foundry goods.
Because electromagnetic repulsion force makes melt leave die wall, particularly this repulsion causes forming the border, foundry goods top layer of an inclination, and feasible anti-friction agent by one or more ducts on the cast tube can carry out more all even effective lubricating.The outlet of cast tube can be stretched into the space between cast tube and the melt, and this stretches into part can comprise the duct that is used to supply and scatter anti-friction agent.When cast steel, anti-friction agent can contain plant or mineral oil, a kind of so-called casting powder or compare the lower a kind of metal of being cast of melting point metal, as lead, Vismuth, aluminium or other fusible metal alloy, should from the duct of cast tube lower position, import than the metal that the cast metal is heavier, lighter metal then should be passed to the top of mould or the position that mould moves on top, preventing that heavier metal from sinking to melt, or lighter metal floats into solution.The profile that the side had and the imaginary plane perpendicular to the mould center line that cast tube stretches into part have an inclination angle, are pushed into die wall and stretch into danger between the cast tube with the top layer of eliminating the rotation foundry goods.
Particularly horizontal casting owing to have very low pressure in the immobilising metal liquid core in foundry goods center, can not break through the metal that has solidified, and causes the center of foundry goods that the danger that produces hole is arranged.For increasing the pressure of liquid core, can be with foundry goods (or mould) in the certain angle of casting direction inclination, perhaps on casting direction, foundry goods top layer or wall are applied an electromagnetic force, the position, magnetic field should be that the temperature of foundry goods still is higher than its curie point, the intensity of conductor current and frequency are regulated according to the wall thickness that solidifies of foundry goods, as the rotary speed of foundry goods (mould) is also regulated in view of the above.
By the present invention, can cast tubular or hollow casting, it imposes on foundry goods by one and the electromagnetic force opposite with casting direction prevents that immobilising liquid core is full of the heart portion of foundry goods.The rotation of foundry goods guarantees also that except that foundry goods is had the uniform central duct it has uniform top layer or wall thickness.It usually is useful that electromagnetic field is divided into two or more parts, and the electric winding that produces these magnetic fields suitably is separated from each other according to its current strength and frequency, and can move separately or together along foundry goods.
In the time will casting thin-section casting (as pipe), at casting direction inclination mould and foundry goods is fairly simple, the melt plane of inside, foundry goods top layer or its length can be used for limiting the thickness of tube wall, because the rotation of foundry goods and cooling uniformly can obtain uniform wall thickness.But if use one to communicate with mould and casting ladle that the sub-center line of winding mold verts, the melt plane of inside, foundry goods top layer or length then by the inclination angle of casting ladle and wherein the level of melt decide.Otherwise, must control melt with additive method and flow into mould, as being embedded in pourer stopper on the casting ladle and link slot, a valve that is arranged in cast tube (between casting ladle and mould) with one, perhaps to passing through the melt Electromagnetic Control of cast tube.On the two-wire or multi-thread casting machine of a shared casting ladle, but the casting ladle that can not use the sub-center line of winding mold to vert, thereby be suitable for adopting the method control melt of above-mentioned back to flow into mould, the propelling of the pipe fitting of Cheng Xinging then comes corresponding finishing with oblique-roller therefrom, the same with common pipe fitting production method, cylinder also can have certain machined function.
The present invention will be described with reference to accompanying drawing, wherein:
Fig. 1. be side view and part longitudinal sectional drawing by present device.
Figure I A. is the profile along A-A line among Fig. 1.
Figure I B. is the profile along B-B line among Fig. 1.
Fig. 2. be side-looking and part longitudinal sectional drawing by equipment of the present invention.
Fig. 3. be the profilograph of a part in the present device.
Fig. 4. be side view by equipment of the present invention.
Fig. 5. be equipment schematic diagram according to Fig. 4.
Fig. 6-8. be the device that is used for further technical process by equipment among Fig. 4 and Fig. 5.
Represented a simple embodiment among Fig. 1, it comprises a mould 1, and it can move freely with respect to cast tube 2, and by spray liquid 4 coolings thereon.This mould has a simple pipe that is suitable for good conductive material (as copper) making, and And is supported by roller 5.6.Wheel rim 7 is housed on the roller, is used for matching with the groove 8 that in pipe, rolls out.Like this, mould pipe 1 longitudinal register simultaneously can be in this direction free wxpansion, and pipe 1 is equipped with the sprocket wheel 9 that is used for rotation or rotates (promptly rotating) in less than 360 ° scope at its discharge end, driven by a motor through whelp 11 and chain 10, this motor is reversible De And variable-ratio.The drive unit 12 of whelp 11 can several general modes dispose.
The electric installation that is connected with alternating current gets around mouthful seam 14 and the placement of mould pipe, its objective is in the seam of riving that prevents between melt infiltration pipe 1 and cast tube or the casting nozzle 2, casting nozzle 2 is fixed on the not shown casting ladle or smelting furnace, melt is given by casting nozzle and is delivered to pipe 1, the ac magnetic field that produces in the conductor alternating current of inducting in melt.
The result of this layout, be with the conductor direction vertical with its peripheral electromagnetic field on produce a repulsion, this repulsion forces melt to leave the slit in electromagnetic field effect zone and the surface of mould pipe.Can imagine the magnetic field of using direct current to produce, owing to be the electric current of same nature, if a non-magnetic object (i.e. melt under this situation) moves in a magnetic field, it is with cutting magnetic field, Dan Shi ， And can not guarantee whether the melt in the mould is enough big in the motion at the most close adjacent cast tube with die wall place.In a word, when stopping to cast consciously, promptly when separating static foundry goods, situation is not so just.Owing to this reason, the alternating current that matches at the magnetic conductivity of this selected frequency and middle die wall.The magnetic conductivity of intermediate and its thickness are depended on to the effect of repelling each other of melt in magnetic field, also play decisive role to the distance of conductor, so have reduced the mould pipe thickness of the die wall at (arrow 15 places) in this section.A kind of anti-friction agent is used for reducing the mould tube wall and solidifies friction between cast(ing) surface on it, is not attached to trend on the mould tube wall but do not reduce melt.Anti-friction agent is supplied with through pipe 16, pipe 16 be installed in mould pipe or cast tube or casting nozzle around, and should adapt with foregoing anti-friction agent, the metering of anti-friction agent is supplied with and can be finished by the screw rod that precession be positioned at pipe 16 extensions.
The roller 5.6 and the whelp 11 that are used for the rotation of mould pipe or rotate, together with its drive unit, be installed on the framework that is fixed in base plate 17, the vibration of then working as mould, promptly vertically move back and forth when needing rotation or rotating mould, base plate can be supported by wheel, wheel rim or needle bearing liner 18 as shown in the figure, and makes the reciprocating motion of mould and drive unit have low frictional force.
This reciprocating motion can use the plunger assembly 19 of eccentric wheel, cam or hydraulic pressure or air pressure to finish, as previously mentioned, here importantly on casting direction in the motion of mould, the table of mould medium casting (face) layer 20 is subjected to one along its pressure longitudinally, with the pressing of breaking that will produce in demoulding stroke.
Can realize the step motion of mould with a stepper motor, perhaps assemble a device that has the mould vibration, move a step so that mould changes when demoulding stroke.At this, can use a certain amount of circumference negative strip, i.e. mould revolution backward slightly is as the elastic reaction of the device by rotational motion is provided.
When producing the foundry goods of very tiny or different size, replace roller directly to support mould suiting with rolling ring, different mould sizes just can embed and roll in the ring.
When the casting ladle that can heat arbitrarily during to a single mould feed from one, a kind of good way is that casting ladle is verted, and the center line of mould is a turning cylinder, casting ladle should move at the horizontal and vertical of mould in addition, consider the position adjustments of the cast tube of casting ladle with respect to die orifice, a device that is used to raise and reduces casting ladle also is desired.
This cast tube can comprise wear-resistant materials with high melting point layer in, as zirconia, alumina content greater than 90% schmigel, magnesite etc., if should in pipe twine with resistive conductor, then can produce effective inhibition to the heat conduction
It is useful using the circumference negative strip when mould progressively rotates, and possible transversal crack just can be pressed together and heal, and can accomplish this point at an easy rate with chain or tape handler.Do like this by (for example) guide wheel and just can compress into a counter motion amount to non-driving running part.
Fig. 2 is the diagrammatic side view and the part vertical cross section of a foundry goods in the casting factory of a plurality of production lines, and this plant produced hollow casting has pipe, the hollow shaft of required wall thickness or the hollow blank that is used to process etc. as production.24 pairs of all moulds 21 of casting ladle and be shared at the acclivitous foundry goods 20 of casting direction, at this, foundry goods can be of different sizes.The lateral clearance supposition of mould and foundry goods is unmodifiable, therefore the cast tube that is loaded on the casting ladle also must be constant with the gap that protrudes into mould, also promptly be not subjected to the influence around the thermal expansion of the armor of cast packet cover 24, Given this, this armor is enclosed between each cast tube should be equipped with coolant jacket.
Casting ladle is placed on the slide 27, its can by plunger assembly 26 foundry goods vertically on move.Slide 27 is parts of support 28, and this support can transversely moving at foundry goods.This device can be changed fast with empty casting ladle.
By conductor 30 induced electromagnetic fields that pass to high heavy current and place with near the pipe same level the mould 21, this configuration is necessary, it will make the mobile unlikely upset by the melt of cast tube 22, can prevent very easily in other words, according to SE417484, even only be to prevent that melt from infiltrating the gap between mould and the pipe, also will be so usually.Under certain condition, this method can be used in combination with the present invention, will more carefully introduce it below.
Head roll tilts with respect to the center line of foundry goods, and make center foundry goods 20(at this for solidifying the foundry goods top layer in the mould 21) be rotated motion, if the rotary speed on foundry goods top layer with respect to foundry goods to pull out speed enough big, then the skin depth of Xing Chenging also is that the wall thickness of foundry goods is the same along its circumference place.If want this device to reset, then the drive unit of foundry goods can be placed on the rotatable seat board, and pull out the rotary speed of speed by means of its relative of gradient that it can change cylinder with foundry goods, in this case, yes makes all cylinders or is level or is uprightly but not laterally is the simplest, as shown in Figure 2.
The rotation of mould or rotation are finished by a drive unit, and according to Fig. 2, this drive unit comprises 31, one chain and sprocket driving devices 33 of motor and the sprocket wheel that is anchored on the mould pipe that have clutch 32.In some cases, enough big by the rotation of the mould that frictional force produced 21 that stops rotation foundry goods 20 to be pulled out, at this moment can holdback clutch 32 disconnect the drive unit of moulds.A brake apparatus can be installed with periodic braking or stop this motion, as act on this device of half of clutch, and can start or stop by an electromagnet.
Can foundry goods be cut into needed length with usual way, yet a rotating foundry goods can provide several moulding hot worked possibility, so several examples will provide in the description afterwards.
The method for drawing out of foundry goods 20 can selectively be realized, so just can realize a certain amount of hot-working, as make foundry goods have certain size or shape.Yet producing in the technical process of bar continuously, installing a forging machine after head roll perhaps also is a rational solution.Owing to the needed instrument of this generic operation is made by being suitable for hot worked material, and must part cool off by suitable medium in fact.
Certainly, process operation above-mentioned also can be applicable in the horizontal continuous-casting of solid bar, perhaps after foundry goods is given suitable size by cylinder, as shown in Fig. 6 and Fig. 7.
According to the horizontal cast of Fig. 1 casting,, can rotate or rotate with similar among Fig. 2 along the acclivitous hollow casting of transmission direction.Particularly in the horizontal casting of steel and other refractory metal, the immobilising not solidified melt of foundry goods inside will stretch and the shape that promptly tapers off to a point, so that often produce shrinkage cavity and shrinkage porosite in the central area of foundry goods.Its reason is before the heart portion of foundry goods solidifies fully, interrupted crystallization melt connection bridge has more or less cut off the melt supply to the core tip, Another reason is to be connected the core that bridge is shed to crystallization with crystallization because temperature progressively reduces, and causes the viscosity increase of the melt heart portion that more and more attenuates inside the foundry goods.Since melt the static pressure at tip too a little less than, go to fill the shrinkage cavity of adding solidification shrinkage and producing so can not oppress melt.Carrying out electromagnetic agitation at the melt to foundry goods heart portion tip improves and has obtained some achievements aspect the interior tissue of foundry goods.Yet can be by with the downward-sloping certain angle of foundry goods with foundry goods is rotated reduce the static pressure at heart portion tip, thereby reduce in foundry goods, to be formed centrally the trend of defective.
Fig. 3 for example understands a kind of device, and wherein mold part and foundry goods tilt in the direction of casting, knows also that at this how to make mould pipe 21 roughly the same with a class that is used for vertical casting at coolant jacket 40() rotation or rotation.Electromagnetic inductor 41 perhaps is equipped with the magnetic material sheets being that is welded into one at least by magnetic material system, and its coolant jacket 40 of packing into is interior in order to prevent that leaking the eddy current heats cold but overlaps.Be used for promoting and strengthen magnetic flux by laminating clip that steel plate forms around conductor.When casting large scale foundry goods, a device and the device of the present invention 41,42 by patent SE417484 can be used together.Lamination ring 44 between electric conductor 43 and the cast tube 45,46 be used for preventing to point to radially electromagnetic force is surrounded and disturbance through melt 23 streams of cast tube 45,46.
For stoping melt to cling die wall, should be unconscious crooked between cast tube and mould, cast tube 45 outside outer surfaces are made convex (at the arrow A place) slightly.Owing between melt and conductor, do not have conductive material, so the electric current of the electric current higher frequency of passing through in can in the conductor 43 around the cast tube, passing to this moment than conductor around mould.For higher power frequency, though electromagnetic repulsion force is lower, but the induction heat in melt will be bigger, and this helps to prevent that solidified melt is to the adhesion of cast tube with prevent to solidify in melt and the mould bridge joint between the top layer in the zone of electromagnetic inductor (being installed in the outside of mould) action interrupts.
When foundry goods passed to DC current by a static cutting machine cutting and inductor 41, above-mentioned configuration was favourable.In cutting operation, need stop the foundry goods motion, therefore bath movement also stops, cause repulsion action interrupts from the direct current inductor, because continuing has the effect that exchanges conductor 43, thereby may between cast tube 45 and top layer 20, produce the melt bridge joint, so just can stop the gap between melt infiltration die wall and the cast tube 45, simultaneously since not between moving period the thickness on top layer and intensity continue to manage to increase, make foundry goods when restarting to advance (pulling out mould), can stand to add thereon extra tension, because well-known, stiction is greater than force of sliding friction.
Shown in Fig. 4-8 is the example of pressing several different application of equipment of the present invention, the casting machine of Fig. 4 for seeing from a side.Fig. 5 is the casting machine of overlooking.The foundry goods that casts out in casting machine and rotate is cut into desired length with usual way (with the spray gun 51 shown in Fig. 4 and Fig. 5), perhaps alternately directly introduces in roll stand or the forging machine.
Among Fig. 6, used a planetary rolling mill, be characterized in that polynary cone-shaped roll 67 is along the planetary driving of the circumference of foundry goods 21, to give foundry goods desired size, if desired, can carry out surface treatment to the rotation foundry goods, cut oxide skin technology or, also can or carry out the thermal balance stretching its heating by of the processing of one or more scrapers of installing along foundry goods to foundry goods as defibrator process.
When foundry goods rotates, the planetary rolling mill shown in Fig. 5 can by among Fig. 7 fixedly rotary roller 68 replace, thereby make the driving of roller drive ratio milling train simpler.Though only represented a pair of roll of clamping foundry goods circumference and relative point in this schematic diagram, can use three or more rolls in order to prevent to break and in foundry goods, be formed centrally hole.If desired, rolling device can change into manual.
The advantage of direct rolling rotation foundry goods is by adjusting the roll gap between the roll, even in a foundry technology process, also can access different casting dimensions to a kind of foundry goods of same size.
Then, still rotation and and uncut rolling foundry goods 21, perhaps stretching (not shown) afterwards by further heating or thermal balance, be sent to a common milling train (strengthening bar or wire rod) as being used for producing, for this reason, must stop the rotation of foundry goods.According to Fig. 8, above-mentioned requirements can be solved by following method: rotary roller conduit 69 is sent the foundry goods in the loop configuration 70 into swing roller 71, again milling train 72 is pulled out and sent into to foundry goods along the tangent line of cylinder and carries out further rolling or moulding.If necessary, a temperature-adjusting device (not indicating in the drawings) also can be installed in cylinder.
According to Fig. 4 and Fig. 5, casting is to be finished by a ladle 54 that has slip cast gate 52 and cast tube 53.Be used for making the suitably adjusting automatically of filling plane in the casting ladle relatively of cast gate 53 that melt flows into casting ladle 24.By means of a plunger assembly 55, the center line of casting ladle 24 winding molds 20 and foundry goods is tilted, and can suitably regulate automatically the melt plane in the casting ladle 24.In order to change rapidly with empty casting ladle, each new ready casting ladle is placed on one can be on the support 56 that transversely moves of casting direction, make support 56 motions, having cast tube 22(cast tube stretches in the die orifice) casting ladle 24 must on the longitudinal direction of mould, move, therefore casting ladle is placed on the slide 57, can make slide move apart casting position fast by plunger assembly 58.Aforementioned electromagnetic inductor around pipe die 20 front ends is represented with numeral 59.Because the mould rotation makes and just can be cooled off uniformly its direct water spray 60.Drive unit 61 is finished the rotation or the rotation of mould, and realizes lengthwise oscillations by cylinder 62.63 are the secondary cooling, 64 for being used to rotate the idler pulley of foundry goods 21, device 65 along foundry goods is used to propagate the electromagnetic action that imposes on the melt of foundry goods center, the oblique-roller 66 that is used for foundry goods 21 rotation propellings is placed on different planes, if but wish to make the rotation of foundry goods to advance speed to regulate with respect to it, cylinder is only nibbled by foundry goods from both direction, so that driving is comparatively simple, this mentioned in relevant with it Fig. 2.For clarity, the drive unit of cylinder does not indicate in the drawings, and its available different commonsense method realizes, certainly, with respect to the position at molten metal heart portion tip, the propelling speed of foundry goods can be regulated.The tip of molten metal heart portion can be measured by the method for ultrasonic wave and so on.Since the repulsion that produced of electromagnetic inductor 59 must be slightly greater than at mould than the dominant static pressure of lower part, so, also be fit to adopt current strength in the inductor and/or power frequency are controlled automatically with respect to the melt level of indicating in the casting ladle.
As described above, the whole operation sequence of an equipment can realize automation with general control and automatics, and only needs a small amount of staff. Here have a very big advantage to be, so a kind of equipment can be installed on the ground, thereby can save a large amount of expenditures of construction, and carrying, intermediate storage and the expense of heating account for most that finish manufacturing expense, also can reduce.
Claims (28)
1, the continuous casting of a kind of usage level or inclination mould and in the mould at least the foundry goods of partial coagulation carry out hot worked method, but smelting furnace that melt verts from the center line of winding mold or casting ladle also are transferred to the mould by the cast tube that a front end protrudes into die orifice, it is characterized in that being prevented to solidify in cast tube and the mould by an electromagnetic repulsion force bridge joint of the solidified melt between the foundry goods top layer, electromagnetic repulsion force comes down to act on the melt that flows into the mould from radial direction.
2, according to the described continuous casing of claim 1, it is characterized in that mould can move with respect to cast tube, and rotate in one direction continuously or step by step around its center line, perhaps back and forth rotate.
3, in accordance with the method for claim 2, it is characterized in that making it generation from mould when foundry goods is pulled out rotatablely moves.
4, in accordance with the method for claim 2, it is characterized in that mould is in its lengthwise oscillations.
5,, it is characterized in that making repulsion to have an effect unevenly along the contour of the melt that flows into mould according to the described method of arbitrary claim of front.
6,, it is characterized in that the tip of being fixed in the cast tube on smelting furnace or the casting ladle opens the feeding die orifice according to the described method of the arbitrary claim in front.
7, according to the described method of the arbitrary claim in front, the front end that it is characterized in that cast tube has at least a part to protrude into by electromagnetic repulsion force to have drained among the part of melt, this cast tube protrudes into and is partly with one or more ducts, anti-friction agent is transported to the surface of mould.Protrude into the outside of part, relative with the gyrobearing of foundry goods, the shape that it had can reduce owing to rotate and to make the foundry goods top layer of having solidified push danger among the space between cast tube and die wall.
8, in accordance with the method for claim 3, it is characterized in that advancing the upstream of drive unit to impose an electromagnetic force at foundry goods, act on casting direction and static liquid metal core but be actually, thereby on the foundry goods top layer or wall thickness prevent that melt is full of foundry goods fully when reaching necessarily required thickness, and form tubular cast.
9, according to the described method of the arbitrary claim in front, it is characterized in that foundry goods, perhaps after stretching by temperature balance, by the circular cone Roller Machining to desired cross section.
10, in accordance with the method for claim 9, it is characterized in that after foundry goods is through a temperature balance stretching area that the circular cone roll is capable can the rotation around foundry goods of star formula.
11, in accordance with the method for claim 9, it is characterized in that the circular cone roll fixes.
12, be subordinated to claim 2 like that the time by claim 3 or 10(by it) described method, it is characterized in that the pipe guide that rotates with foundry goods by one rotatablely moving of foundry goods being converted to the screw that draws off foundry goods along tangent line.
13,, it is characterized in that mould and foundry goods are downward-sloping on the direction of casting, to increase the static pressure at liquid metal tip by the described method of the arbitrary claim in front.
14, by the described method of the arbitrary claim in front, it is characterized in that mould and foundry goods are inclined upwardly in the direction of casting, the horizontal plane and the length of the inner also not solidified melt in foundry goods top layer are regulated according to the desired wall thickness of tubulose that is shaped.
15, by the described method of the arbitrary claim in front, it is characterized in that keeping desired static pressure in the mould by the casting ladle or the smelting furnace that can vert around the center that overlaps with the mould center line, its tilt angle is according to around mould and provide the induction reactance value in the conductor of electromagnetic force to control.
16, by the described method of the arbitrary claim in front, it is characterized in that the device of melt under being in vacuum charges into the mould.
17, method according to aforementioned arbitrary claim, its facilities and equipments comprise: a) casting ladle that has cast tube, cast tube is fixed on the casting ladle in order to transmit melt to mould from casting ladle, b) mould that is cooled of level or inclination, c) be used for drawing off and carrying mould to cast out the cylinder (forts krav 17) of foundry goods, d) a secondary cooling zone section between discharging or conveying cylinder and mould, cooling tube with band nozzle and supporting roller, e) foundry goods separator, can after at first finishing hot-working, just use on foundry goods this device, it is characterized in that: mould is installed for movable, enables rotation or partial rotation (rotation) and lengthwise oscillations; Inductor from the power supply power supply is positioned on the outside of mould, near the feed end of mould; Has the drive unit that is used for the mould motion.
18,, it is characterized in that casting ladle is contained on a slide and the support, with quick replacing casting ladle according to the described equipment of claim 17.
19,, it is characterized in that mould rotation or the drive unit that rotates can regulate and can separate with mould according to claim 17 or 18 described equipment.
20, press the described equipment of arbitrary claim among the 17-19, it is characterized in that mould comprises the simple metal pipe of the cooling of spraying water thereon.
21,, it is characterized in that mould embeds in the coolant jacket and near its sealing, so that the mould pipe can rotate or rotation and expanded by heating by the described equipment of arbitrary claim among the claim 17-20.
22, according to the described equipment of arbitrary claim among the claim 17-21, it is characterized in that stretching into the shape that front end had of the cast tube of die orifice, make the part of cast tube wall stretch into and got rid of around the electromagnetic inductor of mould in the space of melt; Pull out in the process of foundry goods when foundry goods is rotated or is mobile, the foundry goods top layer of solidifying that invests die wall is not pushed among the front end and the slit between the die wall that cast tube stretches into part.
23,, it is characterized in that a kind of anti-friction agent being passed to die wall by one or more ducts of stretching into part at cast tube by the described equipment of claim 22.
24, press the described equipment of arbitrary claim among the 17-23, it is characterized in that drawing off or transferring roller and foundry goods are inclined to certain angle and install, thereby cause the rotation of foundry goods to be pulled out or translatory movement.
25, according to the described equipment of claim 24, it is characterized in that drawing off or transferring roller is installed on the rotatable support, enable the angle between conversion cylinder and the foundry goods, and corresponding change foundry goods rotatablely move and the transmission speed of foundry goods between relation.
26, according to the described equipment of arbitrary claim among the 17-25, it is characterized in that planetary rolling mill be installed in draw off or conveying cylinder after, in order to foundry goods is rolled into desired size.
27, according to the described device of arbitrary claim among the claim 17-25, it is characterized in that rolling device be installed in draw off or conveying cylinder after, and contain one or more sets and drive roll, but three rolls will be arranged at least.Roll be fixed in the foundry goods that rotatablely moves around and the push-tight foundry goods, so that its compression is rolled down to needed size.
28, according to the described equipment of arbitrary claim among the claim 17-27, it is characterized in that having a device, be used to suppress rotatablely moving of foundry goods, it comprises one with corresponding to the rotation mode of foundry goods and the bending conduit that rotates, and the foundry goods in can the conveying annular structure.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8504252A SE464619B (en) | 1985-09-13 | 1985-09-13 | SETTING AND PLANTING FOR STRENGTHENING WITH HORIZONTAL OR SLEEPING COCKLE |
| SE8504252-1 | 1985-09-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86106731A true CN86106731A (en) | 1987-05-13 |
Family
ID=20361379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN198686106731A Pending CN86106731A (en) | 1985-09-13 | 1986-09-13 | The method and apparatus of continuous casting |
Country Status (18)
| Country | Link |
|---|---|
| EP (1) | EP0237558B1 (en) |
| JP (1) | JPS63500925A (en) |
| KR (1) | KR870700426A (en) |
| CN (1) | CN86106731A (en) |
| AT (1) | ATE71864T1 (en) |
| AU (1) | AU587867B2 (en) |
| BR (1) | BR8606863A (en) |
| DE (1) | DE3683635D1 (en) |
| DK (1) | DK241487D0 (en) |
| ES (1) | ES2001785A6 (en) |
| FI (1) | FI872097A (en) |
| HU (1) | HUT43518A (en) |
| NO (1) | NO871949L (en) |
| PT (1) | PT83360B (en) |
| SE (1) | SE464619B (en) |
| SU (1) | SU1695822A3 (en) |
| WO (1) | WO1987001632A1 (en) |
| ZA (1) | ZA866963B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102497940A (en) * | 2009-07-30 | 2012-06-13 | Sms西马格股份公司 | Device and method for detecting the pressure distribution of a cooling medium applied in a continuous casting plant or rolling mill train |
| CN103231032A (en) * | 2013-05-28 | 2013-08-07 | 辽宁恒大重工有限公司 | Vacuum continuous casting device and method for alloy billets |
| CN111112566A (en) * | 2019-12-30 | 2020-05-08 | 燕山大学 | Method for improving thread quality of internal thread copper pipe and horizontal continuous casting device thereof |
| CN114472833A (en) * | 2022-01-04 | 2022-05-13 | 河南科技大学 | Rotary furnace body type hot continuous casting device for horizontal continuous casting |
| CN115319035A (en) * | 2022-08-19 | 2022-11-11 | 眉山市博眉启明星铝业有限公司 | Casting device of aluminum ingot continuous casting production line |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4432333A1 (en) * | 1994-09-10 | 1996-03-14 | Iloma Automatisierungstechnik | Method and device for producing molded articles from polymer concrete |
| WO2002002880A1 (en) * | 2000-07-03 | 2002-01-10 | Caroma Industries Limited | An improved method of installing a toilet suite and improved components relating to same |
| EP2025432B2 (en) * | 2007-07-27 | 2017-08-30 | Concast Ag | Method for creating steel long products through strand casting and rolling |
| DE102017108394A1 (en) * | 2017-04-20 | 2018-10-25 | Inteco Melting And Casting Technologies Gmbh | Method and device for producing cast blocks from metal |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2837791A (en) * | 1955-02-04 | 1958-06-10 | Ind Res And Dev Corp | Method and apparatus for continuous casting |
| DE1023197B (en) * | 1955-03-12 | 1958-01-23 | Degussa | Device for pulling off cast strands in the continuous casting process |
| CH482480A (en) * | 1968-07-19 | 1969-12-15 | Olsson Ag Erik | Device for continuous casting |
| US3598173A (en) * | 1968-10-17 | 1971-08-10 | Olin Mathieson | Continuous casting machine having a variable mold length and adapted for casting in a variety of sizes at high speed |
| CH578389A5 (en) * | 1974-06-15 | 1976-08-13 | Von Roll Ag | Horizontal continuous casting plant for cast-iron - or non-ferrous metals, using intermediate mould chambers on rotary table |
| FR2480156A2 (en) * | 1980-04-15 | 1981-10-16 | Creusot Loire | DEVICE FOR CONTINUOUS CASTING OF METALS, IN PARTICULAR STEEL |
| JPS57209752A (en) * | 1981-06-17 | 1982-12-23 | Kawasaki Heavy Ind Ltd | Horizontal continuous casting installation |
| JPS58356A (en) * | 1981-06-25 | 1983-01-05 | Kawasaki Heavy Ind Ltd | Horizontal and continuous casting installation |
| NL8303562A (en) * | 1983-10-17 | 1985-05-17 | Philips Nv | DEVICE FOR DISPLAYING INFORMATION FROM AN OPTICALLY READABLE RECORD CARRIER. |
| US4477542A (en) * | 1983-12-12 | 1984-10-16 | Braswell Richard R | Quick release storage battery closure assembly |
| FR2565302B1 (en) * | 1984-06-05 | 1986-10-10 | Aerospatiale | PROVISIONAL SECURITY DEVICE IN THE SPACE OF TWO PIECES EDGE TO EDGE |
| US5543787A (en) * | 1994-03-23 | 1996-08-06 | International Business Machines Corporation | Keyboard with translating sections |
| EP0684021A1 (en) * | 1994-05-26 | 1995-11-29 | TFX Medical | Stent with mutually linked wires |
-
1985
- 1985-09-13 SE SE8504252A patent/SE464619B/en not_active IP Right Cessation
-
1986
- 1986-09-11 PT PT83360A patent/PT83360B/en not_active IP Right Cessation
- 1986-09-12 ES ES8601888A patent/ES2001785A6/en not_active Expired
- 1986-09-12 ZA ZA866963A patent/ZA866963B/en unknown
- 1986-09-13 CN CN198686106731A patent/CN86106731A/en active Pending
- 1986-09-15 BR BR8606863A patent/BR8606863A/en not_active IP Right Cessation
- 1986-09-15 JP JP61504968A patent/JPS63500925A/en active Pending
- 1986-09-15 DE DE8686905974T patent/DE3683635D1/en not_active Expired - Fee Related
- 1986-09-15 EP EP86905974A patent/EP0237558B1/en not_active Expired - Lifetime
- 1986-09-15 AT AT86905974T patent/ATE71864T1/en not_active IP Right Cessation
- 1986-09-15 WO PCT/SE1986/000411 patent/WO1987001632A1/en active IP Right Grant
- 1986-09-15 HU HU864394A patent/HUT43518A/en unknown
- 1986-09-15 AU AU63747/86A patent/AU587867B2/en not_active Ceased
-
1987
- 1987-05-11 SU SU874202602A patent/SU1695822A3/en active
- 1987-05-12 NO NO871949A patent/NO871949L/en unknown
- 1987-05-12 KR KR870700465A patent/KR870700426A/en not_active Application Discontinuation
- 1987-05-12 FI FI872097A patent/FI872097A/en not_active Application Discontinuation
- 1987-05-12 DK DK241487A patent/DK241487D0/en unknown
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102497940A (en) * | 2009-07-30 | 2012-06-13 | Sms西马格股份公司 | Device and method for detecting the pressure distribution of a cooling medium applied in a continuous casting plant or rolling mill train |
| CN103231032A (en) * | 2013-05-28 | 2013-08-07 | 辽宁恒大重工有限公司 | Vacuum continuous casting device and method for alloy billets |
| CN111112566A (en) * | 2019-12-30 | 2020-05-08 | 燕山大学 | Method for improving thread quality of internal thread copper pipe and horizontal continuous casting device thereof |
| CN114472833A (en) * | 2022-01-04 | 2022-05-13 | 河南科技大学 | Rotary furnace body type hot continuous casting device for horizontal continuous casting |
| CN114472833B (en) * | 2022-01-04 | 2023-09-01 | 河南科技大学 | Rotary furnace body type heating type continuous casting device for horizontal continuous casting |
| CN115319035A (en) * | 2022-08-19 | 2022-11-11 | 眉山市博眉启明星铝业有限公司 | Casting device of aluminum ingot continuous casting production line |
| CN115319035B (en) * | 2022-08-19 | 2023-10-31 | 眉山市博眉启明星铝业有限公司 | Casting device for aluminum ingot continuous casting production line |
Also Published As
| Publication number | Publication date |
|---|---|
| HUT43518A (en) | 1987-11-30 |
| WO1987001632A1 (en) | 1987-03-26 |
| DE3683635D1 (en) | 1992-03-05 |
| AU587867B2 (en) | 1989-08-31 |
| PT83360A (en) | 1986-10-01 |
| SE8504252L (en) | 1987-03-14 |
| EP0237558B1 (en) | 1992-01-22 |
| ATE71864T1 (en) | 1992-02-15 |
| AU6374786A (en) | 1987-04-07 |
| KR870700426A (en) | 1987-12-29 |
| PT83360B (en) | 1993-01-29 |
| JPS63500925A (en) | 1988-04-07 |
| FI872097A0 (en) | 1987-05-12 |
| DK241487A (en) | 1987-05-12 |
| NO871949D0 (en) | 1987-05-12 |
| SU1695822A3 (en) | 1991-11-30 |
| NO871949L (en) | 1987-07-07 |
| DK241487D0 (en) | 1987-05-12 |
| SE8504252D0 (en) | 1985-09-13 |
| SE464619B (en) | 1991-05-27 |
| FI872097A (en) | 1987-05-12 |
| EP0237558A1 (en) | 1987-09-23 |
| ES2001785A6 (en) | 1988-06-16 |
| BR8606863A (en) | 1987-11-03 |
| ZA866963B (en) | 1987-05-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101722288B (en) | Method for preparing local particle reinforced aluminum alloy cylinder sleeve by semi-solid casting technology | |
| CN86106731A (en) | The method and apparatus of continuous casting | |
| US2871534A (en) | Method of continuous casting | |
| EP1611979A1 (en) | Controlled fluid flow mold and molten metal casting method | |
| US3794105A (en) | Oscillating wall arrangement for a continuous casting mold | |
| CN1169640C (en) | Electromagnetic continuous casting method of hollow metal tube blank | |
| CN1273243C (en) | Strip sheet casting | |
| CA1175633A (en) | Oscillating mold casting apparatus | |
| CN103934427A (en) | Centrifugal casting method for asymmetric annular high-lead bronze casting | |
| US6523601B1 (en) | Method and apparatus for improving internal quality of continuously cast steel sections | |
| EP0448773A2 (en) | Continuous caster mold and continuous casting process | |
| CN1326829A (en) | Heating casting mold and gas film continuous casting method | |
| EP0103606B1 (en) | The use of a hydraulic squeeze film to lubricate the strand in continuous casting | |
| CN1025944C (en) | Centrifugal semi-continuous casting method for pipe and apparatus thereof | |
| CN1806961A (en) | Continuous casting device for composite high-speed steel rolls | |
| CN1290642C (en) | Process and special crystallizer structure of continuous casting and drawing pigots | |
| CN1022295C (en) | Device for continuous casting of thin metal products between rolls | |
| CN2860681Y (en) | Electromagnetic separating continuous preparing device for metal-base autogenic gradient composite pipe | |
| CN1676240A (en) | Electromagnetic separating continuous preparing method and equipment for metal-base autogenic gradient composite pipe | |
| JPS62144856A (en) | Continuous casting method | |
| CA1276427C (en) | Method and apparatus for continuous casting | |
| JPS63188459A (en) | Continuous casting method for round cast billet | |
| JPS5913298B2 (en) | Horizontal continuous casting method | |
| JP2626795B2 (en) | Continuous casting of molten steel | |
| KR20110120544A (en) | Jig for drawing bubbling cone of ladle and method for drawing bubbling cone using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |