CN117568667B - Aluminum foil material and preparation method thereof - Google Patents
Aluminum foil material and preparation method thereof Download PDFInfo
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- CN117568667B CN117568667B CN202410053450.0A CN202410053450A CN117568667B CN 117568667 B CN117568667 B CN 117568667B CN 202410053450 A CN202410053450 A CN 202410053450A CN 117568667 B CN117568667 B CN 117568667B
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- 239000011888 foil Substances 0.000 title claims abstract description 110
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 108
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 108
- 239000000463 material Substances 0.000 title claims abstract description 93
- 238000002360 preparation method Methods 0.000 title abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 31
- 229910052742 iron Inorganic materials 0.000 claims abstract description 18
- 229910052802 copper Inorganic materials 0.000 claims abstract description 11
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 11
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 10
- 238000005096 rolling process Methods 0.000 claims description 22
- 238000000137 annealing Methods 0.000 claims description 13
- 238000005266 casting Methods 0.000 claims description 13
- 229910045601 alloy Inorganic materials 0.000 claims description 12
- 239000000956 alloy Substances 0.000 claims description 12
- 238000005097 cold rolling Methods 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 10
- 238000003723 Smelting Methods 0.000 claims description 4
- 238000007872 degassing Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 239000005030 aluminium foil Substances 0.000 claims 3
- 230000006911 nucleation Effects 0.000 abstract description 10
- 238000010899 nucleation Methods 0.000 abstract description 10
- 238000005204 segregation Methods 0.000 abstract description 9
- 239000002245 particle Substances 0.000 abstract description 6
- 235000013619 trace mineral Nutrition 0.000 abstract description 4
- 239000011573 trace mineral Substances 0.000 abstract description 4
- 230000002349 favourable effect Effects 0.000 abstract description 3
- 238000007712 rapid solidification Methods 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 12
- 238000012545 processing Methods 0.000 description 9
- 238000000265 homogenisation Methods 0.000 description 7
- 238000005098 hot rolling Methods 0.000 description 7
- 238000004321 preservation Methods 0.000 description 6
- 238000001953 recrystallisation Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910002467 CrFe Inorganic materials 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 241000208125 Nicotiana Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000012785 packaging film Substances 0.000 description 1
- 229920006280 packaging film Polymers 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- 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
- B21B1/40—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
- 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
- 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
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
-
- 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
-
- 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
- C22F1/043—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 of alloys with silicon as the next major constituent
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses an aluminum foil material and a preparation method thereof. The aluminum foil material comprises, based on the total weight of the aluminum foil material: 1.0 wt% to 2.0 wt% Fe;0.9 wt% to 1.8 wt% Si;0 wt% to 0.05 wt% Cu;0 wt% to 0.05 wt% Mn;0 wt% to 0.05 wt% Mg;0 wt% to 0.03 wt% Cr;0 wt% to 0.05 wt% Ti; and the balance Al, wherein the weight ratio of Fe to Si is in the range of 1.0 to 2.2. By controlling the mass percentage of Fe and Si in the aluminum foil material, the ratio of Fe and Si and the content of trace elements which are easy to cause segregation, particle-induced nucleation particles which are favorable for grain refinement can be formed, and meanwhile, the content of Cr element is controlled, so that the size of grains can be controlled, micro segregation in the rapid solidification process is reduced, the mechanical property, the forming property and the surface quality of the aluminum foil material are improved, and pinholes are reduced.
Description
Technical Field
The invention relates to the technical field of aluminum foil materials, in particular to an aluminum foil material and a preparation method thereof.
Background
The thickness of the aluminum foil material for the aluminum plastic film is 35-55 micrometers, the aluminum foil material is usually produced by adopting an ingot hot rolling method, in the ingot hot rolling method, hot rolled blanks firstly need to be subjected to surface milling to remove defects such as oxide layers and impurities on the surface of the ingot, then the microstructure of the ingot is more uniform through homogenization, and then a plurality of processes such as hot rolling, cold rolling and intermediate annealing are carried out, and after repeated recovery and recrystallization, the uniformity of the internal structure of the blanks and the grain size are obviously improved, so that the hot rolled blanks are generally good in quality and suitable for high-quality aluminum foil materials and aluminum foil material products for deep processing. However, the hot rolled blank has the problems of high lug making rate, easiness in cracking, unsmooth deformation zone and the like in the deep drawing process, and the yield of the high-quality aluminum foil material is limited to be improved. In addition, the quality of the hot rolled ingot directly affects the forming quality of the aluminum foil material. The hot rolled blanks in the next half year 2021 are in shortage of supply, limited in source and unstable in quality, and the problems of high processing cost, many surface defects and the like are caused by long processing flow.
Compared with the ingot hot rolling method, the double-roller casting and rolling method has the advantages that the technological process for producing the aluminum foil material blank is relatively simple and the cost is low; the method comprises the steps of directly injecting an aluminum melt into two rotating casting rollers (crystallizers) without complex process steps of ingot casting, face milling, homogenization, hot rolling and the like, completing two processes of solidification and hot rolling in a casting and rolling area for 2-3 s to obtain a plate with the thickness of 4-10 mm, and finally rolling into a plate with the thickness of 0.3-0.7 mm serving as an aluminum foil material blank through a series of processes of cold rolling, intermediate annealing and the like. However, due to different cooling modes and different hot working conditions in the process of producing the plate by the double-roll casting and rolling method, the defects of segregation, uneven structure, coarse grains after annealing and the like exist in the microstructure in the cast-rolling plate, and when macrosegregation occurs in the cast-rolling blank, pinholes are easy to occur in rolling, so that the surface quality is reduced. Because of the difficulty in quality control of the twin roll casting process, relatively few applications are made in high quality aluminum foil material products.
The aluminum foil material for the aluminum plastic film flexible package of the domestic high-end lithium battery is mainly made of 8 series aluminum alloys such as 8021, 8079 and the like, and the aluminum foil material is produced by an ingot hot rolling method. However, if the problems of component segregation, uneven structure, coarse grains and the like caused by the casting and rolling method can be solved, the processing cost of the aluminum foil material can be reduced, and the quality of the aluminum foil material can be improved.
Disclosure of Invention
The invention aims to provide an aluminum foil material and a preparation method thereof, which are used for solving the technical problems of poor surface quality, poor mechanical property and poor forming property of the aluminum foil material in the prior art.
To achieve the above object, according to one aspect of the present disclosure, there is provided an aluminum foil material comprising, based on the total weight of the aluminum foil material: 1.0 wt% to 2.0 wt% Fe;0.9 wt% to 1.8 wt% Si;0 wt% to 0.05 wt% Cu;0 wt% to 0.05 wt% Mn;0 wt% to 0.05 wt% Mg;0 wt% to 0.03 wt% Cr;0 wt% to 0.05 wt% Ti; and the balance Al, wherein the weight ratio of Fe to Si is in the range of 1.0 to 2.2.
Further, the aluminum foil material comprises, based on the total weight of the aluminum foil material: 1.1 wt% to 1.7 wt% Fe;1.1 wt% to 1.7 wt% Si;0.001 wt% to 0.04 wt% Cu;0.001 wt% to 0.04 wt% Mn;0.001 wt% to 0.04 wt% Mg;0.0001 wt% to 0.03 wt% Cr;0.001 wt% to 0.04 wt% Ti; and the balance Al.
Further, the aluminum foil material comprises, based on the total weight of the aluminum foil material: 1.2 wt% to 1.5 wt% Fe;1.1 wt% to 1.5 wt% Si;0.001 wt% to 0.04 wt% Cu;0.001 wt% to 0.04 wt% Mn;0.001 wt% to 0.04 wt% Mg;0.0005 wt% to 0.02 wt% Cr;0.001 wt% to 0.04 wt% Ti; and the balance Al.
Further, the weight ratio of Fe to Si is in the range of 1.1 to 1.5.
Further, the weight ratio of Fe to Si is in the range of 1.1 to 1.3.
According to another aspect of the present disclosure, there is provided a method for preparing the above-described aluminum foil material of the present invention, comprising the steps of: step S1, adding raw materials into a smelting furnace and melting the raw materials to obtain molten alloy; step S2, carrying out grain refinement, degassing and filtering on the molten alloy, and then casting and rolling the molten alloy into a cast-rolled plate; step S3, cold rolling the cast-rolled sheet into a cold-rolled blank; step S4, homogenizing the cold-rolled blank at the temperature of 520-620 ℃ to obtain a homogenized cold-rolled blank; step S5, cold rolling the homogenized cold-rolled blank into a foil-rolled blank; step S6, rolling the foil rolled blank into aluminum foil; step S7: and annealing the aluminum foil at the temperature of 200-340 ℃ to obtain the aluminum foil material.
Further, in step S2, the thickness of the cast-rolled plate is 6.0 mm to 10.0mm.
Further, in step S3, the thickness of the cold rolled blank is 2.0 mm to 5.0mm.
Further, in step S5, the thickness of the foil-rolled blank is 0.2 mm to 1.5mm.
Further, in the step S6, the thickness of the aluminum foil is 0.015 mm-0.06 mm.
According to the technical scheme of the disclosure, the aluminum foil material and the preparation method thereof are provided, and particle-induced nucleation points which are favorable for grain refinement can be formed by controlling the mass percentage of Fe and Si in the aluminum foil material, the ratio of Fe and Si and the content of trace elements which are easy to cause segregation, so that the size of grains can be controlled, micro segregation in the rapid solidification process is reduced, the mechanical property, the forming property and the surface quality of the aluminum foil material are improved, and pinholes are reduced. In addition, the content of Cr element needs to be in a reasonable range, and the content of Cr element is too low, so that the purification processing cost is high; the Cr element is too high and is easy to be separated out from the matrix in the form of Al 7 (CrFe) nano phase to prevent the recrystallization nucleation, so that the content of the Cr element is not easy to exceed 0.03%, otherwise, the recrystallization nucleation is difficult, the recrystallized grains are coarse, and the formability and the surface quality of the aluminum foil are affected. By limiting the content of Cr element, the inhibition of Cr on recrystallization nucleation is reduced.
Drawings
Fig. 1 is a grain structure distribution diagram of an aluminum foil material of example 1 of the present application.
Fig. 2 is a grain structure distribution diagram of the aluminum foil material of comparative example 1.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The present disclosure will be described in detail with reference to examples.
In view of the deficiencies in the prior art mentioned in the background, one embodiment of the present disclosure provides an aluminum foil material comprising, based on the total weight of the aluminum foil material: 1.0 wt% to 2.0 wt% Fe;0.9 wt% to 1.8 wt% Si;0 wt% to 0.05 wt% Cu;0 wt% to 0.05 wt% Mn;0 wt% to 0.05 wt% Mg;0 wt% to 0.03 wt% Cr;0 wt% to 0.05 wt% Ti; and the balance Al, wherein the weight ratio of Fe to Si is in the range of 1.0 to 2.2.
According to the technical scheme, by controlling the mass percentage of Fe and Si in the aluminum foil material, the ratio of Fe and Si and the content of trace elements which are easy to cause segregation, particle-induced nucleation particles which are favorable for grain refinement can be formed, and meanwhile, the content of Cr elements which obstruct recrystallization nucleation is controlled, so that the size of grains can be controlled, micro segregation in the rapid solidification process is reduced, the mechanical property, the forming property and the surface quality of the aluminum foil material are improved, and pinholes are reduced.
For example, the aluminum foil material may comprise 1.0 wt%, 1.1 wt%, 1.2 wt%, 1.3 wt%, 1.4 wt%, 1.5 wt%, 1.6 wt%, 1.7 wt%, 1.8 wt%, 1.9 wt%, or 2.0 wt% Fe, based on the total weight of the aluminum foil material; si may be contained at 0.9 wt%, 1.0 wt%, 1.1 wt%, 1.2 wt%, 1.3 wt%, 1.4 wt%, 1.5 wt%, 1.6 wt%, 1.7 wt% or 1.8 wt%; may comprise 0 wt%、0.001 wt%、0.002 wt%、0.003 wt%、0.004 wt%、0.005 wt%、0.006 wt%、0.007 wt%、0.008 wt%、0.009 wt%、0.01 wt%、0.02 wt%、0.03 wt%、0.04 wt% or 0.05 wt% Cu; may contain 0 wt%、0.001 wt%、0.002 wt%、0.003 wt%、0.004 wt%、0.005 wt%、0.006 wt%、0.007 wt%、0.008 wt%、0.009 wt%、0.01 wt%、0.02 wt%、0.03 wt%、0.04 wt% or 0.05 wt% Mn; may contain 0 wt%、0.001 wt%、0.002 wt%、0.003 wt%、0.004 wt%、0.005 wt%、0.006 wt%、0.007 wt%、0.008 wt%、0.009 wt%、0.01 wt%、0.02 wt%、0.03 wt%、0.04 wt% or 0.05 wt% Mg; may comprise 0 wt%、0.001 wt%、0.002 wt%、0.003 wt%、0.004 wt%、0.005 wt%、0.006 wt%、0.007 wt%、0.008 wt%、0.009 wt%、0.01 wt%、0.02 wt%、0.03 wt% Cr; 0 wt%、0.001 wt%、0.002 wt%、0.003 wt%、0.004 wt%、0.005 wt%、0.006 wt%、0.007 wt%、0.008 wt%、0.009 wt%、0.01 wt%、0.02 wt%、0.03 wt%、0.04 wt% or 0.05 wt% Ti may be included.
For example, the weight ratio of Fe to Si may be 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, or 2.2.
In some examples, the aluminum foil material comprises, based on the total weight of the aluminum foil material: 1.1 wt% to 1.7 wt% Fe;1.1 wt% to 1.7 wt% Si;0.001 wt% to 0.04 wt% Cu;0.001 wt% to 0.04 wt% Mn;0.001 wt% to 0.04 wt% Mg;0.0001 to 0.03 wt% by weight of Cr;0.001 wt% to 0.04 wt% Ti; and the balance Al. By controlling the respective components in the aluminum foil material within the ranges, the mechanical properties, formability, and surface quality of the aluminum foil material can be further improved.
In some examples, the aluminum foil material comprises, based on the total weight of the aluminum foil material: 1.2 wt% to 1.5 wt% Fe;1.1 wt% to 1.5 wt% Si;0.001 wt% to 0.04 wt% Cu;0.001 wt% to 0.04 wt% Mn;0.001 wt% to 0.04 wt% Mg;0.0005 wt% to 0.02 wt% Cr;0.001 wt% to 0.04 wt% Ti; and the balance Al. By controlling the respective components in the aluminum foil material within the ranges, the mechanical properties, formability, and surface quality of the aluminum foil material can be further improved.
In some examples, the weight ratio of Fe to Si is in the range of 1.1 to 1.5. By controlling the weight ratio of Fe to Si within this range, the mechanical properties, formability and surface quality of the aluminum foil material can be further improved.
In some examples, the weight ratio of Fe to Si is in the range of 1.1 to 1.3. By controlling the weight ratio of Fe to Si within this range, the mechanical properties, formability and surface quality of the aluminum foil material can be further improved.
According to another embodiment herein, there is provided a method for preparing the above-described aluminum foil material of the present invention, comprising the steps of: step S1, adding raw materials into a smelting furnace and melting the raw materials to obtain molten alloy; step S2, carrying out grain refinement, degassing and filtering on the molten alloy, and then casting and rolling the molten alloy into a cast-rolled plate; step S3, cold rolling the cast-rolled sheet into a cold-rolled blank; step S4, homogenizing the cold-rolled blank at the temperature of 520-620 ℃ to obtain a homogenized cold-rolled blank; step S5, cold rolling the homogenized cold-rolled blank into a foil-rolled blank; step S6, rolling the foil rolled blank into aluminum foil; step S7: and annealing the aluminum foil at the temperature of 200-340 ℃ to obtain the aluminum foil material.
According to the technical scheme, the effective particle-induced nucleation point which is beneficial to grain refinement is formed by controlling the content and the ratio of Fe and Si added into aluminum and the content of trace elements which are easy to cause segregation and combining the processes of homogenization treatment, rolling deformation and the like, and meanwhile, the content of Cr element which prevents recrystallization nucleation is controlled, so that the size of grains can be controlled, the mechanical property, the forming property and the surface quality of an aluminum foil material are improved, and pinholes are reduced.
For example, the homogenization treatment temperature in step S4 may be 520 ℃, 530 ℃, 540 ℃, 550 ℃, 560 ℃, 570 ℃, 580 ℃, 590 ℃, 600 ℃, 610 ℃, or 620 ℃; the heat preservation time can be more than 5 hours. The homogenization treatment is carried out within the temperature and heat preservation time range, which is more beneficial to the homogenization of the metal structure distribution, thereby improving the forming performance.
For example, the annealing temperature in step S7 may be 200 ℃, 210 ℃, 220 ℃, 230 ℃, 240 ℃, 250 ℃, 260 ℃, 270 ℃, 280 ℃, 290 ℃, 300 ℃, 310 ℃, 320 ℃, 330 ℃, or 340 ℃; the heat preservation time can be more than 2 hours. Annealing is performed within the temperature and heat preservation time ranges, which is more conducive to forming recrystallized nucleation spots, so that the size of crystal grains can be controlled, and the surface quality of the aluminum foil material is improved.
For example, in the annealing in step S7, the temperature rise rate may be 20 ℃/hr or more.
In some examples, in step S2, the thickness of the cast-rolled plate is 6.0 mm to 10.0mm. The thickness is in the range, so that the cold rolling deformation, strength and toughness of the blank subjected to subsequent processing can be better ensured, the proper supercooling degree in the casting and rolling process can be better realized, and the casting and rolling plate is ensured to be uniformly solidified.
In some examples, in step S3, the thickness of the cold rolled stock is 2.0 mm to 5.0mm. The thickness in the range can better ensure the sufficient breaking of the eutectic phase in the processing deformation energy storage and solidification process, provide microstructure preparation for subsequent heat treatment, be beneficial to obtaining the advantages of better surface quality, mechanical property and the like, and further reduce the cost.
In some examples, in step S5, the thickness of the foil rolled stock is 0.2 mm to 1.5mm. The blanks in this thickness range are well suited for producing thin products such as various types of aluminum foils, packaging films, and the like. Thinner blanks may more efficiently utilize raw materials, reduce waste and reduce cost than thicker blanks. Meanwhile, the blank with the thickness range is easier to carry out foil rolling processing, and better surface quality and mechanical property can be obtained.
In some examples, in step S6, the thickness of the aluminum foil is 0.015 mm to 0.06mm. The thickness within this range can better ensure the usability of the aluminum foil. In addition, the aluminum foil with the thickness range has important application in the fields of new energy lithium batteries, food packaging, medical packaging, cosmetic packaging, tobacco packaging, electronic products, building materials and the like.
The application is described in further detail below in connection with specific examples which are not to be construed as limiting the scope of the application as claimed.
Examples
Examples 1-8 and comparative examples 1-3 preparation of aluminum foil materials
The components and contents of the aluminum foil materials a to K are shown in table 1, and raw materials are prepared based on the components and contents of the respective aluminum foil materials shown in table 1.
Step S1, adding the prepared raw materials into a smelting furnace, heating to melt the raw materials, and stirring in the melting process to uniformly mix feed liquid in the furnace to obtain a molten alloy;
S2, carrying out online grain refinement, degassing and filtering on the molten alloy, and then casting and rolling the molten alloy into a cast-rolled plate with the thickness of 6.7mm in a double-roller crystallizer;
step S3, processing the cast-rolled plate obtained in the step 2 into a cold-rolled blank with the thickness of 3.0mm through a cold rolling mill;
Step S4, homogenizing the cold-rolled blank obtained in the step S3 at a temperature of 580 ℃, and preserving heat for 10 hours to obtain a homogenized cold-rolled blank;
Step S5, cooling the homogenized cold-rolled blank obtained in the step S4 to room temperature, and then cold-rolling the cold-rolled blank into a foil-rolled blank with the thickness of 0.3 mm;
Step S6, performing pad rolling on the foil rolled blank through an aluminum foil material rolling mill to obtain a single-sided polished aluminum foil with the thickness of 0.045 mm;
Step S7: annealing and cooling the aluminum foil material through an annealing furnace to obtain a single-zero aluminum foil material; the annealing process is that the heating rate is 40 ℃/h, the heat preservation temperature is 270 ℃, the heat preservation time is 15 h, and finally the furnace is taken out for cooling.
TABLE 1 Components of aluminum foil materials of examples 1-8 and comparative examples 1-3
Performance measurement of aluminum foil material
1. Grain size: characterizing microstructure morphology of the aluminum foil material by using FEI Apreo C field emission scanning electron microscope after mechanical polishing and electrolytic polishing, wherein the electrolytic polishing solution is perchloric acid/absolute ethyl alcohol (volume ratio) =1:9; after the test is completed, the TSL OIM Analysis software is adopted to process the original data, and the grain size is counted.
2. Tensile strength and elongation: sample preparation was performed using a cutter model JDC, sample gauge length of 100mm and width of 15mm, and then tensile test was performed on a 10 kN material tensile tester from instron company at a tensile rate of 25 mm/min for each group of five parallel samples, and an average value was selected as an experimental result.
3. Cupping value: aluminum foil material was cut into 70 x 70mm square pieces, then a cupping test was performed on a GBW-60Z cupping tester at a punching speed of 10mm/min, a clamping force of 10kN, a punch diameter of 20mm, and a force value drop of 0.6% was stopped. 4 replicates were run for each parameter and the average was taken as the final cupping value.
Table 2 shows the properties of the aluminum foil materials of examples 1-8 and comparative examples 1-3.
Table 2 properties of the aluminum foil materials of examples 1 to 8 and comparative examples 1 to 3
As can be seen from the above results, the aluminum foil materials of examples 1 to 8 having the specific compositions of the present application exhibited excellent properties in terms of tensile strength, elongation and cupping value, and the aluminum foil materials of examples 1 to 8 of the present application had a grain size of 10 μm or less, a tensile strength of 110MPa or more, an elongation of 20% or more and a cupping value of 7.2mm or more, as compared with comparative examples 1 to 3. In particular, the Cr content in comparative example 3 exceeds 0.03%, resulting in lower elongation of the aluminum foil.
Preparation of aluminum foil materials of examples 9-14 and comparative example 4
Examples 9-14 and comparative example 4 were prepared in the same manner as the aluminum foil materials of examples 1-8, except that some process parameters were changed, and the process parameters are shown in Table 3.
Examples 9 to 14 and comparative example 4 the same methods for measuring the properties of the aluminum foil materials of examples 1 to 8 were used, and the properties of each aluminum foil material are shown in Table 3.
TABLE 3 Process parameters and aluminum foil material properties for examples 9-14 and comparative example 4
From the above results, it can be seen that according to the method of the present application, the aluminum foil materials of examples 9 to 14 achieve a performance significantly superior to that of comparative example 4 by specific homogenization treatment, rolling deformation, and the like, and the aluminum foil materials of examples 9 to 14 of the present application have a grain size of 10 μm or less, a tensile strength of 110MPa or more, an elongation of 20% or more, and a cupping value of 7.2mm or more.
The above embodiments are merely descriptions of technical solutions of the present disclosure, and are not intended to limit the scope thereof. While various modifications can be made by one of ordinary skill in the art with reference to the above examples, it should be within the scope of the present disclosure without departing from the spirit of the design of the present disclosure.
The foregoing relates only to specific embodiments of the present disclosure and is not intended to limit the disclosure so that various modifications and changes may be made to the disclosure by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (7)
1. An aluminum foil material, characterized in that the aluminum foil material comprises, based on the total weight of the aluminum foil material:
1.0 wt% to 2.0 wt% Fe;
0.9 wt% to 1.8 wt% Si;
0.001 wt% to 0.05 wt% Cu;
0.001 wt% to 0.05 wt% Mn;
0.001 wt% to 0.05 wt% Mg;
0.0001 wt% to 0.03 wt% Cr;
0.001 wt% to 0.05 wt% Ti; and
The balance of Al is used for preparing the alloy,
Wherein the weight ratio of Fe to Si is in the range of 1.1 to 2.2; and
Wherein the grain size of the aluminum foil material is less than or equal to 10 mu m, the tensile strength is more than or equal to 110MPa, the elongation is more than or equal to 20%, and the cupping value is more than or equal to 7.2mm.
2. The aluminum foil material of claim 1, wherein the aluminum foil material comprises, based on the total weight of the aluminum foil material:
1.1 wt% to 1.7 wt% Fe;
1.1 wt% to 1.7 wt% Si;
0.001 wt% to 0.04 wt% Cu;
0.001 wt% to 0.04 wt% Mn;
0.001 wt% to 0.04 wt% Mg;
0.0001 wt% to 0.03 wt% Cr;
0.001 wt% to 0.04 wt% Ti; and
The balance Al.
3. The aluminum foil material of claim 1, wherein the aluminum foil material comprises, based on the total weight of the aluminum foil material:
1.2 wt% to 1.5 wt% Fe;
1.1 wt% to 1.5 wt% Si;
0.001 wt% to 0.04 wt% Cu;
0.001 wt% to 0.04 wt% Mn;
0.001 wt% to 0.04 wt% Mg;
0.0005 wt% to 0.02 wt% Cr;
0.001 wt% to 0.04 wt% Ti; and
The balance Al.
4. An aluminium foil material according to any one of claims 1 to 3, wherein the weight ratio of Fe to Si is in the range 1.1 to 1.5.
5. An aluminium foil material according to any one of claims 1 to 3, wherein the weight ratio of Fe to Si is in the range 1.1 to 1.3.
6. A method for preparing an aluminium foil material according to any one of claims 1 to 5, characterized by comprising the steps of:
step S1, adding raw materials into a smelting furnace and melting the raw materials to obtain a molten alloy;
step S2, carrying out grain refinement, degassing and filtering on the molten alloy, and then casting and rolling into a cast-rolled plate, wherein the thickness of the cast-rolled plate is 6.0 mm-10.0 mm;
s3, cold rolling the cast-rolled sheet into a cold-rolled blank, wherein the thickness of the cold-rolled blank is 2.0 mm-5.0 mm;
Step S4, homogenizing the cold-rolled blank for more than 5 hours at the temperature of 520-620 ℃ to obtain a homogenized cold-rolled blank;
S5, cold rolling the homogenized cold-rolled blank into a foil-rolled blank, wherein the thickness of the foil-rolled blank is 0.2 mm-1.5 mm;
step S6, rolling the foil rolled blank into aluminum foil;
Step S7: and (3) annealing the aluminum foil at the temperature of 200-340 ℃ for more than 2 hours to obtain the aluminum foil material, wherein the heating rate is more than 20 ℃/hour in the annealing.
7. The method according to claim 6, wherein in the step S6, the thickness of the aluminum foil is 0.015 mm to 0.06mm.
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| CN1997763A (en) * | 2003-07-21 | 2007-07-11 | 诺韦利斯公司 | Thin strips or foils of alfesi alloy |
| JP4021922B1 (en) * | 2006-11-15 | 2007-12-12 | 三菱アルミニウム株式会社 | Method for producing aluminum foil for electrolytic capacitor electrode |
| GB0915074D0 (en) * | 2009-09-01 | 2009-09-30 | Eurometal S A | A method for rolling of an aluminum alloy strip and an aluminum alloy strip, sheet and foil |
| CN102245788A (en) * | 2009-03-05 | 2011-11-16 | 东洋铝株式会社 | Aluminum alloy foil for current collector and method for producing the same |
| CN102409199A (en) * | 2011-11-15 | 2012-04-11 | 镇江鼎胜铝业股份有限公司 | Household aluminum foil material and preparation method of household aluminum foil |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1997763A (en) * | 2003-07-21 | 2007-07-11 | 诺韦利斯公司 | Thin strips or foils of alfesi alloy |
| JP4021922B1 (en) * | 2006-11-15 | 2007-12-12 | 三菱アルミニウム株式会社 | Method for producing aluminum foil for electrolytic capacitor electrode |
| CN102245788A (en) * | 2009-03-05 | 2011-11-16 | 东洋铝株式会社 | Aluminum alloy foil for current collector and method for producing the same |
| GB0915074D0 (en) * | 2009-09-01 | 2009-09-30 | Eurometal S A | A method for rolling of an aluminum alloy strip and an aluminum alloy strip, sheet and foil |
| CN102409199A (en) * | 2011-11-15 | 2012-04-11 | 镇江鼎胜铝业股份有限公司 | Household aluminum foil material and preparation method of household aluminum foil |
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