CN102671946A - Copper aluminum composite board and preparation method thereof - Google Patents
Copper aluminum composite board and preparation method thereof Download PDFInfo
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- CN102671946A CN102671946A CN2011104407422A CN201110440742A CN102671946A CN 102671946 A CN102671946 A CN 102671946A CN 2011104407422 A CN2011104407422 A CN 2011104407422A CN 201110440742 A CN201110440742 A CN 201110440742A CN 102671946 A CN102671946 A CN 102671946A
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Abstract
The invention discloses a preparation method of a copper aluminum composite board, and the method comprises the following steps of: 1) carrying put single-face oil removal and scale removal on copper board strips, and coating a layer of brazing flux, for later use; and 2) oppositely setting the surfaces of the two copper board strips coated with the brazing flux, and injecting semisolid aluminum between the two copper board strips to carry out oxygen-free continuous casting and rolling, so as to obtain the copper aluminum composite board. The preparation method of the copper aluminum composite board comprises the following steps of: preparing the copper aluminum composite board by an oxygen-free continuous casting and rolling method, cleaning the surfaces of the copper strips and coating a layer of the brazing flux before the process of continuously casting and rolling, wherein the liquid aluminum liquid is equal to brazing filler metal in the process of continuously casting and rolling; and carrying out welding after the aluminum liquid is contacted with the copper board strips, wherein the brazing flux coated on the surfaces of the copper board strips can be used for removing residual oxide on the surface of the brazing filler metal (the aluminum liquid) and the copper board strips, improving the wettability between the aluminum liquid and the copper board strips, and improving the seaming quality, so that the bond strength of the copper aluminum composite board can be greatly improved and can reach about 150MPa.
Description
Technical field
The present invention relates to a kind of copper-aluminum composite board, and the preparation method of this copper-aluminum composite board.
Background technology
Copper has favorable conductive, heat conduction, corrosion resistant and bacteriostasis property, thereby is widely used, but the density of copper is big, and price is high, and resource is shortage relatively.And China's bauxite resource rich, the density of aluminium is lower, and low price has become good copper substituting material in a lot of fields.Yet the conduction of aluminium, heat conductivility be not as copper, and welding, arc extinguishing, performance such as wear-resisting are also relatively poor, therefore in some occasion, like product scopes such as switch, fin, rebounds, are difficult with the direct instead of copper of aluminium.At present; The copper aluminum bronze 3-layer composite material of the advantage of low cost of a kind of high stability that has combined copper and aluminium has substituted fine copper or pure aluminum material gradually; With its special combination property, electric power, heat transfer, military project, electronic computer, electric elements, aerospace field, automobile and every field such as civilian have been widely used in.
At present; Gu the manufacturing process of copper aluminum bronze 3-layer composite material mainly is solid-complex method; Produce through rolling crimping method, clad welded method, explosion composite algorithm, composite ingot hot rolling method, continuously extruded welding etc., have shortcomings such as complex manufacturing, production cost is high, efficient is low, combined strength bination is low.Gu employing liquid-complex method is also arranged, liquid state or semisolid aluminum or aluminum alloy and solid-state copper coin are carried out the anaerobic continuous casting and rolling, make the copper-aluminum composite board band.CN101758071 discloses the production method of a kind of aluminium and copper composite metal band, adopts the method for anaerobic continuous casting and rolling to prepare the copper-aluminum composite board band.This method need be carried out online the polishing to the non-oxidation layer, technology more complicated, and the bond strength of copper aluminium lower (about 100MPa) before copper aluminium combines.
Summary of the invention
The preparation method who the purpose of this invention is to provide a kind of copper-aluminum composite board saves online polishing step, simplifies preparation section, improves the bond strength of copper-aluminum composite board simultaneously.
In order to realize above purpose, the technical scheme that the present invention adopted is: a kind of preparation method of copper-aluminum composite board, and its step is following:
1) the copper coin band is carried out the single face oil removing and descale, apply one deck brazing flux, subsequent use;
2) surface that two flat copper strips is coated with brazing flux is oppositely arranged, and between two flat copper strips, injects semi-solid aluminium and carries out the anaerobic continuous casting and rolling, obtains copper-aluminum composite board.
Said brazing flux is that 4: 6～7: 3 stripper and activating agent formed by mass ratio.
Said stripper is a potassium fluoborate.
Said activating agent is a boric anhydride.
Step 1) is said before the copper coin belt surface applies brazing flux, and the binding agent and 30%～50% solvent of brazing flux and its weight 4%～15% is even, dries after the coating.
Said binding agent is acrylic resin or butadiene resin.
Said solvent is acetone or methyl acetate.
The thickness of said coating brazing flux is 0.01～0.05mm.
Rolling volume under pressure is 40%～60% during said continuous casting and rolling.
The preparation method of copper-aluminum composite board of the present invention; Adopt the method for anaerobic continuous casting and rolling to prepare copper-aluminum composite board, before continuous casting and rolling, one deck brazing flux is cleared up and scribbled to copper strip surface, aluminium liquid liquid when continuous casting and rolling is equivalent to solder; Aluminium liquid contacts the back and realizes welding with the copper coin band; The brazing flux that is coated in the copper coin belt surface can be removed the residual oxide of solder (aluminium liquid) and copper coin belt surface, improves the wetability of aluminium liquid and copper coin band, improves welding quality; Thereby the bond strength of copper-aluminum composite board is improved greatly, can reach about 150MPa.The copper coin band can carry out protection against oxidation to oil removing of copper coin band and the surface that descales after applying brazing flux in addition.
Description of drawings
Fig. 1 is the structural representation of casting apparatus among the embodiment.
The specific embodiment
Embodiment 1
The copper-aluminum composite board of present embodiment adopts following method preparation:
1) takes by weighing potassium fluoborate stripper and boric anhydride activating agent respectively in 7: 3 ratio, make 100kg brazing flux powder after the mixing; Add acrylic resin 10Kg as binding agent, purpose is to form the brazing flux film at the copper coin belt surface, adds 30Kg acetone again, stirs and processes the brazing flux slurry, and is subsequent use;
2) the copper coin band is carried out the single face oil removing and descale, apply the brazing flux slurry, after the acetone volatilization, forming a layer thickness is the brazing flux film of 0.01～0.05mm, can adopt the mode of spraying;
3) the brazing flux surface that is coated with two flat copper strips is oppositely arranged; Between two flat copper strips, inject semi-solid aluminium and carry out the on-line continuous soldering; During this time brazing flux at high temperature melt and with faying face on small portion of residual oxide reaction with its removal, to guarantee its welding quality; Complex travels forward and carries out continuous casting and rolling, and rolling volume under pressure is 60%, obtains the copper-aluminum composite board band, and the copper-aluminum composite board band is batched after cooling off 1～5min naturally.
The bond strength of resulting copper-aluminum composite board is 150MPa.
Continuous casting and rolling can adopt conventional anaerobic continuous casting and rolling device to carry out; Also can adopt casting apparatus as shown in Figure 1 to carry out the anaerobic continuous casting and rolling: this device comprises the reservoir 2 that is used to store aluminium liquid 1; The bottom of this reservoir 2 is communicated with a continuous casting guide groove 8, and this guide groove 8 is provided with the baffle plate (not shown) along company's side of continuous casting direction.At guide groove 8 preheating deflector roll 4 and following preheating deflector roll 9, last preheating deflector roll 4 and the front and back setting on the continuous casting direct of travel of following preheating deflector roll 9 be set respectively up and down; Guide groove 8 bottoms offer near the position of descending preheating deflector roll 9 and are used for the strip crevice of copper coin band 10 insertions down; The top of guide groove is provided with a bit of towards the acclivitous retaining of continuous casting direct of travel edge; The front end and the last preheating deflector roll 4 on this retaining edge are tangent; Be reserved with the strip crevice that is used for 3 insertions of copper coin band equally, and tangent position to be higher than the minimum point of preheating deflector roll 4.The water-cooled roll that is provided with paired setting foremost 5,7 of guide groove 8 is used for complex is rolled, and obtains copper-aluminum composite board 6 after rolling.
During work, last copper coin band 3 is oppositely arranged with the surface that following copper coin band 10 has brazing flux, is brought in the guide groove 8 with following preheating deflector roll 9 by last preheating deflector roll 4 respectively; Be preheated to 350～400 ℃ simultaneously, with aluminium liquid after degasification and leaving standstill, two copper coin interbands in 690～730 ℃ of continuous and quantitatives are injected into; Aluminium liquid makes the brazing flux fusing of copper coin belt surface; Remove the oxide of contact-making surface, improve the wetability of aluminium liquid, realize that good fusion between the two forms complex plate strip the copper coin belt surface; Remaining brazing flux with and remove product behind the oxide swims in aluminium liquid because of density is less surface; Binding agent also can be overflowed behind heating and gasifying; Because a bit of retaining of guide groove is along being inclined upwardly and the point of contact is higher than the minimum point of preheating deflector roll 4; Product can swim in aluminium liquid surface, can not get in the copper-aluminum composite board thereupon.When aluminium liquid heated the copper coin band, aluminium liquid got into half curdled appearance fast, and the semisolid-state clad plate band gets into and is with the roll of cooling device to be rolled subsequently, is reduced to below the solid state temperature of aluminium, obtains the copper-aluminum composite board band of desired thickness.
Embodiment 2
The copper-aluminum composite board of present embodiment adopts following method preparation:
1) takes by weighing potassium fluoborate stripper and boric anhydride activating agent respectively in 5: 4 ratio, make 100kg brazing flux powder after the mixing; Add acrylic resin 15Kg as binding agent, purpose is to form the brazing flux film at the copper coin belt surface, adds 40Kg acetone again, stirs and processes the brazing flux slurry, and is subsequent use;
2) the copper coin band is carried out the single face oil removing and descale, apply the brazing flux slurry, after the acetone volatilization, forming a layer thickness is the brazing flux film of 0.01～0.05mm;
3) the brazing flux surface that is coated with two flat copper strips is oppositely arranged, between two flat copper strips, inject semi-solid aluminium and carry out the on-line continuous soldering, during brazing flux at high temperature with faying face on the reaction of small portion of residual oxide with its removal, to guarantee its welding quality; Complex travels forward and carries out continuous casting and rolling, and rolling volume under pressure is 40%, obtains the copper-aluminum composite board band, and the copper-aluminum composite board band is batched after cooling off 1～5min naturally.
The bond strength of resulting copper-aluminum composite board is 147MPa.
The anaerobic continuous casting and rolling device that present embodiment adopted is identical with embodiment 1.
Embodiment 3
The copper-aluminum composite board of present embodiment adopts following method preparation:
1) takes by weighing potassium fluoborate stripper and boric anhydride activating agent respectively in 4: 6 ratio, make 100kg brazing flux powder after the mixing; Add butadiene resin 4Kg as binding agent, purpose is to form the brazing flux film at the copper coin belt surface, adds 50Kg ethyl acetate again, stirs and processes the brazing flux slurry, and is subsequent use;
2) the copper coin band is carried out the single face oil removing and descale, apply the brazing flux slurry, after the acetone volatilization, forming a layer thickness is the brazing flux film of 0.01～0.05mm;
3) the brazing flux surface that is coated with two flat copper strips is oppositely arranged, between two flat copper strips, inject semi-solid aluminium and carry out the on-line continuous soldering, during brazing flux at high temperature with faying face on the reaction of small portion of residual oxide with its removal, to guarantee its welding quality; Complex travels forward and carries out continuous casting and rolling, and rolling volume under pressure is 50%, obtains the copper-aluminum composite board band, and the copper-aluminum composite board band is batched after cooling off 1～5min naturally.
The bond strength of resulting copper-aluminum composite board is 154MPa.
The anaerobic continuous casting and rolling device that present embodiment adopted is identical with embodiment 1.
Need to prove; Specific embodiment of the present invention only is used for explanation and non-limiting technical scheme of the present invention; The brazing flux that releasing agent that wherein uses among the embodiment and activating agent are formed is a kind of optimized choice of the present invention; But other brazing flux liquid of other suitable copper and aluminium can play the effect of deoxygenation equally, should also can realize the object of the invention.
Claims (10)
1. the preparation method of a copper-aluminum composite board, it is characterized in that: its step is following:
1) the copper coin band is carried out the single face oil removing and descale, apply one deck brazing flux, subsequent use;
2) surface that two flat copper strips is coated with brazing flux is oppositely arranged, and between two flat copper strips, injects semi-solid aluminium and carries out the anaerobic continuous casting and rolling, obtains copper-aluminum composite board.
2. the preparation method of copper-aluminum composite board according to claim 1 is characterized in that: said brazing flux is that 4: 6～7: 3 stripper and activating agent formed by mass ratio.
3. the preparation method of copper-aluminum composite board according to claim 2, it is characterized in that: said stripper is a potassium fluoborate.
4. the preparation method of copper-aluminum composite board according to claim 2, it is characterized in that: said activating agent is a boric anhydride.
5. according to the preparation method of each described copper-aluminum composite board of claim 1～4; It is characterized in that: step 1) is said before the copper coin belt surface applies brazing flux; The binding agent and 30%～50% solvent of brazing flux and its weight 4%～15% is even, dry after the coating.
6. the preparation method of copper-aluminum composite board according to claim 5, it is characterized in that: said binding agent is acrylic resin or butadiene resin.
7. the preparation method of copper-aluminum composite board according to claim 5, it is characterized in that: said solvent is acetone or methyl acetate.
8. the preparation method of copper-aluminum composite board according to claim 5, it is characterized in that: the thickness of said coating brazing flux is 0.01～0.05mm.
9. the preparation method of copper-aluminum composite board according to claim 1 is characterized in that: rolling volume under pressure is 40%～60% during said continuous casting and rolling.
10. employing such as the resulting copper-aluminum composite board of claim 1 preparation method.
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| CN201110440742.2A CN102671946B (en) | 2011-12-25 | 2011-12-25 | Copper aluminum composite board and preparation method thereof |
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| CN201110440742.2A CN102671946B (en) | 2011-12-25 | 2011-12-25 | Copper aluminum composite board and preparation method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103143565A (en) * | 2013-04-03 | 2013-06-12 | 郑州市合力铜业有限公司 | Production process of copper-aluminum bimetal composite plate |
| CN103537483A (en) * | 2013-10-16 | 2014-01-29 | 河南科技大学 | Method for manufacturing copper and aluminum composite strips and composite strip continuous casting device |
| CN103722139A (en) * | 2013-09-26 | 2014-04-16 | 河南科技大学 | Semi-solid slurrying device and composite board manufacturing device using semi-solid slurrying device |
| CN106238904A (en) * | 2016-08-30 | 2016-12-21 | 郑州机械研究所 | A kind of hard alloy and the activated diffusion method of attachment of steel |
| CN106271230A (en) * | 2016-08-30 | 2017-01-04 | 郑州机械研究所 | A kind of coating silver solder and preparation method thereof |
| CN108160708A (en) * | 2018-01-18 | 2018-06-15 | 燕山大学 | The casting and rolling device and method of a kind of double-level-metal composite plate of quick preparation with coating sandwich |
| CN109261915A (en) * | 2018-09-21 | 2019-01-25 | 浙江京良新材料科技有限公司 | A kind of Copper-Aluminum compound band production technology |
| CN112605121A (en) * | 2020-12-30 | 2021-04-06 | 郑州金辉新能源电子材料有限公司 | Copper-aluminum composite foil for PCB and preparation process thereof |
| CN112779482A (en) * | 2020-12-31 | 2021-05-11 | 洛阳铜一金属材料发展有限公司 | Metal plate of copper-aluminum composite high-strength steel wire and preparation method thereof |
| CN114101332A (en) * | 2021-11-19 | 2022-03-01 | 河南铜创有色金属科技有限公司 | Method and device for manufacturing copper-aluminum composite strip by using solid copper and liquid aluminum |
| CN114700479A (en) * | 2022-04-24 | 2022-07-05 | 连云港中彩科技有限公司 | Continuous casting semi-molten rolled copper-aluminum composite plate strip and production process thereof |
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| CN103143565A (en) * | 2013-04-03 | 2013-06-12 | 郑州市合力铜业有限公司 | Production process of copper-aluminum bimetal composite plate |
| CN103143565B (en) * | 2013-04-03 | 2015-11-11 | 郑州市合力铜业有限公司 | A kind of production technology of copper-aluminum bimetal composite plate |
| CN103722139A (en) * | 2013-09-26 | 2014-04-16 | 河南科技大学 | Semi-solid slurrying device and composite board manufacturing device using semi-solid slurrying device |
| CN103537483A (en) * | 2013-10-16 | 2014-01-29 | 河南科技大学 | Method for manufacturing copper and aluminum composite strips and composite strip continuous casting device |
| CN103537483B (en) * | 2013-10-16 | 2016-02-03 | 河南科技大学 | A kind of preparation method of Copper-Aluminum compound strip and complex plate strip casting apparatus |
| CN106271230A (en) * | 2016-08-30 | 2017-01-04 | 郑州机械研究所 | A kind of coating silver solder and preparation method thereof |
| CN106238904A (en) * | 2016-08-30 | 2016-12-21 | 郑州机械研究所 | A kind of hard alloy and the activated diffusion method of attachment of steel |
| CN106238904B (en) * | 2016-08-30 | 2018-11-20 | 郑州机械研究所有限公司 | A kind of activation diffusion connection method of hard alloy and steel |
| CN108160708A (en) * | 2018-01-18 | 2018-06-15 | 燕山大学 | The casting and rolling device and method of a kind of double-level-metal composite plate of quick preparation with coating sandwich |
| CN108160708B (en) * | 2018-01-18 | 2019-03-22 | 燕山大学 | A kind of casting and rolling device and method of double-level-metal composite plate of the quick preparation with coating sandwich |
| CN109261915A (en) * | 2018-09-21 | 2019-01-25 | 浙江京良新材料科技有限公司 | A kind of Copper-Aluminum compound band production technology |
| CN112605121A (en) * | 2020-12-30 | 2021-04-06 | 郑州金辉新能源电子材料有限公司 | Copper-aluminum composite foil for PCB and preparation process thereof |
| CN112779482A (en) * | 2020-12-31 | 2021-05-11 | 洛阳铜一金属材料发展有限公司 | Metal plate of copper-aluminum composite high-strength steel wire and preparation method thereof |
| CN114101332A (en) * | 2021-11-19 | 2022-03-01 | 河南铜创有色金属科技有限公司 | Method and device for manufacturing copper-aluminum composite strip by using solid copper and liquid aluminum |
| CN114700479A (en) * | 2022-04-24 | 2022-07-05 | 连云港中彩科技有限公司 | Continuous casting semi-molten rolled copper-aluminum composite plate strip and production process thereof |
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