CN108220637A - 5A03 aluminium alloy cast ingots production method and 5A03 aluminium alloy cast ingots and application - Google Patents
5A03 aluminium alloy cast ingots production method and 5A03 aluminium alloy cast ingots and application Download PDFInfo
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- CN108220637A CN108220637A CN201711480380.3A CN201711480380A CN108220637A CN 108220637 A CN108220637 A CN 108220637A CN 201711480380 A CN201711480380 A CN 201711480380A CN 108220637 A CN108220637 A CN 108220637A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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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
- B22D7/00—Casting ingots, e.g. from ferrous metals
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/02—Refining by liquating, filtering, centrifuging, distilling, or supersonic wave action including acoustic waves
- C22B9/023—By filtering
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
Abstract
The present invention provides 5A03 aluminium alloy cast ingots production method and 5A03 aluminium alloy cast ingots and applications, are related to Alloy Processing field.The 5A03 aluminium alloy cast ingot production methods, aluminium alloy scrap and remelting are subjected to melting, dispensing, refining, standing and casting with aluminium ingot, wherein, double-stage filtering system and four rotor continuous degassing systems are used in casting process, the super large-scale 5A03 aluminium alloy cast ingots that width is 2400 2850mm are obtained by aforementioned production method, the technical issues of it is complicated to equipment, technology requirement height, wide cut foundry engieering to improve production super large-scale 5A03 aluminium alloy cast ingots in the prior art, and is only capable of producing ingot casting of the maximum wide cut for 2400mm.The present invention also provides 5A03 aluminium alloy cast ingots, are processed and are made using aforementioned production method.
Description
Technical field
The present invention relates to Alloy Processing field, in particular to 5A03 aluminium alloy cast ingots production method and 5A03
Aluminium alloy cast ingot and application.
Background technology
The development of China in Recent Years aluminum i ndustry is swift and violent.On aluminium processing industry, particularly wide cut aluminium milling material, domestic founding,
Casting equipment and technology generally fall behind, and result in needs the external big specification slab ingot of high capital purchase every year.Produce super large-scale
Slab ingot is very high to equipment, technology requirement, and fluid origin ingot casting blank quality directly affects aluminium sheet strip and foil product quality, and wide cut is cast
Make technical sophistication.The domestic wide cut ingot casting width of production at present is up to 2400mm, can not fully meet Aeronautics and Astronautics, traffic fortune
Defeated aluminum alloy sheets and strips production.
In view of this, it is special to propose the present invention to solve above-mentioned technical problem.
Invention content
First of the present invention is designed to provide a kind of 5A03 aluminium alloy cast ingots production method, by by aluminium alloy scrap
Melting, dispensing, refining, standing and casting are carried out with aluminium ingot with remelting, obtains the super large-scale 5A03 that width is 2400-2850mm
Aluminium alloy cast ingot improves production super large-scale 5A03 aluminium alloy cast ingots in the prior art and equipment, technology requirement height, wide cut is cast
The technical issues of making technical sophistication, and being only capable of producing ingot casting of the maximum wide cut for 2400mm.
Second object of the present invention is to provide a kind of 5A03 aluminium alloy cast ingots.
Second object of the present invention is to provide a kind of application of 5A03 aluminium alloy cast ingots production method.
In order to realize the above-mentioned purpose of the present invention, spy uses following technical scheme：
The present invention provides a kind of 5A03 aluminium alloy cast ingots production methods, include the following steps：
(a) aluminium alloy scrap and remelting are subjected to melting and dispensing with aluminium ingot；
(b) melt after dispensing is refined, is stood after the completion of refining；
(c) melt after standing is cast, obtains the 5A03 aluminium alloy cast ingots that width is 2400-2850mm；Wherein,
In casting process, removed the gred, at degasification to the melt after standing using on-line filtration system, the continuous depassing unit of four rotors
Reason, is cast using casting crystallizer, and on-line filtration system is double-stage filtering system.
Further, in step (a), the weight ratio of the aluminium alloy scrap and remelting aluminium ingot is (0.1-10):1.
Further, in step (b), the melt after melting is placed in tilt bed standing furnace and is refined, refining temperature
It is 710-740 DEG C, refining time 40-50min；
Preferably, it scratches clean surface scum after the completion of refining and stands 30-40min, melt temperature is controlled at 710-720 DEG C.
Further, in step (c), the double-stage filtering system includes by-pass filtration system and secondary filtration system, institute
State the ceramic filter plate that by-pass filtration system and secondary filtration system separately use 20PPi-50PPi, by-pass filtration system
The aperture of ceramic filter plate is more than the aperture of ceramic filter plate used by secondary filtration system used by system；
Preferably, the by-pass filtration system uses the ceramic filter plate of 30PPi, and the secondary filtration system uses
The ceramic filter plate of 40PPi.
Further, in step (c), by the melt after standing pass sequentially through by-pass filtration system, online refinement machine, four turns
After sub continuous depassing unit and secondary filtration system, it is poured into casting crystallizer and is cast；
Preferably, it is Al-Ti-C grain refiner used by online refinement machine in step (c)；
Preferably, in step (c), the rotor speed in the continuous depassing unit of four rotors turns/min for 400-500；
Preferably, in step (c), casting crystallizer is multifunctional numerical control crystallizer, and the casting crystallizer uses liquid level
Automatic control system, level control is in 50-70mm.
Further, in step (c), casting temperature is 685-695 DEG C, and casting speed control is in 45-55mm/min, cooling
Water flow is controlled in 40-80m3/ h, water temperature are 25-35 DEG C；
Preferably, in step (c), casting temperature is 686-695 DEG C, and casting speed is controlled in 46-55mm/min, cooling water
Flow control is in 45-80m3/ h, water temperature are 26-35 DEG C.
Further, the 5A03 aluminium alloy cast ingot production methods, include the following steps：
(a) aluminium alloy scrap and remelting are subjected to melting and dispensing with aluminium ingot；
(b) melt after dispensing is refined, refining temperature is 710-740 DEG C, refining time 40-50min, refining
30-40min is stood after the completion, and melt temperature is controlled at 710-720 DEG C；
(c) by the melt after standing pass sequentially through by-pass filtration system, online refinement machine, the continuous depassing unit of four rotors and
It after secondary filtration system, is poured into casting crystallizer and is cast, obtain the 5A03 aluminium alloys that width is 2450-2850mm and cast
Ingot；Wherein, it is Al-Ti-C grain refiner used by online refinement machine.
Further, the 5A03 aluminium alloy cast ingots include the element of following mass percentage：Si0.6-0.7%, Fe
0.3-0.4%, Cu≤0.1%, Mn 0.4-0.5%, Mg 3.4-3.6%, Cr≤0.1%, Ti 0.035-0.045%, other
Impurity element ＜ 0.05%, surplus Al；
Preferably, the width of the 5A03 aluminium alloy cast ingots is 2450-2850mm.
The present invention also provides a kind of 5A03 aluminium alloy cast ingots, are obtained by above-mentioned 5A03 aluminium alloy cast ingot production methods
It arrives, the width of the 5A03 aluminium alloy cast ingots is 2400-2850mm, further preferably preferably 2450-2850mm, 2500-
2850mm。
The present invention also provides application of the above-mentioned 5A03 aluminium alloy cast ingots production method in aluminium alloy cast ingot.
Compared with prior art, the invention has the advantages that：
(1) the present invention provides a kind of 5A03 aluminium alloy cast ingots production method, by aluminium alloy scrap and remelting aluminium ingot into
Row melting, dispensing, refining, standing and casting obtain the super large-scale 5A03 aluminium alloy cast ingots that width is 2400-2850mm,
In, using double-stage filtering system in casting process, it on the one hand can effectively filter a large amount of impurity, it is entirely avoided two in stove
On the other hand secondary pollution can sufficiently achieve big size ingot-casting flow indicator, the situation for preventing molten aluminum flow from not supplying；And it is casting
It makes using four rotor continuous degassing systems in degassing procedure, this system, which has, passes through the advantages such as flow is big, degassing effect is good, four turns
The outgassing rate of the more conventional birotor depassing unit of the outgassing rate of sub- off gas system improves 50%.It is obtained by aforementioned production method
5A03 aluminium alloy cast ingots its width may be up to 2850mm, improve production super large-scale 5A03 aluminium alloy cast ingots in the prior art
To equipment, technology requirement is high, wide cut foundry engieering is complicated, and the technology for being only capable of producing the ingot casting that maximum wide cut is 2400mm is asked
Topic.
(2) the present invention provides a kind of 5A03 aluminium alloy cast ingots, are processed by above-mentioned 5A03 aluminium alloy cast ingots production method
It obtains, the width of obtained 5A03 aluminium alloy cast ingots is up to 2400-2850mm, the 5A03 aluminium alloy cast ingots one of the super large-scale
Aspect can meet aerospace, communications and transportation Aluminum sheets aluminium alloy use demand, on the other hand be deformed using big specification wide cut
As blank, production cost can be reduced, improve production efficiency and yield rate, reduce energy consumption.
(3) the present invention provides a kind of application of 5A03 aluminium alloy cast ingots production method, in view of above-mentioned 5A03 aluminium alloys are cast
The advantage of ingot production method so that the production method has good application in aluminum alloy processing technology field, is super large-scale
The industrialized production of 5A03 aluminium alloy cast ingots provides foundation.
Specific embodiment
Embodiment of the present invention is described in detail below in conjunction with embodiment, but those skilled in the art will
Understand, the following example is merely to illustrate the present invention, and is not construed as limiting the scope of the invention.It is not specified in embodiment specific
Condition person, the condition suggested according to normal condition or manufacturer carry out.Reagents or instruments used without specified manufacturer is
The conventional products that can be obtained by commercially available purchase.
According to an aspect of the invention, there is provided a kind of 5A03 aluminium alloy cast ingots production method, includes the following steps：
(a) aluminium alloy scrap and remelting are subjected to melting and dispensing with aluminium ingot；
(b) melt after dispensing is refined, is stood after the completion of refining；
(c) melt after standing is cast, obtains the 5A03 aluminium alloy cast ingots that width is 2400-2850mm；Wherein,
In casting process, removed the gred, at degasification to the melt after standing using on-line filtration system, the continuous depassing unit of four rotors
Reason, is cast using casting crystallizer, and on-line filtration system is double-stage filtering system.
5A03 aluminium alloy cast ingots production method provided by the invention, by aluminium alloy scrap and remelting with aluminium ingot carry out melting,
Dispensing, refining, standing and casting obtain the super large-scale 5A03 aluminium alloy cast ingots that width is 2400-2850mm, improve existing
It is complicated to equipment, technology requirement height, wide cut foundry engieering that super large-scale 5A03 aluminium alloy cast ingots are produced in technology, and are only capable of producing
The technical issues of maximum wide cut is the ingot casting of 2400mm.It is cast by the 5A03 aluminium alloys of super large-scale that the production method obtains
On the one hand ingot can meet aerospace, communications and transportation Aluminum sheets aluminium alloy use demand, on the other hand using big specification wide cut
Deformation can reduce production cost, improve production efficiency and yield rate, reduce the consumption of the energy as blank.
Wherein, in the casting process of the 5A03 aluminium alloy cast ingot production methods, using double-stage filtering system, on the one hand can have
Effect filters a large amount of impurity, it is entirely avoided on the other hand the secondary pollution in stove can sufficiently achieve big size ingot-casting flow
Index, the situation for preventing molten aluminum flow from not supplying；And using four rotor continuous degassing systems in degassing procedure is cast, this is
System, which has, passes through the advantages such as flow is big, degassing effect is good, and the birotor degasification that the outgassing rate of four rotor off gas systems is more conventional fills
The outgassing rate put improves 50%.
Specifically, in step (a), using aluminium alloy scrap and remelting by the use of aluminium ingot as raw materials for production.Wherein, aluminium alloy scrap
Refer to the process residue of institute's output in aluminium and alloy product process of manufacture.
The weight ratio of aluminium alloy scrap and remelting aluminium ingot is not particularly limited.A kind of preferred reality as the present invention
Apply mode, the weight ratio of aluminium alloy scrap and remelting aluminium ingot is (0.1-10):1, further preferably (0.5-8):1, it is more excellent
It is selected as (0.5-5):1.
Aluminium alloy scrap and the typical but non-limiting weight ratio of remelting aluminium ingot are 0.1:1、0.5:1、1:1、2:1、3:
1、4:1、5:1、6:1、7:1、8:1、9:1 or 10:1.
Aluminium alloy scrap and remelting are packed into smelting furnace with aluminium ingot raw material and carry out melting operation.Smelting furnace Central Plains is materialized flat
After open electromagnetic agitation, on the one hand can accelerate burn-off rate, another aspect melt can avoid part molten in continuous flowing
Body overheats.Melt temperature proceeds by batch operation when reaching 720-740 DEG C, dispensing is used for Al-Si intermediate alloys, Fe in the middle
The auxiliary materials such as additive, Mn additives, pure Mg (Ti in ingredient by cast it is online in a manner of be added), after the completion of dispensing
5-10min is stirred, scratches clean surface scum.It should be noted that Al-Si intermediate alloys, Fe additives, Mn additives, pure herein
The auxiliary materials such as the Mg aluminium alloy additive common for this field.
As a kind of preferred embodiment of the present invention, in step (b), the melt after dispensing is imported into tilt bed and is stood
Stove is refined, and refining temperature is 710-740 DEG C, refining time 40-50min.
Typical but non-limiting refining temperature is 710 DEG C, 715 DEG C, 720 DEG C, 725 DEG C, 730 DEG C, 735 DEG C or 740 DEG C.
Typical but non-limiting refining time is 40min, 42min, 44min, 45min, 46min, 48min or 50min.
Degasification, slagging-off operation are carried out in refining process to melt, refines gases used purity as 99.99% pure argon.It adopts
With the mode of automatic refining in stove.
As a kind of preferred embodiment of the present invention, surface scum is scratched clean, and stand 30-40min after the completion of refining, melt temperature
Degree control is at 710-720 DEG C.
Typical but non-limiting time of repose be 30min, 32min, 34min, 35min, 36min, 38min or 40min,
Typical but non-limiting melt temperature is 710 DEG C, 712 DEG C, 714 DEG C, 715 DEG C, 716 DEG C, 718 DEG C or 720 DEG C.
Melt after standing is cast.Super large-scale slab ingot casting technique is complicated, wherein melt quality, casting ginseng
Number, equipment state are improper all to cause ingot casting cracking, suspension, leakage aluminium etc. abnormal, directly result in ingot casting cracking, scrap, when serious
Huge explosion will be caused.Therefore it needs to carry out particular determination to casting process.
In casting process, slagging-off operation carries out melt using on-line filtration system and the continuous depassing unit of four rotors and removes
Gas operation.It should be noted that before on-line filtration system and the continuous depassing unit of four rotors is used, needing will be therein remaining
Material is released, and prevents from ingredient being caused to pollute 5A03 aluminium alloys.
In the present invention, on-line filtration system is double-stage filtering system.As a kind of preferred embodiment of the present invention, the twin-stage
Filtration system includes by-pass filtration system and secondary filtration system.By-pass filtration system and secondary filtration system are separately adopted
With the ceramic filter plate of 20PPi-50PPi, the aperture of ceramic filter plate is more than secondary filtration system used by by-pass filtration system
The aperture of ceramic filter plate used by system；
Preferably, by-pass filtration system uses flow as the box filter devices of 40 tons/h, and by-pass filtration system uses 30PPi
Ceramic filter plate；Secondary filtration system uses the box filter devices of 35 tons/h, and secondary filtration system uses the ceramic mistake of 40PPi
Filter plate.
Since 5A03 aluminium alloys are high magnesium alloy, viscosity is high, poor fluidity, therefore by-pass filtration system and secondary filtration
In a certain range that the aperture of ceramic filter plate should limit used by system.
In the present invention, degasification uses the continuous depassing unit of four rotors, and continuous degasification operation is carried out to melt.This device has
Have through the advantages such as flow is big, degassing effect is good, it is domestic at present generally using birotor depassing unit, four rotor depassing units compared with
Birotor depassing unit outgassing rate can improve 50%.
As a kind of preferred embodiment of the present invention, in step (c), the rotor speed in the continuous depassing unit of four rotors
Turn/min for 400-500.Typical but non-limiting rotor speed for 400 turns/min, 420 turns/min, 440 turns/min, 450
Turn/min, 460 turns/min, 480 turns/min or 500 turn/min.
As a kind of preferred embodiment of the present invention, in step (c), the melt after standing is passed sequentially through into by-pass filtration
After system, online refinement machine, the continuous depassing unit of four rotors and secondary filtration system, it is poured into casting crystallizer and is cast.
Discontinuous crystal grain refinement is carried out to melt using online refinement machine.As a kind of preferred embodiment of the present invention, step
Suddenly it is aluminium titanium carbon Al-Ti-C (5Ti-0.2C) grain refiner in (c), used by online refinement machine.Ti in melt is contained
Amount control is in 0.035-0.045%, on-line determination hydrogen content≤0.15ml/100g (Al).
Carbon in aluminium titanium carbon does not generate harmful substance in melt, can not only obtain good≤1 grade of grain structure, and
Aluminum alloy sheets and strips finished product plasticity is good, conducive to purposes such as punching press, bendings.And the aluminium titanium boron wire that domestic manufacturer uses at present carries out
Online refinement can generate more coarse TiB2Phase so as to cause grain coarsening, influences finished product plasticity.
As a kind of preferred embodiment of the present invention, in step (c), casting crystallizer is multifunctional numerical control crystallizer,
Casting crystallizer uses automatic control system for liquid level, and level control is in 50-70mm.
Using above device, the time that melt is stored in casting crystallizer can be effectively reduced, improves cooling velocity, refinement is brilliant
Grain tissue can effectively control low power grain size at≤1 grade.
As a kind of preferred embodiment of the present invention, in step (c), casting temperature is 685-695 DEG C, casting speed control
System is controlled in 45-55mm/min, cooling water flow in 40-80m3/ h, water temperature are 25-35 DEG C；
Preferably, in step (c), casting temperature is 686-695 DEG C, and casting speed is controlled in 46-55mm/min, cooling water
Flow control is in 45-80m3/ h, water temperature are 26-35 DEG C.
Typical but non-limiting casting temperature is 685 DEG C, 686 DEG C, 688 DEG C, 690 DEG C, 692 DEG C, 694 DEG C or 695 DEG C.
Typical but non-limiting casting speed is 45mm/min, 46mm/min, 48mm/min, 50mm/min, 51mm/min, 52mm/
Min, 54mm/min or 55mm/min.Typical but non-limiting cooling water flow is 40m3/h、45m3/h、50m3/h、55m3/
h、60m3/h、65m3/h、70m3/h、75m3/ h or 80m3/h.Typical but non-limiting water temperature for 26 DEG C, 28 DEG C, 30 DEG C, 32
DEG C, 34 DEG C or 35 DEG C.
As a kind of preferred embodiment of the present invention, above-mentioned 5A03 aluminium alloy cast ingots production method includes the following steps：
(a) aluminium alloy scrap and remelting are subjected to melting and dispensing with aluminium ingot；
(b) melt after dispensing is refined, refining temperature is 710-740 DEG C, refining time 40-50min, refining
30-40min is stood after the completion, and melt temperature is controlled at 710-720 DEG C；
(c) by the melt after standing pass sequentially through by-pass filtration system, online refinement machine, the continuous depassing unit of four rotors and
It after secondary filtration system, is poured into casting crystallizer and is cast, obtain the 5A03 aluminium alloys that width is 1250-2850mm and cast
Ingot；Wherein, it is Al-Ti-C grain refiner used by online refinement machine.
By the restriction to processing step each in aforementioned production method and technological parameter, to ensure that aluminium alloy cast ingot has
Good formability and the guarantee for meeting inherent quality requirement.
As a kind of preferred embodiment of the present invention, 5A03 aluminium alloy cast ingots include the member of following mass percentage
Element：Si 0.6-0.7%, Fe 0.3-0.4%, Cu≤0.1%, Mn 0.4-0.5%, Mg3.4-3.6%, Cr≤0.1%, Ti
0.035-0.045%, other impurities element ＜ 0.05%, surplus Al.
By carrying out dispensing with aluminium ingot raw material to aluminium alloy scrap and remelting, to ensure each element in 5A03 aluminium alloy cast ingots
Composition is all in the range of national standard.
As a kind of preferred embodiment of the present invention, the width of 5A03 aluminium alloy cast ingots is 2450-2850mm.
Super large-scale 5A03 aluminium alloy cast ingots prepared by the present invention, wide cut is in 2450-2850mm, thickness and length
It can be identical with conventional 5A03 aluminium alloy cast ingots.
The size (thickness × width × length) of typical but non-limiting 5A03 aluminium alloy cast ingots be, for example, 670mm ×
2450mm × 6200mm, 670mm × 2500mm × 6200mm, 670mm × 2700mm × 6200mm or 670mm × 2850mm ×
6200mm。
According to the second aspect of the invention, a kind of 5A03 aluminium alloy cast ingots are additionally provided, are closed by above-mentioned 5A03 aluminium
Golden ingot casting production method obtains, and the width of the 5A03 aluminium alloy cast ingots is 2400-2850mm, preferably 2450-2850mm, into one
Step is preferably 2500-2850mm.
The typical but non-limiting width of 5A03 aluminium alloy cast ingots for 2400mm, 2450mm, 2500mm, 2550mm,
2600mm, 2650mm, 2700mm, 2750mm, 2800mm or 2850mm.
According to the third aspect of the present invention, above-mentioned 5A03 aluminium alloy cast ingots production method is additionally provided in aluminium alloy cast ingot
In application.
In view of the advantage of above-mentioned 5A03 aluminium alloy cast ingots production method so that the production method is led in aluminum alloy processing technology
Domain has good application, and the industrialized production for super large-scale 5A03 aluminium alloy cast ingots provides foundation.
With reference to specific embodiment and comparative example, the invention will be further described.
Embodiment 1
A kind of 5A03 aluminium alloy cast ingots production method provided in this embodiment, includes the following steps：
(a) aluminium alloy scrap and remelting are packed into smelting furnace with aluminium ingot and carry out melting, aluminium alloy scrap and remelting aluminium ingot
Weight ratio be 0.1:1, it then adds in the auxiliary materials such as Al-Si intermediate alloys, Fe additives, Mn additives, pure Mg and is matched
Material；
(b) melt after dispensing is directed into tilt bed standing furnace to refine, refining temperature is 740 DEG C, refining time
For 40min, surface scum is scratched clean, and stand 30min after the completion of refining, melt temperature is controlled at 720 DEG C；
(c) melt converter after standing is passed sequentially through the continuous degasification of by-pass filtration system, online refinement machine, four rotors to fill
It puts with after secondary filtration system, is poured into casting crystallizer and is cast, casting temperature is 695 DEG C, and casting speed control exists
45mm/min, cooling water flow are controlled in 50m3/ h, water temperature be 30 DEG C, obtain thickness be 670mm, width 2000mm, length
The 5A03 aluminium alloy cast ingots of super large-scale slab ingot for 6200mm；
Wherein, by-pass filtration system uses flow as the box filter devices of 40 tons/h, and by-pass filtration system is using 30PPi's
Ceramic filter plate；Secondary filtration system uses the box filter devices of 35 tons/h, and secondary filtration system uses the ceramic filter of 40PPi
Plate；It is Al-Ti-C grain refiner used by online refinement machine；The rotor speed of the continuous depassing unit of four rotors for 450 turns/
Min or so, casting crystallizer are adjustable-width formula Multi-functional full-aluminum numerical control crystallizer, and casting crystallizer uses automatic liquid surface control
System, level control is in 50mm.
Embodiment 2
A kind of 5A03 aluminium alloy cast ingots production method provided in this embodiment, in addition to aluminium alloy scrap in step (a) and again
The weight ratio of molten aluminium ingot is 1:5, remaining step and technological parameter are same as Example 1.
Embodiment 3
A kind of 5A03 aluminium alloy cast ingots production method provided in this embodiment, in addition to casting speed control exists in step (c)
55mm/min, remaining step and technological parameter are same as Example 1.
Embodiment 4
A kind of 5A03 aluminium alloy cast ingots production method provided in this embodiment, includes the following steps：
(a) aluminium alloy scrap and remelting are packed into smelting furnace with aluminium ingot and carry out melting, aluminium alloy scrap and remelting aluminium ingot
Weight ratio be 1:1, it then adds in the auxiliary materials such as Al-Si intermediate alloys, Fe additives, Mn additives, pure Mg and carries out dispensing；
(b) melt after dispensing is directed into tilt bed standing furnace to refine, refining temperature is 720 DEG C, refining time
For 45min, surface scum is scratched clean, and stand 35min after the completion of refining, melt temperature is controlled at 710 DEG C；
(c) melt converter after standing is passed sequentially through the continuous degasification of by-pass filtration system, online refinement machine, four rotors to fill
It puts with after secondary filtration system, is poured into casting crystallizer and is cast, casting temperature is 690 DEG C, and casting speed control exists
50mm/min, cooling water flow are controlled in 80m3/ h, water temperature be 35 DEG C, obtain thickness be 600mm, width 2400mm, length
The 5A03 aluminium alloy cast ingots of super large-scale slab ingot for 6200mm；
Wherein, by-pass filtration system uses flow as the box filter devices of 40 tons/h, and by-pass filtration system is using 30PPi's
Ceramic filter plate；Secondary filtration system uses the box filter devices of 35 tons/h, and secondary filtration system uses the ceramic filter of 40PPi
Plate；It is Al-Ti-C grain refiner used by online refinement machine；The rotor speed of the continuous depassing unit of four rotors for 480 turns/
Min or so, casting crystallizer are adjustable-width formula Multi-functional full-aluminum numerical control crystallizer, and casting crystallizer uses automatic liquid surface control
System, level control is in 60mm.
Embodiment 5
A kind of 5A03 aluminium alloy cast ingots production method provided in this embodiment, in addition to by-pass filtration system is adopted in step (c)
With the ceramic filter plate of 40PPi, secondary filtration system use the ceramic filter plate of 50PPi, remaining step and technological parameter with
Embodiment 4 is identical.
Embodiment 6
A kind of 5A03 aluminium alloy cast ingots production method provided in this embodiment, includes the following steps：
(a) aluminium alloy scrap and remelting are packed into smelting furnace with aluminium ingot and carry out melting, aluminium alloy scrap and remelting aluminium ingot
Weight ratio be 5:1, it then adds in the auxiliary materials such as Al-Si intermediate alloys, Fe additives, Mn additives, pure Mg and carries out dispensing；
(b) melt after dispensing is directed into tilt bed standing furnace to refine, refining temperature is 710 DEG C, refining time
For 45min, surface scum is scratched clean, and stand 40min after the completion of refining, melt temperature is controlled at 710 DEG C；
(c) melt converter after standing is passed sequentially through the continuous degasification of by-pass filtration system, online refinement machine, four rotors to fill
It puts with after secondary filtration system, is poured into casting crystallizer and is cast, casting temperature is 685 DEG C, and casting speed control exists
45mm/min, cooling water flow are controlled in 40m3/ h, water temperature be 25 DEG C, obtain thickness be 600mm, width 2850mm, length
The 5A03 aluminium alloy cast ingots of super large-scale slab ingot for 6000mm；
Wherein, by-pass filtration system uses flow as the box filter devices of 40 tons/h, and by-pass filtration system is using 30PPi's
Ceramic filter plate；Secondary filtration system uses the box filter devices of 35 tons/h, and secondary filtration system uses the ceramic filter of 40PPi
Plate；It is Al-Ti-C grain refiner used by online refinement machine；The rotor speed of the continuous depassing unit of four rotors for 480 turns/
Min or so, casting crystallizer are adjustable-width formula Multi-functional full-aluminum numerical control crystallizer, and casting crystallizer uses automatic liquid surface control
System, level control is in 60mm.
Comparative example 1
This comparative example be embodiment 1 contrast experiment, in addition in casting process in step (c) only with by-pass filtration system
Slagging-off operation is carried out, not using secondary filtration system, remaining step and technological parameter are same as Example 1.
Comparative example 2
This comparative example is the contrast experiment of embodiment 1, other than in step (c) using two rotor continuous degassing systems,
Remaining step and technological parameter are same as Example 1.
Comparative example 3
This comparative example be embodiment 1 contrast experiment, in addition to online refinement machine in step (c) used by be aluminium titanium boron crystalline substance
Grain fining agent, remaining step and technological parameter are same as Example 1.
Comparative example 4
This comparative example is the contrast experiment of embodiment 6, in addition to the liquid level of the casting crystallizer employed in step (c)
For 80mm, remaining step and technological parameter are same as Example 6.
To verify the effect of embodiment 1-6 and comparative example 1-4, ad hoc following experimental example.
Experimental example 1
Embodiment 1-6 and comparative example 1-4 is measured, is specifically shown in Table 1.Wherein, degree of purity level detection method is according to GB/
T32186-2015, method for detection fault detection is according to GB/T6519-2013.
The performance parameter of the obtained 5A03 aluminium alloy cast ingots of 1 each embodiment and comparative example of table
As can be seen from Table 1, the 5A03 aluminium alloy cast ingot production methods that the present embodiment 1-6 is provided are better than on the whole
The 5A03 aluminium alloy cast ingot production methods of comparative example 1-4.
Embodiment 2 is the control experiment of embodiment 1, and the difference lies in aluminium alloy scrap in step (a) and remeltings for the two
It is different with the weight ratio of aluminium ingot.In general, remelting is more with aluminium ingot dosage, more contribute to control the chemistry of aluminium alloy cast ingot into
Point, required all kinds of metallic additions increase.Aluminium alloy scrap usage amount is more, and required all kinds of alloy additions are accordingly reduced,
Conducive to the utilization of recycling material, cost-effective, reduction energy consumption.
Embodiment 3 is the control experiment of embodiment 1, and the difference lies in the casting speed in step (c) is different for the two.
In a certain range, with the promotion of casting speed, the average crystallite speed of ingot casting increases, the refinement of crystal inner structure.
Embodiment 5 is the control experiment of embodiment 4, and the difference lies in by-pass filtration systems and two in step (c) for the two
Grade filtration system uses the ceramic filter plate of different pore size.The aperture of ceramic filter plate is smaller, is more conducive to impurity in ingot casting and contains
The reduction of amount, so that the flaw detection rank raising of ingot casting.
Comparative example 1-3 is the contrast experiment of embodiment 1.Compared with Example 1, secondary filtration is not used in comparative example 1
System, using two rotor continuous degassing systems in comparative example 2.Secondary filtration system is not used so that the impurity in ingot casting
Content increases, and blocks the continuity of metal phase, and then the flaw detection grade of ingot casting is caused to reduce.With the continuous depassing unit phase of four rotors
Than the degassing efficiency of two rotor continuous degassing systems is poor, increases so as to cause the hydrogen content entered in melt, is also unfavorable for gold
The continuity of symbolic animal of the birth year, so that flaw detection grade declines.
Compared with Example 1, comparative example 3 enters melt using aluminium Ti, B grain graining agent, boron element therein, raw
Into more coarse TiB2Phase so as to cause grain coarsening, influences finished product plasticity.As it can be seen that the present invention is thin using aluminium titanium carbon crystal grain
Agent has better thinning effect.
Comparative example 4 is the contrast experiment of embodiment 6, and the difference lies in the casting crystallines employed in step (c) for the two
The liquid level of device is different.Liquid level is higher, leads to the reduction of its intensity of cooling, so that grain size becomes larger.
In conclusion it processes to obtain by above-mentioned 5A03 aluminium alloy cast ingots production method, obtained 5A03 aluminium alloys casting
On the one hand the width of ingot can meet aerospace, traffic fortune up to 1250-2850mm, the 5A03 aluminium alloy cast ingots of the super large-scale
It is defeated to use Aluminum sheets aluminium alloy use demand, on the other hand it can reduce production cost as blank using the deformation of big specification wide cut, carry
High efficiency and yield rate reduce energy consumption.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe is described in detail the present invention with reference to foregoing embodiments, it will be understood by those of ordinary skill in the art that：Its according to
Can so modify to the technical solution recorded in foregoing embodiments either to which part or all technical features into
Row equivalent replacement；And these modifications or replacement, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of 5A03 aluminium alloy cast ingots production method, which is characterized in that include the following steps：
(a) aluminium alloy scrap and remelting are subjected to melting and dispensing with aluminium ingot；
(b) melt after dispensing is refined, is stood after the completion of refining；
(c) melt after standing is cast, obtains the 5A03 aluminium alloy cast ingots that width is 2400-2850mm；Wherein, it casts
In the process, it is removed the gred, degassing processing, is adopted to the melt after standing using on-line filtration system, the continuous depassing unit of four rotors
It is cast with casting crystallizer, on-line filtration system is double-stage filtering system.
2. 5A03 aluminium alloy cast ingots production method according to claim 1, which is characterized in that in step (a), the aluminium closes
The weight ratio of golden waste material and remelting aluminium ingot is (0.1-10):1.
3. 5A03 aluminium alloy cast ingots production method according to claim 1, which is characterized in that in step (b), after melting
Melt be placed in tilt bed standing furnace and refined, refining temperature is 710-740 DEG C, refining time 40-50min；
Preferably, it scratches clean surface scum after the completion of refining and stands 30-40min, melt temperature is controlled at 710-720 DEG C.
4. 5A03 aluminium alloy cast ingots production method according to claim 1, which is characterized in that in step (c), the twin-stage
Filtration system includes by-pass filtration system and secondary filtration system, and the by-pass filtration system and secondary filtration system are independently
Ground uses the ceramic filter plate of 20PPi-50PPi, and the aperture of ceramic filter plate is more than two level mistake used by by-pass filtration system
The aperture of ceramic filter plate used by filter system；
Preferably, the by-pass filtration system uses the ceramic filter plate of 30PPi, and the secondary filtration system is using 40PPi's
Ceramic filter plate.
5. 5A03 aluminium alloy cast ingots production method according to claim 4, which is characterized in that in step (c), after standing
Melt pass sequentially through by-pass filtration system, online refinement machine, the continuous depassing unit of four rotors and secondary filtration system after, cast
It is cast to casting crystallizer；
Preferably, it is Al-Ti-C grain refiner used by online refinement machine in step (c)；
Preferably, in step (c), the rotor speed in the continuous depassing unit of four rotors turns/min for 400-500；
Preferably, in step (c), casting crystallizer is multifunctional numerical control crystallizer, and the casting crystallizer is automatic using liquid level
Control system, level control is in 50-70mm.
6. 5A03 aluminium alloy cast ingots production method according to claim 1, which is characterized in that in step (c), casting temperature
It it is 685-695 DEG C, casting speed control is controlled in 45-55mm/min, cooling water flow in 40-80m3/ h, water temperature 25-35
℃；
Preferably, in step (c), casting temperature is 686-695 DEG C, and casting speed is controlled in 46-55mm/min, cooling water flow
Control is in 45-80m3/ h, water temperature are 26-35 DEG C.
7. the 5A03 aluminium alloy cast ingot production methods according to claim 1-6 any one, which is characterized in that including following
Step：
(a) aluminium alloy scrap and remelting are subjected to melting and dispensing with aluminium ingot；
(b) melt after dispensing is refined, refining temperature is 710-740 DEG C, refining time 40-50min, and refining is completed
After stand 30-40min, melt temperature is controlled at 710-720 DEG C；
(c) melt after standing is passed sequentially through into by-pass filtration system, online refinement machine, the continuous depassing unit of four rotors and two level
It after filtration system, is poured into casting crystallizer and is cast, obtain the 5A03 aluminium alloy cast ingots that width is 2450-2850mm；Its
In, it is Al-Ti-C grain refiner used by online refinement machine.
8. the 5A03 aluminium alloy cast ingot production methods according to claim 1-6 any one, which is characterized in that the 5A03
Aluminium alloy cast ingot includes the element of following mass percentage：Si 0.6-0.7%, Fe 0.3-0.4%, Cu≤0.1%, Mn
0.4-0.5%, Mg 3.4-3.6%, Cr≤0.1%, Ti 0.035-0.045%, other impurities element ＜ 0.05%, surplus are
Al；
Preferably, the width of the 5A03 aluminium alloy cast ingots is 2450-2850mm.
9. a kind of 5A03 aluminium alloy cast ingots, which is characterized in that cast by the 5A03 aluminium alloys described in claim 1-8 any one
Ingot production method obtains, and the width of the 5A03 aluminium alloy cast ingots is 2400-2850mm, preferably 2450-2850mm, further
Preferably 2500-2850mm.
10. application of the 5A03 aluminium alloy cast ingots production method in aluminium alloy processing described in claim 1-8 any one.
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