CN102744255B - Process for producing battery aluminium foil - Google Patents
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- CN102744255B CN102744255B CN201210242654.6A CN201210242654A CN102744255B CN 102744255 B CN102744255 B CN 102744255B CN 201210242654 A CN201210242654 A CN 201210242654A CN 102744255 B CN102744255 B CN 102744255B
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Abstract
The invention discloses a process for producing a battery aluminium foil. The process comprises the following steps of: (1), carrying out casting and rolling production by selecting 1070 alloyed scrap of which the scrap ratio is not more than 35%, and the rest of pure aluminium ingot to obtain a casting-rolling blank; (2), coldly rolling the casting-rolling blank to obtain an aluminium alloy belt material; (3), carrying out heat preservation on the aluminium alloy belt material at 500-560 DEG C for 8.5-9.5 hours, and intermediately annealing at 400-440 DEG C for 1.5-2.5 hours, wherein the thickness of the aluminium alloy belt material during intermediate annealing is 1.8 millimeters; and (4), rolling the intermediately annealed aluminium alloy belt material into a product with the thickness of a finished product. According to the process, the total processing rate after the intermediate annealing is increased; the work-hardening capacity of the material is enhanced; and therefore, the intensity index of the product is increased; in addition, because the annealing and temperature-increasing time is prolonged, the uniformity of the internal organization of the material is beneficial to being increased; and the process is relatively beneficial to processing of subsequent processes and the stability of the product quality.
Description
Technical field
The present invention relates to battery aluminium foil technical field, more particularly, relate to a kind of battery aluminium foil production technology.
Background technology
The purposes of aluminium foil products is very extensive, paperboard, tobacco bale dress is installed to, from wine mark, tubulation to air-conditioning, electronics, then to container, family expenses from medicine, Soft Roll, can say along with expanding economy, aluminium foil has penetrated in the middle of all trades and professions and our daily production gradually.In recent years, along with developing rapidly of electron trade, aluminium foil products starts to increase in the application of electron trade.This wherein, along with the fast development of domestic electron trade and electric automobile industry, the demand of all kinds of battery is also increasing year by year, the thing followed, and be exactly the continuous increase of the demand of Related product supporting with it, battery aluminium foil is exactly one of them.
1070 aluminium alloys refer to according to the requirement in standard GB/T/T3190-2008, corresponding alloy designations is the aluminium alloy kind of 1070, its fine aluminium content is not less than 99.70%, and the aluminium foil products produced both at home and abroad at present, fine aluminium series be mostly the alloys such as 1235,1100, its fine aluminium content is far below 1070 alloys.
Battery aluminium foil refers to be applied to the aluminium foil products producing various battery, and battery aluminium foil products is mainly used in the field such as battery of mobile phone, battery for automobile pond.This product is different from the aluminium foil products of general applications, and require that the electric conductivity of product is high, intensity is high, and surface quality is good.The main dependence on import of battery paper tinsel product of current domestic top grade.Along with developing rapidly of domestic and international electron trade, the consumption of battery aluminium foil will increase year by year, estimate in several interior years from now on, by with annual about 20% speed increment, at this rate, battery aluminium foil will become the another important kind of aluminium foil products from now on.
Adopt 1070 alloy production aluminium foil products, be a new problem for those skilled in the art, adopt original production technology to produce, there is following defect and deficiency:
1. the purity due to 1070 alloy aluminum is too high, and in casting production process, the refinement of crystal grain can be more difficult, and the probability producing coarse grain increases, and is unfavorable for the quality control on the surface of follow-up aluminium foil products;
2. the purity due to 1070 alloy aluminum is too high, and product alloying element content is on the low side, makes product strength index on the low side, is generally 140-160Mpa, and battery paper tinsel product, high-end customer requires that the intensity index of product will at more than 180Mpa;
3. by the impact of interiors of products tissue, the ductility of product than on the low side, makes the processing of subsequent process encounter difficulties compared with other alloy phase, and the strip shape quality of product, the control difficulty of surface quality increase.
Therefore, how to improve surface quality and the mechanical performance of aluminium foil products, become the technical problem that this area is urgently to be resolved hurrily.
Summary of the invention
In view of this, the invention provides a kind of battery aluminium foil production technology, to improve surface quality and the mechanical performance of aluminium foil products.
For achieving the above object, the invention provides following technical scheme:
A kind of battery aluminium foil production technology, comprises step:
1) select waste material ratio to be not more than 1070 alloyed scraps of 35%, all the other carry out casting for fine aluminium ingot, obtain cast-rolling stock;
2) above-mentioned cast-rolling stock is carried out cold rolling, obtain aluminium alloy strips;
3) aluminium alloy strips is adopted 500 ~ 560 DEG C of insulations 8.5 ~ 9.5 hours, 400 ~ 440 DEG C of insulations intermediate annealing of 1.5 ~ 2.5 hours, the thickness of described aluminium alloy strips during intermediate annealing is 1.8mm;
4) aluminium alloy strips after intermediate annealing is rolled into finished product thickness.
Preferably, in above-mentioned battery aluminium foil production technology, described 1070 alloys
inside there is the copper of 0.02%-0.04%.
Preferably, in above-mentioned battery aluminium foil production technology, intermediate annealing process is 530 DEG C of insulations 9 hours, and 420 DEG C are incubated 2 hours.
Preferably, in above-mentioned battery aluminium foil production technology, described step 4) be specially:
41) aluminium alloy strips after intermediate annealing being rolled into thickness is 0.36mm;
42) by the aluminium alloy strips mill product thickness of 0.36mm.
Preferably, in above-mentioned battery aluminium foil production technology, when finished product thickness is 0.02mm, first passage is depressed into 0.165mm by 0.36mm, second passage is depressed into 0.065mm by 0.165mm, and the 3rd passage is depressed into 0.032mm by 0.065mm, and four-pass is depressed into 0.02mm by 0.032mm.
Preferably, in above-mentioned battery aluminium foil production technology, when finished product thickness is 0.015mm, first passage is depressed into 0.2mm by 0.36mm, second passage is depressed into 0.1mm by 0.2mm, 3rd passage is depressed into 0.05mm by 0.1mm, and four-pass is depressed into 0.025mm by 0.05mm, and the 5th passage is depressed into 0.015mm by 0.025mm.
Preferably, in above-mentioned battery aluminium foil production technology, roll crown when finished product thickness is 0.02mm is 45 ‰;
Roll crown when finished product thickness is 0.015mm is 20 ‰.
As can be seen from above-mentioned technical scheme, battery aluminium foil production technology provided by the invention, brings up to 1.8mm by anneal gauge by original 1.4mm, simultaneously, the intermediate annealing process of strip adjusts, and the annealing heating-up time was extended to 8.5 ~ 9.5 hours by 7 hours.The change of anneal gauge, improves general working rate, improves the work-hardening capacity of material, thus improves the intensity index of product; The prolongation of annealing heating-up time, contributes to the uniformity improving material inside organization, is more conducive to the processing of subsequent process and the stable of product quality.
Detailed description of the invention
The invention discloses a kind of battery aluminium foil production technology, to improve surface quality and the mechanical performance of aluminium foil products.
Below in conjunction with the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The battery aluminium foil production technology that the embodiment of the present invention provides, comprises step:
1) select waste material ratio to be not more than 1070 alloyed scraps of 35%, all the other carry out casting for fine aluminium ingot, obtain cast-rolling stock;
2) above-mentioned cast-rolling stock is carried out cold rolling, obtain aluminium alloy strips;
3) aluminium alloy strips is adopted 500 ~ 560 DEG C of insulations 8.5 ~ 9.5 hours, 400 ~ 440 DEG C of insulations intermediate annealings of 1.5 ~ 2.5 hours, and the thickness of described aluminium alloy strips during intermediate annealing is 1.8mm;
4) aluminium alloy strips after intermediate annealing is rolled into finished product thickness.
Battery aluminium foil production technology provided by the invention, brings up to 1.8mm by anneal gauge by original 1.4mm, and meanwhile, the intermediate annealing process of strip adjusts, and the annealing heating-up time was extended to 8.5 ~ 9.5 hours by 7 hours.The change of anneal gauge, improves general working rate, improves the work-hardening capacity of material, thus improves the intensity index of product; The prolongation of annealing heating-up time, contributes to the uniformity improving material inside organization, is more conducive to the processing of subsequent process and the stable of product quality.
Have the copper of 0.02%-0.04% in 1070 alloys, the present invention, on the basis of original 1070 alloys, with the addition of suitable Cu element, the interpolation of Cu element, adds the forming core particle of metal inside tissue, is conducive to grain refinement, meanwhile, the tensile strength index improving material is also conducive to.After adding Cu element, alloying component proportioning still meets the requirement to 1070 alloying components in GB GB ∥ T3198-2008.
Preferably, intermediate annealing process is 530 DEG C of insulations 9 hours, and 420 DEG C are incubated 2 hours.
Step 4) be specially:
41) aluminium alloy strips after intermediate annealing being rolled into thickness is 0.36mm;
42) by the aluminium alloy strips mill product thickness of 0.36mm.
When finished product thickness is 0.02mm, the first passage is depressed into 0.165mm by 0.36mm, and the second passage is depressed into 0.065mm by 0.165mm, and the 3rd passage is depressed into 0.032mm by 0.065mm, and four-pass is depressed into 0.02mm by 0.032mm.
When finished product thickness is 0.015mm, the first passage is depressed into 0.2mm by 0.36mm, and the second passage is depressed into 0.1mm by 0.2mm, and the 3rd passage is depressed into 0.05mm by 0.1mm, and four-pass is depressed into 0.025mm by 0.05mm, and the 5th passage is depressed into 0.015mm by 0.025mm.
Road sub-distribution after table 1 1070 alloy cell paper tinsel improves
Rolling pressure distribution for aluminium foil operation adjusts, main thought improves roughing pass reduction, reduce finishing pass working modulus, its main cause is: owing to the addition of Cu element and have adjusted middle anneal gauge, the intensity of material is greatly improved, at this moment suitably reduce the pass reduction of final pass, contribute to stable rolling speed, reduce surface band oil defect.
Roll crown when finished product thickness is 0.02mm is 45 ‰; Roll crown when finished product thickness is 0.015mm is 20 ‰.
Table 2 0.02mm battery paper tinsel working roll parameter adjustment situation
Table 3:0.015mm battery paper tinsel working roll parameter adjustment situation
The present invention reduces the roughness range of shaping roll, and make control more accurate, for 0.02mm product, final pass is used shaping roll instead and produced, and improves local, surface flatness defect.For 0.015mm product, reduce roll crown, suitably improve surface roughness, change product strip shape quality.
In step 1) in:
Melt quality controls
1. furnace charge will keep clean, and melt quality is good, meets aluminium foil production requirement;
2. hydrogen content controls :≤0.12ml/100gAl;
Strip shape quality controls
1. poor with plate: 0 ~ 0.05mm;
2. longitudinal plate is poor: 0 ~ 0.15mm;
3. camber: 0 ~ 0.05mm;
4. plate shape curve: parabolic shape, without defects such as clapboard, ribs thick (notch board);
Casting-milling technology parameter
1. roll casting speed: 900-1200mm/min;
2. roll: 65-72mm.
In step 2) in:
Strip shape quality controls
1., after changing working roll at every turn, preheated nip roll be adhered to more than 10 minutes, before final pass, first will produce thick material 2 ~ 3 volume, to improve roller heat convex degree learning, stablize roll shape;
2. according to width and the alloy kind of product, suitable Strip Shape Control curve is selected, to guarantee strip shape quality;
3. guarantee that plat control system is normal: during each replacing backing roll, confirm the normal condition of shower valve and magnetic valve, note abnormalities process in time;
Quality control on the surface
1. adopt clean rag to clean out aluminium volume surface dirt before material loading, every time all adopts clean rag to wipe clearly one time to milling train deflector roll, answers the greasy filth of periodic cleaning gateway dolly, step rate trolley surface, foreign matter to keep trolley surface clean;
2. roll change is carried out in strict accordance with roll change program;
3. should sample before going out finished product with clear and definite roll state, whether meet the surface requirements of product, the inspection being rolled into product by head avoids batch appearance with the product of the defects such as roll impression, striated surface;
4. guarantee that ROLLING OIL filtration system is normal, to guarantee rolled surface quality;
5. removed the foreign matter of sleeve surface by polishing, when occurring that bottoming rises stupefied, cut off and ensure that bottoming quality does not form sleeve impression or bottoming rises stupefied;
6. go up before machine rolling and check end face situation, and the protrusion to end face processes with emery cloth or cotton, effects on surface is dirtier or ravage bad outer ring and should carry out excising or taking off material, guarantees that the operation of rolling does not produce without metal or nonmetal press-in.
In this description, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (3)
1. a battery aluminium foil production technology, is characterized in that, comprise step:
1) select waste material ratio to be not more than 1070 alloyed scraps of 35%, all the other carry out casting for fine aluminium ingot, obtain cast-rolling stock;
2) above-mentioned cast-rolling stock is carried out cold rolling, obtain aluminium alloy strips;
3) adopted by aluminium alloy strips 530 DEG C to be incubated 9 hours, 420 DEG C of insulations intermediate annealings of 2 hours, and the thickness of described aluminium alloy strips during intermediate annealing is 1.8mm;
4) aluminium alloy strips after intermediate annealing is rolled into finished product thickness;
Described step 4) be specially:
41) aluminium alloy strips after intermediate annealing being rolled into thickness is 0.36mm;
42) by the aluminium alloy strips mill product thickness of 0.36mm;
When finished product thickness is 0.02mm, the first passage is depressed into 0.165mm by 0.36mm, and the second passage is depressed into 0.065mm by 0.165mm, and the 3rd passage is depressed into 0.032mm by 0.065mm, and four-pass is depressed into 0.02mm by 0.032mm;
When finished product thickness is 0.015mm, the first passage is depressed into 0.2mm by 0.36mm, and the second passage is depressed into 0.1mm by 0.2mm, and the 3rd passage is depressed into 0.05mm by 0.1mm, and four-pass is depressed into 0.025mm by 0.05mm, and the 5th passage is depressed into 0.015mm by 0.025mm.
2. battery aluminium foil production technology according to claim 1, is characterized in that, has the copper of 0.02%-0.04% in described 1070 alloyed scraps.
3. battery aluminium foil production technology according to claim 1, is characterized in that, roll crown when finished product thickness is 0.02mm is 45 ‰;
Roll crown when finished product thickness is 0.015mm is 20 ‰.
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Cited By (1)
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| CN109759474A (en) * | 2018-12-25 | 2019-05-17 | 杭州五星铝业有限公司 | A kind of preparation method of double-face optical aluminum foil |
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| CN103084805B (en) * | 2013-01-15 | 2016-09-07 | 洛阳龙鼎铝业有限公司 | A kind of 1235 double zero foil production process |
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Effective date of registration: 20220307 Address after: 072750 Zhenan Temple south, Zhuozhou City, Hebei Province Patentee after: NORTH CHINA ALUMINIUM Co.,Ltd. Patentee after: Hebei Xingheng New Material Technology Co., Ltd Address before: 072750 Zhuozhou Hebei Huabei Aluminium Industry Co., Ltd. Patentee before: NORTH CHINA ALUMINIUM Co.,Ltd. Patentee before: Qinhuangdao Xingheng Aluminum Technology Co., Ltd |
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