CN111850270A - Processing method for improving peeling strength of copper-aluminum composite board - Google Patents
Processing method for improving peeling strength of copper-aluminum composite board Download PDFInfo
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- CN111850270A CN111850270A CN202010698894.1A CN202010698894A CN111850270A CN 111850270 A CN111850270 A CN 111850270A CN 202010698894 A CN202010698894 A CN 202010698894A CN 111850270 A CN111850270 A CN 111850270A
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- copper
- aluminum composite
- composite board
- rolling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
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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
- B21B1/46—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 metal immediately subsequent to continuous casting
- B21B1/463—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 metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/56—Elongation control
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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
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/10—Compression, e.g. longitudinal compression
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Metal Rolling (AREA)
Abstract
The invention provides a processing method for improving the peeling strength of a copper-aluminum composite plate, which comprises the following steps: step one, introducing the cast-rolled and compounded copper-aluminum composite plate into a cold rolling mill for multi-pass rolling; and step two, immediately annealing the copper-aluminum composite board treated in the step one, wherein the annealing temperature is 280-320 ℃, and the annealing time is 2-5 h. The invention solves the problem that the copper-aluminum composite board cannot be used due to lower bonding strength when the interface layer is thicker. The processing method can greatly improve the peeling strength of the copper-aluminum composite board to meet the use requirement, has low requirement on equipment by the process, does not need to transform the equipment, and has the outstanding advantages of strong continuity in the production process, high interface bonding strength, stable performance and the like.
Description
Technical Field
The invention belongs to the technical field of metal plate strip metal production, and particularly relates to a processing method for improving the peeling strength of a copper-aluminum composite plate.
Background
Copper and aluminum have excellent electric conductivity and heat conductivity, and are widely applied to the fields of power transmission, electronic communication, transportation, new energy and the like. Compared with copper, aluminum has the advantages of light weight, corrosion resistance, low price and the like, the research on copper-aluminum composite materials is developed, aluminum is used for saving copper and replacing copper with aluminum, the import of high-price copper resources is reduced, and the method has very important significance for strategic structure adjustment of colored resources in China.
When the copper-aluminum laminated composite material is prepared by adopting a cast-rolling composite method, due to the complex production process, a plurality of influencing factors and mutual constraint, particularly when a large-thickness composite board is prepared, the composite board with a thicker copper-aluminum interface layer is easily prepared, the thickness of the composite board is more than 8 mu m, the types of intermediate compounds are more than three, the bonding strength is lower, and the composite board cannot be used. For the plate, the common method is to continue cold rolling processing, but the phenomenon of plate delamination cracking and scrapping exists, or the plate is directly recycled, so that the production cost is increased.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a processing method for improving the peeling strength of a copper-aluminum composite plate.
The technical scheme adopted by the invention for solving the technical problems is as follows: a processing method for improving the peeling strength of a copper-aluminum composite plate comprises the following steps:
step one, introducing the copper-aluminum composite plate with thicker interface layer and lower bonding strength after casting-rolling compounding into a cold rolling mill for multi-pass rolling;
and step two, immediately annealing the copper-aluminum composite board treated in the step one, wherein the annealing temperature is 280-320 ℃, and the annealing time is 2-5 hours.
Further, the rolling process in the step one comprises the following specific steps: firstly, carrying out multi-pass small-processing-quantity rolling, wherein the processing quantity is 6-8%, the processing quantity of the last rolling is increased, and the processing quantity is 10-15%.
Furthermore, in the step one, the rolling pass is 4-6 times.
Furthermore, protective gas is required to be introduced in the annealing treatment process in the second step.
Further, the protective gas is nitrogen.
The beneficial effects of the invention are mainly shown in the following aspects: aiming at the condition that an interface layer of a cast-rolled composite prepared copper-aluminum composite plate is thick and the bonding strength is low, the processing process is divided into two steps of cold rolling and annealing, wherein the cold rolling adopts multi-pass rolling, the number of rolling passes is generally 4-6, and the multi-pass rolling with small processing amount is firstly carried out, and the processing amount is 6-8% so as to prevent the interface layer of the composite plate from cracking in the rolling process; the final rolling processing amount is increased and is 10-15%; annealing treatment is carried out immediately after rolling, a resistance wire heating method can be adopted, the annealing temperature is 280-320 ℃, the annealing time is 2-5 hours according to the size of a product, and protective gas is introduced in the annealing process to prevent a copper layer from being oxidized; the peeling strength of the copper-aluminum laminated composite material prepared by the method can reach 25N/mm, the peeling strength of the copper-aluminum composite plate can be greatly improved by adopting the processing method disclosed by the invention, so that the copper-aluminum laminated composite material meets the use requirement, the processing technology has low requirement on equipment, the equipment does not need to be modified, and the copper-aluminum laminated composite material has the outstanding advantages of strong continuity in the production process, high interface bonding strength, stable performance and the like.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The present invention is described in detail with reference to the following examples, which are provided for the purpose of explaining the technical solutions of the present invention and describing the detailed embodiments and the specific operation procedures, but the scope of the present invention is not limited to the following examples.
Examples
A processing method for improving the peeling strength of a copper-aluminum composite plate comprises the following steps:
step one, introducing the copper-aluminum composite plate with thicker interface layer and lower bonding strength after casting-rolling compounding into a cold rolling mill for multi-pass rolling;
and step two, immediately annealing the copper-aluminum composite board treated in the step one, wherein the annealing temperature is 280-320 ℃, and the annealing time is 2-5 hours.
Further, the rolling process in the step one comprises the following specific steps: firstly, carrying out multi-pass small-processing-quantity rolling, wherein the processing quantity is 6-8%, the processing quantity of the last rolling is increased, and the processing quantity is 10-15%.
Furthermore, in the step one, the rolling pass is 4-6 times.
Furthermore, protective gas is required to be introduced in the annealing treatment process in the second step.
Further, the protective gas is nitrogen.
The processing method is suitable for cast-rolling composite preparation production, and the condition of low bonding strength caused by excessively thick interface layer.
Example 1
For further explanation of the invention, reference is made to the accompanying drawing 1: the copper-aluminum composite plate with the thicker interface layer after cast-rolling compounding is selected, the peeling strength is less than or equal to 8N/mm, the processing process comprises two steps of cold rolling and annealing, and the method specifically comprises the following steps of: the copper-aluminum composite board is introduced into a cold rolling mill, multi-pass small-processing-amount rolling is firstly carried out, the processing amount is 6-8%, the processing amount of the last rolling is increased, the processing amount is 10-15%, intermediate annealing is not needed, annealing treatment is immediately carried out after rolling, the annealing temperature is kept at 280-320 ℃, the annealing time is 3-5 hours, and the annealed composite board is naturally cooled in the air. The peel strength of the copper-aluminum laminated composite material prepared by the method can reach 25N/mm.
Aiming at the conditions that the copper-aluminum composite plate is thick in interface layer, low in bonding strength and incapable of being used, the copper-aluminum composite plate with high peel strength is obtained by rolling with large processing amount after multi-pass rolling with small processing amount and low-temperature annealing, so that the copper-aluminum composite plate meets the use requirement. The processing method can greatly improve the peeling strength of the copper-aluminum composite board to meet the use requirement, has low requirement on equipment by the processing technology, does not need to transform the equipment, and has the outstanding advantages of strong continuity in the production process, high interface bonding strength, stable performance and the like.
The technical solutions and embodiments of the present invention are not limited, and the same solutions or effects as those of the technical solutions and embodiments of the present invention are within the scope of the present invention. It is further noted that relational terms may be used herein to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (5)
1. A processing method for improving the peeling strength of a copper-aluminum composite board is characterized by comprising the following steps: the method comprises the following steps:
Step one, introducing the copper-aluminum composite plate with thicker interface layer and lower bonding strength after casting-rolling compounding into a cold rolling mill for multi-pass rolling;
and step two, immediately annealing the copper-aluminum composite board treated in the step one, wherein the annealing temperature is 280-320 ℃, and the annealing time is 2-5 hours.
2. The processing method for improving the peeling strength of the copper-aluminum composite board according to claim 1, characterized in that: the rolling process in the first step comprises the following steps: firstly, carrying out multi-pass small-processing-quantity rolling, wherein the processing quantity is 6-8%, the processing quantity of the last rolling is increased, and the processing quantity is 10-15%.
3. The processing method for improving the peeling strength of the copper-aluminum composite board as claimed in claim 2, wherein the processing method comprises the following steps: in the step one, rolling passes are 4-6 times.
4. The processing method for improving the peeling strength of the copper-aluminum composite board according to claim 1, characterized in that: and in the second step, protective gas is required to be introduced in the annealing treatment process.
5. The processing method for improving the peeling strength of the copper-aluminum composite board according to claim 4, characterized in that: the protective gas is nitrogen.
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| CN202010698894.1A CN111850270B (en) | 2020-07-20 | 2020-07-20 | Processing method for improving peeling strength of copper-aluminum composite board |
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| CN202010698894.1A CN111850270B (en) | 2020-07-20 | 2020-07-20 | Processing method for improving peeling strength of copper-aluminum composite board |
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| CN111850270B CN111850270B (en) | 2022-03-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117840219A (en) * | 2024-03-07 | 2024-04-09 | 洛阳铜一金属材料发展有限公司 | Copper-aluminum composite foil and preparation method thereof |
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| US20100291402A1 (en) * | 2006-10-26 | 2010-11-18 | Takemi Muroga | Rolled copper foil and manufacturing method thereof |
| CN103060624A (en) * | 2013-01-14 | 2013-04-24 | 洛阳铜一金属材料发展有限公司 | Aluminum substrate material of copper-aluminum composite plate strip, copper-aluminum composite plate strip and processing method of copper-aluminum composite plate strip |
| CN106040773A (en) * | 2016-07-28 | 2016-10-26 | 汉舟四川铜铝复合科技有限公司 | Preparing method for copper and aluminum composite material |
| CN108425081A (en) * | 2018-03-29 | 2018-08-21 | 河南科技大学 | A kind of copper aluminium rolling casting bonding strip online annealing method |
| CN108515085A (en) * | 2018-03-30 | 2018-09-11 | 湖南科罗德新材料有限公司 | The preparation method of Copper-Aluminum compound strip |
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2020
- 2020-07-20 CN CN202010698894.1A patent/CN111850270B/en active Active
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| US20100291402A1 (en) * | 2006-10-26 | 2010-11-18 | Takemi Muroga | Rolled copper foil and manufacturing method thereof |
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| CN117840219A (en) * | 2024-03-07 | 2024-04-09 | 洛阳铜一金属材料发展有限公司 | Copper-aluminum composite foil and preparation method thereof |
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| CN111850270B (en) | 2022-03-15 |
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Effective date of registration: 20230619 Address after: 471123 No. 75, Huifeng Road, Huimeng Town, Mengjin District, Luoyang, Henan Province Patentee after: LUOYANG TONGYI METAL MATERIAL DEVELOPMENT CO.,LTD. Address before: 471000 No. 48, Xiyuan Road, Jianxi District, Henan, Luoyang Patentee before: HENAN University OF SCIENCE AND TECHNOLOGY |