CN104308109A - Electromagnetic oscillation horizontal continuous casting method and device of copper alloy plates and strips - Google Patents
Electromagnetic oscillation horizontal continuous casting method and device of copper alloy plates and strips Download PDFInfo
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- CN104308109A CN104308109A CN201410632151.9A CN201410632151A CN104308109A CN 104308109 A CN104308109 A CN 104308109A CN 201410632151 A CN201410632151 A CN 201410632151A CN 104308109 A CN104308109 A CN 104308109A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/14—Plants for continuous casting
- B22D11/142—Plants for continuous casting for curved casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—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
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Abstract
The invention relates to the technical field of metal processing and provides an electromagnetic oscillation horizontal continuous casting method and device of copper alloy plates and strips. The electromagnetic oscillation horizontal continuous casting device comprises a holding furnace, a crystallizer base plate, a pulse electromagnetic oscillation generator, a stainless steel water cooled jacket, a cooled copper bush and a graphite crystallizer. The electromagnetic oscillation horizontal continuous casting device is characterized in that the holding furnace is connected with the graphite crystallizer, and the annular pulse electromagnetic oscillation generator is sleeved at one end of the graphite crystallizer close to the holding furnace. The surface of the pulse electromagnetic oscillation generator not contacting the holding furnace and the graphite crystallizer is wrapped by the crystallizer base plate and is fixed on the holding furnace through the crystallizer base plate. The cooled copper bush and the stainless steel water cooled jacket are sleeved on one portion of the graphite crystallizer not wrapped by the crystallizer base plate and the pulse electromagnetic oscillation generator from inside to outside in sequence. The electromagnetic oscillation horizontal continuous casting method and device can reduce casting flaws of copper alloy plates of segregation and cracks, refine alloy structures and improve the yield of copper alloy and strip blanks.
Description
Technical field
The present invention relates to metal working technical area, particularly relate to a kind of copper alloy plate strip impulse electromagnetic oscillation horizontal continuous-casting method and device.
Background technology
At present, Copper and its alloy has become second largest non-ferrous metal, is the basic material of widespread demand in global economy every profession and trade.Copper and its alloy Strip accounts for about 35% of world's Copper fabrication material total amount.Over nearly 10 years, World Economics is flourish, is particularly the national economy high speed development of the new developing country of representative with China, has driven Copper and its alloy Strip demand and the rapid of output to rise.In modern industrial technology, the demand of high-precision Copper and its alloy Strip is constantly increased especially, as high-quality electric connector copper alloy band (interconnecting devices band), circuit lead frame band, transformer belt, radiator band, high-grade calendered flexible Copper Foil etc.The Copper and its alloy Strip billet of preparation high-quality is the precondition obtaining high-precision Copper and its alloy Strip product.
But the copper alloy plate strip that current horizontal caster is produced exists organizes thick, surface to there is the casting flaws such as crackle, shrinkage porosite, segregation and inverse segregation.Such as, the alloys such as one-ton brass, aluminium bronze, tin-phosphor bronze, when content of solute is higher, solidified structure is thick, solute element segregation is relatively more serious, and very easily form crackle in casting process, strip product percent defective is higher.Therefore for the deficiency that strip horizontal continuous-casting technology exists, improving in copper alloy plate strip billet quality, many people do a lot of work in improvement for equipments and process.
Patent 200510047193.7, by installing travelling-magnetic-field in the upper and lower both sides of graphite crystallizer, produces action of forced stirring in melt, obtains the copper alloy plate strip of even tissue, grain refinement, flawless, segregation-free.
Patent 200810155756.8 is by installing magnetic field device at crystallizer position, between the two side of graphite crystallizer cross side, laterally apply electric current simultaneously, throwing direction produces and forces stirring, thus contribute to forming equiax crystal, suppress segregation and inverse segregation, obtain the bronze slab of better quality.
Patent 200910182373.4, by holding furnace side, arranges linear magnetic field generator above crystallizer, its vertical magnetic field throwing direction produced.Melt in magnetic fields crystallizer, refinement strand microstructure, reduces melt air content, improves strand density, alloying element is uniformly distributed.
Pulsed magnetic field is the Novel magnetic field device grown up recent years, can in metal bath, produce the multiple action such as electromagnetic agitation and electromagnetic viscosimeter, has to export that peak value is high, machine utilization is little, low power consumption and other advantages.Can remarkable thinning metal solidification texture, improve its mechanical property.
Patent 201110236278.5 is by arranging pulsed magnetic field magnet exciting coil in vertical Semi-continuous casting crystallizer inside, thus produce forced convertion in magnesium alloy fused mass in crystallizer, smash thick dendrite, increase nucleation rate, thus obtain the magnesium alloy rod of grain refinement.But this pulsed magnetic field only achieves good effect having in low-density magnesium alloy, aluminium alloy refinement, for the copper alloy of high density and viscosity, then need stronger pulsed magnetic field.At present, the not yet application of associated pulsation electromagnetic viscosimeter technology in the copper alloy plate strip horizontal continuous-casting of big flakiness ratio.
Summary of the invention
Thick, that surface exists the casting flaws such as crackle, shrinkage porosite, segregation and inverse segregation problem is organized in the copper alloy plate strip existence of producing for horizontal continuous casting equipment of the prior art and method, the present invention proposes a kind of method and device of copper alloy plate strip impulse electromagnetic oscillation horizontal continuous-casting, the solidified structure of copper alloy plate strip can be improved, and the casting flaw such as segregation and crackle can be reduced, thus improve the yield rate of copper alloy plate made-up belt.
The invention provides a kind of copper alloy plate strip impulse electromagnetic oscillation horizontally continuously casting device, described device comprises:
Holding furnace, crystallizer base plate, impulse electromagnetic oscillation generator, stainless steel water collar, cooling copper sheathing and graphite crystallizer, described holding furnace is communicated with described graphite crystallizer, described impulse electromagnetic oscillation generator is annular, and is set in the one end near described holding furnace on described graphite crystallizer; The face that described impulse electromagnetic oscillation generator does not contact with described graphite crystallizer with described holding furnace is coated by described crystallizer base plate institute, and is fixed on described holding furnace by described crystallizer base plate; Described graphite crystallizer is not by described crystallizer base plate and the coated part of described impulse electromagnetic oscillation generator sheathed described cooling copper sheathing and described stainless steel water collar successively from inside to outside.
Further, the gap-fill between described impulse electromagnetic oscillation generator and described graphite crystallizer, described holding furnace, described crystallizer base plate has refractory cement.
Further, the angle of the magnet exciting coil of described impulse electromagnetic oscillation generator is central angle is 180 to 270 circular arcs of spending.
Further, the magnet exciting coil of described impulse electromagnetic oscillation generator is that the enamel covered wire being 1 to 2mm by diameter is entwined.
Accordingly, present invention also offers a kind of copper alloy plate strip impulse electromagnetic oscillation horizontal continuous-casting method, described method comprises:
When in the holding furnace of copper alloy plate strip impulse electromagnetic oscillation horizontally continuously casting device, copper alloy liquid temperature reaches 1000 to 1200 DEG C, start hauling machine, drive the motion of copper alloy plate made-up belt, starting impulse electromagnetic viscosimeter generator simultaneously, described impulse electromagnetic oscillation generator produces electromagnetic force to the copper alloy liquid in graphite crystallizer, and then carries out electromagnetic viscosimeter to the radial direction of the copper alloy liquid in graphite crystallizer.
Further, described impulse electromagnetic oscillation generator is connected on the adjustable pulse power of charging voltage, and the adjustable range of voltage is 100 to 800V.
Further, the integral multiple of the pulse width that described impulse electromagnetic oscillation generator passes into pulse current for 1ms in casting process regulates continuously, and pulse frequency is that the integral multiple of 1Hz regulates continuously.
Further, pulse width modulation scope is 1 to 10ms, and pulse frequency adjustable range is 50 to 150Hz.
The method of a kind of copper alloy plate strip impulse electromagnetic oscillation horizontal continuous-casting provided by the invention and device, utilize the coated impulse electromagnetic oscillation generator of crystallizer base plate, and by described crystallizer base plate, impulse electromagnetic oscillation generator is fixed on described holding furnace, the extruding of crystallizer base plate paired pulses electromagnetic viscosimeter generator can be reduced, extend its service life, select the impulse electromagnetic oscillation generator of annular, and utilize pulse signal to act on copper alloy liquid in graphite crystallizer as electromagnetic vibration signal, the magnetic field force produced can cause intense oscillations and forced convection in the copper alloy liquid in graphite crystallizer, a large amount of nucleus that graphite crystallization wall is first formed can not only be washed away and bring in the copper alloy liquid in graphite crystallizer, thus increase nucleation rate, and make the temperature field in strip edge and centre be tending towards even.And the angle of the magnet exciting coil of described impulse electromagnetic oscillation generator is arranged to the circular arc that central angle is 180 to 270, comparatively uniform Distribution of Magnetic Field can be obtained.Pulsed magnetic generator energy consumption provided by the invention is low, equipment is simple, easy to operate, safe and reliable, impulse electromagnetic oscillation technology is applied in the copper alloy plate strip horizontal continuous-casting compared with big flakiness ratio, the solidified structure of copper alloy plate strip can not only be improved, and the casting flaw such as segregation and crackle can be reduced, refining alloy tissue, thus improve the yield rate of copper alloy plate made-up belt.By method provided by the invention can prepare solidified structure evenly, grain refinement, flawless and the copper alloy plate strip strand without solute element segregation, be applicable to the copper alloy plate strip casting field of big flakiness ratio.
Accompanying drawing explanation
The structural representation of the copper alloy plate strip impulse electromagnetic oscillation horizontally continuously casting device that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 is the sectional view of A-A line in Fig. 1;
Fig. 3 is the front view of impulse electromagnetic oscillation generator;
Fig. 4 is the top view of impulse electromagnetic oscillation generator;
Fig. 5 is the distribution schematic diagram that under different frequency, impulse electromagnetic oscillation generator does not design the melt internal magnetic field of convex comer;
The realization flow figure of the copper alloy plate strip impulse electromagnetic oscillation horizontal continuous-casting method that Fig. 6 provides for the embodiment of the present invention;
The technical characteristic that Reference numeral in figure refers to is:
1, holding furnace; 2, crystallizer base plate; 3, impulse electromagnetic oscillation generator; 4, stainless steel water collar; 5, copper sheathing is cooled; 6, graphite crystallizer; 7, copper alloy plate; 8, impulse electromagnetic oscillation generator water inlet; 9, impulse electromagnetic oscillation generator delivery port.
Detailed description of the invention
Clearly, below in conjunction with drawings and Examples, the present invention is described in further detail for the technical problem solved for making the present invention, the technical scheme of employing and the technique effect that reaches.Be understandable that, specific embodiment described herein is only for explaining the present invention, but not limitation of the invention.It also should be noted that, for convenience of description, illustrate only part related to the present invention in accompanying drawing but not full content.
Embodiment one
The structural representation of the copper alloy plate strip impulse electromagnetic oscillation horizontally continuously casting device that Fig. 1 provides for the embodiment of the present invention.As shown in Figure 1, the copper alloy plate strip impulse electromagnetic oscillation horizontally continuously casting device that the embodiment of the present invention provides comprises: holding furnace 1, crystallizer base plate 2, impulse electromagnetic oscillation generator 3, stainless steel water collar 4, cooling copper sheathing 5 and graphite crystallizer 6, wherein, described holding furnace 1 is communicated with described graphite crystallizer 6, described impulse electromagnetic oscillation generator 3 is annular, and is set in the one end near described holding furnace 1 on described graphite crystallizer 6; The face that described impulse electromagnetic oscillation generator 3 does not contact with described graphite crystallizer 6 with described holding furnace 1 is coated by described crystallizer base plate 2 institute, and is fixed on described holding furnace 1 by described crystallizer base plate 2; Described graphite crystallizer 6 is not by described crystallizer base plate 2 and the coated part of described impulse electromagnetic oscillation generator 3 sheathed described cooling copper sheathing 5 and described stainless steel water collar 4 successively from inside to outside.
Wherein, impulse electromagnetic oscillation technology is applied in the copper alloy plate strip horizontal continuous-casting compared with big flakiness ratio by the present invention first.Such as, be 8mm to thickness, width is the casting of the brass (H70) of 450mm, is 12mm to thickness, and width is the casting of the tin-phosphor bronze (QSn6.5-0.1) of 600mm.The face do not contacted with described graphite crystallizer 6 with described holding furnace 1 by described impulse electromagnetic oscillation generator 3 is coated by described crystallizer base plate 2 institute, and be fixed on described holding furnace 1 by crystallizer base plate 2, the extruding of crystallizer base plate 2 paired pulses electromagnetic viscosimeter generator 3 can be reduced, extend its service life.Such as, by impulse electromagnetic oscillation generator 3 is arranged in the groove of crystallizer base plate 2, and then by crystallizer base plate 2, impulse electromagnetic oscillation generator 3 is being fixed on described holding furnace 1.In addition, gap-fill between impulse electromagnetic oscillation generator 3 and graphite crystallizer 6, holding furnace 1, crystallizer base plate 2 has refractory cement, gap-fill has refractory cement that impulse electromagnetic oscillation generator can be made to locate fully, can alleviate the extruding of crystallizer floor paired pulses impulse generator well simultaneously.
Fig. 2 is the sectional view of A-A line in Fig. 1.Fig. 3 is the front view of impulse electromagnetic oscillation generator.Fig. 4 is the top view of impulse electromagnetic oscillation generator.Can find out that impulse electromagnetic oscillation generator provided by the invention 3 is for annular from Fig. 3 and Fig. 4, the annular of impulse electromagnetic oscillation generator 3, " ring " be around the meaning, being the annular matched with described graphite crystallizer 6, also can be the ring of rectangle.In addition, the present invention to be pulse signal by the signal behavior of electromagnetic viscosimeter generator 3 be due to: not only save the energy, pulse current can reach maximum in the shorter time simultaneously, and namely impulse electromagnetic oscillation generator can produce larger magnetic field in the shorter time.Make impulse electromagnetic oscillation generator magnet exciting coil used copper section used long-pending less like this, therefore with travelling-magnetic-field in contrast, impulse electromagnetic oscillation generator apparatus is simple, small volume, is more suitable for the use of actual production.Impulse electromagnetic oscillation generator produces pulsed magnetic field, act on the copper alloy liquid in graphite crystallizer, intense oscillations and forced convection is caused in the copper alloy liquid of the magnetic field force produced in graphite crystallizer, a large amount of nucleus that graphite crystallization wall is first formed can not only be washed away and bring copper alloy liquid into, and then increase nucleation rate, and the temperature field in strip edge and centre is made to be tending towards even.
In such scheme, the angle of the magnet exciting coil of described impulse electromagnetic oscillation generator 3 to be central angles be 180 to 270 circular arc.The circular arc at the angle of the magnet exciting coil of impulse electromagnetic oscillation generator 3 to be central angles be obtuse angle as can be seen from Figure 2, to obtain comparatively uniform Distribution of Magnetic Field.Wherein, the angle of magnet exciting coil is designed to central angle to be the circular arc at obtuse angle be due to: according to the field function and the Biot-Sha Wa-Lapalce's law that characterize magnetic signature, rectangle magnetic field has sharp angle effect, and namely magnetic field is always maximum at sharp corner.In order to verify sharp angle effect, therefore to the magnetic field ANSYS Software Numerical Simulation that the impulse electromagnetic oscillation generator of annular produces, find out from analog result, magnetic field is maximum at edge.In order to obtain comparatively uniform Distribution of Magnetic Field, paired pulses electromagnetic viscosimeter generator has made corresponding amendment, namely the edge of the impulse electromagnetic oscillation generator of annular is designed to the circular arc that central angle is obtuse angle, the corner of ingot casting is made to increase from the distance of the edge of impulse electromagnetic oscillation generator like this, thus weaken the magnetic field intensity of edge, and then the copper alloy plate 7 obtained made is with that place, corner is magnetic field force induced is tending towards even, thus the uneven copper alloy plate strip bight of causing because of magnetic field force distribution can be well avoided to occur the casting flaws such as face crack.Wherein, the enamel covered wire that the magnet exciting coil of described impulse electromagnetic oscillation generator 3 can be 1 to 2mm by diameter is entwined.
Fig. 5 is the distribution schematic diagram that under different frequency, impulse electromagnetic oscillation generator does not design the melt internal magnetic field of convex comer.When not being designed to convex comer from the edges and corners that Fig. 5 can symbolize magnet exciting coil, magnetic field is comparatively large in edge distribution, the circular shape the at therefore magnet exciting coil of impulse electromagnetic oscillation generator of the present invention has been designed to angle to be central angle be obtuse angle.
In such scheme, preferably, the magnet exciting coil of described pulsed magnetic generator is that the enamel covered wire being 1 to 2mm by diameter is entwined.Optionally, impulse electromagnetic oscillation generator outside is closed by stainless steel, inner logical cooling water.As can be known from Fig. 4 when impulse electromagnetic oscillation generator works, intake from impulse electromagnetic oscillation generator water inlet 8, from the water outlet of impulse electromagnetic oscillation generator delivery port 9.Outside selects wall thickness to be that the stainless steel that 1 to 3mm is thick can reduce the shielding of generator shell to magnetic field, and simultaneously inner cooling water can be good at cooling magnet exciting coil, makes impulse electromagnetic oscillation generator can the operation of safety.
Copper alloy plate strip impulse electromagnetic oscillation horizontally continuously casting device provided by the invention, utilize the coated impulse electromagnetic oscillation generator of crystallizer base plate, and by described crystallizer base plate, impulse electromagnetic oscillation generator is fixed on described holding furnace, the extruding of crystallizer base plate paired pulses electromagnetic viscosimeter generator can be reduced, extend its service life, select the impulse electromagnetic oscillation generator of annular, and utilize pulse signal to act on copper alloy liquid in graphite crystallizer as electromagnetic vibration signal, the magnetic field force produced can cause intense oscillations and forced convection in the copper alloy liquid in graphite crystallizer, a large amount of nucleus that graphite crystallization wall is first formed can not only be washed away and bring in the copper alloy liquid in graphite crystallizer, thus increase nucleation rate, and make the temperature field in strip edge and centre be tending towards even.Pulsed magnetic generator energy consumption provided by the invention is low, equipment is simple, easy to operate, safe and reliable, impulse electromagnetic oscillation technology is applied in the copper alloy plate strip horizontal continuous-casting compared with big flakiness ratio, the solidified structure of copper alloy plate strip can not only be improved, and the casting flaw such as segregation and crackle can be reduced, thus improve the yield rate of copper alloy plate made-up belt.
Embodiment two
The copper alloy plate strip impulse electromagnetic oscillation horizontally continuously casting device that the present embodiment can adopt embodiment one to provide.
The realization flow figure of the copper alloy plate strip impulse electromagnetic oscillation horizontal continuous-casting method that Fig. 6 provides for the embodiment of the present invention.As shown in Figure 6, the copper alloy plate strip impulse electromagnetic oscillation horizontal continuous-casting method that the embodiment of the present invention provides comprises:
When in the holding furnace of copper alloy plate strip impulse electromagnetic oscillation horizontally continuously casting device, copper alloy liquid temperature reaches 1000 to 1200 DEG C, start hauling machine, drive the motion of copper alloy plate made-up belt, start the impulse electromagnetic oscillation generator of annular simultaneously, described impulse electromagnetic oscillation generator produces electromagnetic force to the copper alloy liquid in graphite crystallizer, and then carries out electromagnetic viscosimeter to the radial direction of the copper alloy liquid in graphite crystallizer.
In such scheme, preferably, the impulse electromagnetic oscillation generator of described annular is connected on the adjustable pulse power of charging voltage, and the adjustable range of voltage is 100 to 800V.
In such scheme, preferably, the integral multiple of pulse width for 1ms in casting process that the impulse electromagnetic oscillation generator of described annular passes into pulse current regulates continuously, and pulse frequency is that the integral multiple of 1Hz regulates continuously.Pulse width modulation scope is 1 to 10ms, and pulse frequency adjustable range is 50 to 150Hz.
In casting process, the electromagnetic force that impulse electromagnetic oscillation generator produces causes intense oscillations in a liquid, and magnetic induction intensity can reach 100 to 10000Gs.
The present invention is in the casting process of copper alloy plate strip, impulse electromagnetic oscillation generator can cause intense oscillations and forced convection in the melt to the magnetic field force that the copper alloy liquid in graphite crystallizer produces, a large amount of nucleus that graphite crystallization wall is first formed can be washed away and bring melt into, thus increase nucleation rate.
By way of example the copper alloy plate strip impulse electromagnetic oscillation horizontal continuous-casting method that the embodiment of the present invention provides is described below:
Such as, be 8mm to thickness, width is the casting of the brass (H70) of 450mm: be enclosed within graphite crystallizer by the impulse electromagnetic oscillation generator of annular, is fixed between holding furnace and crystallizer base plate, and binding post and charging voltage are that the pulse power of 100 ~ 800V is connected.When the brass copper liquid H70 in holding furnace reaches 1070 ~ 1100 DEG C, start hauling machine, start continuous casting.Power-on switch simultaneously, regulating impulse power supply, make that the pulse width of the pulse current passing into impulse electromagnetic oscillation generator is 1ms, frequency is 120Hz, when melt is by the magnetic field of running through graphite crystallizer, be subject to the effect of Lorentz force, Lorentz force makes the melt in graphite crystallizer produce intense oscillations.By the surface appearance of access panel made-up belt, adjustment passes into the pulse voltage of pulsed magnetic generator, until surface color be greyish white alternate, to solidify trace straight, keep this stable state, produce.Further, utilize plate shearing machine to intercept strip sample, observe its solidified structure and macro morphology, strip blank does not find crackle, composition analysis result shows Zn-ef ficiency segregation-free in cast sturcture.
Or such as, be 12mm to thickness, width is the casting of the tin-phosphor bronze (QSn6.5-0.1) of 600mm: be enclosed within graphite crystallizer by the pulsed magnetic generator of annular, be fixed between holding furnace and crystallizer base plate, binding post and charging voltage are that the pulse power of 100 ~ 800V is connected.When the tin-phosphor bronze liquid QSn6.5-0.1 in holding furnace reaches 1140 ~ 1170 DEG C, start hauling machine, start continuous casting.Power-on switch simultaneously, regulating impulse power parameter.Make that the pulse current width passing into impulse electromagnetic oscillation field generator is 5ms, frequency is 140Hz, when melt is by the magnetic field of running through graphite crystallizer, be subject to the effect of Lorentz force, Lorentz force makes the melt in graphite crystallizer produce intense oscillations.By the color on the surface of access panel made-up belt with solidify trace, adjustment passes into the pulse voltage of pulsed magnetic generator, until surface color be greyish white alternate, to solidify trace straight, keep this stable state, produce.Further, utilize plate shearing machine to intercept strip sample, observe its solidified structure, test its mechanical property.As-cast specimen yield strength reduces to 180 ~ 200MPa, percentage elongation 50 ~ 55%, and time of homogenized annealing reduced to less than 4 hours by original 8 ~ 12 hours, and casting temperature reduces by 30 DEG C.
Copper alloy plate strip impulse electromagnetic oscillation horizontal continuous-casting method provided by the invention, compared with the method cast continuously with existing travelling-magnetic-field subsidiary level, in the casting process of copper alloy plate strip, pulse signal is utilized to act on copper alloy melt in graphite crystallizer as electromagnetic vibration signal, the magnetic field force produced can cause intense oscillations and forced convection in the melt, a large amount of nucleus that graphite crystallization wall is first formed can not only be washed away and bring melt into, thus increase nucleation rate, and the temperature field in strip edge and centre is made to be tending towards even.By said method can prepare solidified structure evenly, grain refinement, flawless and the copper alloy plate strip strand without solute element segregation, be applicable to the copper alloy plate strip casting field of big flakiness ratio.Impulse electromagnetic oscillation technology is applied in the copper alloy plate strip horizontal continuous-casting compared with big flakiness ratio by copper alloy plate strip impulse electromagnetic oscillation horizontal continuous-casting method provided by the invention, the solidified structure of copper alloy plate strip can not only be improved, and the casting flaw such as segregation and crackle can be reduced, refining alloy tissue, thus the yield rate improving copper alloy plate made-up belt.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it is modified to the technical scheme described in foregoing embodiments, or equivalent replacement is carried out to wherein some or all of technical characteristic, does not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (8)
1. a copper alloy plate strip impulse electromagnetic oscillation horizontally continuously casting device, comprise holding furnace (1), crystallizer base plate (2), impulse electromagnetic oscillation generator (3), stainless steel water collar (4), cooling copper sheathing (5) and graphite crystallizer (6), it is characterized in that, described holding furnace (1) is communicated with described graphite crystallizer (6), described impulse electromagnetic oscillation generator (3) is annular, and is set in the upper one end near described holding furnace (1) of described graphite crystallizer (6); The face that described impulse electromagnetic oscillation generator (3) does not contact with described graphite crystallizer (6) with described holding furnace (1) is coated by described crystallizer base plate (2) institute, and is fixed on described holding furnace (1) by described crystallizer base plate (2); Described graphite crystallizer (6) is not by described crystallizer base plate (2) and the coated part of described impulse electromagnetic oscillation generator (3) sheathed described cooling copper sheathing (5) and described stainless steel water collar (4) successively from inside to outside.
2. copper alloy plate strip impulse electromagnetic oscillation horizontally continuously casting device according to claim 1, it is characterized in that, the gap-fill between described impulse electromagnetic oscillation generator (3) and described graphite crystallizer (6), described holding furnace (1), described crystallizer base plate (2) has refractory cement.
3. copper alloy plate strip impulse electromagnetic oscillation horizontally continuously casting device according to claim 1, is characterized in that, the angle of the magnet exciting coil of described impulse electromagnetic oscillation generator (3) is central angle is 180 to 270 circular arcs of spending.
4. the copper alloy plate strip impulse electromagnetic oscillation horizontally continuously casting device according to any one of claim 1-3, is characterized in that, the magnet exciting coil of described impulse electromagnetic oscillation generator (3) is that the enamel covered wire being 1 to 2mm by diameter is entwined.
5. a copper alloy plate strip impulse electromagnetic oscillation horizontal continuous-casting method, it is characterized in that, when in the holding furnace of copper alloy plate strip impulse electromagnetic oscillation horizontally continuously casting device, copper alloy liquid temperature reaches 1000 to 1200 DEG C, start hauling machine, drive the motion of copper alloy plate made-up belt, starting impulse electromagnetic viscosimeter generator simultaneously, described impulse electromagnetic oscillation generator produces electromagnetic force to the copper alloy liquid in graphite crystallizer, and then carries out electromagnetic viscosimeter to the radial direction of the copper alloy liquid in graphite crystallizer.
6. copper alloy plate strip impulse electromagnetic oscillation horizontal continuous-casting method according to claim 5, is characterized in that, described impulse electromagnetic oscillation generator is connected on the adjustable pulse power of charging voltage, and the adjustable range of voltage is 100 to 800V.
7. the copper alloy plate strip impulse electromagnetic oscillation horizontal continuous-casting method according to claim 5 or 6, it is characterized in that, the integral multiple of the pulse width that described impulse electromagnetic oscillation generator passes into pulse current for 1ms in casting process regulates continuously, and pulse frequency is that the integral multiple of 1Hz regulates continuously.
8. copper alloy plate strip impulse electromagnetic oscillation horizontal continuous-casting method according to claim 7, is characterized in that, pulse width modulation scope is 1 to 10ms, and pulse frequency adjustable range is 50 to 150Hz.
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| CN112517866A (en) * | 2020-11-16 | 2021-03-19 | 中国科学院金属研究所 | Method and device for refining magnetic pulse grains at lower end of continuous casting crystallizer |
| CN114406220A (en) * | 2022-01-25 | 2022-04-29 | 内蒙古科技大学 | Electrical aluminum conductor and preparation method thereof |
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| CN101386060A (en) * | 2008-10-09 | 2009-03-18 | 苏州有色金属研究院有限公司 | Novel copper and copper alloy plate belt electromagnetism assistant casting method and device |
| JP2010253554A (en) * | 2009-03-31 | 2010-11-11 | Kobe Steel Ltd | Continuous casting mold and horizontal continuous casting method |
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| CN104907514A (en) * | 2015-06-05 | 2015-09-16 | 上海蓝铸特种合金材料有限公司 | Horizontal continuous pipe-casting device |
| CN112517866A (en) * | 2020-11-16 | 2021-03-19 | 中国科学院金属研究所 | Method and device for refining magnetic pulse grains at lower end of continuous casting crystallizer |
| CN114406220A (en) * | 2022-01-25 | 2022-04-29 | 内蒙古科技大学 | Electrical aluminum conductor and preparation method thereof |
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