CN108559878B - Battery case aluminum alloy strip and preparation method thereof - Google Patents
Battery case aluminum alloy strip and preparation method thereof Download PDFInfo
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- CN108559878B CN108559878B CN201810191116.6A CN201810191116A CN108559878B CN 108559878 B CN108559878 B CN 108559878B CN 201810191116 A CN201810191116 A CN 201810191116A CN 108559878 B CN108559878 B CN 108559878B
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000000126 substance Substances 0.000 claims abstract description 13
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 238000005097 cold rolling Methods 0.000 claims description 79
- 239000000047 product Substances 0.000 claims description 38
- 230000007704 transition Effects 0.000 claims description 30
- 239000011265 semifinished product Substances 0.000 claims description 26
- 238000000137 annealing Methods 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 15
- 238000005096 rolling process Methods 0.000 claims description 14
- 238000010926 purge Methods 0.000 claims description 7
- 238000007493 shaping process Methods 0.000 claims 2
- 229910017435 S2 In Inorganic materials 0.000 claims 1
- 239000013078 crystal Substances 0.000 abstract description 9
- 230000000704 physical effect Effects 0.000 abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- B21B1/22—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 plates, strips, bands or sheets of indefinite length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
-
- 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
-
- 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
- B21B1/22—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 plates, strips, bands or sheets of indefinite length
- B21B2001/221—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 plates, strips, bands or sheets of indefinite length by cold-rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B2003/001—Aluminium or its alloys
Abstract
The invention discloses a kind of battery case aluminum alloy strip and preparation method thereof, the mass percent of chemical component and each chemical component that battery case aluminum alloy strip contains is as follows: Si :≤0.2%；Fe:0.5%~0.6%；Cu:0.05%~0.10%；Mn:0.06%~1.15%；Mg :≤0.03%；Zn :≤0.03%；Ti:0.02%~0.04%；Inevitable impurity element :≤0.15%；Surplus is Al.It can make its crystal grain uniformity, and the diameter of crystal grain can guarantee the physical properties requirement such as its tensile strength, yield strength and elongation percentage less than 50 μm.
Description
Technical field
The present invention relates to a kind of battery case aluminum alloy strips and preparation method thereof.
Background technique
Currently, the shell of the lithium ion secondary battery of square, using aluminium sheet or aluminium alloy plate as raw material, by being pressed into
Type (the thinning molding of deep drawing) and manufacture, battery, which has, utilizes the shell and the knot for covering enclosed electrode, partition, electrolyte etc.
The engagement of structure, the shell and aluminum or lid made of aluminum alloy uses laser welding.
Therefore, to the aluminium sheet of battery case or aluminium alloy plate, it is desirable that the compression moulding as characteristic necessary to manufacturing
Property, laser welding it is good, also require the strength durable after shell is made simultaneously good.The strength durable of so-called shell
Property, it is not expanded long-time uses specifically, referring to, is not easy to be deformed because of external force, be not easy aperture deformation
Deng characteristic.
In recent years, in order to run various softwares, need to improve battery capacity, demand shell is thinner and is suitable for utensil
The shell of the wide shape of more slim width compared with prior art.
In the shell for enclosing battery, internal temperature rises to 85 DEG C or so.Internal pressure is generated in shell sometimes as a result, to lead
Cause case swells.Therefore, demand reduces such material expanded.In addition, can also enclose the electronic equipment of battery by
To external force.Under such circumstances, it is desirable to battery case not damaged, material for needing resistance to embedability high deformation.In addition, wanting
Even if ask under shell state after molding by the external force for forming big intrusion, it is also not easy the characteristic of aperture, certainly
It is required that deformation drag is big.From the aspect of the durability of battery case, high intensity is desired characteristic.
But for high-intensitive material, it is difficult to be shaped to the shape that there is thin-walled and cover thickness is small, width and height are big
The shell of shape.The ratio of wide, i.e. cover the width/thickness of the thin width of shell is bigger, and the difficulty of mouldability more increases.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies of existing technologies, a kind of battery case aluminium alloy plate is provided
Band, it can make its crystal grain uniformity, and the diameter of crystal grain can guarantee its tensile strength, yield strength and prolong less than 50 μm
Stretch the physical properties requirement such as rate.
In order to solve the above-mentioned technical problem, the technical scheme is that a kind of battery case aluminum alloy strip, it contains
Chemical component and each chemical component mass percent it is as follows:
Si :≤0.2%；
Fe:0.5%~0.6%；
Cu:0.05%~0.10%；
Mn:0.06%~1.15%；
Mg :≤0.03%；
Zn :≤0.03%；
Ti:0.02%~0.04%；
Inevitable impurity element :≤0.15%；
Surplus is Al, amounts to 100%.
The present invention also provides a kind of preparation method of battery case aluminum alloy strip, method includes to have the following steps:
S1: blank is obtained；
S2: blank is handled by thick cold rolling and pinch pass, obtains the first semi-finished product；Wherein, thick cold rolling uses roughing roller
Group；Pinch pass uses finish rolling roller group；
S3: the first semi-finished product obtain the second semi-finished product by annealing；Wherein, it in annealing process, first uses and follows
Ring wind 255 DEG C~265 DEG C at a temperature of purging is carried out oil removing 5~7 hours to the first semi-finished product, then at 345 DEG C~355 DEG C
At a temperature of annealing is carried out 4~6 hours to the first semi-finished product；
S4: pinch pass again is carried out to the second semi-finished product and is handled, third semi-finished product are obtained；
S5: and then finished product is obtained after successively being cleaned, cut and being packed to third semi-finished product.
Further, blank with a thickness of 7.5 ± 0.3mm, in step s 2, successively by thick cold rolling and a cold sperm three times
Processing is rolled, the first semi-finished product are obtained；Wherein, the inlet thickness of thick cold rolling is 7.5 ± 0.3mm for the first time, thick cold rolling for the first time
Exit thickness is 5.1 ± 0.10mm；The inlet thickness of second of thick cold rolling is 5.1 ± 0.10mm, the outlet of second of thick cold rolling
With a thickness of 3.5 ± 0.10mm；The inlet thickness of the thick cold rolling of third time is 3.5 ± 0.10mm, the exit thickness of the thick cold rolling of third time
For 2.4 ± 0.05mm；The inlet thickness of first time pinch pass is 2.4 ± 0.05mm, and the exit thickness of first time pinch pass is
1.93±0.03mm；In step s 4, the inlet thickness of pinch pass is 1.93 ± 0.03mm again, and the outlet of pinch pass again is thick
Degree is 1.2 ± 0.02mm.
Further, the roughness of the roughing roller of the roughing roller group is 0.4 ± 0.03um, the planishing roll of the finish rolling roller group
Roughness be 0.3 ± 0.03um.
The present invention also provides a kind of preparation method of battery case aluminum alloy strip, method includes to have the following steps:
B1: blank is obtained；
B2: blank is handled by thick cold rolling and pinch pass, obtains First Transition product；Wherein, thick cold rolling uses roughing roller
Group；Pinch pass uses finish rolling roller group；
B3: First Transition product obtain the second transition product by annealing；Wherein, it in annealing process, first uses and follows
Ring wind 255 DEG C~265 DEG C at a temperature of purging is carried out oil removing 5~7 hours to First Transition product, then at 345 DEG C~355 DEG C
At a temperature of annealing is carried out 4~6 hours to First Transition product；
B4: and then finished product is obtained after the second transition product are successively cut and packed.
Further, blank with a thickness of 7.5 ± 0.3mm, in step B2, successively pass through thick cold rolling and twice cold sperm three times
Processing is rolled, First Transition product are obtained；Wherein, the inlet thickness of thick cold rolling is 7.5 ± 0.3mm for the first time, thick cold rolling for the first time
Exit thickness is 5.1 ± 0.10mm；The inlet thickness of second of thick cold rolling is 5.1 ± 0.10mm, the outlet of second of thick cold rolling
With a thickness of 3.5 ± 0.10mm；The inlet thickness of the thick cold rolling of third time is 3.5 ± 0.10mm, the exit thickness of the thick cold rolling of third time
For 2.4 ± 0.05mm；The inlet thickness of first time pinch pass is 2.4 ± 0.05mm, and the exit thickness of first time pinch pass is 1.7
±0.03mm；The inlet thickness of second of pinch pass is 1.7 ± 0.03mm, the exit thickness of second of pinch pass is 1.2 ±
0.02mm。
Further, blank with a thickness of 7.5 ± 0.3mm, in step B2, successively pass through thick cold rolling and twice cold sperm three times
Processing is rolled, First Transition product are obtained；Wherein, the inlet thickness of thick cold rolling is 7.5 ± 0.3mm for the first time, thick cold rolling for the first time
Exit thickness is 4.9 ± 0.10mm；The inlet thickness of second of thick cold rolling is 4.9 ± 0.10mm, the outlet of second of thick cold rolling
With a thickness of 3.8 ± 0.10mm；The inlet thickness of the thick cold rolling of third time is 3.8 ± 0.10mm, the exit thickness of the thick cold rolling of third time
For 2.4 ± 0.05mm；The inlet thickness of first time pinch pass is 2.4 ± 0.05mm, and the exit thickness of first time pinch pass is
1.55±0.03mm；The inlet thickness of second of pinch pass is 1.55 ± 0.03mm, and the exit thickness of second of pinch pass is 1.0
±0.02mm。
Further, the roughness of the roughing roller of the roughing roller group is 0.4 ± 0.03um, the planishing roll of the finish rolling roller group
Roughness be 0.3 ± 0.03um.
After above-mentioned technical proposal, this battery case for being prepared using chemical component and preparation method of the invention
Meet GB/T3190 regulation with aluminium alloy plate, and the physical properties such as tensile strength, yield strength, elongation percentage conform to
It asks, crystal grain uniformity, crystal grain diameter can be suitable for the preparation of battery case, good moldability less than 50 μm.
Specific embodiment
In order that the present invention can be more clearly and readily understood, below according to specific embodiment, to the present invention make into
One step detailed description.
Embodiment one
The mass percent of a kind of battery case aluminum alloy strip, chemical component and each chemical component that it contains is as follows:
Si:0.1%；
Fe:0.5%；
Cu:0.05%；
Mn:0.06%；
Mg:0.01%；
Zn:0.01%；
Ti:0.02%；
Inevitable impurity element: 0.05%；
Surplus is Al, amounts to 100%.
The preparation method of the battery case aluminum alloy strip, method include to have the following steps:
S1: blank is obtained；
S2: blank is handled by thick cold rolling and pinch pass, obtains the first semi-finished product；Wherein, thick cold rolling uses roughing roller
Group；Pinch pass uses finish rolling roller group；
S3: the first semi-finished product obtain the second semi-finished product by annealing；Wherein, it in annealing process, first uses and follows
Ring wind 260 DEG C at a temperature of purging is carried out oil removing 6 hours to the first semi-finished product, then 350 DEG C at a temperature of to the first half at
Product carry out annealing 5 hours；
S4: pinch pass again is carried out to the second semi-finished product and is handled, third semi-finished product are obtained；
S5: and then finished product is obtained after successively being cleaned, cut and being packed to third semi-finished product.
Blank with a thickness of 7.5 ± 0.3mm, in step s 2, successively by thick cold rolling three times and pinch pass processing,
Obtain the first semi-finished product；Wherein, the inlet thickness of thick cold rolling is 7.5 ± 0.3mm for the first time, for the first time the exit thickness of thick cold rolling
For 5.1 ± 0.10mm, entrance tension is 50 ± 3KN, and outlet tension is 55 ± 3KN；The inlet thickness of second of thick cold rolling is 5.1
± 0.10mm, the exit thickness of second thick cold rolling are 3.5 ± 0.10mm, and entrance tension is 50 ± 3KN, outlet tension is 46 ±
3KN；The inlet thickness of the thick cold rolling of third time is 3.5 ± 0.10mm, and the exit thickness of the thick cold rolling of third time is 2.4 ± 0.05mm,
Entrance tension is 40 ± 3KN, and outlet tension is 35 ± 3KN；The inlet thickness of first time pinch pass be 2.4 ± 0.05mm, first
The exit thickness of secondary pinch pass is 1.93 ± 0.03mm, and entrance tension is 31 ± 3KN, and outlet tension is 28 ± 3KN；In step S4
In, the inlet thickness of pinch pass is 1.93 ± 0.03mm again, and the exit thickness of pinch pass is 1.2 ± 0.02mm, entrance again
Tension is 25 ± 2KN, and outlet tension is 21 ± 2KN.
The roughness of the roughing roller of the roughing roller group be 0.4 ± 0.03um, the planishing roll of the finish rolling roller group it is coarse
Degree is 0.3 ± 0.03um.
After testing, tensile strength Rm can reach 120~150mpa, yield strength Rp0.2 >=100mpa, elongation percentage
A50 >=6%, Vickers hardness >=54HV, crystal grain diameter is less than 50 μm, surface roughness :≤0.3 μm, physical property accords with
It closes and requires.
Embodiment two
The mass percent of a kind of battery case aluminum alloy strip, chemical component and each chemical component that it contains is as follows:
Si:0.2%；
Fe:0.6%；
Cu:0.10%；
Mn:1.15%；
Mg:0.03%；
Zn:0.03%；
Ti:0.04%；
Inevitable impurity element: 0.15%；
Surplus is Al, amounts to 100%.
The preparation method of the battery case aluminum alloy strip, method include to have the following steps:
B1: blank is obtained；
B2: blank is handled by thick cold rolling and pinch pass, obtains First Transition product；Wherein, thick cold rolling uses roughing roller
Group；Pinch pass uses finish rolling roller group；
B3: First Transition product obtain the second transition product by annealing；Wherein, it in annealing process, first uses and follows
Ring wind 260 DEG C at a temperature of to First Transition product carry out purging oil removing 6 hours, then 350 DEG C at a temperature of to First Transition
Product carry out annealing 5 hours；
B4: and then finished product is obtained after the second transition product are successively cut and packed.
Blank with a thickness of 7.5 ± 0.3mm, in step B2, successively handled by thick cold rolling three times and pinch pass twice,
Obtain First Transition product；Wherein, the inlet thickness of thick cold rolling is 7.5 ± 0.3mm for the first time, for the first time the exit thickness of thick cold rolling
For 5.1 ± 0.10mm, entrance tension is 50 ± 3KN, and outlet tension is 55 ± 3KN；The inlet thickness of second of thick cold rolling is 5.1
± 0.10mm, the exit thickness of second thick cold rolling are 3.5 ± 0.10mm, and entrance tension is 50 ± 3KN, outlet tension is 46 ±
3KN；The inlet thickness of the thick cold rolling of third time is 3.5 ± 0.10mm, and the exit thickness of the thick cold rolling of third time is 2.4 ± 0.05mm,
Entrance tension is 40 ± 3KN, and outlet tension is 35 ± 3KN；The inlet thickness of first time pinch pass be 2.4 ± 0.05mm, first
The exit thickness of secondary pinch pass is 1.7 ± 0.03mm, and entrance tension is 31 ± 3KN, and outlet tension is 28 ± 3KN；Second of essence
The inlet thickness of cold rolling is 1.7 ± 0.03mm, and the exit thickness of second of pinch pass is 1.2 ± 0.02mm, and entrance tension is 25
± 2KN, outlet tension are 21 ± 2KN.
The roughness of the roughing roller of the roughing roller group be 0.4 ± 0.03um, the planishing roll of the finish rolling roller group it is coarse
Degree is 0.3 ± 0.03um.
After testing, tensile strength Rm can reach 105~120mpa, and yield strength Rp0.2 prolongs in 45~55mpa
Rate A50 >=38% is stretched, physical property meets the requirements, and crystal grain diameter is less than 50 μm, surface roughness :≤0.35 μm.
Embodiment three
The mass percent of a kind of battery case aluminum alloy strip, chemical component and each chemical component that it contains is as follows:
Si:0.2%；
Fe:0.55%；
Cu:0.07%；
Mn:1.1%；
Mg:0.02%；
Zn:0.02%；
Ti:0.03%；
Inevitable impurity element: 0.1%；
Surplus is Al, amounts to 100%.
The preparation method of the battery case aluminum alloy strip, method include to have the following steps:
B1: blank is obtained；
B2: blank is handled by thick cold rolling and pinch pass, obtains First Transition product；Wherein, thick cold rolling uses roughing roller
Group；Pinch pass uses finish rolling roller group；
B3: First Transition product obtain the second transition product by annealing；Wherein, it in annealing process, first uses and follows
Ring wind 260 DEG C at a temperature of to First Transition product carry out purging oil removing 5 hours, then 355 DEG C at a temperature of to First Transition
Product carry out annealing 6 hours；
B4: and then finished product is obtained after the second transition product are successively cut and packed.
Blank with a thickness of 7.5 ± 0.3mm, in step B2, successively handled by thick cold rolling three times and pinch pass twice,
Obtain First Transition product；Wherein, the inlet thickness of thick cold rolling is 7.5 ± 0.3mm for the first time, for the first time the exit thickness of thick cold rolling
For 4.9 ± 0.10mm, entrance tension is 50 ± 3KN, and outlet tension is 55 ± 3KN；The inlet thickness of second of thick cold rolling is 4.9
± 0.10mm, the exit thickness of second thick cold rolling are 3.8 ± 0.10mm, and entrance tension is 50 ± 3KN, outlet tension is 46 ±
3KN；The inlet thickness of the thick cold rolling of third time is 3.8 ± 0.10mm, and the exit thickness of the thick cold rolling of third time is 2.4 ± 0.05mm,
Entrance tension is 40 ± 3KN, and outlet tension is 35 ± 3KN；The inlet thickness of first time pinch pass be 2.4 ± 0.05mm, first
The exit thickness of secondary pinch pass is 1.55 ± 0.03mm, and entrance tension is 31 ± 3KN, and outlet tension is 28 ± 3KN；Second of essence
The inlet thickness of cold rolling is 1.55 ± 0.03mm, and the exit thickness of second of pinch pass is 1.0 ± 0.02mm, and entrance tension is 25
± 3KN, outlet tension are 21 ± 3KN.
The roughness of the roughing roller of the roughing roller group be 0.4 ± 0.03um, the planishing roll of the finish rolling roller group it is coarse
Degree is 0.3 ± 0.03um.
After testing, tensile strength Rm can reach 105~120mpa, and yield strength Rp0.2 prolongs in 45~55mpa
Rate A50 >=38% is stretched, physical property meets the requirements, and crystal grain diameter is less than 50 μm, surface roughness :≤0.35 μm.
Particular embodiments described above, pair present invention solves the technical problem that, technical scheme and beneficial effects carry out
It is further described, it should be understood that the above is only a specific embodiment of the present invention, is not limited to this
Invention, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in this hair
Within bright protection scope.
Claims (7)
1. a kind of preparation method of battery case aluminum alloy strip, which is characterized in that the change that battery case aluminum alloy strip contains
It studies point and the mass percent of each chemical component is as follows:
Si:0.1%；
Fe:0.5%；
Cu:0.05%；
Mn:0.06%；
Mg:0.01%；
Zn:0.01%；
Ti:0.02%；
Inevitable impurity element: 0.05%；
Surplus is Al, amounts to 100%；
Method includes to have the following steps:
S1: blank is obtained；
S2: blank is handled by thick cold rolling and pinch pass, obtains the first semi-finished product；Wherein, thick cold rolling uses roughing roller group；
Pinch pass uses finish rolling roller group；
S3: the first semi-finished product obtain the second semi-finished product by annealing；Wherein, in annealing process, circulated air is first used
255 DEG C~265 DEG C at a temperature of purging is carried out oil removing 5~7 hours to the first semi-finished product, then in 345 DEG C~355 DEG C of temperature
Under annealing is carried out 4~6 hours to the first semi-finished product；
S4: pinch pass again is carried out to the second semi-finished product and is handled, third semi-finished product are obtained；
S5: and then finished product is obtained after successively being cleaned, cut and being packed to third semi-finished product.
2. preparation method according to claim 1, it is characterised in that: blank with a thickness of 7.5 ± 0.3mm, in step S2
In, successively by thick cold rolling three times and pinch pass processing, obtain the first semi-finished product；Wherein, the entrance of first time thick cold rolling
With a thickness of 7.5 ± 0.3mm, the exit thickness of thick cold rolling is 5.1 ± 0.10mm for the first time；The inlet thickness of thick cold rolling is for the second time
5.1 ± 0.10mm, the exit thickness of second of thick cold rolling are 3.5 ± 0.10mm；The inlet thickness of the thick cold rolling of third time is 3.5 ±
The exit thickness of 0.10mm, the thick cold rolling of third time are 2.4 ± 0.05mm；The inlet thickness of first time pinch pass be 2.4 ±
0.05mm, the exit thickness of first time pinch pass are 1.93 ± 0.03mm；In step s 4, the inlet thickness of pinch pass is again
1.93 ± 0.03mm, the exit thickness of pinch pass is 1.2 ± 0.02mm again.
3. preparation method according to claim 1, it is characterised in that: the roughness of the shaping roll of the roughing roller group is
0.4 ± 0.03 μm, the roughness of the planishing roll of the finish rolling roller group is 0.3 ± 0.03 μm.
4. a kind of preparation method of battery case aluminum alloy strip, which is characterized in that the change that battery case aluminum alloy strip contains
It studies point and the mass percent of each chemical component is as follows:
Si:0.1%；
Fe:0.5%；
Cu:0.05%；
Mn:0.06%；
Mg:0.01%；
Zn:0.01%；
Ti:0.02%；
Inevitable impurity element: 0.05%；
Surplus is Al, amounts to 100%；
Method includes to have the following steps:
B1: blank is obtained；
B2: blank is handled by thick cold rolling and pinch pass, obtains First Transition product；Wherein, thick cold rolling uses roughing roller group；
Pinch pass uses finish rolling roller group；
B3: First Transition product obtain the second transition product by annealing；Wherein, in annealing process, circulated air is first used
255 DEG C~265 DEG C at a temperature of purging is carried out oil removing 5~7 hours to First Transition product, then in 345 DEG C~355 DEG C of temperature
Under annealing is carried out 4~6 hours to First Transition product；
B4: and then finished product is obtained after the second transition product are successively cut and packed.
5. the preparation method according to claim 4, it is characterised in that: blank with a thickness of 7.5 ± 0.3mm, in step B2
In, successively by thick cold rolling three times and the processing of pinch pass twice, obtain First Transition product；Wherein, the entrance of first time thick cold rolling
With a thickness of 7.5 ± 0.3mm, the exit thickness of thick cold rolling is 5.1 ± 0.10mm for the first time；The inlet thickness of thick cold rolling is for the second time
5.1 ± 0.10mm, the exit thickness of second of thick cold rolling are 3.5 ± 0.10mm；The inlet thickness of the thick cold rolling of third time is 3.5 ±
The exit thickness of 0.10mm, the thick cold rolling of third time are 2.4 ± 0.05mm；The inlet thickness of first time pinch pass be 2.4 ±
0.05mm, the exit thickness of first time pinch pass are 1.7 ± 0.03mm；The inlet thickness of second of pinch pass be 1.7 ±
0.03mm, the exit thickness of second of pinch pass are 1.2 ± 0.02mm.
6. the preparation method according to claim 4, it is characterised in that: blank with a thickness of 7.5 ± 0.3mm, in step B2
In, successively by thick cold rolling three times and the processing of pinch pass twice, obtain First Transition product；Wherein, the entrance of first time thick cold rolling
With a thickness of 7.5 ± 0.3mm, the exit thickness of thick cold rolling is 4.9 ± 0.10mm for the first time；The inlet thickness of thick cold rolling is for the second time
4.9 ± 0.10mm, the exit thickness of second of thick cold rolling are 3.8 ± 0.10mm；The inlet thickness of the thick cold rolling of third time is 3.8 ±
The exit thickness of 0.10mm, the thick cold rolling of third time are 2.4 ± 0.05mm；The inlet thickness of first time pinch pass be 2.4 ±
0.05mm, the exit thickness of first time pinch pass are 1.55 ± 0.03mm；The inlet thickness of second of pinch pass be 1.55 ±
0.03mm, the exit thickness of second of pinch pass are 1.0 ± 0.02mm.
7. the preparation method according to claim 4, it is characterised in that: the roughness of the shaping roll of the roughing roller group is
0.4 ± 0.03 μm, the roughness of the planishing roll of the finish rolling roller group is 0.3 ± 0.03 μm.
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| FR3123922B1 (en) | 2021-06-11 | 2023-12-22 | Constellium Rolled Products Singen | Strong aluminum alloy sheet for parallelepiped battery box |
| CN115247239B (en) * | 2021-12-30 | 2023-05-26 | 兰州理工大学 | Aluminum alloy strip for power battery shell and production method thereof |
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