CN110484755A - A kind of preparation method of high intensity aluminum foil for household use - Google Patents
A kind of preparation method of high intensity aluminum foil for household use Download PDFInfo
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- CN110484755A CN110484755A CN201910813660.4A CN201910813660A CN110484755A CN 110484755 A CN110484755 A CN 110484755A CN 201910813660 A CN201910813660 A CN 201910813660A CN 110484755 A CN110484755 A CN 110484755A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/40—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling foils which present special problems, e.g. because of thinness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
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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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
Abstract
A kind of preparation method of high intensity aluminum foil for household use, compared with 8006 alloying components, Si and Mn content is constant, Fe is reduced to 1.1~1.2 from 1.4~1.5, Cu is reduced to 0.05 from 0.25, Zn is reduced to 0.02 from 0.25, increase micro Cr and Ti, Al is the aluminium ingot of the electrolytic aluminium liquid containing 80~90 parts by weight and 10~20 parts by weight and purity >=99.7%, the aluminium volume of 3~5mm thickness is prepared by continuous casting and rolling process, roll using cold rolling → slitting trimming → foil → finished product cutting → finished products → inspection packaging prepares high-intensitive aluminum foil for household use, this method saves the processing of 1~2 passage than traditional processing technology, reduce production cost, it is energy-saving and reduce CO2 emission, the production cost of saving has apparent economical Benefit and social benefit.
Description
Technical field
The invention belongs to aluminium foil processing technique field, especially a kind of preparation method of high-intensitive aluminum foil for household use.
Background technique
Aluminum foil for household use is a kind of aluminium foil for being widely used in the fields such as inflight meal, fast food packaging, have it is beautiful, generous, it is clean
Only, the features such as hygienic.
The alloy of common aluminum foil for household use generallys use the wrought aluminium alloy manufacture of 8011 trades mark in the market.Although 8011 alloys
With preferable plastic deformation ability, but intensity, generally between 110~130Mpa, lower intensity causes aluminium foil striking out
It is easy the presence of the defects of deformation, damage after cutlery box, and if to keep the good non-deformability of cutlery box, aluminium must be increased
Foil thickness, causes waste of material.
8006 alloys become the first choice of production aluminum foil for household use with its excellent performance, and 8006 alloys prepare the normal of aluminum foil for household use
It is as follows to advise brief description of the process:
One, melting and casting:
Conventional 8006 alloy castings use direct-cooled casting ingot process, aluminium ingot, the solid when melting using 99.7% or more purity
Waste material and 10~30% electrolytic aluminium liquid are that raw material is put into smelting furnace and carries out melting, at alloying component configuration, aluminum melt
To guarantee its melt quality, the chemical component of melt should meet in national standard GB/T3190-2012 to 8006 alloyings the processes such as reason
The requirement that studies point and referring to following table.
| Si | Fe | Cu | Mn | Mg | Cr | Zn | Ti | Al |
| 0.2~0.3 | 1.4~1.5 | 0.25 | 0.5~0.6 | 0.25 | - | 0.25 | - | Surplus |
Content is weight percentage % in upper table, and it is alloying element that content, which has bound, and what is do not marked in table is other
Impurity content≤0.03.
Melting Control for Kiln Temperature within the scope of 750 ± 5 DEG C, adopt when hereinafter, casting in 0.14ml/100gAl by hydrogen content control
Online degasification is carried out with rotation air blast, filtering uses 30PPi+50PPi double-stage filtering, and alterant uses Al-5Ti-B, and aluminium is molten
Body forms the ingot casting of 400~600mm thickness by mold.
Two, hot rolling:
The ingot casting saw head milling face that above-mentioned founding is processed is reheated again first, 20~25 are kept the temperature under the conditions of 480~520 DEG C
Hour, then by the ingot casting after heating by the roughing mill cogging multi- pass rolling of big processing capacity to 6~8mm thickness and as coils
It is transferred to cold rolling process.
Three, cold rolling:
6~8mm thickness hot rolled coil is cold rolled between 1.0~2.0mm thickness through multi-pass cold rolling, is then moved back among high temperature
Fire continues to be cold rolled to trimming thickness being transferred to slitting trimming process again after cooling.
Four, high temperature intermediate annealing:
High temperature intermediate annealing process is to keep the temperature 20~25 hours under the conditions of 530~560 DEG C.
Five, slitting trimming:
Each deflector roll in guide passage must be wiped when slitting trimming clearly, wipes each deflector roll clearly with alcohol or acetone, it is ensured that aluminium volume
Surface cannot have mark, viscous aluminium, scratch, scuffing, and end face is not allow for burr, tower-shaped, scollop, scallop, the small broken sea of edge etc., intermediate
Trimming staggered floor is necessarily less than 2mm, tower-shaped to be less than 5mm.
Six, foil rolls:
By several passes to finishing pass, aluminium foil surface is not allow for residual greasy dirt；Surface is not allow for elongated
Or it discontinuity scratch, scratches, the surface defect that any influence such as periodical mark, bright wisp and bright band, hidden item, informal voucher use.
Seven, finished product is cut:
Each deflector roll in guide passage must be wiped when cutting clearly, wipes each deflector roll clearly with alcohol or acetone；Ensure that aluminium rolls up surface
Cannot there are mark, viscous aluminium, scratch, scuffing.The aluminium volume of cutting is placed on floor and must be padded with one block of big cardboard, does not allow directly to fall
Ground.Burr, tower-shaped, scollop, scallop, the small broken sea of edge etc. are not allow for when cutting, cutting staggered floor is necessarily less than 0.5mm.After cutting
Rouleau end face must be clean, clean and tidy；The rouleau lot number and specification cut must write on the surface of aluminium volume with marking pen.
Eight, finished products；
When finished products with the sealing of high temperature resistant aluminum foil and adhesive tape ensure cannot after loose layer can stock shelf shove charge anneal.0.01~
0.02mm thickness, the negative pressure heat preservation 20~30 hours under the conditions of 200~240 DEG C.Material is unable to blanking rack after annealing is come out of the stove.After annealing
Material completely cold must turn time process.
Nine, it checks and packs；
Mainly check that aluminum foil thickness, width must not exceed the margin of tolerance when finished product inspection, end face must not jagged, flange,
It wounds, staggered floor must not exceed 0.5mm.Compliant sleeve, material have to comply with customer requirement, and sleeve both sides stretch out aluminium foil end face and are respectively
5mm.It is required that accomplishing that tensile strength reaches 125~155Mpa, according to the packing instructions packet of aluminum foil for household use after elongation percentage >=2% qualification
Dress.
8006 alloys prepare house and can achieve 125Mpa or more Yong the tensile strength of Lv Be, but that there are production processes is more, raw
The problems such as production period is long, at high cost.
How shortening production process on the basis of above-mentioned preparation method, reducing the production cycle, reduce cost is aluminum foil for household use
Important subject, but yet there are no relevant report up to now.
Summary of the invention
To solve the above problems, the present invention provides a kind of preparation method of high-intensitive aluminum foil for household use, the preparation method is first
Micro improvement has been carried out to the ingredient of 8006 alloys, has been rolled up by the aluminium that 3~5mm thickness is born in continuous casting and rolling preparation, then pass through cold rolling
It is rolled with intermediate annealing, foil and the reasonable technical parameter of the processes such as finished products is arranged, substantially reduced process flow, reduce life
It produces the period, reduce production cost, its tensile strength >=125Mpa of the high-intensitive aluminum foil for household use prepared and elongation percentage >=2%.
In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical scheme:
A kind of preparation method of high intensity aluminum foil for household use, the preparation method have carried out micro improvement on 8006 alloy bases
And aluminum melt is prepared, it is rolled up by the aluminium that continuous casting and rolling process prepares 3~5mm thickness, using cold rolling → slitting trimming → foil
Roll → finished product cutting → finished products → inspection packaging prepares high-intensitive aluminum foil for household use, wherein slitting trimming, finished product cutting and
Check that packaging is carried out by 8006 alloy common process, it is characterized in that:
(1) aluminum melt is prepared:
The aluminium ingot of the electrolytic aluminium liquid of 80~90 parts by weight and 10~20 parts by weight and purity >=99.7% is put into together molten
Carry out melting in furnace and prepare aluminum melt, melting Control for Kiln Temperature within the scope of 750 ± 5 DEG C, when melting the chemistry of aluminum melt at
Lease making detection should meet following table requirement,
| Si | Fe | Cu | Mn | Mg | Cr | Zn | Ti | Al |
| 0.2~0.3 | 1.1~1.2 | 0.05 | 0.5~0.6 | 0.01 | 0.01 | 0.02 | 0.02~0.03 | Surplus |
Al in upper table carries out chemical component detection, content when first being matched and detected by weight by weight percentage
Having bound is alloying element, other impurity content≤0.03 not marked in table, and fusion process requires degasification, slagging-off clean
And it stirs to guarantee aluminum melt quality；
(2) 3~5mm thickness aluminium volume is prepared by continuous casting and rolling:
By the bast mouth that is process by inorganic non-metallic material resistant to high temperature by aluminum melt equivalent, note at the uniform velocity when continuous casting
In the steel band for entering two opposite direction rotatings, and it is connected on the outside of two steel bands with recirculated cooling water, the heat in aluminum melt passes through steel
Band and cooling water are pulled away, and the temperature of aluminum melt is controlled at 685 ± 10 DEG C when continuous casting and its casting speed is controlled in 8~11m/
Min, the slab thickness of casting are controlled in 19 ± 1mm, it is desirable that by adjusting cooling water pressure and flow to ensure slab temperature
Control is at 520~580 DEG C；
The slab of continuous casting is directly entered three tandem mills and is lubricated and is cooled down using emulsion, the processing of the first passes
Rate control 50~60% and rolling inlet temperature control at 420~500 DEG C and the control of its outlet temperature at 360~420 DEG C, the
Two passes working moduluses control 25~35% and rolling inlet temperature control at 330~390 DEG C and its outlet temperature control
At 290~360 DEG C, the control of third pass reduction 20~33% and inlet temperature control at 250~320 DEG C its outlet temperature
Degree control prepares 3~5mm thickness aluminium volume at 220~250 DEG C, through the processing of third passage；
(3) cold rolling:
Continuous casting and rolling prepare directly upper cold mill complex after 3~5mm thickness aluminium volume carry out each passage cold rolling and roll out 0.4~
The allocation plan of 0.5mm cold rolling coil, each passage cold rolling is as follows:
3.0~5.0mm → 2.0~3.5mm → intermediate annealing → 1.0~2.0mm → 0.6~1.1mm → 0.4~0.7mm
→ trimming → tempering；
Wherein:
3.0~5.0mm → 2.0~3.5mm cold rolling pass working modulus controls remaining each cold rolling road between 35~45%
Secondary working modulus control is 40~45%；
The cold rolling coil of 2.0~3.5mm thickness is first put into annealing furnace when intermediate annealing, furnace temperature is raised to 220 with 2h later
DEG C when keep the temperature 4h, 10~20h is kept the temperature when furnace temperature being then raised to 580 DEG C with 4h, keeps the temperature 5h when furnace temperature then being dropped to 530 DEG C,
It comes out of the stove when furnace temperature finally being dropped to 170 DEG C；
The cold rolling coil of 0.4~0.7mm thickness is first put into annealing furnace when tempering, when furnace temperature being raised to 240 DEG C with 2h later
4h is kept the temperature, 10~20h is kept the temperature when furnace temperature being then raised to 380 DEG C with 3h, 5h is kept the temperature when furnace temperature then being dropped to 330 DEG C, finally
It comes out of the stove when furnace temperature is dropped to 170 DEG C；
Cold rolling coil after above-mentioned intermediate annealing and tempering needs air-cooled to 60 DEG C or less to be transferred to subsequent each passes again, intermediate
The end face situation of 2.0~3.5mm thickness cold rolling coil should be checked when annealing and check end socket whether use high temperature gummed tape, whether securely,
Volume phenomenon whether is touched between each cold rolling coil, finally checks whether be stained with aluminium end on the circulated air hood of stove and whether remove dry
It only just can be into furnace annealing；
The process of above-mentioned each cold rolling pass is required to be lubricated and cooled down using ROLLING OIL, pays attention to wiping clearly each in guide passage
Root deflector roll has mark, viscous hurts defect to prevent surface of aluminum plate；
(4) foil rolls:
The cold rolling coil of 0.4~0.7mm thickness is subjected to foil and rolls and prepare 0.01~0.03mm aluminium foil, point that each passage foil rolls
It is as follows with scheme:
0.4~0.7mm → 0.2~0.5mm → 0.1~0.2mm → 0.05~0.09mm → 0.02~0.05mm → 0.01
~0.03mm；
Above-mentioned each passage foil must replace working roll when rolling, and each of clear wiping guide passage roller, supporting stick surface is not all right
Support roller must be replaced, ROLLING OIL must be clean, when especially being rolled up to 0.02~0.05 thick aluminum foil its surface must purge it is clean and
Be not allow for residual greasy dirt, and surface be not allow for the scratch of elongated or discontinuity, scratch, periodical mark, bright wisp or bright band,
The surface defect that hidden item, informal voucher and any influence use；
(5) finished products:
0.01~0.03mm thick aluminum foil is rolled into and carries out finished products in annealing furnace, furnace temperature is first raised to 210 DEG C with 4h
Shi Baowen 20h, simultaneously cooled to room temperature of coming out of the stove when furnace temperature then being dropped to 170 DEG C；
The end face situation of 0.01~0.03mm thick aluminum foil volume should be checked when finished products, check whether end socket uses high-temp glue
Volume phenomenon whether is touched between band, whether secured, each aluminum foil coil, checks whether be stained with aluminium foil on the circulated air hood of stove and be
No remove completely just can be into furnace annealing；
0.01~0.03mm thick aluminum foil volume after finished products just becomes aluminum foil for household use, it is desirable that the tension of the aluminum foil for household use
Intensity >=125Mpa, elongation percentage >=2%.
Due to using technical solution as described above, the present invention generates following good effect:
1, when melting of the present invention using the electrolytic aluminium liquid of 80~90% parts by weight and 10~20% parts by weight and aluminium purity >=
99.7% aluminium ingot, which is put into together in smelting furnace, carries out melting, while by the tire packet refining techniques of high-temperature electrolysis molten aluminum and changing
Into the refinery practice in smelting furnace, for example, increase time of repose, the short time repeatedly refines etc., and techniques ensure that aluminum melt quality, from
And it realizes and continuous casting and rolling volume abbreviated system is directly produced using electrolytic aluminium liquid.
2, continuous casting and rolling uses Ha Ziliete continuous casting and continuous rolling mill, and aluminum melt is directly passed through Ha Ziliete continuous casting and rolling mechanism
Standby 3~5mm thickness aluminium is rolled up, and the big plate ingot casting of traditional hot rolled alloy, ingot blank are eliminated compared with traditional direct-cooled slab hot-rolling technique
Saw head milling face reheats again, the multiple tracks link such as the roughing mill split rolling method of big processing capacity, energy-saving and reduce carbon dioxide
The production cost of discharge, saving has apparent economic benefit and social benefit.
3, the present invention is in carrying out when continuous casting and rolling 3~5mm thickness aluminium to be rolled up to cold rolling a time to 2~3.5mm thickness cold rolling coil
Between anneal, cold rolling coil carries out remaining each passes again after intermediate annealing, and this method saves 1~2 passage than traditional processing technology
Processing, reduces production cost.
Specific embodiment
The present invention is a kind of preparation method of high-intensitive aluminum foil for household use, and related preparation method is referring to the technical solution, no
Separately repeat.
But needs are described as follows:
1, the present invention is rolled up by the aluminium that continuous casting and rolling process prepares 3~5mm thickness, using cold rolling → slitting trimming → foil
Roll → finished product cutting → finished products → inspection packaging prepares high-intensitive aluminum foil for household use, wherein slitting trimming, finished product cutting and
Check that the common process of 8006 alloys in packaging background technique carries out.
2, the present invention is compared with 8006 alloying components, Si and Mn content is constant, and Fe is reduced to 1.1~1.2 from 1.4~1.5,
Cu is reduced to 0.05, Zn from 0.25 and is reduced to 0.02 from 0.25, increases micro Cr and Ti, and the micro addition of Cr and Ti are advantageous
Guarantee the tensile strength and elongation percentage of aluminium foil in following process in aluminum melt, while guaranteeing the brightness and inoxidizability of aluminium foil
Can, the casting and secondary remelting process of aluminium ingot are eliminated compared with common process, through calculating: molten aluminum can be reduced and cast aluminium ingot mistake
The scaling loss of 0.4~0.5% aluminium damage and 2~4% aluminium during aluminium ingot secondary remelting, has saved the energy, has improved life in journey
Produce efficiency and yield rate.
It itself constitutes secondly, micro increase and decrease in the above-mentioned aluminium alloy trade mark between each element is not only perfect, also will necessarily
The micro variation of subsequent each process machined parameters, such as cold rolling speed, intermediate anneal temperature, foil is caused to roll speed, finished products
Temperature etc., the micro variation of these machined parameters are because the component of aluminium alloy changes and changes, rather than passes through limited times
Obtained from experiment.
3, conventional household with 8006 alloy aluminium foils is rolled down to the hot rolling material of 6~8mm thickness between 1.0~2.0mm thickness, so
Intermediate annealing afterwards, trimming turns foil rolling when being finally rolled down to base material thickness.And the present invention is by continuous casting and rolling 3~5mm thickness aluminium
Intermediate annealing is carried out when rolling up cold rolling a time to 2~3.5mm thickness cold rolling coil, cold rolling coil carries out remaining each passage again after intermediate annealing
Rolling, this method are saved 1~2 passage than traditional processing technology and are processed, and production cost is reduced.
4, three tandem mills that continuous casting and rolling of the invention uses are Ha Ziliete continuous casting and continuous rolling mill, Ha Ziliete continuous casting and rolling
Machine is that one kind can implement continuous casting but also implement the unit of three companies cold rolling, and aluminum melt is directly passed through Ha Ziliete continuous casting and continuous rolling mill
3~5mm thickness aluminium volume is prepared, the big plate ingot casting of traditional hot rolled alloy, ingot are eliminated compared with traditional direct-cooled slab hot-rolling technique
Base saw head milling face reheats again, the multiple tracks link such as the roughing mill split rolling method of big processing capacity, energy-saving and reduce titanium dioxide
The production cost of carbon emission, saving has apparent economic benefit and social benefit.
5, it is for improving that the continuous casting and rolling in the present invention, cold rolling, foil, which are rolled with each parameter setting in finished products process,
Aluminum melt ingredient and specially design, since micro change has occurred in addition using Ha Ziliete continuous casting and rolling in aluminum melt ingredient
Machine, therefore each cold rolling pass and working modulus will also change therewith, it cannot be by parameter setting each in each process and process
Isolated to separate to evaluate, each parameter setting in each process is that the entirety for being directed to aluminum melt ingredient of the invention and constituting is matched
Set, each parameter setting in each process be it is indispensable, individually evaluate a certain parameter setting and lack scientific and integrality, this
Point is particularly important.
Following table is a kind of displaying of aluminum melt ingredient；
| Si | Fe | Cu | Mn | Mg | Cr | Zn | Ti | Al |
| 0.25 | 1.15 | 0.05 | 0.55 | 0.01 | 0.01 | 0.02 | 0.025 | Surplus |
Al in upper table is the electrolytic aluminium liquid containing 80~90 parts by weight and 10~20 parts by weight and purity >=99.7%
Aluminium ingot notices that electrolytic aluminium liquid and aluminium ingot are matched by weight, but the ingredient of aluminum melt is to carry out by weight percentage
Detection, it is put into progress melting in smelting furnace together and prepares aluminum melt, other not described contents are referring to the technical solution.
The reference technique of slitting trimming is as follows:
Each deflector roll in guide passage must be wiped when slitting trimming clearly, wipes each deflector roll clearly with alcohol or acetone, it is ensured that aluminium volume
Surface cannot have mark, viscous aluminium, scratch, scuffing, and end face is not allow for burr, tower-shaped, scollop, scallop, the small broken sea of edge etc., intermediate
Trimming staggered floor is necessarily less than 2mm, tower-shaped to be less than 5mm.
The reference technique of finished product cutting is as follows:
Thick foil must wipe clearly each deflector roll in guide passage when cutting cutting, wipe each deflector roll clearly with alcohol or acetone；Ensure aluminium
Volume surface cannot have mark, viscous aluminium, scratch, scuffing, and end face is not allow for burr, tower-shaped, scollop, scallop, the small broken sea of edge etc., in
Between trimming staggered floor be necessarily less than 2mm.It is hanging that the aluminium of cutting is involved in frame, does not allow directly to land.Pay attention to checking aluminium foil table when cutting
Whether there is or not greasy dirt, surfaces must not be sent to annealing operation with greasy dirt in face.
Burr, tower-shaped, scollop, scallop, the small broken sea of edge etc. are not allow for when cutting, cutting staggered floor is necessarily less than 0.5mm.Point
Rouleau end face after cutting must be clean, clean and tidy；The rouleau lot number and specification cut must write with chalk on the surface of aluminium volume；Point
The examination paper cut must be secured with three high temperature foil tape seals, prevents annealing loose.
Check that the reference technique of packaging is as follows:
Mainly check that aluminum foil thickness, width must not exceed the margin of tolerance when finished product inspection, end face must not jagged, flange,
It wounds, staggered floor must not exceed 0.5mm.Compliant sleeve, material have to comply with customer requirement, and sleeve both sides stretch out aluminium foil end face and are respectively
5mm.It is packed after passed examination according to the packing instructions of household aluminium foil.
The technical solution or embodiment selected herein for the open purpose of the present invention, are presently considered to be suitable
, it should be appreciated that: the present invention is intended to include all changes that all belong to the embodiment in this design and the scope of the invention
Change and improves.
Claims (1)
1. a kind of preparation method of high intensity aluminum foil for household use, the preparation method have carried out micro improvement simultaneously on 8006 alloy bases
Aluminum melt is prepared, is rolled up by the aluminium that continuous casting and rolling process prepares 3~5mm thickness, is rolled using cold rolling → slitting trimming → foil
→ finished product cutting → finished products → inspection packaging prepares high-intensitive aluminum foil for household use, wherein slitting trimming, finished product cutting and inspection
Packaging is looked into carry out by 8006 alloy common process, it is characterized in that:
(1) aluminum melt is prepared:
The aluminium ingot of the electrolytic aluminium liquid of 80~90 parts by weight and 10~20 parts by weight and purity >=99.7% is put into smelting furnace together
Aluminum melt is prepared in middle progress melting, and melting Control for Kiln Temperature is within the scope of 750 ± 5 DEG C, the chemical component warp of aluminum melt when melting
Detection should meet following table requirement,
Chemical component detection is carried out when Al in upper table is first matched by weight and detected by weight percentage, on content has
Lower limit is alloying element, other impurity content≤0.03 not marked in table, and fusion process requires degasification, slagging-off completely and fills
Divide and stirs evenly to guarantee aluminum melt quality；
(2) 3~5mm thickness aluminium volume is prepared by continuous casting and rolling:
Injection two when continuous casting by the bast mouth that is process by inorganic non-metallic material resistant to high temperature by aluminum melt equivalent, at the uniform velocity
In the steel band of root opposite direction rotating, and be connected on the outside of two steel bands with recirculated cooling water, the heat in aluminum melt pass through steel band and
Cooling water is pulled away, when continuous casting the temperature of aluminum melt control at 685 ± 10 DEG C and the control of its casting speed in 8~11m/min, casting
The slab thickness made is controlled in 19 ± 1mm, it is desirable that is existed by adjusting the pressure and flow of cooling water with ensuring that slab temperature controls
520~580 DEG C；
The slab of continuous casting is directly entered three tandem mills and is lubricated and is cooled down using emulsion, the first passage Reduction by rolling control
System 50~60% and rolling inlet temperature control at 420~500 DEG C and its outlet temperature control at 360~420 DEG C, second
The control of secondary Reduction by rolling 25~35% and rolling inlet temperature control at 330~390 DEG C and the control of its outlet temperature 290
~360 DEG C, third pass reduction control 20~33% and inlet temperature control its outlet temperature control at 250~320 DEG C
System prepares 3~5mm thickness aluminium volume at 220~250 DEG C, through the processing of third passage；
(3) cold rolling:
Continuous casting and rolling prepare directly upper cold mill complex after 3~5mm thickness aluminium volume carry out each passage cold rolling and roll out 0.4~
The allocation plan of 0.5mm cold rolling coil, each passage cold rolling is as follows:
~0.7mm → is cut for 3.0~5.0mm → 2.0~3.5mm → intermediate annealing → 1.0~2.0mm → 0.6~1.1mm → 0.4
Side → tempering；
Wherein:
3.0~5.0mm → 2.0~3.5mm cold rolling pass working modulus controls between 35~45%, remaining each cold rolling pass adds
Work rate is controlled 40~45%；
The cold rolling coil of 2.0~3.5mm thickness is first put into annealing furnace when intermediate annealing, when furnace temperature being raised to 220 DEG C with 2h later
4h is kept the temperature, 10~20h is kept the temperature when furnace temperature being then raised to 580 DEG C with 4h, 5h is kept the temperature when furnace temperature then being dropped to 530 DEG C, finally
It comes out of the stove when furnace temperature is dropped to 170 DEG C；
The cold rolling coil of 0.4~0.7mm thickness is first put into annealing furnace when tempering, heat preservation when furnace temperature being raised to 240 DEG C with 2h later
4h keeps the temperature 10~20h when furnace temperature being then raised to 380 DEG C with 3h, 5h is kept the temperature when furnace temperature then being dropped to 330 DEG C, finally by furnace
It comes out of the stove when temperature drop is to 170 DEG C；
Cold rolling coil after above-mentioned intermediate annealing and tempering needs air-cooled to 60 DEG C or less to be transferred to subsequent each passes, intermediate annealing again
When should check the end face situation of 2.0~3.5mm thickness cold rolling coil and check whether end socket uses high temperature gummed tape, whether secured, each cold
It rolls and whether touches volume phenomenon between volume, finally check whether be stained with aluminium end on the circulated air hood of stove and whether remove completely
It can be into furnace annealing；
The process of above-mentioned each cold rolling pass is required to be lubricated and cooled down using ROLLING OIL, notices that each wiped clearly in guide passage is led
Roller has mark, viscous hurts defect to prevent surface of aluminum plate；
(4) foil rolls:
The cold rolling coil of 0.4~0.7mm thickness is subjected to foil and rolls and prepare 0.01~0.03mm aluminium foil, the distribution side that each passage foil rolls
Case is as follows:
0.4~0.7mm → 0.2~0.5mm → 0.1~0.2mm → 0.05~0.09mm → 0.02~0.05mm → 0.01~
0.03mm；
Above-mentioned each passage foil must replace working roll when rolling, and each of clear wiping guide passage roller, supporting stick surface is not all right necessary
Support roller is replaced, ROLLING OIL must be clean, its surface must purge clean and not permit when especially rolling up to 0.02~0.05 thick aluminum foil
Permitted have residual greasy dirt, and surface is not allow for the scratch of elongated or discontinuity, scratches, is periodical mark, bright wisp or bright band, hidden
The surface defect that item, informal voucher and any influence use；
(5) finished products:
0.01~0.03mm thick aluminum foil is rolled into and carries out finished products in annealing furnace, guarantor when furnace temperature being first raised to 210 DEG C with 4h
Warm 20h, simultaneously cooled to room temperature of coming out of the stove when furnace temperature then being dropped to 170 DEG C；
Should be checked when finished products 0.01~0.03mm thick aluminum foil volume end face situation, check end socket whether use high temperature gummed tape,
Whether touch volume phenomenon between whether secured, each aluminum foil coil, check whether be stained on the circulated air hood of stove aluminium foil and whether
Removing completely just can be into furnace annealing；
0.01~0.03mm thick aluminum foil volume after finished products just becomes aluminum foil for household use, it is desirable that the tensile strength of the aluminum foil for household use
>=125Mpa, elongation percentage >=2%.
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