CN115323223A - Processing method for preparing foil blank of 1235 aluminum alloy new energy battery - Google Patents
Processing method for preparing foil blank of 1235 aluminum alloy new energy battery Download PDFInfo
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- CN115323223A CN115323223A CN202210894300.3A CN202210894300A CN115323223A CN 115323223 A CN115323223 A CN 115323223A CN 202210894300 A CN202210894300 A CN 202210894300A CN 115323223 A CN115323223 A CN 115323223A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- 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
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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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
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- 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
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- 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
Abstract
The invention relates to the technical field of preparation and processing of new energy battery foil blanks of aluminum alloy strips, in particular to a processing method for preparing 1235 aluminum alloy new energy battery foil blanks, which is characterized in that electrolytic aluminum liquid is directly cast and rolled to prepare the 1235 aluminum alloy new energy battery foil blanks, and the blanks comprise the following alloy elements in percentage by mass: fe:0.380% -0.450%, si: 0.100-0.150%, cu: 0.100-0.150%, ti:0.015% -0.030%, mn: less than or equal to 0.010 percent, zn: less than or equal to 0.010 percent, mg: less than or equal to 0.010 percent and Al:99.300%; the processing method comprises smelting, reversing, casting and rolling, cogging and cold rolling, intermediate annealing, intermediate cold rolling, finished product cold rolling, trimming and finished product slitting treatment, the invention effectively solves the problem of softer material of the copper alloy roller sleeve, effectively solves the problem of less nucleation particles of electrolytic aluminum liquid, and eliminates non-equilibrium solidification phase in the produced 1235 aluminum alloy new energy battery casting and rolling blank, and the precipitated phase is more uniform, fine and completely diffused, so as to further achieve the purpose of improving the mechanical property of the blank and finally obtain the new energy battery foil blank meeting the requirements.
Description
Technical Field
The invention relates to the technical field of preparation and processing of new energy battery foil blanks of aluminum alloy strips, in particular to a processing method for preparing foil blanks of 1235 aluminum alloy new energy batteries, which is used for preparing foil blanks of 1235 aluminum alloy new energy batteries by directly casting and rolling electrolytic aluminum liquid.
Background
The battery-grade aluminum foil is commonly used as a current collector of a lithium ion battery anode, the thickness requirement is controlled to be 10-15 mu m, and compared with the common aluminum foil, the aluminum foil used as the battery current collector has higher requirement, wherein the aluminum foil has lower roughness, better conductivity, tensile strength and elongation while the thickness is continuously reduced, and has higher requirement on the consistency and stability of products. Therefore, the battery aluminum foil has high requirements on equipment and technology, high processing difficulty and highest added value in all aluminum foil products, and has a certain barrier to entry.
At present, the aluminum alloy with higher purity such as 1060, 1100 and the like is mainly used for preparing the battery aluminum foil in China, most aluminum alloy is prepared by remelting aluminum ingots basically, and the 1235 alloy has relatively less impurities and is used for preparing the battery aluminum foil, and the main defects at present are as follows: in the process that the cold-rolled blank is transported to a downstream customer for subsequent battery foil processing, the main technical problems of aluminum foil for the 1235 battery are the problems of belt breakage, low elongation, overproof aluminum foil pinholes, bright crystal defects and the like.
Disclosure of Invention
The invention aims to provide a processing method for preparing a foil blank of a 1235 aluminum alloy new energy battery, which is used for preparing the foil blank of the 1235 aluminum alloy new energy battery by directly casting and rolling electrolytic aluminum liquid.
In order to achieve the effect, in the processing method for preparing the 1235 aluminum alloy new energy battery foil blank, the blank is subjected to component proportioning based on the 1235 aluminum alloy, and the alloy elements comprise the following components in percentage by mass: fe:0.380% -0.450%, si: 0.100-0.150%, cu: 0.100-0.150%, ti:0.015% -0.030%, mn: less than or equal to 0.010 percent, zn: less than or equal to 0.010 percent, mg: less than or equal to 0.010 percent and Al:99.300%.
The processing method for preparing the foil blank of the 1235 aluminum alloy new energy battery comprises the following steps of:
s1, smelting:
s1.1. Use Al: more than 99.70 percent of electrolytic primary aluminum liquid and 99.70 percent of remelting aluminum ingot with the mark of Al99.70 percent are taken as raw materials, wherein the proportion range of the Al99.70 percent of remelting aluminum ingot solid material accounts for 55 to 60 percent of the total weight of the melt; placing the feedstock in a furnace;
s1.2, when the furnace burden is melted by about 1/2, the furnace burden is pushed to be flat;
s1.3, after the furnace burden is completely melted, removing the surface scum when the temperature of aluminum liquid reaches over 710 ℃; electromagnetically stirring for 3-5 min after slagging off, and sampling after stirring;
s1.4, carrying out component assay according to the sampling in the step S1.3, heating the aluminum liquid to 735-740 ℃, and adjusting the melt components to a smelting target value after heating: fe:0.40%, si:0.130%, cu:0.120 percent, then keeping the temperature of the aluminum liquid at 730-740 ℃, and carrying out primary powder spraying refining by using argon and 1.3kg/t remelting type particle refining agent;
s1.5, standing for 20min after the step S1.4 is finished, slagging off, electromagnetically stirring for 3-5 min after slagging off, and sampling and testing the components of the aluminum liquid after stirring;
s1.6, adding aluminum-silicon, aluminum-iron, aluminum-titanium and aluminum-copper intermediate alloys according to the difference value of the components of the aluminum liquid tested in the step S1.5 until the components are qualified;
s1.7, after the components are qualified, heating the aluminum liquid to 740-750 ℃, and performing secondary powder spraying refining by using argon and 1.0kg/t remelting type particle refining agent;
s1.8, standing for 20min after refining in the step S1.7 is completed, slagging off after standing until the surface of the aluminum liquid is a mirror surface, and then turning over;
s2, turning over the furnace:
s2.1, after the step S1.8 is finished, carrying out over-current refining on the aluminum liquid; adding aluminum-titanium alloy into the chute in a blocking manner in the furnace reversing process; the step requires that Ti element is added into the smelting furnace and is controlled to be 0.008-0.010 percent, and the key point is to improve the absorption rate of Ti in the online grain refiner; s2.2, performing primary refining within 40min after the step S2.1 is completed, wherein no cold charge is added in the primary refining, refining for 12min by using a remelting type particle refining agent of argon gas and 0.6kg/t, slagging off after refining, and sampling and testing components after the surface of aluminum liquid is in a mirror surface state;
s2.3, refining for 4-5h, wherein 80-120 kg of same alloy cast-rolling sample plate is added before each refining;
s3, casting and rolling:
s3.1, casting and rolling the melt by adopting a double-roller inclined casting and rolling machine, wherein the casting and rolling machine adopts a double-copper alloy steel roller sleeve, and the roughness of a copper roller is set to be 0.80-0.90 mu m;
s3.2, opening a furnace eye after the step S2 is finished, enabling aluminum liquid to flow into an online degassing box, setting the temperature of the degassing box to be 720-730 ℃, introducing two paths of gas, wherein the two paths of gas are argon with the purity of 99.995%, one path of the two paths of gas is degassed, the gas pressure is 0.4-0.6 MPa, the gas flow is more than or equal to 200L/min, the temperature is 20 ℃, and the rotating speed of a rotor is 500-550 rpm/min; the other of the two paths of gas is used as covering gas for liquid level protection, the gas pressure is more than or equal to 0.2MPa, the gas flow is more than or equal to 50L/min, and the temperature is 20 ℃;
s3.3, adding an on-line grain refiner, namely adding an A-grade Al-5Ti-1B alloy wire at the inlet of a degassing tank in a swinging mode, and keeping the temperature of an aluminum liquid at a adding point within 718 +/-3 ℃;
s3.4, deslagging by adopting a double-layer plate type filter box, wherein the specification of the filter plate is 40 ppi +50ppi, and the temperature of the filter box is stable and accurate to ensure that the temperature of a front box is stable; the front box adopts a high-precision laser flow control system to control the liquid level height, the temperature of the front box is controlled to be 694-698 ℃, and the cooling water temperature is 30-35 ℃; the length of the casting and rolling area is 40 mm-45 mm, the roll gap is set to be 5.40-5.50, and the casting and rolling speed is controlled to be 950 mm/min +/-50 mm/min;
s3.5, obtaining a cast-rolled blank which has the thickness of 7.0 mm +/-0.2 mm, the hydrogen content of less than or equal to 0.10ml/100gAl, the grain size of 1 grade, the convexity of less than or equal to 0.03mm, the same plate difference of less than or equal to 0.03mm, the thickness difference of two sides of less than or equal to 0.02mm, the difference of two adjacent points of less than or equal to 0.02mm, the longitudinal difference of one circle of less than or equal to 0.10 mm and has no process crack edge;
s4, cogging and cold rolling:
rolling the blank obtained in the step S4 to a thickness specification of 3.8mm +/-1 mm by a cold rolling cogging mill, wherein an upper flat roll, a lower flat roll, a roughness value of 0.65 +/-0.02 mu m and an upper convex value of 0.03mm are adopted as cold rolling rolls;
s5, intermediate annealing: the blank subjected to the step S5 is annealed by an annealing furnace,
s5.1, setting the temperature of furnace gas in an annealing furnace to be 550 ℃;
s5.2, adjusting the temperature of furnace gas to 530 ℃ when the temperature of the metal is increased to 530 ℃, preserving the heat for 5h, cooling the furnace for 2h, and discharging the furnace;
the purpose of the step is to improve the mechanical property of the cold-rolled blank while eliminating the non-equilibrium phase caused in the casting and rolling production process and inhibiting the appearance of needle-shaped second phase;
s6, intermediate cold rolling:
s6.1, rolling the blank finished in the step S6 to a cold-rolled semi-finished blank with the thickness specification of 0.5mm by adopting an intermediate cold rolling mill according to the rolling process sequence of 3.8mm to 1.8mm to 0.9mm to 0.5mm,
s6.2, cooling;
s6.3, adopting a double-convexity roller as a cold roller, wherein the surface roughness value is 0.45 micrometers +/-0.02 micrometers, and the convexity of an upper roller and the convexity of a lower roller are both 0.02mm;
s7, cold rolling of finished products:
s7.1, after the cold-rolled semi-finished blank in the step S6 is cooled to below 60 ℃, transferring the blank into a finished product cold-rolling mill to roll the blank into a battery foil cold-rolled finished blank;
s7.2, adopting a double-convexity roller as the cold roller, wherein the surface roughness value is 0.35 mu m +/-0.02 mu m, and the convexity of the upper roller and the convexity of the lower roller are both 0.02mm;
s7.3, controlling the thickness of the battery foil cold-rolled finished blank to be 0.21 mm +/-0.01 mm;
s8, trimming and cutting finished products: and (5) performing trimming and finished product slitting treatment on the battery foil cold-rolled finished product which is subjected to the step S7 through a recoiler.
Further, the time of each time of the first powder spraying refining of the S1.4 and the second powder spraying refining of the S1.7 in the step S1 is more than or equal to 32min, all alloy elements are added in a manner of master alloy, and the aluminum-titanium alloy in the step S2 is placed in a chute 2min before the furnace is turned down. The aluminum-titanium intermediate alloy is placed in the chute 2min before furnace reversal, the absorption efficiency is improved by means of the scouring of the aluminum liquid in the furnace reversal process, and then invalid Ti inclusion elements can be reduced to enter the aluminum melt, so that the purity of the melt is further improved.
Further, in the step S2.1, the down-converter temperature is set to 750 ℃ to 755 ℃.
Furthermore, the addition amount of the wire grain refiner in the step S3.3 is 1.2 kg/t-1.6 kg/t, and the swinging frequency of the swinging mode is 10 times/min-20 times/min.
Further, in the step S3.4, the front box adopts a high-precision laser flow control system to control the liquid level height, and the fluctuation range of the liquid level height is less than or equal to +/-0.3 mm.
The invention has the beneficial effects that:
according to the invention, the 1235 aluminum alloy new energy battery foil blank is prepared by casting and rolling the copper alloy roller sleeve, the characteristic of strong heat transfer capability of the copper alloy roller sleeve is fully utilized, the casting and rolling force is further reduced by reducing the casting and rolling area, and the problem of soft material of the copper alloy roller sleeve is effectively solved; meanwhile, the problem of few nucleation particles of electrolytic aluminum liquid is effectively solved by utilizing the heat transfer efficiency of the copper alloy roller sleeve and auxiliary process measures, and a casting and rolling strip blank with fine and uniform grains is prepared; in addition, by utilizing a high-temperature homogenization annealing process, the nonequilibrium solidified phase in the cast-rolled blank of the 1235 aluminum alloy new energy battery is eliminated, and precipitated phases are more uniform, fine and completely diffused, so that the aim of improving the mechanical property of the blank is further fulfilled.
The tensile strength of the cold-rolled base material for the 1235 aluminum alloy new energy battery is not less than 180MPa, the elongation after fracture is not less than 4.5%, and the mechanical property meets the H18 state performance requirement of the 1235 aluminum alloy strip in GB/T3880.2-2012.
Detailed Description
In the processing method for preparing the foil blank of the 1235 aluminum alloy new energy battery, the blank is subjected to component proportioning based on the 1235 aluminum alloy, and the alloy elements comprise the following components in percentage by mass: fe:0.380% -0.450%, si:0.100% to 0.150%, cu: 0.100-0.150%, ti:0.015% -0.030%, mn: less than or equal to 0.010 percent, zn: less than or equal to 0.010 percent, mg: less than or equal to 0.010 percent and Al:99.300%.
The processing method for preparing the foil blank of the 1235 aluminum alloy new energy battery comprises the following steps of:
s1, smelting:
s1.1. Use of Al: more than 99.70 percent of electrolytic primary aluminum liquid and 99.70 percent of remelting aluminum ingot with the mark of Al99.70 percent are taken as raw materials, wherein the proportion range of the Al99.70 percent of remelting aluminum ingot solid material accounts for 55 to 60 percent of the total weight of the melt; placing the feedstock in a furnace;
s1.2, when the furnace burden is melted by about 1/2, the furnace burden is pushed to be flat;
s1.3, after the furnace burden is completely melted, removing the surface scum when the temperature of aluminum liquid reaches over 710 ℃; carrying out electromagnetic stirring for 3-5 min after slagging off, and sampling after stirring;
s1.4, carrying out component assay according to the sampling in the step S1.3, heating the aluminum liquid to 735-740 ℃, and adjusting the melt components to a smelting target value after heating: fe:0.40%, si:0.130%, cu:0.120 percent, then keeping the temperature of the aluminum liquid at 730-740 ℃, and carrying out primary powder spraying refining by using argon and 1.3kg/t remelting type particle refining agent;
s1.5, standing for 20min after the step S1.4 is finished, slagging off, electromagnetically stirring for 3-5 min after slagging off, and sampling and testing the components of the aluminum liquid after stirring;
s1.6, adding aluminum-silicon, aluminum-iron, aluminum-titanium and aluminum-copper intermediate alloys according to the difference value of the components of the aluminum liquid tested in the step S1.5 until the components are qualified;
s1.7, after the components are qualified, heating the aluminum liquid to 740-750 ℃, and performing secondary powder spraying refining by using argon and 1.0kg/t remelting type particle refining agent;
s1.8, standing for 20min after refining in the step S1.7 is completed, slagging off after standing until the surface of the aluminum liquid is a mirror surface, and then turning over;
s2, turning down the furnace:
s2.1, after the step S1.8 is finished, carrying out over-current refining on the aluminum liquid; adding aluminum-titanium alloy into the chute in a blocking manner in the furnace reversing process; the step requires that Ti element is added into the smelting furnace and is controlled to be 0.008-0.010 percent, and the key point is to improve the absorption rate of Ti in the online grain refiner; s2.2, performing primary refining within 40min after the step S2.1 is completed, wherein no cold charge is added in the primary refining, refining for 12min by using a remelting type particle refining agent of argon gas and 0.6kg/t, slagging off after refining, and sampling and testing components after the surface of aluminum liquid is in a mirror surface state;
s2.3, refining for 4-5h, and adding 80-120 kg of same alloy cast-rolling sample plate before each refining;
s3, casting and rolling:
s3.1, casting and rolling the melt by adopting a double-roller inclined casting and rolling machine, wherein the casting and rolling machine adopts a double-copper alloy steel roller sleeve, and the roughness of a copper roller is set to be 0.80-0.90 mu m;
s3.2, opening a furnace eye after the step S2 is finished, enabling aluminum liquid to flow into an online degassing box, setting the temperature of the degassing box to be 720-730 ℃, introducing two paths of gas, wherein the two paths of gas are argon with the purity of 99.995%, one path of the two paths of gas is degassed, the gas pressure is 0.4-0.6 MPa, the gas flow is more than or equal to 200L/min, the temperature is 20 ℃, and the rotating speed of a rotor is 500-550 rpm/min; the other of the two paths of gas is used as covering gas for liquid level protection, the gas pressure is more than or equal to 0.2MPa, the gas flow is more than or equal to 50L/min, and the temperature is 20 ℃;
s3.3, adding an A-grade Al-5Ti-1B alloy wire into an online grain refiner at an inlet of a degassing tank in a swinging mode, and keeping the temperature of an aluminum liquid at a adding point at 718 +/-3 ℃;
s3.4, deslagging by adopting a double-layer plate type filter box, wherein the specification of the filter plate is 40 ppi +50ppi, and the temperature of the filter box is stable and accurate to ensure the temperature of the front box; the front box adopts a high-precision laser flow control system to control the liquid level height, the temperature of the front box is controlled to be 694-698 ℃, and the cooling water temperature is 30-35 ℃; the length of the casting and rolling area is 40 mm-45 mm, the roll gap is set to be 5.40-5.50, and the casting and rolling speed is controlled to be 950 mm/min +/-50 mm/min;
s3.5, obtaining a cast-rolled blank which has the thickness of 7.0 mm +/-0.2 mm, the hydrogen content of less than or equal to 0.10ml/100gAl, the grain size of 1 grade, the convexity of less than or equal to 0.03mm, the same plate difference of less than or equal to 0.03mm, the thickness difference of two sides of less than or equal to 0.02mm, the difference of two adjacent points of less than or equal to 0.02mm, the longitudinal difference of one circle of less than or equal to 0.10 mm and has no process crack edge;
s4, cogging and cold rolling:
rolling the blank obtained in the step S4 to a thickness specification of 3.8mm +/-1 mm by a cold rolling cogging mill, wherein an upper flat roll, a lower flat roll, a roughness value of 0.65 +/-0.02 mu m and an upper convex value of 0.03mm are adopted as cold rolling rolls;
s5, intermediate annealing: the blank subjected to the step S5 is annealed by an annealing furnace,
s5.1, setting the temperature of furnace gas in an annealing furnace to be 550 ℃;
s5.2, adjusting the temperature of furnace gas to 530 ℃ when the temperature of the metal is increased to 530 ℃, preserving heat for 5h, cooling the furnace for 2h with the furnace, and discharging the furnace;
the purpose of the step is to improve the mechanical property of the cold-rolled blank while eliminating the non-equilibrium phase caused in the casting and rolling production process and inhibiting the appearance of needle-shaped second phase;
s6, intermediate cold rolling:
s6.1, rolling the blank finished in the step S6 to a cold-rolled semi-finished blank with the thickness specification of 0.5mm by adopting an intermediate cold rolling mill according to the rolling process sequence of 3.8mm to 1.8mm to 0.9mm to 0.5mm,
s6.2, cooling;
s6.3, adopting a double-convexity roller as a cold roller, wherein the surface roughness value is 0.45 mu m +/-0.02 mu m, and the convexity of the upper roller and the convexity of the lower roller are both 0.02mm;
s7, cold rolling of finished products:
s7.1, after the cold-rolled semi-finished blank in the step S6 is cooled to below 60 ℃, transferring the blank into a finished product cold-rolling mill to roll the blank into a battery foil cold-rolled finished blank;
s7.2, adopting a double-convexity roller as the cold roller, wherein the surface roughness value is 0.35 micrometers +/-0.02 micrometers, and the convexity of the upper roller and the convexity of the lower roller are both 0.02mm;
s7.3, controlling the thickness of the battery foil cold-rolled finished blank to be 0.21 mm +/-0.01 mm;
s8, trimming and cutting finished products: and (5) performing trimming and finished product slitting treatment on the battery foil cold-rolled finished product which is subjected to the step S7 through a recoiler.
Further, the time length of each of the first powder injection refining of S1.4 and the second powder injection refining of S1.7 in the step S1 is more than or equal to 32min, all alloy elements are added in a manner of intermediate alloy, and the aluminum-titanium alloy in the step S2 is placed in a chute 2min before the furnace is turned down. The aluminum-titanium intermediate alloy is placed in the chute 2min before furnace reversal, the absorption efficiency of the aluminum-titanium intermediate alloy is improved by means of the washing of the aluminum liquid in the furnace reversal process, and then ineffective Ti inclusion elements can be reduced to enter the aluminum melt, so that the purity of the melt is further improved.
Further, in the step S2.1, the down-converter temperature is set to 750 ℃ to 755 ℃.
Furthermore, the addition amount of the wire grain refiner in the step S3.3 is 1.2 kg/t-1.6 kg/t, and the swinging frequency of the swinging mode is 10 times/min-20 times/min.
Further, in the step S3.4, the front box adopts a high-precision laser flow control system to control the liquid level height, and the fluctuation range of the liquid level height is less than or equal to +/-0.3 mm.
And (4) thoroughly washing the rolling mill before performing the cogging cold rolling in the step S4, the intermediate cold rolling in the step S6 and the finished product cold rolling in the step S7.
And S7, adopting 90# rolling oil in the cold rolling of the finished product.
The tensile strength of the cold-rolled base material for the 1235 aluminum alloy new energy battery is not less than 180MPa, the elongation after fracture is not less than 4.5%, and the mechanical property meets the H18 state performance requirement of the 1235 aluminum alloy strip in GB/T3880.2-2012.
A plant using the method of the invention, the cold rolling process is as follows:
finally obtaining the 1235 aluminum alloy new energy battery cold rolling base material with the tensile strength of 185MPa and the elongation after fracture of 4.5 percent.
Claims (6)
1. A processing method for preparing a foil blank of a 1235 aluminum alloy new energy battery is characterized by comprising the following steps of: the blank is prepared from 1235 aluminum alloy in the following components in percentage by mass: fe:0.380% -0.450%, si:0.100% to 0.150%, cu: 0.100-0.150%, ti:0.015% -0.030%, mn: less than or equal to 0.010 percent, zn: less than or equal to 0.010 percent, mg: less than or equal to 0.010 percent and Al:99.300%.
2. The processing method for preparing the 1235 aluminum alloy new energy battery foil blank according to the claim 1, wherein the processing method comprises the following steps: the method comprises the following steps:
s1, smelting:
s1.1. Use of Al: more than 99.70 percent of electrolytic primary aluminum liquid and 99.70 percent of remelting aluminum ingot with the mark of Al99.70 percent are taken as raw materials, wherein the proportion range of the Al99.70 percent of remelting aluminum ingot solid material accounts for 55 to 60 percent of the total weight of the melt; placing the feedstock in a furnace;
s1.2, when the furnace burden is molten by about 1/2, pushing the furnace burden flat;
s1.3, after the furnace burden is completely melted, removing the surface scum when the temperature of aluminum liquid reaches over 710 ℃; electromagnetically stirring for 3-5 min after slagging off, and sampling after stirring;
s1.4, carrying out component assay according to the sampling in the step S1.3, heating the aluminum liquid to 735-740 ℃, and adjusting the melt components to a smelting target value after heating: fe:0.40%, si:0.130%, cu:0.120 percent, then keeping the temperature of the aluminum liquid at 730-740 ℃, and carrying out primary powder spraying refining by using argon and 1.3kg/t remelting type particle refining agent;
s1.5, standing for 20min after the step S1.4 is finished, slagging off, electromagnetically stirring for 3-5 min after slagging off, and sampling and testing the components of the aluminum liquid after stirring;
s1.6, adding aluminum-silicon, aluminum-iron, aluminum-titanium and aluminum-copper intermediate alloys according to the difference value of the components of the aluminum liquid tested in the step S1.5 until the components are qualified;
s1.7, after the components are qualified, heating the aluminum liquid to 740-750 ℃, and performing secondary powder spraying refining by using argon and 1.0kg/t remelting type particle refining agent;
s1.8, standing for 20min after refining in the step S1.7 is completed, slagging off after standing until the surface of the aluminum liquid is a mirror surface, and then turning over;
s2, turning over the furnace:
s2.1, after the step S1.8 is finished, carrying out over-current refining on the aluminum liquid; adding aluminum-titanium alloy into the chute in a blocking manner in the furnace reversing process; the step requires that Ti element is added into the smelting furnace and is controlled to be 0.008-0.010 percent, and the key point is to improve the absorption rate of Ti in the online grain refiner;
s2.2, performing primary refining within 40min after S2.1 is finished, refining for 12min by using argon and 0.6kg/t remelting type particle refining agent without adding a cold material, slagging off after refining, and sampling and testing components after the surface of aluminum liquid is in a mirror surface state;
s2.3, refining for 4-5h, and adding 80-120 kg of same alloy cast-rolling sample plate before each refining;
s3, casting and rolling:
s3.1, casting and rolling the melt by adopting a double-roller inclined casting and rolling machine, wherein the casting and rolling machine adopts a double-copper alloy steel roller sleeve, and the roughness of a copper roller is set to be 0.80-0.90 mu m;
s3.2, opening a furnace eye after the step S2 is finished, enabling aluminum liquid to flow into an online degassing box, setting the temperature of the degassing box to be 720-730 ℃, introducing two paths of gas, wherein the two paths of gas are argon with the purity of 99.995%, one path of the two paths of gas is degassed, the gas pressure is 0.4-0.6 MPa, the gas flow is more than or equal to 200L/min, the temperature is 20 ℃, and the rotating speed of a rotor is 500-550 rpm/min; the other of the two paths of gas is used as covering gas for liquid level protection, the gas pressure is more than or equal to 0.2MPa, the gas flow is more than or equal to 50L/min, and the temperature is 20 ℃;
s3.3, adding an on-line grain refiner, namely adding an A-grade Al-5Ti-1B alloy wire at the inlet of a degassing tank in a swinging mode, and keeping the temperature of an aluminum liquid at a adding point within 718 +/-3 ℃;
s3.4, deslagging by adopting a double-layer plate type filter box, wherein the specification of the filter plate is 40 ppi +50ppi, and the temperature of the filter box is stable and accurate to ensure the temperature of the front box; the front box adopts a high-precision laser flow control system to control the liquid level height, the temperature of the front box is controlled to be 694-698 ℃, and the cooling water temperature is 30-35 ℃; the length of the casting and rolling area is 40 mm-45 mm, the roll gap is set to be 5.40-5.50, and the casting and rolling speed is controlled to be 950 mm/min +/-50 mm/min;
s3.5, obtaining a cast-rolled blank which has the thickness of 7.0 mm +/-0.2 mm, the hydrogen content of less than or equal to 0.10ml/100gAl, the grain size of 1 grade, the convexity of less than or equal to 0.03mm, the same plate difference of less than or equal to 0.03mm, the thickness difference of two sides of less than or equal to 0.02mm, the difference of two adjacent points of less than or equal to 0.02mm, the longitudinal difference of one circle of less than or equal to 0.10 mm and has no process crack edge;
s4, cogging and cold rolling:
rolling the blank obtained in the step S4 to a thickness specification of 3.8mm +/-1 mm by a cold rolling cogging mill, wherein an upper flat roll, a lower flat roll, a roughness value of 0.65 +/-0.02 mu m and an upper convex value of 0.03mm are adopted as cold rolling rolls;
s5, intermediate annealing: the blank subjected to the step S5 is annealed by an annealing furnace,
s5.1, setting the temperature of furnace gas in an annealing furnace to be 550 ℃;
s5.2, adjusting the temperature of furnace gas to 530 ℃ when the temperature of the metal is increased to 530 ℃, preserving the heat for 5h, cooling the furnace for 2h, and discharging the furnace;
s6, intermediate cold rolling:
s6.1, rolling the blank finished in the step S6 to a cold-rolled semi-finished blank with the thickness specification of 0.5mm by adopting an intermediate cold rolling mill according to the rolling process sequence of 3.8mm to 1.8mm to 0.9mm to 0.5mm,
s6.2, cooling;
s6.3, adopting a double-convexity roller as a cold roller, wherein the surface roughness value is 0.45 mu m +/-0.02 mu m, and the convexity of the upper roller and the convexity of the lower roller are both 0.02mm;
s7, cold rolling of finished products:
s7.1, after the cold-rolled semi-finished blank in the step S6 is cooled to below 60 ℃, transferring the blank into a finished product cold-rolling mill to roll the blank into a battery foil cold-rolled finished blank;
s7.2, adopting a double-convexity roller as the cold roller, wherein the surface roughness value is 0.35 mu m +/-0.02 mu m, and the convexity of the upper roller and the convexity of the lower roller are both 0.02mm;
s7.3, controlling the thickness of the battery foil cold-rolled finished blank to be 0.21 mm +/-0.01 mm;
s8, trimming and cutting finished products: and (5) performing trimming and finished product slitting treatment on the battery foil cold-rolled finished product which is subjected to the step S7 through a recoiler.
3. The processing method for preparing the 1235 aluminum alloy new energy battery foil blank according to the claim 2, characterized in that: the time length of each of the first powder injection refining of S1.4 and the second powder injection refining of S1.7 in the step S1 is more than or equal to 32min, all alloy elements are added in a manner of intermediate alloy, and the aluminum-titanium alloy in the step S2 is placed in a chute 2min before the furnace is turned down.
4. The processing method for preparing the 1235 aluminum alloy new energy battery foil blank according to the claim 2, characterized in that: in the step S2.1, the temperature of the converter is set to 750-755 ℃.
5. The processing method for preparing the 1235 aluminum alloy new energy battery foil blank according to the claim 2, characterized in that: the addition amount of the wire grain refiner in the step S3.3 is 1.2 kg/t-1.6 kg/t, and the swinging frequency of the swinging mode is 10 times/min-20 times/min.
6. The processing method for preparing the 1235 aluminum alloy new energy battery foil blank according to the claim 5, wherein the processing method comprises the following steps: and in the step S3.4, the front box adopts a high-precision laser flow control system to control the liquid level height, and the fluctuation range of the liquid level height is less than or equal to +/-0.3 mm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117568668A (en) * | 2024-01-15 | 2024-02-20 | 中铝材料应用研究院有限公司 | Aluminum plastic film aluminum foil blank and preparation method thereof |
| CN117568668B (en) * | 2024-01-15 | 2024-04-26 | 中铝材料应用研究院有限公司 | Aluminum plastic film aluminum foil blank and preparation method thereof |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014205886A (en) * | 2013-04-12 | 2014-10-30 | 株式会社Uacj | Aluminum alloy foil for electrode collector and manufacturing method therefor |
| CN104388766A (en) * | 2014-11-27 | 2015-03-04 | 广西南南铝箔有限责任公司 | Production method of aluminum foil for lithium-ion battery |
| CN105018799A (en) * | 2015-07-15 | 2015-11-04 | 浙江中金铝业有限公司 | Aluminum foil for lithium battery |
| CN105063429A (en) * | 2015-07-15 | 2015-11-18 | 浙江中金铝业有限公司 | Method for preparing aluminum foil for lithium battery |
| CN107012370A (en) * | 2017-04-14 | 2017-08-04 | 邹平德利科技板材有限公司 | High-performance 1230A alloy lithium ion battery aluminium foils and preparation method thereof |
| CN107217175A (en) * | 2017-05-08 | 2017-09-29 | 永杰新材料股份有限公司 | A kind of battery high-performance aluminium foil and its production method |
| CN110227714A (en) * | 2019-06-25 | 2019-09-13 | 江苏大亚铝业有限公司 | Lithium battery 1235 alloy double-face optical aluminum foils and preparation method thereof |
| CN112159915A (en) * | 2020-09-27 | 2021-01-01 | 酒泉钢铁(集团)有限责任公司 | Method for preparing 1070 aluminum alloy strip blank by using copper roller sleeve casting and rolling |
| CN113667849A (en) * | 2021-06-29 | 2021-11-19 | 内蒙古联晟新能源材料有限公司 | Efficient production process of aluminum foil for battery |
| CN114525432A (en) * | 2022-01-08 | 2022-05-24 | 浙江佑丰新材料股份有限公司 | High-strength and high-extension aluminum foil for new energy battery and manufacturing method thereof |
| CN115652115A (en) * | 2022-11-01 | 2023-01-31 | 江苏万顺新富瑞科技有限公司 | Production process of high-elongation 1100 alloy battery aluminum foil |
-
2022
- 2022-07-27 CN CN202210894300.3A patent/CN115323223A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014205886A (en) * | 2013-04-12 | 2014-10-30 | 株式会社Uacj | Aluminum alloy foil for electrode collector and manufacturing method therefor |
| CN104388766A (en) * | 2014-11-27 | 2015-03-04 | 广西南南铝箔有限责任公司 | Production method of aluminum foil for lithium-ion battery |
| CN105018799A (en) * | 2015-07-15 | 2015-11-04 | 浙江中金铝业有限公司 | Aluminum foil for lithium battery |
| CN105063429A (en) * | 2015-07-15 | 2015-11-18 | 浙江中金铝业有限公司 | Method for preparing aluminum foil for lithium battery |
| CN107012370A (en) * | 2017-04-14 | 2017-08-04 | 邹平德利科技板材有限公司 | High-performance 1230A alloy lithium ion battery aluminium foils and preparation method thereof |
| CN107217175A (en) * | 2017-05-08 | 2017-09-29 | 永杰新材料股份有限公司 | A kind of battery high-performance aluminium foil and its production method |
| CN110227714A (en) * | 2019-06-25 | 2019-09-13 | 江苏大亚铝业有限公司 | Lithium battery 1235 alloy double-face optical aluminum foils and preparation method thereof |
| CN112159915A (en) * | 2020-09-27 | 2021-01-01 | 酒泉钢铁(集团)有限责任公司 | Method for preparing 1070 aluminum alloy strip blank by using copper roller sleeve casting and rolling |
| CN113667849A (en) * | 2021-06-29 | 2021-11-19 | 内蒙古联晟新能源材料有限公司 | Efficient production process of aluminum foil for battery |
| CN114525432A (en) * | 2022-01-08 | 2022-05-24 | 浙江佑丰新材料股份有限公司 | High-strength and high-extension aluminum foil for new energy battery and manufacturing method thereof |
| CN115652115A (en) * | 2022-11-01 | 2023-01-31 | 江苏万顺新富瑞科技有限公司 | Production process of high-elongation 1100 alloy battery aluminum foil |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117568668A (en) * | 2024-01-15 | 2024-02-20 | 中铝材料应用研究院有限公司 | Aluminum plastic film aluminum foil blank and preparation method thereof |
| CN117568668B (en) * | 2024-01-15 | 2024-04-26 | 中铝材料应用研究院有限公司 | Aluminum plastic film aluminum foil blank and preparation method thereof |
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