CN202764278U - Cold rolling type copper-aluminum composite plate strip - Google Patents
Cold rolling type copper-aluminum composite plate strip Download PDFInfo
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- CN202764278U CN202764278U CN 201220162785 CN201220162785U CN202764278U CN 202764278 U CN202764278 U CN 202764278U CN 201220162785 CN201220162785 CN 201220162785 CN 201220162785 U CN201220162785 U CN 201220162785U CN 202764278 U CN202764278 U CN 202764278U
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Abstract
The utility model discloses a cold rolling type copper-aluminum composite plate strip. The cold rolling type copper-aluminum composite plate strip comprises an aluminum plate layer and a copper plate layer which are compounded together by a cold rolling mode; before pre-rolling, the ratio of the thickness of an aluminum plate to the thickness of a copper plate is larger than or equal to 10; and after rolling, the thickness ratio of the aluminum plate layer to the copper plate layer is greater than or equal to 10. According to the cold rolling type copper-aluminum composite plate strip disclosed by the utility model, by selecting the aluminum plate and the copper plate with proper thickness ratio, the thickness ratio of the copper plate to the aluminum plate is basically unchanged before and after the copper plate and the aluminum plate are rolled and further the flatness of the copper-aluminum composite plate strip as a finished product can be ensured, the copper plate and the aluminum plate are subjected to full diffusion and chemical reactions on the composite surface in the manufacturing process, the composite surface obtains a transitional structure with an excellent performance, and the bonding strength of the finished product is effectively improved.
Description
Technical field
The utility model belongs to the composite metal plate technical field, is specifically related to a kind of cold rolling formula copper-aluminum composite board band.
Background technology
The copper-aluminum composite board band is the composite that coats layer of copper on the surface of aluminium sheet., demand king-sized copper belt wide especially with copper-aluminum composite board band replacement application surface have a wide range of applications at electric power and field of signal transmissions, are expected to form huge industry.
In the world main copper resource distribution North America, Latin America and in non-, and China's copper resource is comparatively deficient.Along with China's copper output continue increase substantially, particularly smelt the continuous expansion of ability, it is more and more nervous that raw material supply has seemed, the contradiction of rapid growth and shortage of resources.So for China, the development that development copper aluminium lamination shape composite plate replaces copper extremely to tally with the national condition with the cheap aluminium of part.
The proportion of copper is 8.96 g/ccs, is 3.65 times of aluminium (2.7 g/ccs), and the aluminium product number that also just means same weight is 3.65 times of copper material product number, is applied to the fields such as electric power with aluminium substitution copper and will calculates a lot.Because the advantages such as copper has good conduction, thermal conductivity, easily soldering, contact resistance is low, wear-resisting and specious.And on physical property, the oxide of copper still has conductive capability, does not still affect Electrical Safety after copper cable is aging.And the very easily oxidation of aluminium surface, formed oxide-film is very firm, and heat conduction and electric conductivity are very poor, so be difficult to replace completely copper with aluminium in some application.With part aluminium substitution copper, the copper that obtains through certain technique/Al bimetal composite plate can comprehensively have the premium properties of copper/aluminium, has not only possessed the good conduction of copper, thermal conductivity and stronger decay resistance but also has had aluminium light weight, economic dispatch advantage.
The research field of preparation copper/Al bimetal laminated composite plate is very wide at present, and production method has multiple.General conventional preparation bimetallic material sorting technique is divided according to the process attribute of recombination process, is respectively casting composite algorithm, blast composite algorithm, welding composite algorithm, roll-bonding method etc.
Founding is compound to be to adopt the method for casting to make the different successively founding of liquid metal of two kinds of fusing points together or a kind of liquid metal is cast together with another kind of solid metallic is solidifying.Early stage founding is compound to be carried out under nearly equilibrium freezing condition, usually cause interface element too to spread, harmful undue dissolving that generates mutually even occur solid, cause the poor quality, modern liquid-solid phase complex technique is take the quick nonequilibrium freezing of liquid metal and partly solidifies the direct plastic forming of attitude as feature, therefore can overcome some compound disadvantages of founding.The high combination process efficient of the quality of founding compound material is high, but because copper and at high temperature very easily oxidation of aluminium, the oxide-film of generation will affect the bond strength of composite greatly, use protective atmosphere complex process cost high.
The blast composite algorithm is the energy that utilizes explosive charge to produce, and at Microsecond grade two metallic plates are produced up to the strain rate of 106～107/s and the high pressure of 104MPa at the point of impingement, thereby the welding that realizes dissimilar metal is compound.Explosive composite material has very high processing characteristics, can stand follow-up multiple hot and cold processing repeatedly.Explosive composite material has good serviceability.Adopt at present the blast composite algorithm can realize the compound of 300 various metals.But blast combined techniques mechanization degree is low, and production efficiency is lower, and working condition is poor, and has certain danger, and the bimetallic material distortion of preparation is large, out-of-flatness.
The welding composite algorithm mainly comprises melting welding, soldering, friction stir welding and diffusion welding (DW) etc.Fusion welding method is unsuitable for the welding of aluminium/copper, because there are larger difference in aluminium and copper aspect physical property and chemical property, causes its melting welding weldability very poor, is embodied in joint fragility and greatly, easily cracks with strength of joint low.Therefore, less employing fusion welding method comes the foreign material of welding of aluminum/copper and so in the general industry production.Method for welding can successfully be realized the welding of aluminium/copper, but will reduce the strict definite solder composition of impact needs and the soldering processes of the factor butt joint performances such as intermetallic compound formation.Aluminium/copper friction stir welding is a kind of environment-friendly type new welding technology that output is high, production cost is low of welding, in the welding of the materials such as aluminium, magnesium, copper, obtained rapid application. thereby have the people also to begin to explore in this way the foreign materials such as welding pot/copper, at present friction stir welding research just begins, and some hot issue needs further further investigation.
To be metallic plate be applied thereto under the effect of crunch being subject to milling train the basic principle of roll-bonding method, double layer of metal treat composite surface generation plastic deformation, surface metal-layer is broken.Subsequently, clean and metal level activation exposes from the metal surface of breaking, under the crunch effect, form plane metallurgical binding.Faying face continues to enlarge in follow-up heat treatment process, forms firm combination.The rolling compound hot rolling and cold rolling compound that is divided into again.
Hot rolling compounding method is to be rolled distortion under HTHP by compound metal stock, is heated and power time effect and make different metal carry out a kind of process of seam.This method was in use to so far from the thirties always, was still a kind of important complex method.Hot rolling is compound to be to utilize the comparatively stable thermal diffusion of formation under the high temperature hot activation condition, waste heat after rolling will make the atom diffusion more abundant, thereby form good compound, but hot rolling is compounded in and exists some difficulties (copper heat-tinting temperature is lower than 180 ℃) on the process implementing, is difficult to control for the formation of some intermetallic frangible compounds.
Cold rolling compound be to grow up on the compound basis of hot rolling.The cold rolling compound pressure welding that belongs to, the welding process that the general reference metal carries out below recrystallization temperature.Say in principle, all have the metal of enough ductility can be by cold rolling acquisition composite wood.Production low-intensity, high-ductility, easily oxidation, small dimension and small lot, high-precision composite plate, it is feasible adopting cold-rolling practice.In recent years, in order to reach cold rolling purpose, adopt the asynchronous rolling machine rolling composite plate to obtain success.First the surface of sheet metal is cleared up before compound cold rolling, by being rolled the contact surface relative shear distortion of sheet material, produced compoundly greater than a certain critical deformation, after diffusion annealing is processed, obtain desirable composite interface structures.The cold rolling combination that can realize multiple constituent element, and can produce coiled composite, size is accurate, efficient is high, therefore cold rolling compound be one of most widely used layered metal complex technique in the world today.Cold rolling recombination process applies to produce large-scale forming laminated sheet material and thin material widely.Compare with other production method, cold rolling have simple to operate, easy advantages such as automation.Material can not with traditional melting method in conjunction with the time, can adopt cold rolling complex method.He also be the sheeting combination and the time a kind of reliable method.But owing to do not spread fully and chemical reaction in the rolling recombination process, so the to a great extent fully realization of the transition structure of compound interface, still there is shortcoming in bond strength.
The utility model content
The purpose of this utility model provides preferably cold rolling formula copper-aluminum composite board band of a kind of bond strength.
The technical scheme that realizes the utility model purpose is: a kind of cold rolling formula copper-aluminum composite board band, comprise the aluminum layer and the copper coin layer that are combined with each other by cold rolling mode, it is characterized in that: the ratio that rolls in advance front described aluminium plate thickness and copper plate thickness is more than or equal to 10, and the Thickness Ratio of rolling rear aluminum layer and copper coin layer is more than or equal to 10.
In the such scheme, the composite surface that rolls in advance front copper coin and aluminium sheet adjacency is provided with wire or the netted indenture of polishing through the stainless steel wire brush.
In the such scheme, the thickness of copper coin layer is 0.8 to 1.2 millimeter, and the thickness of aluminum layer is 8 to 12 millimeters.
By sampling detects to finished product copper aluminum composite belt plate, its analysis result is as follows: there is a critical point in the ratio of (1) aluminium plate thickness and copper plate thickness, 10 with regard to sample, when greater than this value, along with the increase of the ratio of aluminium plate thickness and copper plate thickness, the bond strength of finished product copper-aluminum composite board band increases.When less than this value, the bond strength of finished product copper-aluminum composite board band reduces with the increase of bed thickness ratio.In addition, the ratio of aluminium plate thickness and copper plate thickness rolls more greatly rear copper aluminium lamination thickness rate closer to the copper aluminium lamination thickness rate before rolling, and is conducive to obtain straight composite plate when namely the ratio of aluminium plate thickness and copper plate thickness is large.(2) the utility model method is compared with the cold rolling mode of tradition, can obtain to have the more copper aluminum composite belt plate of high bond strength, its bond strength even can reach 3 times of traditional cold rolling composite band plate.
The utlity model has positive effect: (1) the utility model is by selecting aluminium sheet and the copper coin of Rational Thickness ratio, make it substantially constant at rolling front and back copper aluminium Thickness Ratio, can either guarantee the glacing flatness of finished product copper-aluminum composite board band, again can be in manufacture process so that copper coin and aluminium sheet spread fully and chemical reaction at composite surface, thereby obtain to have the transition structure of excellent performance at composite surface, Effective Raise the bond strength of finished product.
Description of drawings
Fig. 1 is a kind of structural representation of the present utility model;
Fig. 2 is a kind of structural representation of copper-aluminum composite board band shown in Figure 1 before cold rolling;
Fig. 3 is the another kind of structural representation of copper-aluminum composite board band shown in Figure 1 before cold rolling.
The specific embodiment
(embodiment 1)
Fig. 1 and Fig. 2 have shown the first specific embodiment of the present utility model, and wherein Fig. 1 is a kind of structural representation of the present utility model; Fig. 2 is a kind of structural representation of copper-aluminum composite board band shown in Figure 1 before cold rolling.
The present embodiment is a kind of cold rolling formula copper-aluminum composite board band, see illustrated in figures 1 and 2, comprise the aluminum layer 1 and the copper coin layer 2 that are combined with each other by cold rolling mode, it is characterized in that: the ratio that rolls in advance front described aluminium sheet 3 thickness and copper coin 4 thickness is more than or equal to 10, and the Thickness Ratio of rolling rear aluminum layer 1 and copper coin layer 2 is more than or equal to 10.
The composite surface that rolls in advance front copper coin 3 and aluminium sheet 4 adjacency is provided with the wire indenture 5 of polishing through the stainless steel wire brush.
Preferred 0.8 to 1.2 millimeter of the thickness of copper coin layer 2, preferred 8 to 12 millimeters of the thickness of aluminum layer 1.
The present embodiment is by selecting aluminium sheet and the copper coin of Rational Thickness ratio, make it substantially constant at rolling front and back copper aluminium Thickness Ratio, can either guarantee the glacing flatness of finished product copper-aluminum composite board band, again can be in manufacture process so that copper coin and aluminium sheet spread fully and chemical reaction at composite surface, thereby obtain to have the transition structure of excellent performance at composite surface, Effective Raise the bond strength of finished product.
(embodiment 2)
Fig. 3 is the another kind of structural representation of copper-aluminum composite board band shown in Figure 1 before cold rolling, has shown another kind of structural representation of the present utility model.
The present embodiment is substantially the same manner as Example 1, and difference is: the composite surface of described aluminium sheet 3 and copper coin 4 adjacency is provided with the netted indenture 5 through the polishing of stainless steel wire brush.This netted indenture 5 is along forming along the polishing of different directions secondary with wheeled wire brush.
Among embodiment 1 and the embodiment 2, wire or the netted indenture of polishing through the stainless steel wire brush is set by the composite surface in aluminium sheet 3 and copper coin 4 adjacency, make the top layer distortion of lattice for the treatment of rolling aluminium sheet and copper coin, surface energy rises, thereby so that the atom on the Cu and Al combination face is easy to overcome dissimilar metal in conjunction with needed energy barrier, form good combination, thus the Effective Raise bond strength; By increasing the roughness of faying face, be conducive to improve the confficient of static friction between the composite surface simultaneously; In addition, increase heat and shear stress that mechanical friction produces, tear when being conducive to metal plastic deformation and pulverize oxide-film, the contact that keeps clean metal, active to improve contact surface.
Obviously, above-described embodiment of the present utility model only is for the utility model example clearly is described, and is not to be restriction to embodiment of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all embodiments exhaustive.And these belong to apparent variation or the change that connotation of the present utility model extends out and still belong to protection domain of the present utility model.
Claims (3)
1. cold rolling formula copper-aluminum composite board band, comprise the aluminum layer (1) and the copper coin layer (2) that are combined with each other by cold rolling mode, it is characterized in that: the ratio that rolls in advance front aluminium sheet (3) thickness and copper coin (4) thickness is more than or equal to 10, and the Thickness Ratio of rolling rear aluminum layer (1) and copper coin layer (2) is more than or equal to 10.
2. cold rolling formula copper-aluminum composite board band according to claim 1 is characterized in that: the composite surface that rolls in advance front copper coin (3) and aluminium sheet (4) adjacency is provided with wire or the netted indenture (5) through the polishing of stainless steel wire brush.
3. cold rolling formula copper-aluminum composite board band according to claim 1, it is characterized in that: the thickness of copper coin layer (2) is 0.8 to 1.2 millimeter, the thickness of aluminum layer (1) is 8 to 12 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220162785 CN202764278U (en) | 2012-04-17 | 2012-04-17 | Cold rolling type copper-aluminum composite plate strip |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220162785 CN202764278U (en) | 2012-04-17 | 2012-04-17 | Cold rolling type copper-aluminum composite plate strip |
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| CN202764278U true CN202764278U (en) | 2013-03-06 |
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| CN 201220162785 Expired - Lifetime CN202764278U (en) | 2012-04-17 | 2012-04-17 | Cold rolling type copper-aluminum composite plate strip |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103394510A (en) * | 2013-07-31 | 2013-11-20 | 山东莱芜金石集团有限公司 | Cold-rolled copper and aluminum composite material production process |
| CN103599932A (en) * | 2013-11-20 | 2014-02-26 | 银邦金属复合材料股份有限公司 | Rolling compositing process of aluminum-clad steel pipe material |
| CN105618479A (en) * | 2016-03-28 | 2016-06-01 | 太原科技大学 | Method utilizing herringbone ripple roller to roll composite plate strip |
| CN106086730A (en) * | 2016-07-28 | 2016-11-09 | 汉舟四川铜铝复合科技有限公司 | A kind of Technology for Heating Processing of copper aluminum composite material |
| CN107552564A (en) * | 2017-08-04 | 2018-01-09 | 无锡银荣板业有限公司 | The hot-rolled production process of copper-aluminum composite board |
| CN109174966A (en) * | 2018-08-24 | 2019-01-11 | 湖南科技大学 | Al/Cu/Mg composite board rolls preparation method |
| CN113290049A (en) * | 2021-05-15 | 2021-08-24 | 铜陵学院 | Preparation method of room-temperature rolling multi-layer layered copper-aluminum composite ultra-thin strip |
-
2012
- 2012-04-17 CN CN 201220162785 patent/CN202764278U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103394510A (en) * | 2013-07-31 | 2013-11-20 | 山东莱芜金石集团有限公司 | Cold-rolled copper and aluminum composite material production process |
| CN103599932A (en) * | 2013-11-20 | 2014-02-26 | 银邦金属复合材料股份有限公司 | Rolling compositing process of aluminum-clad steel pipe material |
| CN103599932B (en) * | 2013-11-20 | 2016-03-02 | 银邦金属复合材料股份有限公司 | A kind of composite technique for rolling covering aluminum steel tube material |
| CN105618479A (en) * | 2016-03-28 | 2016-06-01 | 太原科技大学 | Method utilizing herringbone ripple roller to roll composite plate strip |
| CN106086730A (en) * | 2016-07-28 | 2016-11-09 | 汉舟四川铜铝复合科技有限公司 | A kind of Technology for Heating Processing of copper aluminum composite material |
| CN107552564A (en) * | 2017-08-04 | 2018-01-09 | 无锡银荣板业有限公司 | The hot-rolled production process of copper-aluminum composite board |
| CN109174966A (en) * | 2018-08-24 | 2019-01-11 | 湖南科技大学 | Al/Cu/Mg composite board rolls preparation method |
| CN109174966B (en) * | 2018-08-24 | 2019-10-11 | 湖南科技大学 | Al/Cu/Mg composite board rolls preparation method |
| CN113290049A (en) * | 2021-05-15 | 2021-08-24 | 铜陵学院 | Preparation method of room-temperature rolling multi-layer layered copper-aluminum composite ultra-thin strip |
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Granted publication date: 20130306 |
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