CN103436746A - Special rare earth-containing aluminum alloy foil for pole tab and preparation method of special rare earth-containing aluminum alloy foil - Google Patents
Special rare earth-containing aluminum alloy foil for pole tab and preparation method of special rare earth-containing aluminum alloy foil Download PDFInfo
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Abstract
The invention discloses special rare earth-containing aluminum alloy foil for a pole tab and a preparation method of the special rare earth-containing aluminum alloy foil. An aluminum alloy comprises ferrum, silicon, rare earth, cuprum, zinc, titanium, manganese, magnesium, and the balance of aluminum and unavoidable impurities. The preparation method of the aluminum alloy foil comprises the steps of batching, melting, stirring, refining, standing, degassing, slag removal, filtration deslagging, continuous cast rolling, cold rolling, recrystallization annealing, foil rolling, slitting and second annealing. The foil is low in production cost; the produced special rare earth-containing aluminum alloy foil for the pole tab has good formability and excellent mechanical properties, is uniform in formation, low in aeolotropy, high in strength, good in ductility, uniform in thickness and good in straightness and has few metallurgical defects; the surface of the foil is smooth, clean, even, and free from color difference, stripes, oil patches, impression, ruffles and the like; the end face of the foil is tidy, and free from burrs, cross layers, turriform and the like; and the foil is stable and reliable in quality.
Description
Technical field
The present invention relates to aluminum alloy materials and aluminium alloy foil material processing technique field, be specifically related to special-purpose rare-earth containing aluminium Alloy Foil of a kind of lug and preparation method thereof.
Background technology
Lug is a kind of starting material of lithium ion polymer battery product.Battery of mobile phone, Bluetooth battery, Notebook Battery etc. all need to use lug.Battery is a minute positive and negative electrode, and lug is exactly the metallic conductor from battery core, positive and negative electrode extracted, and generally, is exactly the point of contact of ear when being discharged and recharged of battery positive and negative polarities.This point of contact is a kind of connection of inside battery.In prior art, lug is divided into three kinds of materials, and the positive pole of battery is used aluminium (Al) material, negative pole is used nickel (Ni) material, and negative pole also has and uses copper nickel plating (Ni-Cu) material, and lug is to be composited by film and above-mentioned metal strip two portions.
The lug aluminium foil is exactly the material of producing the lug positive pole, i.e. the aluminium electrical conductor of lithium ion polymer battery product.The quality of aluminium conductor electrical property, be directly connected to the waste of electric energy in course of conveying.Therefore, each state all attaches great importance to the electrical property that how further improves aluminium conductor.
Domestic aluminium foil major part is produced by the continuous casting and rolling method.Not only cost is lower for the aluminum foil stock that in prior art, the continuous casting and rolling method is produced, and the blank quality also can meet the requirement that aluminium foil is produced substantially.But along with the raising of user to the aluminium foil quality requirement, aluminium foil manufacturing enterprise is also more and more higher to the requirement of aluminum foil stock quality, guarantee the requirement of lug aluminium foil high conductivity and strong mechanical performance, must at first guarantee the quality of lug aluminum foil stock, to guarantee cast-rolling stock metal high purity, surface quality is excellent, the size precision tolerance is less, its secondary plates shape is smooth, and particularly the same plate of Casting Rolled Sheet is horizontal, vertically poor and horizontal convexity rate all must not be greater than 1% of thickness of slab.Therefore need to fundamentally improve the preparation quality of the electrical conductor lug aluminium foil of lithium ion polymer battery product.
Summary of the invention
The object of the invention is to solve problems of the prior art, design the special-purpose rare-earth containing aluminium Alloy Foil of a kind of lug of the electrical conductor for the lithium ion polymer battery product, this alloy foil improved combination properties is obvious, intensity, plasticity all increase, and foil homogeneous microstructure, chemical composition narrow range, excellent property, surfacing are consistent without wave, color and luster.
For achieving the above object, technical scheme of the present invention is to provide the special-purpose rare-earth containing aluminium Alloy Foil of a kind of lug, it is characterized in that, in described aluminium alloy, contain silicon, the 0.05 ~ 0.10wt% of iron, 0.05 ~ 0.10 wt % of 0.10 ~ 0.30wt% rare earth, be less than or equal to 0.05wt % copper, be less than or equal to 0.05wt% zinc, be less than or equal to 0.05wt% titanium, be less than or equal to 0.03wt% manganese, be less than or equal to the magnesium of 0.03wt%, remaining content is aluminium and inevitable impurity.
Wherein preferred technical scheme is, in described aluminium alloy, contain iron, 0.05 ~ 0.08% silicon, the 0.05 ~ 0.08wt% of 0.20 ~ 0.25wt% rare earth, be less than or equal to 0.03 wt % copper, be less than or equal to 0.01wt% zinc, be less than or equal to 0.03wt% titanium, be less than or equal to 0.01wt% manganese, be less than or equal to the magnesium of 0.01wt%, remaining content is aluminium and inevitable impurity.
The present invention also provides the preparation method of the special-purpose rare-earth containing aluminium Alloy Foil of a kind of lug, it is characterized in that, described preparation method comprises following procedure of processing:
S1: by the described proportioning configuration of claim 1 or 2 raw material, the smelting furnace of packing into fusing;
S2: the raw material after fusing is stirred, skims, adjusts material composition and refining treatment;
S3: the melt after refining is proceeded in standing furnace and carries out degasification impurity removing refining and standing processing again;
S4: the melt after secondary refining is processed is filled with continuously the rotation degasification tank and carries out the degasification processing of skimming;
S5: the melt that will skim after processing carries out filter cleaner through the micron order two channels twin-stage ceramic filter plate of filter box;
S6: gained melt after filter cleaner is delivered in front case continuously, and the connection cross gate is arranged at front case bottom, and melt injects the feed mouth between the Casting Roller of two rotations that are positioned at casting and rolling machine through cross gate, roll into the casting volume;
S7: the casting of S6 gained is rolled up through repeatedly being cold-rolled to thickness 0.38 ~ 0.65mm;
S8: S7 gained aluminium coiled material is carried out to the middle perfect recrystallization annealing of furnace gas temperature control method, shove charge during in furnace temperature≤100 ℃, then be raised to furnace temperature 450 ℃, be incubated 10 hours; With 2 hours, furnace temperature is dropped to 360 ℃ again, the air cooling of coming out of the stove after this temperature is incubated 6 hours;
S9: paper tinsel rolls, and the aluminium foil after annealing in S8 further is rolling to the special-purpose rare-earth containing aluminium Alloy Foil of lug finished product desired thickness;
S10: S9 gained aluminium foil is cut, and the mechanical property requirements different according to the user carried out finished products for the second time to the finished product of cutting.
Wherein, preferred technical scheme is that in described S1, the smelting furnace smelting temperature is 720 ~ 760 ℃.
Preferred technical scheme can also be, in described S2 in smelting furnace the refining temperature to melt degasification removal of impurities be 740 ~ 750 ℃, described refining treatment periodically passes into high pure nitrogen for adopting from the gas permeable brick at the bottom of smelting furnace in stove.
Preferably technical scheme can also be, the melt temperature that described S3 transfer enters standing furnace is 730 ~ 760 ℃, and in standing furnace, refining temperature is 740 ~ 750 ℃.
Preferred technical scheme can also be that in described S6, front case liquid level is 16 ± 1mm; Casting and rolling machine alloy teeming temperature is 690 ~ 695 ℃, and roll is 58 ~ 62mm; Roll casting speed is 1000 ~ 1200mm/min; Rolling load is 330 ~ 430t; The cooling employing water-cooling pattern of casting, cooling intensity is that inlet water temperature is lower than 30 ℃, hydraulic pressure 3 ~ 5kg/cm2.
Preferably technical scheme can also be, in described S1, total input amount of fine aluminium waste material is not more than 20wt%, and wherein secondary fine aluminium waste material is not more than 10wt%, and the virgin aluminium ingot input amount is not less than 80%.
Preferred technical scheme can also be that in described S7, the cold roll convexity is: top roll 0.02mm, lower roll are plain-barreled roll; In S9, the paper tinsel roll crown is: top roll 0.06mm, lower roll 0.06mm; Paper tinsel rolls the cooling employing oil cooling of technique of roller heat convex degree learning and the mode of the cooling combination of roller.
Preferred technical scheme can also be, in described S7 rolling be five to six times cold rolling, respectively aluminium alloy casting rolling is made to 3.3mm, 2.8mm, 1.8mm, 1.1mm, aluminium alloy cold rolling coil that 0.65mm, 0.38mm are thick.
Advantage of the present invention and beneficial effect are:
1, silicon electrical property of serious harm aluminium not only in this aluminium alloy has the tendency that causes casting hot tearing and processing crackle simultaneously, and iron can generate compound formation α (Al with silicon
12fe
3si
2) phase and β (Al
9fe
3si
2) phase; The present invention is controlled sila matter and iron level in alloy foil, has dwindled crystallization range, and alloy crack proneness significantly descends, and can also prevent from texture of coarse crystal occurring after aluminium alloy annealing;
2, in alloy foil, titanium adds in molten aluminium with the continuous shaft-like form of Al-5Ti-1B alloy, forms Al
3ti and TiB
2the phase compound, the non-spontaneous core while becoming crystallization, play the refinement Microstructure of roll casting; In the recrystallization annealing process, play the effect of secondary recrystallization grain nucleation, the raising of favourable alloy plasticity;
3, rare earth element joins in aluminium alloy as surface active element, not only play the effect of microalloying, and can with gas and the much nonmetal stronger avidity that has such as hydrogen, can generate the compound that fusing point is high, there is certain dehydrogenation, purify the effect of melt; Simultaneously, Rare-Earth Element Chemistry is active strong, can on the second-phase interface of growing up, optionally adsorb, and hinders the second-phase growth, and result causes second-phase rotten.Rare earth element adds in commercial-purity aluminium, can reduce the solid solubility of silicon, changes the distribution of impurity, makes As-cast Microstructure obtain refinement, has reduced the scattering to conduction electron, improves the conductivity 3 ~ 7% of aluminium alloy, and makes the resistance alloys rate reduce more than 2%.The improvement of rare earth element alloy tissue and the rare earth compound of disperse have strong precipitation strengthening effect, can cause crack initiation position and expansion approach in the aluminium alloy breaking-down process to change, and therefore can improve intensity, plasticity and the toughness of aluminium alloy;
4, interalloy component of the present invention and preparation method can guarantee the serialization that realizes that casting is produced, production cost is low, the special-purpose rare-earth containing aluminium Alloy Foil of lug has good plasticity and good mechanical property, and its homogeneous microstructure, metallurgical imperfection is few, anisotropy is little, intensity is higher, ductility is good, even thickness, good straightness degree; Its any surface finish, smooth, no color differnece, without striped, without oil mark, without impression and lace etc.; Its end face is neat, without burr, without the string layer, without turriform etc., steady quality is reliable.
Embodiment
Below in conjunction with embodiment, the specific embodiment of the present invention is further described.Following examples are only for technical scheme of the present invention more clearly is described, and can not limit the scope of the invention with this.
Embodiment 1
Embodiment 1 is the special-purpose rare-earth containing aluminium Alloy Foil of 0.08mm * 240mm H18 lug
The special-purpose rare-earth containing aluminium Alloy Foil specific chemical composition of lug (massfraction) is: Fe:0.22 wt %, Si:0.06 wt %, RE(rare earth): 0.06 wt %, Cu:0.02 wt %, Mn:0.01 wt %, Mg :≤0.01 wt %, Zn :≤0.01 wt %, Ti :≤0.02 wt %, surplus are Al.
A, the technological process of production of casting volume is: smelting furnace preparations → furnace charge preparation → shove charge → melt → stir with processing (refining for the first time) → converter and the filter cleaner → casting of standing skim → strumbox of (refining for the second time) → degasification tank degasification two channels twin-stage ceramic filter plate in skim → adjusting component → stove becomes the continuous casting and rolling plate that 6.5mm is thick, then be wound into casting volume (being the Casting Rolled Sheet band), wherein in the furnace charge preparation, the regulation to waste material is: waste material is used 1060, 1070 fine aluminium waste materials, total input amount≤20%(wherein secondary waste material answers≤10%), virgin aluminium ingot >=80%,
B, technical process cold rolling, paper tinsel rolling Preparation Method are: 6.5mm casting volume → 3.3 → 2.8 → 1.8 → 1.1 → 0.65(trimming) → 0.38 → (450 ℃/10h → 360 ℃/6h) → turning paper tinsel rolls in middle perfect recrystallization annealing → and 0.22 → 0.13 → 0.08 → cut → test package
Process annealing adopts perfect recrystallization annealing, and technique is: adopt the annealing of furnace gas temperature control method, and furnace temperature≤100 ℃ shove charge, furnace temperature is warmed up to 450 ℃, is incubated 10 hours, after within 2 hours, cooling to 360 ℃, is incubated 6 hours air coolings of coming out of the stove.
C, described by the Casting Rolled Sheet strap cold rolling to 0.38mm, working modulus is 94.15%.After recrystallization annealing, be cold rolled to 0.08mm with foil mill, working modulus is 78.94%, to guarantee to obtain the qualified product of H18 state.
Embodiment 2
Embodiment 2 is the special-purpose rare-earth containing aluminium Alloy Foil of 0.10 * 240mm H24 lug
The special-purpose rare-earth containing aluminium Alloy Foil specific chemical composition of lug (massfraction) is: Fe:0.23 wt %, Si:0.07 wt %, RE(rare earth): 0.07 wt %, Cu:0.02 wt %, Mn:0.01 wt %, Mg :≤0.01 wt %, Zn :≤0.01 wt %, Ti :≤0.02 wt %, surplus are Al.
A, the technological process of production of casting volume is: smelting furnace preparations → furnace charge preparation → shove charge → melt → stir with processing (refining for the first time) → converter and the filter cleaner → casting of standing skim → strumbox of (refining for the second time) → degasification tank degasification two channels twin-stage ceramic filter plate in skim → adjusting component → stove becomes the continuous casting and rolling plate that 6.5mm is thick, then be wound into casting volume (being the Casting Rolled Sheet band), wherein in the furnace charge preparation, the regulation to waste material is: waste material is used 1060, 1070 fine aluminium waste materials, total input amount≤20%(wherein secondary waste material answers≤10%), virgin aluminium ingot >=80%,
B, technical process cold rolling, paper tinsel rolling Preparation Method are: 6.5mm Casting Rolled Sheet → 3.3 → 2.8 → 1.8 → 1.1 → 0.65(trimming) → 0.38 → (450 ℃/10h → 360 ℃/6h) → turning paper tinsel rolls in middle perfect recrystallization annealing → and 0.23 → 0.15 → 0.10 → cut → finished products (H24) (180 ℃/3h → 210 ℃/20h) → test package;
Process annealing adopts perfect recrystallization annealing, and technique is: adopt the annealing of furnace gas temperature control method, and furnace temperature≤100 ℃ shove charge, furnace temperature is warmed up to 450 ℃, is incubated 10 hours, after within 2 hours, cooling to 360 ℃, is incubated 6 hours air coolings of coming out of the stove.
C, described Casting Rolled Sheet strap cold rolling are to 0.38mm, and working modulus is 94.15%.After recrystallization annealing, after rolling the 0.10mm finished product with milling train, annealed, the finished product annealing process system is: the normal temperature shove charge is raised to 180 ℃ of insulations 3 hours in 2 hours and opens the oil removing of purge blower negative pressure, within 2 hours, be warmed up to 210 ℃ of insulations 20 hours, the air cooling of coming out of the stove.Mechanical property reaches: aluminium foil tensile strength >=125～180 MPa, aluminium foil unit elongation >=6%.
Embodiment 3
Embodiment 3 is the special-purpose rare-earth containing aluminium Alloy Foil of 0.15 * 240mm O state lug
The special-purpose rare-earth containing aluminium Alloy Foil specific chemical composition of lug (massfraction) is: Fe:0.25 wt %, Si:0.05 wt %, RE(rare earth): 0.075 wt %, Cu:0.01 wt %, Mn:0.01 wt %, Mg :≤0.01 wt %, Zn :≤0.01 wt %, Ti :≤0.02 wt %, surplus are Al.
A, the technological process of production of casting volume is: smelting furnace preparations → furnace charge preparation → shove charge → melt → stir with processing (refining for the first time) → converter and the filter cleaner → casting of standing skim → strumbox of (refining for the second time) → degasification tank degasification two channels twin-stage ceramic filter plate in skim → adjusting component → stove becomes the continuous casting and rolling plate that 6.5mm is thick, then be wound into casting volume (being the Casting Rolled Sheet band), wherein in the furnace charge preparation, the regulation to waste material is: waste material is used 1060, 1070 fine aluminium waste materials, total input amount≤20%(wherein secondary waste material answers≤10%), virgin aluminium ingot >=80%.
B, technical process cold rolling, paper tinsel rolling Preparation Method are: 6.5mm Casting Rolled Sheet → 3.3 → 2.8 → 1.8 → 1.1 → 0.65(trimming) → (450 ℃/10h → 360 ℃/6h) → 0.35 → turning paper tinsel rolls in middle perfect recrystallization annealing → 0.22 → 0.15 → cut → finished products (O state) (180 ℃/3h → 280 ℃/30h) → test package
Process annealing adopts perfect recrystallization annealing, and technique is: adopt the annealing of furnace gas temperature control method, that is, furnace temperature≤100 ℃ shove charge, furnace temperature is warmed up to 450 ℃, is incubated 10 hours, after within 2 hours, cooling to 360 ℃, is incubated 6 hours air coolings of coming out of the stove.
C, described the cast-rolling aluminum band is cold rolled to 0.65mm, working modulus is 90%.After recrystallization annealing, after rolling the 0.15mm finished product, annealed, the finished product annealing process system is: the normal temperature shove charge is raised to 180 ℃ of insulations 3 hours in 2 hours and opens the oil removing of purge blower negative pressure, within 2 hours, be warmed up to 280 ℃ of insulations 30 hours, within 2 hours, cool to 150 ℃ of air coolings of coming out of the stove.Mechanical property reaches: aluminium foil tensile strength >=80-130 MPa, aluminium foil unit elongation >=15%.
The special-purpose rare-earth containing aluminium Alloy Foil of the lug that the present invention produces the key technical indexes is:
(a) alloy state: H18, H22, H24, H26, O state
(b) dimensions and permissible variation:
Thickness * width * length: 0.08 ~ 0.15 ± 0.01 * 240 ± 1 * 650 ~ 750 ± 20(coil diameter) mm
(c) mechanical property:
Former 1XXX line aluminium alloy lug paper tinsel:
The O state is: aluminium foil tensile strength >=60-115 MPa aluminium foil unit elongation >=12%;
H22 is: aluminium foil tensile strength >=90-135 MPa aluminium foil unit elongation >=4%;
H24 is: aluminium foil tensile strength >=110-160 MPa aluminium foil unit elongation >=4%;
H26 is: aluminium foil tensile strength >=125-185 MPa aluminium foil unit elongation >=2%;
H18 is: aluminium foil tensile strength >=140 MPa aluminium foil unit elongation no requirement (NR)s.
The special-purpose rare-earth containing aluminium Alloy Foil of lug of the present invention:
The O state is: aluminium foil tensile strength >=80-130 MPa aluminium foil unit elongation >=15%.
H22 is: aluminium foil tensile strength >=110-155 MPa aluminium foil unit elongation >=8%.
H24 is: aluminium foil tensile strength >=125-180 MPa aluminium foil unit elongation >=6%.
H26 is: aluminium foil tensile strength >=140-195 MPa aluminium foil unit elongation >=3%.
H18 is: aluminium foil tensile strength >=160 MPa aluminium foil unit elongation >=1%.
The special-purpose rare-earth containing aluminium Alloy Foil of lug of the present invention has raising by a relatively large margin than the mechanical property of the alloy foil of original use.
(d) lug aluminium foil products visual appearance: aluminium foil surface should clean, smooth, non junction, without concave point, burn into crack, the phenomenon such as fold; Surface smoothing, without obvious alice, greasy dirt, wrinkling, impression and lace, tangent plane is smooth; After aluminium foil launches without adhesion with tear phenomenon; Without obvious other problem of appearance.
(e) surface flatness is not more than 15I.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. the special-purpose rare-earth containing aluminium Alloy Foil of a lug, it is characterized in that, in described aluminium alloy, contain silicon, the 0.05 ~ 0.10wt% of iron, 0.05 ~ 0.10 wt % of 0.10 ~ 0.30wt% rare earth, be less than or equal to 0.05wt % copper, be less than or equal to 0.05wt% zinc, be less than or equal to 0.05wt% titanium, be less than or equal to 0.03wt% manganese, be less than or equal to the magnesium of 0.03wt%, remaining content is aluminium and inevitable impurity.
2. the special-purpose rare-earth containing aluminium Alloy Foil of lug as claimed in claim 1, it is characterized in that, in described aluminium alloy, contain iron, 0.05 ~ 0.08% silicon, the 0.05 ~ 0.08wt% of 0.20 ~ 0.25wt% rare earth, be less than or equal to 0.03 wt % copper, be less than or equal to 0.01wt% zinc, be less than or equal to 0.03wt% titanium, be less than or equal to 0.01wt% manganese, be less than or equal to the magnesium of 0.01wt%, remaining content is aluminium and inevitable impurity.
3. the preparation method of the special-purpose rare-earth containing aluminium Alloy Foil of lug, is characterized in that, described preparation method comprises following procedure of processing:
S1: by the described proportioning configuration of claim 1 or 2 raw material, the smelting furnace of packing into fusing;
S2: the raw material after fusing is stirred, skims, adjusts material composition and refining treatment;
S3: the melt after refining is proceeded in standing furnace and carries out degasification impurity removing refining and standing processing again;
S4: the melt after secondary refining is processed is filled with continuously the rotation degasification tank and carries out the degasification processing of skimming;
S5: the melt that will skim after processing carries out filter cleaner through the micron order two channels twin-stage ceramic filter plate of filter box;
S6: gained melt after filter cleaner is delivered in front case continuously, and the connection cross gate is arranged at front case bottom, and melt injects the feed mouth between the Casting Roller of two rotations that are positioned at casting and rolling machine through cross gate, roll into the casting volume;
S7: the casting of S6 gained is rolled up through repeatedly being cold-rolled to thickness 0.38 ~ 0.65mm;
S8: S7 gained aluminium coiled material is carried out to the middle perfect recrystallization annealing of furnace gas temperature control method, shove charge during in furnace temperature≤100 ℃, then be raised to furnace temperature 450 ℃, be incubated 10 hours; With 2 hours, furnace temperature is dropped to 360 ℃ again, the air cooling of coming out of the stove after this temperature is incubated 6 hours;
S9: paper tinsel rolls, and the aluminium foil after annealing in S8 further is rolling to the special-purpose rare-earth containing aluminium Alloy Foil of lug finished product desired thickness;
S10: S9 gained aluminium foil is cut, and the mechanical property requirements different according to the user carried out finished products for the second time to the finished product of cutting.
4. the preparation method of the special-purpose rare-earth containing aluminium Alloy Foil of lug as claimed in claim 3, is characterized in that, in described S1, the smelting furnace smelting temperature is 720 ~ 760 ℃.
5. the preparation method of the special-purpose rare-earth containing aluminium Alloy Foil of lug as claimed in claim 3, it is characterized in that, in described S2 in smelting furnace the refining temperature to melt degasification removal of impurities be 740 ~ 750 ℃, described refining treatment periodically passes into high pure nitrogen for adopting from the gas permeable brick at the bottom of smelting furnace in stove.
6. the preparation method of the special-purpose rare-earth containing aluminium Alloy Foil of lug as claimed in claim 3, is characterized in that, the melt temperature that described S3 transfer enters standing furnace is 730 ~ 760 ℃, and in standing furnace, refining temperature is 740 ~ 750 ℃.
7. the preparation method of the special-purpose rare-earth containing aluminium Alloy Foil of lug as claimed in claim 3, is characterized in that, in described S6 before the case liquid level be 16 ± 1mm; Casting and rolling machine alloy teeming temperature is 690 ~ 695 ℃, and roll is 58 ~ 62mm; Roll casting speed is 1000 ~ 1200mm/min; Rolling load is 330 ~ 430t; The cooling employing water-cooling pattern of casting, cooling intensity is that inlet water temperature is lower than 30 ℃, hydraulic pressure 3 ~ 5kg/cm2.
8. the preparation method of the special-purpose rare-earth containing aluminium Alloy Foil of lug as claimed in claim 3, is characterized in that, in described S1, total input amount of fine aluminium waste material is not more than 20wt%, and wherein secondary fine aluminium waste material is not more than 10wt%, and the virgin aluminium ingot input amount is not less than 80%.
9. the preparation method of the special-purpose rare-earth containing aluminium Alloy Foil of lug as claimed in claim 3, is characterized in that, in described S7, the cold roll convexity is: top roll 0.02mm, lower roll are plain-barreled roll; In S9, the paper tinsel roll crown is: top roll 0.06mm, lower roll 0.06mm; Paper tinsel rolls the cooling employing oil cooling of technique of roller heat convex degree learning and the mode of the cooling combination of roller.
10. the preparation method of the special-purpose rare-earth containing aluminium Alloy Foil of lug as claimed in claim 3, it is characterized in that, in described S7 rolling be five to six times cold rolling, respectively aluminium alloy casting rolling is made to 3.3mm, 2.8mm, 1.8mm, 1.1mm, aluminium alloy cold rolling coil that 0.65mm, 0.38mm are thick.
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| US11495801B2 (en) | 2017-11-21 | 2022-11-08 | Speira Gmbh | High-strength battery electrode foil for the production of lithium-ion accumulators |
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| CN111793759A (en) * | 2020-08-11 | 2020-10-20 | 华北铝业有限公司 | 1070 high-performance aluminum foil for lithium ion battery and preparation method thereof |
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