CN106925735A - A kind of device and method for preparing big specification high-quality aluminium alloy cast ingot - Google Patents
A kind of device and method for preparing big specification high-quality aluminium alloy cast ingot Download PDFInfo
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- CN106925735A CN106925735A CN201511020092.0A CN201511020092A CN106925735A CN 106925735 A CN106925735 A CN 106925735A CN 201511020092 A CN201511020092 A CN 201511020092A CN 106925735 A CN106925735 A CN 106925735A
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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
- B22D11/112—Treating the molten metal by accelerated cooling
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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
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
- B22D11/003—Aluminium alloys
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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
- B22D11/07—Lubricating the moulds
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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 present invention relates to a kind of device and method for preparing big specification high-quality aluminium alloy cast ingot, belong to metal material processing field.The device is mainly made up of uniform cooler, Re Ding, oil-air lubrication crystallizer, induction coil and dummy ingot；Heat top is arranged at the top of oil-air lubrication crystallizer, and induction coil is arranged on oil-air lubrication crystallizer outside, and uniform cooler is arranged in oil-air lubrication crystallizer, and dummy ingot is located at oil-air lubrication crystallizer lower section.The present invention is by subregion to gas crystallizer and uniform cooler and the ingenious combination of magnetic stirrer, the efficient coupling of three can realize melt compelling, equal-freezing shaping under gas pressure contact condition, make the air film of formation steady and continuous between melt and crystallizer, not only ingot casting surface is smooth, and interior tissue fine uniform.Using the present invention prepare large-size aluminum alloy high-quality ingot casting production efficiency it is high, be easily combined with big industrial production, there is wide prospects for commercial application in the manufacture such as Aero-Space, track traffic, ship field.
Description
Technical field
The invention belongs to metal material processing field, more particularly to a kind of dress for preparing big specification high-quality aluminium alloy cast ingot
Put and method.
Background technology
With the increasingly lifting of the large-scale outfit performance of manufacturing industry, in Aero-Space, track traffic, shipbuilding
More and more a kind of inevitable trend, such as large transport airplane, Gao Xing are turned into using large-scale monolithic construction Deng in field
Can opportunity of combat and bullet train all widely used big specification entirety aluminium of development and high-performance slab, and the preparation of these materials from
The aluminium alloy cast ingot of big specification high-quality is not opened, therefore, big specification high-quality aluminium alloy cast ingot is prepared to lifting manufacturing industry equipment
Ability is significant.
Semi-continuous casting is the production topmost method of aluminium alloy cast ingot.Yet with common semi-continuous casting technology
Limitation, during large-size aluminum alloy ingot is prepared, because the type of cooling is single, the solidification of ingot casting ecto-entad, Shi Bizao
It is deeper into metal bath liquid cave.Simultaneously as cast ingot dimension is larger, in process of setting, Uniformity of Temperature Field is difficult to control to, and causes
Scull is uneven, the problems such as scull thinner region is also easy to produce fold, pile displacement, even bleedout；Further, since ingot casting specification compared with
Greatly, and cooling effect is limited, necessarily reduce casting speed, forming core is less and uneven in melt, and crystal grain is extremely thick.Cause
This, the large-size aluminum alloy ingot surface quality prepared using traditional semi-continuous casting is poor, and interior tissue is thick and uneven, into
Divide segregation serious, ingot casting yield rate is low, it is necessary to can just carry out deformation processing, relatively costly, waste of material by railway carriage or milling face
Seriously.
In order to solve problems, researcher has carried out substantial amounts of research, to prepare the small uniform, unbiased of interior tissue
The good aluminium alloy cast ingot of analysis, surface quality.
Chinese patent CN104550798A proposes a kind of aluminum alloy semi-continuous casting electromagnetic mixing apparatus and method, using straight
The method that stream electric current and permanent magnet are combined, can design different melts in crystallization according to the size of aluminium ingot, shape, material composition
The type of flow and flow strength in device region, control the segregation behavior of alloying element and the growth pattern of dendrite, reach tissue
Homogenize the purpose with refinement.But, the invention is using the single type of cooling only by crystallizer consecutive solidification from outside to inside, aluminium
Non-uniform temperature problem cannot be solved in alloy melt process of setting, and especially for big size ingot-casting is prepared, the method is to melt
Stirring action it is limited, thermograde is larger in melt, and liquid cave is very deep, causes casting speed very slow, thus to improve ingot casting in
The effect of portion's quality is limited.
In terms of ingot surface quality is improved, with the AirsolVeil technologies of the Airslip technologies in the U.S. and Germany as generation
The air film casting method of table, its principle is one layer of air film of formation between crystallizer and ingot casting scull, reduces process of setting scull
With the contact of crystallizer inwall, it is solidification forming under gas contact condition to allow melt.Chinese patent CN100418667C
Oil-air lubrication crystallizer is improved on this basis, crystallizer oil, gas and water structure global design is proposed, by oil gas
Film heat-blocking action is reduced and once cooled down, and improves secondary water-cooled effect to improve the surface quality of ingot casting using two rows water spray round.
But existing air film casting method is difficult high quality and large size ingot casting at preparation.If big size ingot-casting is only cooled down by crystallizer,
Casting speed is slower, and melt is very thin and uneven by the first scull that crystallizer is cooled into, using oil film foundry engieering, oil gas
It is easy to penetrate just scull, the problems such as cause runout, bleedout, production technology is difficult control, therefore ingot diameters generally can not surpass
Cross 300mm (12 inches), and air film foundry engieering is the problems such as cannot solve solidified structure fine uniform and component segregation.
The content of the invention
Existing air film casting method can not prepare large-size aluminum alloy ingot, there is that ingot surface quality is poor, internal group
The problems such as knitting thick uneven, the deficiency of large-size aluminum alloy ingot presence, the present invention are prepared for existing semi-continuous casting method
A kind of new equipment and method for preparing big specification high-quality aluminium alloy cast ingot is proposed, crystallizer is applied in air film casting process
Uniformly cooling and the outer electromagnetic agitation of crystallizer couple melt treatment for interior centre, when large standard high quality aluminium alloy cast ingot is prepared, together
When solve the problems, such as ingot surface quality and internal soundness.
Its main design idea is：It is difficult to prepare big specification for existing air film casting method (with diameter greater than 300mm)
Aluminium alloy cast ingot, crystallizer gives gas structure design using subregion, reduces charged air pressure difference on graphite annulus, realizes stability contorting gas
Body pressure, it is ensured that the air film of steady and continuous can be formed between melt and crystallizer；Alloy during semi-continuous casting is melted
Body applies uniform cooling and the outer electromagnetic agitation coupling processing of crystallizer in crystallizer, increases the cooling dimension in Casting Ingot Solidification Process
Degree, strengthens the three-dimensional convection current of process of setting melt, improves large volume alloy melt temperature field and the uniformity into branch, is protecting
While card inside ingot quality, improve the uniformity of initial solidification, increase just solidified shell thickness, prevent just scull and oil gas film broken
Split, reduce the contact of initial stage scull and crystallizer inwall, realize melt solidification forming under gas pressure contact condition, make
It is standby go out all good large-size aluminum alloy ingot of inside and outside quality.
A kind of new equipment for preparing big specification high-quality aluminium alloy cast ingot, mainly by uniform cooler, Re Ding, oil-air lubrication
Crystallizer, induction coil and dummy ingot composition；Described heat top is arranged at the top of oil-air lubrication crystallizer, described induction coil
Oil-air lubrication crystallizer outside is arranged on, described uniform cooler is arranged in oil-air lubrication crystallizer, described dummy ingot position
In oil-air lubrication crystallizer lower section.
Described oil-air lubrication crystallizer includes crystallizer body and graphite annulus, and graphite annulus is arranged on the upper of crystallizer body
Side, graphite annulus outer wall is provided with air drain and oil groove, and air drain is divided into 3~20 sections, and every section of air drain length is 100~500mm, and every section individually
Inlet channel is set, individually supply, individually control；Oil groove is separated with air drain, and oil groove is arranged on air drain top, and graphite annulus is using more
Prepared by hole graphite, gas and lubricating oil ooze out crystallizer by graphite annulus.Oil-air lubrication crystallizer is set using subregion to depressed structure
Meter, reduces the single difference to tolerance and air pressure in gas graphite annulus air drain, reaches the purpose of stability contorting gas pressure.
Described oil-air lubrication crystallizer is designed using double hole for water spraying.Upper and lower two are set on described crystallizer body
Row's hole for water spraying, upper row's hole for water spraying and crystallizer wall angle are 15~30 °, a diameter of 1~5mm, lower row's hole for water spraying and crystallizer wall
Angle is 0~25 ° and more than 0 °, it is ensured that cooling water can be ejected on ingot casting and not splash, a diameter of 2~8mm.Double water spray
Hole water can be controlled individually, and upper row's water spray bore dia need to be less than or equal to lower row water spray bore dia.
Described induction coil is arranged on outside crystallizer, and yoke (iron core) is designed using extension type, and length is variable, is stretched
Scope is 0~100mm, and electromagnetic induction coil produces electromagnetic field to import crystallizer inner melt through yoke.Magnet coil can be produced
Rotary electromagnetic field, travelling-wave electromagnetic field or composite electromagnetic field.
The uniform cooler top is adiabatic end, and bottom is colling end, and adiabatic end is provided with stirring vane, semicontinuous
In casting process, uniform cooler extend into crystallizer height and position by heat top, and uniform cooler bottom is concordant with crystallizer,
Uniform cooler can set one or more, and uniform cooler can be rotated, and rotary speed is 0~300r/min.
Adiabatic end is cylindrical shape, and external diameter is 100~800mm, is made of high temperature resistant thermally insulative ceramic material, is made with thermal insulation
With, it is ensured that the melt in heat top is not cooled；Colling end is made of Heat Conduction Material, such as graphite, copper, molybdenum, titanium and its composite wood
Material, colling end has cooling effect；Uniform cooler colling end has spiral-shaped, is produced when uniform cooler is rotated and forces molten
The effect that body flows downward；Stirring vane is made of exotic material, such as copper, molybdenum, titanium, ceramic composite materials, stirring
The number of blade is 0~8, and width is 10~100mm, and thickness is 2~8mm, and stirring vane is rotated with uniform cooler, molten with forcing
The effect that body flows downward, makes melt constantly add to downwards in the middle of liquid cave, plays the effect of dynamic continuous uniform cooling；
Circulating cooling medium is passed through inside even cooler, cooling medium reaches colling end, is exchanged heat by colling end and melt, cooling medium
It is the various fluids such as air, nitrogen gas and water, oil, cooling medium consumption is 0~2000L/min.
Based on said apparatus, the present invention proposes a kind of method for preparing big specification high-quality aluminium alloy cast ingot, is partly connecting
In continuous casting process, by refining treatment and more than liquidus curve 80~100 DEG C of melt will be stabilized to pour into heat top；Graphite annulus
Outer wall air drain and oil groove are passed through air and lubricating oil；The flow of hole for water spraying and lower row's hole for water spraying is arranged in control；Alloy melt is through warm
Top, crystallizer reach dummy ingot top, and melt liquid level rises to requirement height, and continuous casting starts, and dummy ingot slowly declines, and cooling water flow delays
Slow to increase, process to be cast enters stable state, applies uniform cooling and electromagnetic agitation treatment, finally gives big specification high-quality
Aluminium alloy cast ingot.
During semi-continuous casting, air mass flow is 500~5000mL/min in described air drain, and oil groove uses pulse
Formula fuel feeding, fuel delivery is 60~100/s；The flow of upper row's hole for water spraying is 1~50L/min, the flow of lower row's hole for water spraying for 20~
100L/min；Casting speed is 20~100mm/min.The intensity of cooling of uniform cooling treatment is 500~5000W/ (m2K),
The shear rate of electromagnetic agitation treatment is 10~2000s-1。
Novelty of the invention and technological progress are mainly reflected in：
1. the present invention crystallizes oil-air lubrication crystallizer subregion to gas structure design during semi-continuous casting with applying
Uniform cooling and the outer electromagnetism ingenious combination of stir process of crystallizer in the middle of device, by controlling uniform cooling effect of cooler, stirring
Blade construction and the triangular effect of intercoupling of rotating speed, electromagnetic agitation shear strength, can produce whole melt and force uniform
Cooling and three-dimensional convection current, improve intensity of cooling on the basis of, significantly improve temperature field and the uniformity into branch, not only from
Fundamentally solve common semi-continuous casting method prepare large-size aluminum alloy ingot exist the thick uneven, gross segregation of tissue,
Problems of crack, and cause that the uniformity and concreting thickness of initial stage scull are also increased considerably, efficiently reduce the initial stage
Scull and the contact of crystallizer inwall, realize melt solidification forming under gas pressure contact condition, significantly improve ingot casting
Surface quality.
2. pair large-size aluminum alloy oil-air lubrication cleaner gives gas structure design using subregion, can reduce and single give gas graphite
The difference of tolerance and air pressure in ring air drain, being capable of stability contorting gas pressure；Using pulsed fuel feeding, make melt and crystallizer it
Between can form the air film of steady and continuous, reach the effect of stabilization lubrication, solve large-size aluminum alloy ingot (with diameter greater than
300mm) can not be smooth using the technical problem of air film casting, ingot casting surface.
3. the big size ingot-casting crystal grain that prepared by the present invention is tiny, and composition is uniform, and surface is smooth, and casting speed is fast, significantly drop
It is low subsequently to homogenize and processing cost, improve production efficiency and lumber recovery.Overall procedure simple possible, implementation result is good, can
Realize industrialized production.
Brief description of the drawings
Fig. 1 is the structural representation that the present invention prepares high quality and large size aluminium alloy cast ingot device.
Fig. 2 is graphite annulus subregion schematic diagram.
Fig. 3 is the enlarged drawing in crystallizer part E areas in Fig. 1.
Fig. 4 is uniform cooler schematic diagram.
Fig. 5 a and Fig. 5 b are respectively the aluminium alloy cast ingots of Φ 582mm specifications 7075 prepared by common semi-continuous casting and the present invention
Appearance photo.
Fig. 6 a and Fig. 6 b are respectively the aluminium alloy cast ingots of Φ 582mm specifications 7075 prepared by common semi-continuous casting and the present invention
Microstructure.
Main Reference Numerals explanation：
The heat of 1 uniform cooler 2 top
The oil-air lubrication crystallizer of 3 melt 4
The coil of 5 yoke 6
The hole for water spraying of 7 graphite annulus 8
The dummy ingot of 9 ingot casting 10
The air drain of 11 oil groove 12
14 times row's hole for water sprayings of hole for water spraying are arranged on 13
15 adiabatic end 16 stirring vanes
17 colling ends
Specific embodiment
The present invention can be implemented according to following instance, but not limited to this, these embodiments this hair solely for the purpose of illustration
Bright implementation process, rather than the scope of the present invention is limited by any way, below in an example, the various mistakes not described in detail
Journey and method are conventional methods as known in the art.
As shown in figure 1, apparatus of the present invention include uniform cooler 1, heat top 2, melt 3, oil-air lubrication crystallizer 4, yoke
5th, coil 6, graphite annulus 7, hole for water spraying 8, ingot casting 9, dummy ingot 10 etc..Heat top 2 is arranged at the top of oil-air lubrication crystallizer 4, coil 6
It is arranged on outside oil-air lubrication crystallizer 4 with yoke 5, uniform cooler 1 is arranged in oil-air lubrication crystallizer 4, dummy ingot 10 is located at
The lower section of oil-air lubrication crystallizer 4.
Oil-air lubrication crystallizer 4 includes crystallizer body and graphite annulus 7, and graphite annulus 7 is arranged on the top of crystallizer body,
The outer wall of graphite annulus 7 is provided with air drain 12 and oil groove 11, and air drain 12 uses sectional design, as shown in Fig. 2 12 points of air drain is 3~20
Section, every section of length of air drain 12 is 100~500mm, and every section is separately provided inlet channel, individually supply, individually control；Oil groove 11 with
Air drain 12 is separated, and oil groove 11 is arranged on the top of air drain 12, and graphite annulus 7 is prepared using porous graphite, and gas and lubricating oil pass through stone
Black ring 7 oozes out crystallizer.
Oil-air lubrication crystallizer 4 is designed using double hole for water spraying, as shown in Figure 3；Two row's hole for water sprayings individually control water, on
Row hole for water spraying 13 and the inwall angle of oil-air lubrication crystallizer 4 are 15~30 °, a diameter of 1~5mm, lower row's hole for water spraying 14 and oil gas
The lubrication wall angle of crystallizer 4 is 0~25 ° and more than 0 °, a diameter of 2~8mm, and upper row's water spray bore dia need to spray less than or equal to lower row
Water hole diameter.
Yoke 5 is designed using extension type.The length of yoke 5 is variable, and telescopic extensions are 0~100mm, electromagnetic induction coil 6
Electromagnetic field is produced to import crystallizer inner melt through yoke 5.Magnet coil 6 can produce rotary electromagnetic field, travelling-wave electromagnetic field or multiple
Close electromagnetic field.
During semi-continuous casting, uniform cooler 1 extend into the height and position of oil-air lubrication crystallizer 4 by heat top 2,
Uniform cooler 1 can set one or more, and uniform cooler 1 can be rotated, and rotary speed is 0~300r/min.Such as Fig. 4
Shown, uniform cooler 1 is made up of upper thermal barrier end 15 and bottom colling end 17, and adiabatic end 15 sets stirring vane 16；Top
Adiabatic end 15 is cylindrical shape, and external diameter is 100~800mm, is made using high-temperature resistant thermal insulating material；Colling end 17 uses Heat Conduction Material
It is made, such as graphite, copper, molybdenum, titanium and its composite；The colling end 17 of uniform cooler 1 has spiral-shaped, uniform cooler
1 produces the effect for forcing melt to flow downward when rotating；Stirring vane number is 0~8, and width of blade is 10~100mm, and blade is thick
It is 2~8mm to spend, and stirring vane 16 is made of exotic material, such as copper, molybdenum, titanium, ceramic composite materials, blade with
Uniform cooler 1 is rotated, and during use, drives melt to collect to the colling end 17 of uniform cooler 1, in uniform cooler 1
Be passed through circulating cooling medium, cooling medium reaches colling end 17, exchanged heat by colling end 17 and melt, cooling medium be air,
The various fluids such as nitrogen gas and water, oil, cooling medium consumption is 0~2000L/min, realizes melt uniform subcooling, the melt of continuous dynamic
By uniform cooler bottom coohng, continue to flow downward into liquid cave mushy zone, realize that the continuous dynamic of melt is uniformly cooled down
With pressure feeding, the big size ingot-casting of fine grain homogeneous is finally prepared.
Application method is：During semi-continuous casting, package unit is preheated to 80~200 DEG C, will be by refining treatment
And stabilize to during more than liquidus curve 80~100 DEG C of melt pours into the present apparatus.In casting process：The outer wall air drain 12 of graphite annulus 7
Air and lubricating oil are passed through with oil groove 11, air mass flow is 500~5000mL/min, and fuel feeding uses pulsed, and fuel delivery is 60
~100/s；Magnet coil 6 is opened, electric current is 10~200A, and the flow of the row's of control hole for water spraying 13 is 1~50L/min, lower row
The flow of hole for water spraying 14 is 20~100L/min；Casting speed is 20~100mm/min.
Alloy melt reaches the top of dummy ingot 10 through heat top 2, crystallizer 4, and melt liquid level rises to requirement height, and continuous casting starts,
Dummy ingot 10 slowly declines, and cooling water flow is slowly increased, and process to be cast enters stable state, applies uniform cooling and electromagnetism is stirred
Treatment is mixed, the intensity of cooling of uniform cooling treatment is 500~5000W/ (m2K), the shear rate of electromagnetic agitation treatment is 10
~2000s-1, until casting process terminates.
The aluminium alloy round cast ingot of Φ 582mm specifications 7075 is prepared using the present invention, it is desirable to which surface is smooth, interior tissue is tiny
It is even.Specific embodiment is as follows：
As shown in figure 1, oil-air lubrication crystallizer 4 gives gas system using subregion, graphite annulus 7 is externally provided with apparatus structure schematic diagram
Air drain 12 and oil groove 11,12 points of air drain are 4 sections, and every section of length of air drain 12 is 456mm, and every section is separately provided inlet channel, individually
Supply, individually control；Oil groove 11 is separated with air drain 12, and oil groove 11 is arranged on the top of air drain 12, and graphite annulus 7 uses porous graphite system
It is standby.Upper row's hole for water spraying 13 and crystallizer wall angle are 25 °, a diameter of 2mm, and lower row's hole for water spraying 14 and crystallizer wall angle are 10 °,
A diameter of 5mm, double hole for water spraying water can be controlled individually.
Uniform cooler 1 is arranged on casting platform, a diameter of 300mm of cooler, and cooler, heat top and crystallizer are same
The heart, the bottom of uniform cooler 1 is concordant with the bottom of crystallizer.The uniform adiabatic end 15 of cooler 1 uses high temperature resistant insulating ceramic system
Into a diameter of 300mm, thickness is 10mm, a diameter of 350mm of bottom colling end 17, is made of graphite, and the number of blade is 3, and blade is wide
It is 50mm to spend.The uniform rotating speed of cooler 1 is 60r/min.
Magnet coil is arranged on the periphery of oil-air lubrication crystallizer 4, and magnet coil produces rotary electromagnetic field, to alloy melt
Implement shearing, yoke length is 50mm.
During semi-continuous casting, by refining treatment and more than liquidus curve 100 DEG C of melt will be stabilized to pour into heat
In top.The outer wall air drain 12 of graphite annulus 7 and oil groove 11 are passed through air and lubricating oil, and air mass flow is 1430mL/min, using pulse
Formula fuel feeding, fuel delivery is 80/s；The flow of the row's of control hole for water spraying 13 is 20L/min, and the flow of lower row's hole for water spraying 14 is 30L/
min；Casting speed is 65mm/min.Alloy melt reaches crystallizer by heat top 2, and melt liquid level rises to requirement height, continuous casting
Start, dummy ingot 10 slowly declines, and cooling water flow slowly increases, process to be cast enters stable state, apply uniform cooling and
Electromagnetic agitation treatment, the intensity of cooling of uniform cooling treatment is 1210W/ (m2K), the shear rate of electromagnetic agitation treatment is
110s-1, until casting process terminates.
By contrasting the aluminium alloy round cast ingot surface matter of Φ 582mm specifications 7075 prepared by common semi-continuous casting and the present invention
Amount and interior tissue, find using common semi-continuous casting prepare ingot surface quality is poor, interior tissue is thick, as Fig. 5 a,
Shown in Fig. 6 a；The ingot casting surface-brightening prepared using the present invention, interior tissue fine uniform, average grain size is 154 μm, such as
Shown in Fig. 5 b, Fig. 6 b.
By subregion to gas crystallizer and uniform cooler and the ingenious combination of magnetic stirrer, subregion gives gas crystallizer to the present invention
Stability contorting gas pressure is designed to, uniform cooler increases the cooling dimension in Casting Ingot Solidification Process, and magnetic stirrer is strong
Change the three-dimensional convection current of process of setting melt, improve large volume alloy melt temperature field and the uniformity into branch, three's has
Effect coupling can realize melt compelling, equal-freezing shaping under gas pressure contact condition, and making being capable of shape between melt and crystallizer
Into the air film of steady and continuous, not only ingot casting surface is smooth, and interior tissue fine uniform.The big specification prepared using the present invention
Aluminium alloy high-quality ingot casting production efficiency is high, be easily combined with big industrial production, in the system such as Aero-Space, track traffic, ship
The field of making has wide prospects for commercial application.
Claims (10)
1. a kind of device for preparing big specification high-quality aluminium alloy cast ingot, it is characterised in that：The device it is main by uniform cooler,
Hot top, oil-air lubrication crystallizer, induction coil and dummy ingot composition；Described heat top is arranged at the top of oil-air lubrication crystallizer,
Described induction coil is arranged on oil-air lubrication crystallizer outside, and described uniform cooler is arranged at oil-air lubrication crystallizer
Interior, described dummy ingot is located at oil-air lubrication crystallizer lower section.
2. the device for preparing big specification high-quality aluminium alloy cast ingot according to claim 1, it is characterised in that：Described oil
Gas lubrication crystallizer includes crystallizer body and graphite annulus, and described graphite annulus is arranged on the top of crystallizer body, described
Graphite annulus outer wall is provided with air drain and oil groove, and described oil groove and air drain is separated, and described oil groove is arranged on air drain top；Described
Air drain is divided into 3~20 sections, every section of individually supply, individually control.
3. the device for preparing big specification high-quality aluminium alloy cast ingot according to claim 2, it is characterised in that：Every section of air drain
Length is 100~500mm；Described graphite annulus is made of porous graphite.
4. the device for preparing big specification high-quality aluminium alloy cast ingot according to claim 1, it is characterised in that：Described knot
Upper and lower two rows hole for water spraying is set on brilliant device body, and upper row's hole for water spraying and crystallizer wall angle are 15~30 °, a diameter of 1~5mm,
Lower row's hole for water spraying and crystallizer wall angle are 0~25 ° and more than 0 °, a diameter of 2~8mm；Double hole for water spraying water is individually controlled,
Upper row's water spray bore dia is less than or equal to lower row water spray bore dia.
5. the device for preparing big specification high-quality aluminium alloy cast ingot according to claim 1, it is characterised in that：Described sense
The yoke of coil is answered to be designed using extension type, telescopic extensions are 0~100mm, induction coil produces electromagnetic field to be imported through yoke
Crystallizer inner melt；Described induction coil produces rotary electromagnetic field, travelling-wave electromagnetic field or composite electromagnetic field.
6. the device for preparing big specification high-quality aluminium alloy cast ingot according to claim 1, it is characterised in that：It is described uniform
Cooler top is adiabatic end, and bottom is colling end, and described adiabatic end is provided with stirring vane；Described adiabatic end is cylinder
Shape, is made of high temperature resistant thermally insulative ceramic material；Described colling end is made of Heat Conduction Material；Described stirring vane is used
Exotic material is made, and stirring vane number is 0~8.
7. the device for preparing big specification high-quality aluminium alloy cast ingot according to claim 6, it is characterised in that：Described is exhausted
Hot junction external diameter is 100~800mm；Described colling end have it is spiral-shaped, using graphite, copper, molybdenum, titanium or its composite system
Into；Described stirring vane is made of copper, molybdenum, titanium, ceramics or its composite, and stirring vane width is 10~100mm, thick
It is 2~8mm to spend.
8. the device for preparing big specification high-quality aluminium alloy cast ingot according to claim 1, it is characterised in that：Described is equal
Even cooler is one or more, is set to crystallizer height and position, and rotary speed is 0~300r/min；Described is uniform cold
But the cooling medium that device is used is air, nitrogen gas and water or oil, and cooling medium consumption is 0~2000L/min.
9. a kind of method for preparing big specification high-quality aluminium alloy cast ingot, comprises the following steps：During semi-continuous casting, will
By refining treatment and stabilize to more than liquidus curve 80~100 DEG C of melt and pour into heat top；Graphite annulus outer wall air drain and oil groove
It is passed through air and lubricating oil；The flow of hole for water spraying and lower row's hole for water spraying is arranged in control；Alloy melt is reached through heat top, crystallizer and drawn
Ingot top, melt liquid level rises to requirement height, and continuous casting starts, and dummy ingot slowly declines, and cooling water flow is slowly increased, mistake to be cast
Journey enters stable state, applies uniform cooling and electromagnetic agitation treatment, finally gives big specification high-quality aluminium alloy cast ingot.
10. the method for preparing big specification high-quality aluminium alloy cast ingot according to claim 9, it is characterised in that：Described
Air mass flow is 500~5000mL/min in air drain, and described oil groove uses pulsed fuel feeding, and fuel delivery is 60~100/s；On
The flow for arranging hole for water spraying is 1~50L/min, and the flow of lower row's hole for water spraying is 20~100L/min；Casting speed be 20~
100mm/min；The intensity of cooling of uniform cooling treatment is 500~5000W/ (m2K), the shear rate of electromagnetic agitation treatment is
10~2000s-1。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511020092.0A CN106925735B (en) | 2015-12-30 | 2015-12-30 | A kind of device and method preparing big specification high-quality aluminium alloy cast ingot |
| US16/067,306 US20190009328A1 (en) | 2015-12-30 | 2016-06-15 | Device and method for preparing large-sized high-quality aluminium alloy ingot |
| PCT/CN2016/085826 WO2017113630A1 (en) | 2015-12-30 | 2016-06-15 | Device and method for preparing large-sized high-quality aluminium alloy ingot |
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| CN107350438A (en) * | 2017-09-01 | 2017-11-17 | 佛山市科立天源冶金技术有限公司 | A kind of crystallizer |
| CN107470573A (en) * | 2017-08-08 | 2017-12-15 | 江苏亚太航空科技有限公司 | Oil-air lubrication crystallizer |
| CN108436047A (en) * | 2018-04-23 | 2018-08-24 | 东北大学 | Resultant field prepares the device and method of big specification fine grain homogeneous aluminium alloy cast ingot |
| CN108543921A (en) * | 2018-04-23 | 2018-09-18 | 东北大学 | Strong shear is with electromagnetic field coordinate system for the device and method of big specification homogeneous ingot casting |
| CN109894586A (en) * | 2019-04-15 | 2019-06-18 | 中国科学院金属研究所 | A kind of preparation method of low surface segregation layer thickness aluminium alloy continuous casting ingot |
| CN110551930A (en) * | 2019-10-10 | 2019-12-10 | 全椒县同鑫模具配套有限公司 | Processing technology of refrigerator foaming die casting |
| CN111069552A (en) * | 2020-03-05 | 2020-04-28 | 郑州市豫中铝镁装备有限公司 | Oil gas sliding casting crystallizer |
| CN113373350A (en) * | 2021-06-07 | 2021-09-10 | 浙江最成半导体科技有限公司 | Aluminum alloy ingot for target material, preparation method of aluminum alloy ingot and aluminum alloy target material |
| CN114012052A (en) * | 2021-12-30 | 2022-02-08 | 东北大学 | Horizontal continuous casting equipment for aluminum alloy cast ingot |
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| CN111069552A (en) * | 2020-03-05 | 2020-04-28 | 郑州市豫中铝镁装备有限公司 | Oil gas sliding casting crystallizer |
| CN113373350A (en) * | 2021-06-07 | 2021-09-10 | 浙江最成半导体科技有限公司 | Aluminum alloy ingot for target material, preparation method of aluminum alloy ingot and aluminum alloy target material |
| CN113373350B (en) * | 2021-06-07 | 2022-08-16 | 浙江最成半导体科技有限公司 | Aluminum alloy ingot for target material, preparation method thereof and aluminum alloy target material |
| CN114012052A (en) * | 2021-12-30 | 2022-02-08 | 东北大学 | Horizontal continuous casting equipment for aluminum alloy cast ingot |
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