CN108435791B - It is a kind of to prepare stratiform copper/lithium composite foil deep cooling asynchronous rolling method - Google Patents
It is a kind of to prepare stratiform copper/lithium composite foil deep cooling asynchronous rolling method Download PDFInfo
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- CN108435791B CN108435791B CN201810411569.5A CN201810411569A CN108435791B CN 108435791 B CN108435791 B CN 108435791B CN 201810411569 A CN201810411569 A CN 201810411569A CN 108435791 B CN108435791 B CN 108435791B
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- 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
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- 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
- B21B1/38—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 sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
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Abstract
It is a kind of to prepare stratiform copper/lithium composite foil deep cooling asynchronous rolling method, copper foil and lithium foil are sheared into rectangularity size, copper thickness is the half of lithium foil, of same size, length is one times of lithium foil, by copper foil doubling along its length, lithium foil has been coated completely, has been put into deep cooling box cooling, then deep cooling rolling is carried out, then it is folded again, deep cooling rolling, repeats 5-10 times, produce high performance stratiform copper/Li metal composite foil；Stratiform copper/Li metal composite foil is folded, is put into deep cooling box and cools down again, deep cooling asymmetrical rolling is then carried out, until rolled piece thickness is rolled to 10~50 μm.The present invention is plastically deformed using ultralow temperature, and binding force is relatively weak between lithium metal and metallic copper, to be difficult to form intermetallic compound.At the same time, in the case of using ultralow temperature, lithium metal and metallic copper all have good plasticity, to realize that multi-pass is plastically deformed.Resulting materials are nano lamellar composite construction, have good battery attributes.
Description
Technical field
The invention belongs to metal material rolling technical fields, in particular to a kind of to prepare stratiform copper/lithium composite foil depth
Cold asynchronous rolling method.
Background technique
Currently, lithium metal obtains the great attention of academia, the world and business circles as new energy materials, and prepare cashier
Rice lithium metal composite material is also wherein important branch.Oxygen is easy to happen in heating, wet environment for pure lithium material
Change, seriously threatens the performance of material.
In addition, copper foil is widely used as common battery conductor in energy battery field.If by copper foil and lithium foil
Direct Rolling becomes laminar composite, can prepare battery material.However, being answered for pure lithium material and pure copper material
When closing rolling, since the operation of rolling is plastically deformed, material temperature is caused to increase, occurred to will lead to pure lithium material part
Oxidation, it is likely that lead to material combustion, and copper/lithium composite foil of stratiform cannot be prepared.
Summary of the invention
In order to overcome the disadvantages of the above prior art, to prepare stratiform copper/lithium compound the purpose of the present invention is to provide a kind of
The deep cooling asynchronous rolling method of foil, can prepare copper/Li metal composite foil of high quality, which is lamellar composite material
Material is copper/lithium/copper ... lithium/copper multilayer materials, and lithium and copper interface do not form compound between copper lithium metal in material.
To achieve the goals above, the technical solution adopted by the present invention is that:
It is a kind of to prepare stratiform copper/lithium composite foil deep cooling asynchronous rolling method, include the following steps:
Step 1: using pure lithium and fine copper metal foil as raw material, the half with a thickness of lithium foil of copper foil；
Step 2: copper foil and lithium foil are sheared rectangularity, the width of copper foil and lithium foil it is of same size, but length is lithium
Twice of foil length；
Step 3: copper foil doubling along its length has been coated lithium foil completely；
It is cooled down step 4: the material coated is put into deep cooling box, it is 10 minutes cooling, realize that material temperature is equal
Even cooling；
Step 5: material is taken out, deep cooling rolling, after rolling, rolled piece temperature < -50 are carried out 50% with reduction ratio
℃；
Step 6: the band after rolling doubling and overlap, be put into deep cooling box and cool down again, cooling time 3-5
Minute；
Step 7: cooling material is carried out deep cooling rolling again, reduction ratio maintains 50%；
The 6th step and the 7th step 5-10 times are repeated, high performance stratiform copper/Li metal composite foil is produced；
It is cooled down again step 8: stratiform copper/Li metal composite foil is put into deep cooling box, 3-5 minutes cooling time；
Step 9: taking out again cooling stratiform copper/Li metal composite foil carries out deep cooling asymmetrical rolling, friction speed ratio is
1.0~1.6, rolling reduction ratio is 5~20%；
The 8th step and the 9th step are repeated, until rolled piece thickness is rolled to 10~50 μm.
In the first step, before the rolling of lithium foil with a thickness of 20-100 μm, before copper foil rolling with a thickness of 10-50 μm.
The deep cooling box is cooled down using nitrogen, and cooling temperature range is -190 DEG C~-100 DEG C.
Cardinal principle of the invention is to be plastically deformed using ultralow temperature, and binding force is relatively between lithium metal and metallic copper
It is weak, to be difficult to form intermetallic compound.At the same time, in the case of using ultralow temperature, lithium metal all has good with metallic copper
Good plasticity, to realize that multi-pass is plastically deformed.
Compared with prior art, the present invention uses deep cooling pack rolling technology, is suitble to fine copper and pure lithium material.Using this method,
It is successfully prepared for copper/Li metal composite foil, which has bright prospects in fields such as battery materials.
Detailed description of the invention
Fig. 1 is the deep cooling rolling preparation flow figure of nano lamellar copper/Li metal composite foil of the present invention.
In figure: 1. copper foils；2. lithium foil；3. stacking copper/lithium composite foil；4. first stage deep cooling box, cooling using nitrogen,
Temperature is controlled at -190 DEG C to -100 DEG C；5. the copper of subzero treatment/lithium composite foil；6. copper/lithium composite foil of rolling；On 7.
Roll；8. bottom roll；9. second stage deep cooling box；10. stratiform copper/Li metal composite foil is used for asymmetrical rolling；11. different
Walk copper/lithium composite foil of rolling；12. nitrogen gun, for realizing roll low temperature；13. the topping roll of asynchronous rolling machine；14. different
Walk the bottom roll of milling train.
Specific embodiment
The embodiment that the present invention will be described in detail with reference to the accompanying drawings and examples.
As shown in Figure 1, a kind of prepare stratiform copper/lithium composite foil deep cooling asynchronous rolling method, pass through multi-pass deep cooling
Accumulation rolling, rolled piece form copper/Li metal composite foil of layer structure, the specific steps of which are as follows:
Step 1: be raw material with pure lithium foil 2 and copper foil 1, lithium foil 2 roll before with a thickness of 20-100 μm, copper foil 1 rolls
It is preceding with a thickness of 10-50 μm, the half with a thickness of lithium foil 2 of copper foil 1.
Step 2: copper foil 1 and lithium foil 2 shear rectangularity, the width of copper foil 1 is of same size with lithium foil 2, still, copper
The length of foil 1 is twice of 2 length of lithium foil.
Step 3: the doubling along its length of copper foil 1 has been coated lithium foil 2 completely, obtain stacking copper/lithium composite foil 3.
Step 4: be put into copper/lithium composite foil 3 is stacked in first stage deep cooling box 4 and cool down, it is 10 minutes cooling,
It realizes that material temperature is uniformly cooled, obtains copper/lithium composite foil 5 of subzero treatment.First stage deep cooling box 4 using nitrogen into
Row cooling, cooling temperature range are -190 DEG C~-100 DEG C.
Step 5: the copper of subzero treatment/lithium composite foil 5 is taken out, using topping roll 7 and bottom roll 8, with reduction ratio
((H-h)/H) carries out deep cooling rolling 50%, after rolling, rolled piece temperature < -50 DEG C, and the copper rolled/lithium composite foil
6。
Step 6: the copper of rolling/lithium composite foil 6 is carried out doubling along rolling direction and is overlapped, it is put into first stage depth
It is cooled down again in ice chest 4, cooling time was at 3-5 minutes.
Step 7: cooling material is carried out deep cooling rolling again, reduction ratio maintains 50%.
The 6th step and the 7th step 5-10 times are repeated, high performance stratiform copper/Li metal composite foil 10 is produced.
Step 8: stratiform copper/Li metal composite foil 10 is put into second stage deep cooling box 9 and is cooled down again, it is cooling
Time was at 5 minutes.
Step 9: taking out stratiform copper/Li metal composite foil 10 carries out deep cooling asymmetrical rolling, friction speed ratio is 1.0~
1.6, rolling reduction ratio is 5~20%, obtains copper/lithium composite foil 11 of asymmetrical rolling；Before asymmetrical rolling, nitrogen need to be used
Spray gun 12 is that the topping roll 13 of asynchronous rolling machine and the bottom roll 14 of asynchronous rolling machine are cooled down, to guarantee deep cooling effect.
The 8th step and the 9th step are repeated, until rolled piece thickness is rolled 10~50 μm.The material is nano lamellar composite junction
Structure has good battery attributes.
It is two concrete cases of the invention below.
Application case 1
50 μ m-thick stratiform copper/lithium composite foil deep cooling asymmetrical rolling preparation, steps are as follows:
Step 1: the thickness with a thickness of 100 μm, before copper rolling using pure lithium and fine copper metal foil as raw material, before lithium rolling
Degree is 50 μm.
Step 2: metal copper foil and metallic lithium foil shear rectangularity size, the width of copper foil is of same size with lithium foil,
But the length of copper foil is twice of lithium foil length.
Step 3: copper foil doubling along its length has been coated lithium foil completely.
It is cooled down step 4: the material coated is put into deep cooling box, it is 10 minutes cooling, realize that material temperature is equal
It is even cold.Deep cooling box is cooled down using nitrogen, and cooling temperature range is -190 DEG C.
Step 5: material is taken out, deep cooling rolling is carried out 50% with reduction ratio ((H-h)/H).After rolling, rolled piece
Temperature < -50 DEG C.
Step 6: the band after rolling is carried out doubling along rolling direction and is overlapped, it is put into deep cooling box and cools down again, it is cold
But the time was at 5 minutes.
Step 7: cooling material is carried out deep cooling rolling again, reduction ratio maintains 50%.
The 6th step and the 7th step 8 times are repeated, high performance stratiform copper/Li metal composite foil is produced.
It is cooled down again step 8: the band after rolling is put into deep cooling box, cooling time was at 5 minutes.
Step 9: taking out again cooling stratiform copper/Li metal composite foil carries out deep cooling asymmetrical rolling, friction speed ratio is
1.3, rolling reduction ratio is 10%.
The 8th step and the 9th step are repeated, until rolled piece thickness is rolled 50 μm.The material is nano lamellar composite construction, tool
There are good battery attributes.After being rolled by this technique, Cu layers with a thickness of 50nm, lithium with a thickness of 100nm.
Application case 2:
30 μ m-thick stratiform copper/lithium composite foil deep cooling asymmetrical rolling preparation, steps are as follows:
Step 1: the thickness with a thickness of 50 μm, before copper rolling using pure lithium and fine copper metal foil as raw material, before lithium rolling
It is 25 μm.
Step 2: metal copper foil and metallic lithium foil shear rectangularity size, the width of copper foil is of same size with lithium foil,
But the length of copper foil is twice of lithium foil length.
Step 3: copper foil doubling along its length has been coated lithium foil completely.
It is cooled down step 4: the material coated is put into deep cooling box, it is 10 minutes cooling, realize that material temperature is equal
It is even cold.Deep cooling box is cooled down using nitrogen, and cooling temperature range is -150 DEG C.
Step 5: material is taken out, deep cooling rolling is carried out 50% with reduction ratio ((H-h)/H).After rolling, rolled piece
Temperature < -50 DEG C.
Step 6: the band after rolling is carried out doubling along rolling direction and is overlapped, it is put into deep cooling box and cools down again, it is cold
But the time was at 5 minutes.
Step 7: cooling material is carried out deep cooling rolling again, reduction ratio maintains 50%.
The 6th step and the 7th step 8 times are repeated, high performance stratiform copper/Li metal composite foil is produced.
It is cooled down again step 8: the band after rolling is put into deep cooling box, cooling time was at 5 minutes.
Step 9: taking out again cooling stratiform copper/Li metal composite foil carries out deep cooling asymmetrical rolling, friction speed ratio is
1.2, rolling reduction ratio is 10%.
The 8th step and the 9th step are repeated, until rolled piece thickness is rolled 25 μm.The material is nano lamellar composite construction, tool
There are good battery attributes.After being rolled by this technique, Cu layers with a thickness of 25nm, lithium with a thickness of 50nm.
Claims (2)
1. a kind of prepare stratiform copper/lithium composite foil deep cooling asynchronous rolling method, which comprises the steps of:
Step 1: using pure lithium and fine copper metal foil as raw material, the half with a thickness of lithium foil of copper foil, before the rolling of lithium foil
With a thickness of 20-100 μm, before copper foil rolling with a thickness of 10-50 μm；
Step 2: copper foil and lithium foil are sheared rectangularity；
Step 3: copper foil doubling has been coated lithium foil completely；
It is cooled down step 4: the material coated is put into deep cooling box, it is 10 minutes cooling, realize material temperature by uniformly cold
But, the deep cooling box is cooled down using nitrogen, and cooling temperature range is -190 DEG C~-100 DEG C；
Step 5: material is taken out, deep cooling rolling, after rolling, rolled piece temperature < -50 DEG C are carried out 50% with reduction ratio；
Step 6: the band after rolling is carried out doubling and is overlapped, it is put into deep cooling box and cools down again, 3-5 minutes cooling time；
Step 7: cooling material is carried out deep cooling rolling again, reduction ratio maintains 50%；
The 6th step and the 7th step 5-10 times are repeated, high performance stratiform copper/Li metal composite foil is produced；
It is cooled down again step 8: stratiform copper/Li metal composite foil is put into deep cooling box, 3-5 minutes cooling time；
Step 9: taking out again cooling stratiform copper/Li metal composite foil carries out deep cooling asymmetrical rolling, friction speed ratio is 1.0
~1.6, rolling reduction ratio is 5~20%；
The 8th step and the 9th step are repeated, until rolled piece thickness is rolled to 10~50 μm.
2. preparing stratiform copper/lithium composite foil deep cooling asynchronous rolling method according to claim 1, which is characterized in that institute
It states in second step, the width of copper foil is of same size with lithium foil, but length is twice of lithium foil length, will in the third step
Lithium foil is placed on copper foil, and a broadside of lithium foil is aligned with a broadside of copper foil, by the perpendicular bisector pair of copper foil along its length
Folding, has coated lithium foil completely.
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| CN105170652B (en) * | 2015-08-31 | 2017-03-01 | 东北大学 | A kind of preparation method of multi-layer heterogeneous metal composite strip in razor-thin |
| CN105772508B (en) * | 2015-12-27 | 2017-12-19 | 佛山市领卓科技有限公司 | A kind of method of copper foil deep processing |
| CN106670233B (en) * | 2016-12-20 | 2018-06-29 | 中南大学 | It is a kind of to prepare a nanometer deep cooling milling method for lithium Al bimetal composite foil |
| CN106607456B (en) * | 2016-12-20 | 2018-04-06 | 中南大学 | A kind of composite rolling preparation method of two-dimentional platinum series alloy material |
| CN107185963B (en) * | 2017-06-14 | 2018-12-04 | 中南大学 | A method of preparing high performance Ti 6Al4V sheet alloy |
| CN107931327A (en) * | 2017-10-12 | 2018-04-20 | 武汉钢铁有限公司 | A kind of manufacture method of pipe line steel and stainless steel hot-rolling composite plate and application |
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