CN203639530U - Composite electroslag casting device for optimizing metal solidification structure by using steady-state magnetic field - Google Patents
Composite electroslag casting device for optimizing metal solidification structure by using steady-state magnetic field Download PDFInfo
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- CN203639530U CN203639530U CN201320838387.9U CN201320838387U CN203639530U CN 203639530 U CN203639530 U CN 203639530U CN 201320838387 U CN201320838387 U CN 201320838387U CN 203639530 U CN203639530 U CN 203639530U
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Abstract
The utility model discloses a composite electroslag casting device for optimizing a metal solidification structure by using a steady-state magnetic field. A magnetic body capable of exerting a steady-state magnetic field is arranged at the periphery of an inner tube of a water cooled crystallizer, so that the liquid-solid solidification interface region is positioned below the steady-state magnetic field, meanwhile, an alternating current is exerted to metal melt in the liquid-solid solidification interface region by virtue of a voltage-regulating and frequency-regulating alternating power supply, and interacts with the added steady-state magnetic field, so that the liquid metal is subjected to the stirring and shock excitation actions of multi-directional alternating lorentz force, formation of a microcell flow field in liquid metal at the front edge of the liquid-solid solidification interface is facilitated, and a metal molten pool forms a microcell ring flow which flows clockwise or anticlockwise now and then. Thus, the liquid metal in the unset area of the overall continuously casting billet is stirred and vibrated; dendrite at the front solidification edge of the unset area of the overall continuously casting billet is smashed. Thus, the solidification structure of the continuously casting billet is refined. The composite electroslag casting device is applied to continuous casting and refining of alloy steel electroslag, the solidification structure of an electroslag ingot can be significantly refined, and radial and axial segregation in the electroslag ingot is reduced.
Description
Technical field
The utility model relates to a kind of electroslag casting process device, and particularly one is passed through electromagnetism compound action in metal pool and ingot casting liquid-solid interface, and the process unit of the metal solidification texture that is optimized.
Background technology
Tradition electroslag continuous casting process is to utilize resistance heat that electric current produces by slag that consumable electrode is progressively melted and is dropped in water mold below and pools metal pool, and keep molten metal constantly by under crystallizer cooling effect, the continuous casting process process pulling straight from the outlet of crystallizer below after the duricrust that congeals into.In the process of electro-slag continuous casting metal and alloy, particularly in large size alloy casting process, because size reason and cooling conditions have limited continuous casting heat transfer process, strand often forms thick column crystal or dendrite, in general, ingot casting diameter is larger, and liquid cave is darker, local solidification time is longer, and the dendrite interval causing is larger; In addition, at strand center, because the bridging of dendrite intercepts, interdendritic aluminium alloy solidification shrinkage, forms a large amount of shrinkage cavity and porosities, serious center segregation this by further worsening the performance of electro-slag continuous casting base, even cause scrapping of large-scale electroslag ingot blank.
For addressing this problem, two kinds of methods of normal employing in electro-slag continuous casting industry at present: the first, split type current-conductive mold method, by reheating to guarantee the uniformity of temperature profile in metal pool, reaches the problem that reduces dendrite interval and center segregation.This method production efficiency is low, less economical, and control error is large.Second, adopt the electroslag casting method of additional alternating electromagnetic field, existing rotary magnetic field stirring technology, high frequency magnetic field, intermediate frequency magnetic field, low frequency magnetic field technology etc., these technology all adopt alternating magnetic field to see through crystallizer, generate exchange current again with action of alternating magnetic field, form stir lorentz's force.The greatest problem of these methods is, alternating magnetic field must see through the good crystallizer material of heat-conductivity conducting as copper, stainless steel, graphite, aluminium and alloy thereof etc., this will expend a large amount of electric energy, the molten steel region of the inside steel billet having solidified to be penetrated into simultaneously, a large amount of electric energy need to be expended equally.This has significantly increased production cost, makes the efficiency of electromagnetic fining continuous casting billet structure greatly reduce simultaneously.
To sum up, adopt current electro-slag continuous casting technique cannot avoid the problems such as large-scale electro-slag continuous casting ingot dendrite is thick, and segregation is serious, these defects make electro-slag continuous casting have significant limitation in the production of large-scale resmelting ingot.Therefore, exploitation is more efficient has become with electromagnet exciting device less energy-consumption the problem of needing solution badly.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, and provide a kind of steady magnetic field that utilizes to optimize the compound electroslag molten casting device of metal solidification texture, in the process of electro-slag continuous casting metal by applying vertical with the sense of current multipair static magnetic field that isogonism magnetic pole produces that is mutually, by electromagnetism compound action in metal pool and ingot casting liquid-solid interface, and the solidified structure that is optimized is realized the efficient control to solidified structure in ESR ingot and component segregation.The in the situation that of smooth electro-slag continuous casting, utilize electromagnet exciting technology, utilize the exchange current of itself in modulated magnetic field and esr to interact, in continuously cast bloom, produce alternation lorentz's force, stir the liquid-solid miscible district in forward position, freezing interface, smash dendrite, form nucleus multiplication effect, the equiaxed grain structure that acquisition volume fraction is larger or the dendritic structure of refinement; Reduce the thermograde in forward position, freezing interface simultaneously, tended towards stability in interface, liquid cave, thereby obtain the esr continuously cast bloom tissue of axial growth, reduce and even eliminate component segregation and center porosity.
For achieving the above object, design of the present utility model is:
It is tiny that the electromagnetic exciting technology that adopts power frequency own in the multipair compound electroslag remelting process of magnetic pole that is mutually isogonism or low frequency electricity to produce reaches smooth organization of production, the esr continuously cast bloom that composition homogenizes.The permanent magnetic iron block ring group that multipair (n >=2) are mutually isogonism is set in the outer ring of common copper mold crystallizer, guarantees towards the magnetic pole of central axis it is that extremely (or N extremely alternately arranges to the N utmost point N, fixes the position of magnetic pole in stainless steel water-cooled cover to the S utmost point.The steady modulated magnetic field of arranging does not like this have the related magnetic shielding problem of other electromagnetic technique and eddy-current loss problem for crystallizer material, continuously cast bloom shell, and steady magnetic field produces by permanent magnet, therefore without consuming any energy consumption.Consumable electrode termination and the remelting continuously cast bloom that goes out crystallizer bottom are connected to esr alternating source, exchange current can pass through consumable electrode, melting slag liquid and metal pool and the remelting continuously cast bloom solidifying form loop, when exchange current is flowed through metal pool and permanent magnet chunk produce steady modulated magnetic field interact, esr continuous casting alloy melt is subject to then and clockwise, time and change counterclockwise the lorentz's force of sense of rotation, thereby smash the dentrite tissue of freezing interface in metal pool, form forming core particle, expand equiax crystal volume fraction, reduce thermograde simultaneously further, tended towards stability in liquid cave, growth or axial growth condition in forming, thus can thinning solidification structure, also just can significantly reduce the radial and axial segregation of alloying element.
According to above inventive concept, the utility model adopts following technical proposals:
A kind of compound electroslag molten casting device that utilizes steady magnetic field to optimize metal solidification texture, be combined into by esr device and casting apparatus, comprise metal consumable electrode, cable, voltage regulation and frequency modulation AC power, crystallizer, crystallizer water jacket, secondary water-cooled nozzle and continuous casting ingot guide mechanism roller, melting slag liquid level is in crystallizer internal cavity, form melting slag bath, solidification of metal melt below melting slag bath in crystallizer forms continuously cast bloom, metal consumable electrode and continuously cast bloom are all connected respectively in voltage regulation and frequency modulation AC power by cable, the bottom of metal consumable electrode and melting slag bath are in contact with one another, make metal consumable electrode, melting slag bath, metal melt, molten metal core in continuously cast bloom, continuously cast bloom and voltage regulation and frequency modulation AC power are communicated with the loop that forms exchange current successively, crystallizer water jacket is directly cooling to crystallizer, crystallizer water jacket has water jacket water-in and water jacket water outlet, the water coolant of secondary water-cooled nozzle ejection carries out cooling to the continuously cast bloom surface of continuous casting two cooling zones, continuous casting ingot guide mechanism roller traction continuously cast bloom, the continuously cast bloom solidifying is pulled out from the bottom outlet of crystallizer, under draw stripping plate drawing velocity be 0-1000mm/min.Periphery in the inner tube of water mold arranges the magnet that can apply additional steady magnetic field, make, under the steady modulation magnetic line of force effect of the steady magnetic field that the region, liquid-solid freezing interface of whole molten metal and continuously cast bloom applies in outside, to make the steady modulation direction of magnetic line of force and the angle setting that is axially orthogonal of continuously cast bloom
,by voltage regulation and frequency modulation AC power, the metal melt in region, whole liquid-solid freezing interface is applied to exchange current simultaneously, in the time that the exchange current being passed into is flowed through the liquid metal of not resolidified region of whole continuously cast bloom, interact with additional steady magnetic field, make the liquid metal of the not resolidified region of whole continuously cast bloom be subject to stirring and the exciting effect of the lorentz's force of multi-direction alternation, impel in the liquid metal in forward position, liquid-solid freezing interface and form microcell flow field, when alloy molten bath is formed and clockwise, time and counterclockwise microcell circulation, thereby the liquid metal of the not resolidified region of stirring and the whole continuously cast bloom of exciting, smash the dentrite of the solidified front of the liquid metal of the not resolidified region of whole continuously cast bloom, thereby the solidified structure of refinement continuously cast bloom.
Above-mentioned magnet is permanent magnet, has the electro-magnet of multistage yoke or have multipole superconducting magnet.Be that magnetic field is multipole modulated magnetic field, this magnetic field is produced by permanent magnet, also can be produced by the electro-magnet with multistage yoke, also can produce by having multipole superconducting magnet, and the magnetic induction density of generation is 50-10000mT.
As the preferred technical scheme of the utility model, above-mentioned magnet at least 2 group permanent magnetic iron block ring groups form, between the permanent magnetic iron block ring group of adjacent sets, be equal angles layout, every group of permanent magnetic iron block ring group produces N extremely to the N utmost point or the extremely steady modulation magnetic line of force to the S utmost point of N, form additional steady magnetic field, the magnet axial of every group of permanent magnetic iron block ring group and continuously cast bloom are parallel to each other or mutually form angle between axially.
The magnet N utmost point and the S of the permanent magnetic iron block ring group of above-mentioned adjacent sets extremely preferably alternately arrange.
Above-mentioned magnet is preferably disposed on the outside of the electro-slag continuous casting inner tube of crystallizer, and be arranged at crystallizer water jacket in enclose or crystallizer water jacket among, crystallizer inside is produced to steady magnetic field.
Above-mentioned metal consumable electrode is single single-phase female electrode, the two-phase electrode of at least 2 or the three-phase electrode of at least 32, and mother alloy electrode diameter used is 10-3800mm.
As the another kind of preferred technical scheme of the utility model, the top of crystallizer arranges alloying element and adds entrance.
Also have a kind of preferred technical scheme as the utility model, the top of crystallizer arranges gas shield cover or vacuum (-tight) housing.
Also separately have a kind of preferred technical scheme as the utility model, cable is water-cooled cable.
The shape of cross section of the inner tube of above-mentioned crystallizer is circular, square, template, non-circle and non-side's profiled-cross-section.The inner tube of crystallizer can be the circle of diameter 20-4000mm, square or template.
The utility model compared with prior art, has following substantive distinguishing features and advantage:
1. the steady modulated magnetic field that adopts neodymium iron boron or electro-magnet, superconducting magnet to produce, can accessiblely pass through crystallizer inner wall tube or casting blank shell, does not have additional energy expenditure, if adopt permanent magnet, can realize zero energy consumption; This can significantly reduce power consumption for traditional alternating magnetic field;
2. multipole steady modulated magnetic field interacts with the exchange current of flow through female electrode, melt cinder pond and liquid metal bath, produce multidirectional alternation lorentz's force, make electro-slag continuous casting base liquid cave solid-liquid interface be subject to strong electromagnetic exciting, smash the dendrite in solid-liquid interface forward position, promote the Quench nucleus of crystallizer wall to come off simultaneously and form nucleus multiplication effect, improve nucleation rate, can refinement dendrite or improve equiaxed zone ratio; Because the lorentz's force producing is multiple directions, will form microcell and flow, thereby make the temperature in liquid slag bath and liquid metal bath more even, thereby reduce thermograde, for inner nucleation creates conditions, this will contribute to the formation of equiax crystal; In addition, the mobile equalizing temperature effect forming of this microcell, will make solid-liquid interface more straight, thereby be expected to obtain the dendrite or the columanar structure that are close to axial growth, more favourable to the deformation performance of raising ESR ingot;
3. this device, for the solidification Control process of large-scale ESR ingot, is expected to remarkable refinement dendrite interval, improves proportion of equiaxed grain, also will make composition more even simultaneously, reduces segregation; For Ledeburitic steel, be also expected to refinement carbide size, therefore very favourable to promoting its forgeability;
4. this device adopts electroslag remelting technique under stripping formula multi-level modulation magnetic field, therefore can prepare the ESR ingot of congruent axialite or the remarkable refinement dendrite of long size.
5. it is characterized in that not only can obtaining dendritic structure or the equiaxed grain structure of refinement, can also obtain the long size continuous casting ESR ingot of congruent axialite, can also obtain the electroslag ingot blank that crystallization direction is axial growth, also can, for the carbide in refinement steel or other microcosmic phase constitutions, greatly promote the deformation performance of electroslag ingot blank.
6. the alloy that apparatus of the present invention are used is thought the alloy of steel alloy, bearing steel, titanium alloy, copper alloy, superalloy and all applicable electroslag casting of various alloy designations.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment mono-compound electroslag molten casting device.
Fig. 2 is that the magnetic pole of the utility model embodiment mono-is arranged and continuously cast bloom liquid cave solid-liquid interface location microcell flow schematic diagram.
Fig. 3 is that the utility model embodiment mono-is that the state that Fig. 2 shows experiences the continuously cast bloom liquid cave solid-liquid interface location microcell flow schematic diagram after the semi-period.
Embodiment
Preferred embodiment accompanying drawings of the present utility model is as follows:
embodiment mono-:
Referring to Fig. 1 ~ Fig. 3, a kind of compound electroslag molten casting device that utilizes steady magnetic field to optimize metal solidification texture, be combined into by esr device and casting apparatus, comprise metal consumable electrode 1, cable 12, voltage regulation and frequency modulation AC power 4, crystallizer 2, crystallizer water jacket 11, secondary water-cooled nozzle 8 and continuous casting ingot guide mechanism roller 9, melting slag liquid level is in crystallizer 2 inner chambers, form melting slag bath 6, the corresponding slag system that the slag system adopting mates with electroslag melting steel grade, solidification of metal melt below melting slag bath 6 in crystallizer 2 forms continuously cast bloom 5, metal consumable electrode 1 and continuously cast bloom 5 are all connected respectively in voltage regulation and frequency modulation AC power 4 by cable 12, the bottom of metal consumable electrode 1 and melting slag bath 6 are in contact with one another, metal consumable electrode 1 is single single-phase female electrode, make metal consumable electrode 1, melting slag bath 6, metal melt, molten metal core in continuously cast bloom 5, continuously cast bloom 5 and voltage regulation and frequency modulation AC power 4 are communicated with the loop that forms exchange current successively, crystallizer water jacket 11 is directly cooling to crystallizer 2, crystallizer water jacket 11 has water jacket water-in 7 and water jacket water outlet 10, the water coolant that secondary water-cooled nozzle 8 is sprayed carries out cooling to continuously cast bloom 5 surfaces of continuous casting two cooling zones, continuous casting ingot guide mechanism roller 9 draws continuously cast bloom 5, the continuously cast bloom 5 solidifying is pulled out from the bottom outlet of crystallizer 2, periphery in the inner tube of water mold 2 arranges the magnet 3 that can apply additional steady magnetic field, make under steady modulation magnetic line of force 17 effects of the steady magnetic field that 14 regions, liquid-solid freezing interface of whole molten metal and continuously cast bloom 5 apply in outside, make 5 of the direction of steady modulation magnetic line of force 17 and the continuously cast bloom angle setting that is axially orthogonal
,by voltage regulation and frequency modulation AC power 4, the metal melt in 14 regions, whole liquid-solid freezing interface is applied to exchange current simultaneously, in the time that the exchange current being passed into is flowed through the liquid metal of not resolidified region of whole continuously cast bloom 5, interact with additional steady magnetic field, make the liquid metal of the not resolidified region of whole continuously cast bloom 5 be subject to stirring and the exciting effect of the lorentz's force 15 of multi-direction alternation, impel in the liquid metal in 14 forward positions, liquid-solid freezing interface and form microcell flow field 16, when alloy molten bath is formed and clockwise, time and counterclockwise microcell circulation, thereby the liquid metal of the not resolidified region of stirring and the whole continuously cast bloom 5 of exciting, smash the dentrite 13 of the solidified front of the liquid metal of the not resolidified region of whole continuously cast bloom 5, thereby the solidified structure of refinement continuously cast bloom 5.Magnet 3 is made up of 3 groups of permanent magnetic iron block ring groups, form the electromagnetic exciting device of low energy consumption high-efficiency, between the permanent magnetic iron block ring group of adjacent sets, be equal angles layout, every group of permanent magnetic iron block ring group produces the extremely steady modulation magnetic line of force 17 to the S utmost point of N, form additional steady magnetic field, parallel to each other between the magnet axial of every group of permanent magnetic iron block ring group and continuously cast bloom 5 are axial, the magnet N utmost point and the S utmost point of the permanent magnetic iron block ring group of adjacent sets are alternately arranged.Magnet 3 is arranged at the outside of the electro-slag continuous casting inner tube of crystallizer 2, and be arranged at crystallizer water jacket 11 in enclose, to the inner steady magnetic fields that produce of crystallizer 2, with obtain tiny column crystal or be tending towards isometry solidified structure, to reduce segregation.This compound electroslag molten casting device feature be arrange in the periphery of water cooled copper mould crystallizer multipair (n >=2 are mutually the modulation magnetic pole of isogonism, with the multidirectional vibration lorentz's force of the compound generation of alternating-current of electroslag melting with form microcell and flow, strengthen and the forming core of controlling ESR ingot with organize forming process.Can be used for the refining of steel alloy electro-slag continuous casting, significantly refinement ESR ingot solidified structure, even obtain congruent axialite ESR ingot, reduce the radial and axial segregation in electroslag ingot casting, improve the deformation performance of ESR ingot, compound continuous stripping process can be prepared long size, grain refining, composition long size electroslag ingot blank uniformly.
In the present embodiment, adopt the multipair isogonism magnetic pole that is mutually to arrange, in crystallizer water jacket 11 at electro-slag continuous casting with the crystallizer 2 of water cooled copper mould, utilize exchange current hybrid multiplex modulation magnetic field to produce electromagnetic exciting, go out with electro-slag continuous casting the electro-slag continuous casting base that solidified structure is tiny evenly, segregation is little, be tending towards isometry.Concrete operation step is as follows:
1. pre-melted slag is added in the crystallizer 2 of water-cooled;
2. the metal consumable electrode 1 for the treatment of refining is inserted in the solid-state pre-melted slag of crystallizer 2;
3. by the current output terminal that continuously cast bloom 5 use cables are connected respectively external source of drawing of metal consumable electrode 1 and crystallizer 2 bottoms;
4. adopt the permanent magnetic iron block ring group of quantity n >=2 group, be positioned over electro-slag continuous casting crystallizer 2 copper molds outsides and water jacket in enclose, for to crystallizer 2 inside generation steady modulated magnetic fields, being axially orthogonal of magnetic field and continuously cast bloom 5; The steady modulation magnetic line of force 17 that the permanent magnetic iron block ring group generation N utmost point and the S utmost point are alternately arranged; Permanent magnetic iron block ring group also can adopt the extremely configuration to the N utmost point of N; The magnet of every pair of permanent magnetic iron block ring group axially can be parallel, also can become the angle of 0-180 °
5. the relative position of adjusting magnetic field, electrode, electroslag ingot casting, is arranged in steady modulated magnetic field region with the liquid cave solid-liquid interface of guaranteeing electro-slag continuous casting base;
6. control electroslag melting electric current, after the heat of its generation dropwise melts steel alloy electrode bar, controlling magnetic field intensity, the vibration Lorentz force 15 of utilizing stationary magnetic field and exchange current interaction to produce, smash the dendrite at 14 places, liquid-solid freezing interface and impel crystallizer wall nucleus around to come off, form nucleus multiplication effect, the solidified structure of refinement electroslag strand, reduces segregation;
7. along with the fusing of metal consumable electrode 1 and the growth from lower to upper of electro-slag continuous casting base, rationally adjust in time the drop-down speed of drop-down towing mechanism, with the process of setting that guarantees solid-liquid interface all in steady modulated magnetic field region.
In the present embodiment, referring to Fig. 1, will treat that metal consumable electrode 1 and the continuously cast bloom 5 of getting ready access respectively in voltage regulation and frequency modulation AC power 4.By crystallizer 2, treat that the melting end of metal consumable electrode 1 is placed in steady modulated magnetic field, the magneticstrength that wherein steady modulated magnetic field produces is 1000mT, direction perpendicular to metal consumable electrode 1 axially.In the present embodiment, with 60%CaF
2, 20%CaO, 20%Al
2o
3as pre-melted slag composition, the diameter of metal consumable electrode 1 is 250mm, and length is 1500mm, and the diameter of bore of crystallizer 2 is 320mm.Metal consumable electrode 1 and continuously cast bloom 5 are together linked in voltage regulation and frequency modulation AC power 4, can be power frequency AC or voltage regulation and frequency modulation AC power, above-mentioned voltage regulation and frequency modulation AC power 4 can be replaced by direct supply, and its strength of current is 200-20000A, and frequency is 0.01-3000Hz.Regulating in advance the hydraulic pressure in crystallizer water jacket 11 is 200L/h, the melting slag having melted is poured in crystallizer 2, adjust lower metal consumable electrode 1 to make in its liquid slag charge that is immersed in melting slag bath 6, regulate the loop current in metal consumable electrode 1, melting slag bath 6, continuously cast bloom 5 to make it reach 3000A, frequency is 50Hz, exchange current produces a large amount of joule heatings while contact with melting slag bath 6 by metal consumable electrode 1, in the time that the interior temperature of melting slag bath 6 reaches metal consumable electrode 1 fusing point, the front end of metal consumable electrode 1 starts fusing.Molten metal drop, through melting slag bath 6, reaches continuously cast bloom 5 bottoms of having solidified and is solidified by crystallizer water jacket 11 and secondary water-cooled nozzle Final 8 water-cooled processed, regulates dummy ingot mechanism roller 9 stabilization of speed electro-slag continuous casting processes.Now three pairs are mutually 60
.permanent magnetic iron block ring group produce steady magnetic field, referring to Fig. 2, the center in magnetic field is aimed at all the time to liquid-solid freezing interface 14 parts of solidifying, magnetic line of force 17 is vertical with exchange current, and produces the lorentz's force 15 of alternation.When in the time of 1000mT, exchange current is flowed through continuously cast bloom 5, further act on additional magnetic line of force 17, form huge lorentz's force 15 at solidified front, impel forward position, freezing interface to form microcell flow field 16, when alloy molten bath is formed and clockwise, time and counterclockwise microcell circulation, stir alloy molten bath, smash the dentrite 13 in 14 forward positions, liquid-solid freezing interface in alloy melt, shake off the Quench nucleus at crystallizer 2 inwall places, form nucleus multiplication effect, microcell flow field 16 can also reduce the thermograde at 14 places, liquid-solid freezing interface, raw growth conditions in even forming, be conducive to obtain the solidified structure of large volume fraction or congruent axialite, make continuously cast bloom 5 structure refinements and homogenizing, component segregation degree will significantly reduce even elimination simultaneously.Along with the down traction of dummy ingot mechanism roller 9, can obtain the continuously cast bloom 5 of congruent axialite or the remarkable refinement of dendrite.
embodiment bis-:
The present embodiment and embodiment mono-are basic identical, and special feature is:
In the present embodiment, the top of crystallizer 2 arranges alloying element and adds entrance, work in coordination with mutually with the Homogenization Process that utilizes multi-level modulation magnetic field to carry out reinforced alloys element, effectively control the tissue of continuously cast bloom 5, and the alloying element of accurate adjustment metal composition, when reaching refinement homogenizing crystal grain, alloy composition carries out precise fine-adjustment.
embodiment tri-:
The present embodiment and previous embodiment are basic identical, and special feature is:
In the present embodiment; gas shield cover or vacuum (-tight) housing are set above crystallizer 2, prevent alloying element oxidation, prevent increasing of oxygen level in electroslag ingot casting; improve the quality of continuously cast bloom 5, and be convenient to pass into suitable atmosphere to melt out the ESR ingot with special composition.
embodiment tetra-:
The present embodiment and previous embodiment are basic identical, and special feature is:
In the present embodiment, cable 12 is water-cooled cable, can guarantee that cable normally works, and prevents that current circuit from opening circuit.
By reference to the accompanying drawings the utility model embodiment is illustrated above; but the utility model is not limited to above-described embodiment; the object that can also create according to utility model of the present utility model is made multiple variation; the change made under all spirit according to technical solutions of the utility model and principle, modification, substitute, combination, simplify; all should be equivalent substitute mode; utilize steady magnetic field to optimize structure and the building up principle of the compound electroslag molten casting device of metal solidification texture as long as meet for the utility model point, all belong to protection domain of the present utility model.
Claims (10)
1. a compound electroslag molten casting device that utilizes steady magnetic field to optimize metal solidification texture, be combined into by esr device and casting apparatus, comprise metal consumable electrode (1), cable (12), voltage regulation and frequency modulation AC power (4), crystallizer (2), crystallizer water jacket (11), secondary water-cooled nozzle (8) and continuous casting ingot guide mechanism roller (9), melting slag liquid level is in crystallizer (2) inner chamber, form melting slag bath (6), the solidification of metal melt of melting slag bath (6) below in crystallizer (2) forms continuously cast bloom (5), metal consumable electrode (1) and continuously cast bloom (5) are all connected respectively in described voltage regulation and frequency modulation AC power (4) by described cable (12), the bottom of described metal consumable electrode (1) and melting slag bath (6) are in contact with one another, make metal consumable electrode (1), melting slag bath (6), metal melt, molten metal core in continuously cast bloom (5), continuously cast bloom (5) and described voltage regulation and frequency modulation AC power (4) are communicated with the loop that forms exchange current successively, described crystallizer water jacket (11) is directly cooling to crystallizer (2), described crystallizer water jacket (11) has water jacket water-in (7) and water jacket water outlet (10), continuously cast bloom (5) surface of the water coolant that described secondary water-cooled nozzle (8) is sprayed to continuous casting two cooling zones carried out cooling, continuous casting ingot guide mechanism roller (9) traction continuously cast bloom (5), the continuously cast bloom (5) solidifying is pulled out from the bottom outlet of described crystallizer (2), it is characterized in that: the periphery in the inner tube of described water mold (2) arranges the magnet (3) that can apply additional steady magnetic field, make under steady modulation magnetic line of force (17) effect of the steady magnetic field that the region, liquid-solid freezing interface (14) of whole molten metal and continuously cast bloom (5) applies in outside, make the direction of steady modulation magnetic line of force (17) and (5) of the continuously cast bloom angle setting that is axially orthogonal
,by described voltage regulation and frequency modulation AC power (4), the metal melt in region, whole liquid-solid freezing interface (14) is applied to exchange current simultaneously, in the time that the exchange current being passed into is flowed through the liquid metal of not resolidified region of whole continuously cast bloom (5), interact with additional steady magnetic field, make the liquid metal of the not resolidified region of whole continuously cast bloom (5) be subject to stirring and the exciting effect of the lorentz's force (15) of multi-direction alternation, impel in the liquid metal in forward position, liquid-solid freezing interface (14) and form microcell flow field (16), when alloy molten bath is formed and clockwise, time and counterclockwise microcell circulation, thereby the liquid metal of the not resolidified region of stirring and the whole continuously cast bloom of exciting (5), smash the dentrite (13) of the solidified front of the liquid metal of the not resolidified region of whole continuously cast bloom (5), thereby the solidified structure of refinement continuously cast bloom (5).
2. the compound electroslag molten casting device that utilizes steady magnetic field to optimize metal solidification texture according to claim 1, is characterized in that: described magnet (3) is permanent magnet, has the electro-magnet of multistage yoke or have multipole superconducting magnet.
3. the compound electroslag molten casting device that utilizes steady magnetic field to optimize metal solidification texture according to claim 2, it is characterized in that: described magnet (3) at least 2 group permanent magnetic iron block ring groups form, between the permanent magnetic iron block ring group of adjacent sets, be equal angles layout, every group of permanent magnetic iron block ring group produces N extremely to the N utmost point or the extremely steady modulation magnetic line of force (17) to the S utmost point of N, form additional steady magnetic field, the magnet axial of every group of permanent magnetic iron block ring group and continuously cast bloom (5) are parallel to each other or mutually form angle between axially.
4. the compound electroslag molten casting device that utilizes steady magnetic field to optimize metal solidification texture according to claim 3, is characterized in that: magnet (3) the N utmost point and the S utmost point of the permanent magnetic iron block ring group of adjacent sets are alternately arranged.
5. optimize the compound electroslag molten casting device of metal solidification texture according to the steady magnetic field that utilizes described in any one in claim 1～4, it is characterized in that: described magnet (3) is arranged at the outside of the inner tube of described crystallizer for electro-slag continuous casting (2), and be arranged at described crystallizer water jacket (11) in enclose or described crystallizer water jacket (11) among, to the inner steady magnetic field that produces of described crystallizer (2).
6. optimize the compound electroslag molten casting device of metal solidification texture according to the steady magnetic field that utilizes described in any one in claim 1～4, it is characterized in that: described metal consumable electrode (1) is single single-phase female electrode, the two-phase electrode of at least 2 or the three-phase electrode of at least 2.
7. optimize the compound electroslag molten casting device of metal solidification texture according to the steady magnetic field that utilizes described in any one in claim 1～4, it is characterized in that: the top of described crystallizer (2) arranges alloying element and adds entrance.
8. optimize the compound electroslag molten casting device of metal solidification texture according to the steady magnetic field that utilizes described in any one in claim 1～4, it is characterized in that: the top of described crystallizer (2) arranges gas shield cover or vacuum (-tight) housing.
9. optimize the compound electroslag molten casting device of metal solidification texture according to the steady magnetic field that utilizes described in any one in claim 1～4, it is characterized in that: described cable (12) is water-cooled cable.
10. optimize the compound electroslag molten casting device of metal solidification texture according to the steady magnetic field that utilizes described in any one in claim 1～4, it is characterized in that: the shape of cross section of the inner tube of described crystallizer (2) is circular, square, template, non-circle and non-side's profiled-cross-section.
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| CN201320838387.9U CN203639530U (en) | 2013-01-11 | 2013-12-19 | Composite electroslag casting device for optimizing metal solidification structure by using steady-state magnetic field |
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| CN201320013475 | 2013-01-11 | ||
| CN201320013475.5 | 2013-01-11 | ||
| CN201320838387.9U CN203639530U (en) | 2013-01-11 | 2013-12-19 | Composite electroslag casting device for optimizing metal solidification structure by using steady-state magnetic field |
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| CN104388689A (en) * | 2014-11-28 | 2015-03-04 | 中国科学院金属研究所 | Method and device for casting electromagnetic compound control electroslag remelting fine grains |
| CN104785739A (en) * | 2015-04-21 | 2015-07-22 | 上海大学 | Method and device for grain refinement in secondary cooling area in continuous casting process under steady-state magnetic field condition |
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| WO2016011759A1 (en) * | 2014-07-21 | 2016-01-28 | 中国科学院金属研究所 | Forging method for ultra-high temperature soft core of steel ingot |
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- 2013-12-19 CN CN201320838387.9U patent/CN203639530U/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2016011759A1 (en) * | 2014-07-21 | 2016-01-28 | 中国科学院金属研究所 | Forging method for ultra-high temperature soft core of steel ingot |
| CN104388689A (en) * | 2014-11-28 | 2015-03-04 | 中国科学院金属研究所 | Method and device for casting electromagnetic compound control electroslag remelting fine grains |
| CN104827007A (en) * | 2015-04-16 | 2015-08-12 | 上海大学 | Large-scale uniform-structure alloy ingot continuous casting preparation method and magnetic control electroslag continuous casting device |
| CN104785739A (en) * | 2015-04-21 | 2015-07-22 | 上海大学 | Method and device for grain refinement in secondary cooling area in continuous casting process under steady-state magnetic field condition |
| CN109909464A (en) * | 2019-04-11 | 2019-06-21 | 东北大学 | A kind of saturating magnetic high thermal conductivity crystallizer inner sleeve of height with skeleton structure |
| CN110499426A (en) * | 2019-08-16 | 2019-11-26 | 河钢股份有限公司 | A kind of device and method of the high-end bearing steel of Electromagnetic Control electroslag refining |
| CN113061741A (en) * | 2021-03-18 | 2021-07-02 | 东北大学 | Electroslag remelting composite device and method for improving temperature distribution of slag bath by external magnetic field |
| CN113061741B (en) * | 2021-03-18 | 2022-05-03 | 东北大学 | Electroslag remelting composite device and method for improving temperature distribution of slag bath by external magnetic field |
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