CN108435791A - A kind of deep cooling asynchronous rolling method preparing stratiform copper/lithium composite foil - Google Patents
A kind of deep cooling asynchronous rolling method preparing stratiform copper/lithium composite foil Download PDFInfo
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- CN108435791A CN108435791A CN201810411569.5A CN201810411569A CN108435791A CN 108435791 A CN108435791 A CN 108435791A CN 201810411569 A CN201810411569 A CN 201810411569A CN 108435791 A CN108435791 A CN 108435791A
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- Prior art keywords
- foil
- copper
- lithium
- deep cooling
- rolling
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Classifications
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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
-
- 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
-
- 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
Abstract
A kind of deep cooling asynchronous rolling method preparing stratiform copper/lithium composite foil, 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, and intermetallic compound is formed to be difficult to.At the same time, in the case of using ultralow temperature, lithium metal all has good plasticity with metallic copper, 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 field, more particularly to a kind of depth preparing stratiform copper/lithium composite foil
Cold asynchronous rolling method.
Background technology
Currently, lithium metal obtains the great attention of academia of 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, to which pure lithium material part can be caused to occur
Oxidation, it is likely that lead to material combustion, and copper/lithium composite foil of stratiform cannot be prepared.
Invention content
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：
A kind of deep cooling asynchronous rolling method preparing stratiform copper/lithium composite foil, includes the following steps：
The first step：Using pure lithium and fine copper metal foil as raw material, the thickness of copper foil is the half of lithium foil；
Second step：Copper foil and lithium foil are sheared into rectangularity, the width of copper foil is identical as lithium foil, but one that length is lithium foil
Times；
Third walks：By copper foil doubling along its length, lithium foil has been coated completely；
4th step：Material is put into deep cooling box and is cooled down, it is 10 minutes cooling, realize that material temperature is uniformly cooled；
5th step：Material is taken out, deep cooling rolling, after rolling, rolled piece temperature are carried out 50% or so with reduction ratio
<-50℃；
6th step：Band after rolling doubling and overlap, is put into deep cooling box and cools down again, cooling time 3-5
Minute；
7th step：Cooling material is subjected to deep cooling rolling again, reduction ratio maintains 50% or so；
The 6th step and the 7th step 5-10 times are repeated, high performance stratiform copper/Li metal composite foil is produced；
8th step：Stratiform copper/Li metal composite foil is put into deep cooling box and is cooled down again, 3-5 minutes cooling time；
9th step：Using deep cooling asymmetrical rolling, friction speed ratio is 1.0~1.6, and roll reduction 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, the thickness before the rolling of lithium foil is 20-100 μm, and the thickness before copper foil rolling is 10-50 μm.
The deep cooling box is cooled down using nitrogen, and cooling temperature range is -190 DEG C~-100 DEG C.
The cardinal principle of the present invention is to be plastically deformed using ultralow temperature, and binding force is relatively between lithium metal and metallic copper
It is weak, to form intermetallic compound to be difficult to.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 ply 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.
Description of the drawings
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 foil；2. lithium foil；3. stacking copper/lithium composite foil；4. first stage deep cooling box, is cooled down 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 implementation mode
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 deep cooling asynchronous rolling method preparing stratiform copper/lithium composite foil, passes through multi-pass deep cooling
Accumulation rolling, rolled piece form copper/Li metal composite foil of layer structure, are as follows：
The first step：It is raw material with pure lithium foil 2 and copper foil 1, the thickness before lithium foil 2 rolls is 20-100 μm, and copper foil 1 rolls
Preceding thickness is 10-50 μm, and the thickness of copper foil 1 is the half of lithium foil 2.
Second step：Copper foil 1 and lithium foil 2 shear rectangularity, and the width of copper foil 1 is identical as lithium foil 2, still, the length of copper foil 1
Degree is one times of lithium foil 2.
Third walks：By the doubling along its length of copper foil 1, lithium foil 2 has been coated completely, obtains stacking copper/lithium composite foil 3.
4th step：Copper/lithium composite foil 3 will be stacked to be put into 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.
5th step：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, after rolling, rolled piece temperature 50% or so<- 50 DEG C, the copper/lithium rolled is compound
Foil 6.
6th step：The copper of rolling/lithium composite foil 6 is subjected to doubling along rolling direction and is overlapped, first stage depth is put into
It is cooled down again in ice chest 4, cooling time was at 3-5 minutes.
7th step：Cooling material is subjected to deep cooling rolling again, reduction ratio maintains 50% or so.
The 6th step and the 7th step 5-10 times are repeated, at the high performance stratiform copper/Li metal composite foil 10 of output.
8th step：Stratiform copper/Li metal composite foil 10 is put into second stage deep cooling box 0 and is cooled down again, it is cooling
Time was at 5 minutes.
9th step：It taking out stratiform copper/Li metal composite foil 10 and carries out deep cooling asymmetrical rolling, friction speed ratio is 1.0~
1.6, roll reduction 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 ensure 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 present invention below.
Application case 1
Prepared by 50 μ m-thick stratiform copper/lithium composite foil deep cooling asymmetrical rolling, steps are as follows：
The first step：Using pure lithium and fine copper metal foil as raw material, the thickness before lithium rolling is 100 μm, the thickness before copper rolling
Degree is 50 μm.
Second step：Metal copper foil and metallic lithium foil shear rectangularity size, and the width of copper foil is identical as lithium foil, still,
The length of copper foil is one times of lithium foil.
Third walks：By copper foil doubling along its length, lithium foil has been coated completely.
4th step：Material is put into deep cooling box and is cooled down, it is 10 minutes cooling, realize material temperature by uniformly cold.It is deep
Ice chest is cooled down using nitrogen, and cooling temperature range is -190 DEG C.
5th step：Material is taken out, deep cooling rolling is carried out 50% or so with reduction ratio ((H-h)/H).After rolling,
Rolled piece temperature<-50℃.
6th step：Band after rolling is subjected to doubling along rolling direction and is overlapped, is put into deep cooling box and cools down again, it is cold
But the time was at 5 minutes.
7th step：Cooling material is subjected to deep cooling rolling again, reduction ratio maintains 50% or so.
The 6th step and the 7th step 8 times are repeated, at the high performance stratiform copper/Li metal composite foil of output.
8th step：Band after rolling is put into deep cooling box and is cooled down again, cooling time was at 5 minutes.
9th step：Using deep cooling asymmetrical rolling, friction speed ratio is 1.3, roll reduction 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 of thickness is 50nm, and the thickness of lithium is 100nm.
Application case 2：
Prepared by 30 μ m-thick stratiform copper/lithium composite foil deep cooling asymmetrical rolling, steps are as follows：
The first step：Using pure lithium and fine copper metal foil as raw material, the thickness before lithium rolling is 50 μm, the thickness before copper rolling
It is 25 μm.
Second step：Metal copper foil and metallic lithium foil shear rectangularity size, and the width of copper foil is identical as lithium foil, still,
The length of copper foil is one times of lithium foil.
Third walks：By copper foil doubling along its length, lithium foil has been coated completely.
4th step：Material is put into deep cooling box and is cooled down, it is 10 minutes cooling, realize material temperature by uniformly cold.It is deep
Ice chest is cooled down using nitrogen, and cooling temperature range is -150 DEG C.
5th step：Material is taken out, deep cooling rolling is carried out 50% or so with reduction ratio ((H-h)/H).After rolling,
Rolled piece temperature<-50℃.
6th step：Band after rolling is subjected to doubling along rolling direction and is overlapped, is put into deep cooling box and cools down again, it is cold
But the time was at 5 minutes.
7th step：Cooling material is subjected to deep cooling rolling again, reduction ratio maintains 50% or so.
The 6th step and the 7th step 8 times are repeated, at the high performance stratiform copper/Li metal composite foil of output.
8th step：Band after rolling is put into deep cooling box and is cooled down again, cooling time was at 5 minutes.
9th step：Using deep cooling asymmetrical rolling, friction speed ratio is 1.2, roll reduction 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 of thickness is 25nm, and the thickness of lithium is 50nm.
Claims (4)
1. a kind of deep cooling asynchronous rolling method preparing stratiform copper/lithium composite foil, which is characterized in that include the following steps：
The first step：Using pure lithium and fine copper metal foil as raw material, the thickness of copper foil is the half of lithium foil；
Second step：Copper foil and lithium foil are sheared into rectangularity；
Third walks：By copper foil doubling, lithium foil has been coated completely；
4th step：Material is put into deep cooling box and is cooled down, it is 10 minutes cooling, realize that material temperature is uniformly cooled；
5th step：Material is taken out, deep cooling rolling, after rolling, rolled piece temperature are carried out 50% or so with reduction ratio<-50
℃；
6th step：Band after rolling is subjected to doubling and is overlapped, is put into deep cooling box and cools down again, 3-5 minutes cooling time；
7th step：Cooling material is subjected to deep cooling rolling again, reduction ratio maintains 50% or so；
The 6th step and the 7th step 5-10 times are repeated, high performance stratiform copper/Li metal composite foil is produced；
8th step：Stratiform copper/Li metal composite foil is put into deep cooling box and is cooled down again, 3-5 minutes cooling time；
9th step：Using deep cooling asymmetrical rolling, friction speed ratio is 1.0~1.6, and roll reduction is 5~20%；
The 8th step and the 9th step are repeated, until rolled piece thickness is rolled to 10~50 μm.
2. preparing the deep cooling asynchronous rolling method of stratiform copper/lithium composite foil according to claim 1, which is characterized in that institute
It states in the first step, the thickness before the rolling of lithium foil is 20-100 μm, and the thickness before copper foil rolling is 10-50 μm.
3. preparing the deep cooling asynchronous rolling method of stratiform copper/lithium composite foil according to claim 1, which is characterized in that institute
It states deep cooling box to be cooled down using nitrogen, cooling temperature range is -190 DEG C~-100 DEG C.
4. preparing the deep cooling asynchronous rolling method of stratiform copper/lithium composite foil according to claim 1, which is characterized in that institute
It states in second step, the width of copper foil is identical as lithium foil, but one times that length is lithium foil, and in the third step, lithium foil is placed on copper
On foil, a broadside of lithium foil is aligned with a broadside of copper foil, and the perpendicular bisector doubling of copper foil along its length coats completely
Good lithium foil.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109092897A (en) * | 2018-08-29 | 2018-12-28 | 中南大学 | A kind of Impulsive Current auxiliary deep cooling reducing asymmetrical rolling apparatus and method preparing ultrafine grain metal band |
| CN109108070A (en) * | 2018-08-29 | 2019-01-01 | 中南大学 | A kind of Impulsive Current auxiliary deep cooling rolling device and method preparing ultrafine grain metal band |
| CN109174968A (en) * | 2018-08-29 | 2019-01-11 | 中南大学 | A kind of Impulsive Current auxiliary deep cooling friction speed asymmetrical rolling apparatus and method preparing ultrafine grain metal band |
| CN109201735A (en) * | 2018-11-15 | 2019-01-15 | 中南大学 | A kind of High-strength pure copper foil material deep cooling rolling preparation method |
| CN109201740A (en) * | 2018-11-15 | 2019-01-15 | 中南大学 | A kind of multistage deep cooling milling method preparing high density twin medium entropy alloy |
| CN109746270A (en) * | 2019-01-14 | 2019-05-14 | 中南大学 | A kind of reversible deep cooling pack rolling method for separating and preparing of the single chassis of high-performance copper foil |
| CN109746271A (en) * | 2019-01-14 | 2019-05-14 | 中南大学 | A kind of deep cooling pack rolling preparation method of high-performance copper foil |
| CN110396633A (en) * | 2019-05-20 | 2019-11-01 | 东北大学 | A kind of preparation method of the bimodal tissue medium entropy alloy of Ultra-fine Grained |
| CN112058911A (en) * | 2020-08-06 | 2020-12-11 | 北京科技大学 | Asynchronous rolling system and method for overcoming buckling deformation of rolled plate |
| CN112517636A (en) * | 2020-11-24 | 2021-03-19 | 福州大学 | Deep low-temperature processing forming method for industrial pure titanium plate |
| CN112647033A (en) * | 2020-10-27 | 2021-04-13 | 北京市第五建筑工程集团有限公司 | Processing method of pure copper |
| CN113477707A (en) * | 2021-07-15 | 2021-10-08 | 太原理工大学 | Asynchronous micro-flexible rolling method for laminated metal composite thin strip |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109092897A (en) * | 2018-08-29 | 2018-12-28 | 中南大学 | A kind of Impulsive Current auxiliary deep cooling reducing asymmetrical rolling apparatus and method preparing ultrafine grain metal band |
| CN109108070A (en) * | 2018-08-29 | 2019-01-01 | 中南大学 | A kind of Impulsive Current auxiliary deep cooling rolling device and method preparing ultrafine grain metal band |
| CN109174968A (en) * | 2018-08-29 | 2019-01-11 | 中南大学 | A kind of Impulsive Current auxiliary deep cooling friction speed asymmetrical rolling apparatus and method preparing ultrafine grain metal band |
| CN109201735A (en) * | 2018-11-15 | 2019-01-15 | 中南大学 | A kind of High-strength pure copper foil material deep cooling rolling preparation method |
| CN109201740A (en) * | 2018-11-15 | 2019-01-15 | 中南大学 | A kind of multistage deep cooling milling method preparing high density twin medium entropy alloy |
| CN109746271A (en) * | 2019-01-14 | 2019-05-14 | 中南大学 | A kind of deep cooling pack rolling preparation method of high-performance copper foil |
| CN109746270A (en) * | 2019-01-14 | 2019-05-14 | 中南大学 | A kind of reversible deep cooling pack rolling method for separating and preparing of the single chassis of high-performance copper foil |
| CN110396633A (en) * | 2019-05-20 | 2019-11-01 | 东北大学 | A kind of preparation method of the bimodal tissue medium entropy alloy of Ultra-fine Grained |
| CN112058911A (en) * | 2020-08-06 | 2020-12-11 | 北京科技大学 | Asynchronous rolling system and method for overcoming buckling deformation of rolled plate |
| CN112647033A (en) * | 2020-10-27 | 2021-04-13 | 北京市第五建筑工程集团有限公司 | Processing method of pure copper |
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| CN112517636A (en) * | 2020-11-24 | 2021-03-19 | 福州大学 | Deep low-temperature processing forming method for industrial pure titanium plate |
| CN113477707A (en) * | 2021-07-15 | 2021-10-08 | 太原理工大学 | Asynchronous micro-flexible rolling method for laminated metal composite thin strip |
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