CN101645333B - Rolling method for producing copper clad aluminum row - Google Patents

Rolling method for producing copper clad aluminum row Download PDF

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Publication number
CN101645333B
CN101645333B CN200810117916XA CN200810117916A CN101645333B CN 101645333 B CN101645333 B CN 101645333B CN 200810117916X A CN200810117916X A CN 200810117916XA CN 200810117916 A CN200810117916 A CN 200810117916A CN 101645333 B CN101645333 B CN 101645333B
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China
Prior art keywords
copper
copper pipe
rolling
clad aluminum
copper clad
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Expired - Fee Related
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CN200810117916XA
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Chinese (zh)
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CN101645333A (en
Inventor
于隆祥
曹代河
舒旭东
金其坚
李彦利
沈健
陈剑秋
李子睿
盛文
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Xiamen Torch SpecialMetals Materials Co.,Ltd
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Beijing General Research Institute for Non Ferrous Metals
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Priority to CN200810117916XA priority Critical patent/CN101645333B/en
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Publication of CN101645333B publication Critical patent/CN101645333B/en
Expired - Fee Related legal-status Critical Current
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Abstract

The invention discloses a rolling method for producing a copper clad aluminum row, which comprises the following steps: 1, selecting a copper pipe with uniform wall thickness and an aluminum bar in transition fit with the inner wall of the copper pipe, and cleaning the copper pipe and the aluminum bar to remove oil stains and oxidation layers; 2, pressing the aluminum bar into the copper pipe to form a composite blank, and plugging two ends of the composite blank tightly; 3, heating the composite blank to between 300 and 540 DEG C, preserving the heat for 30 to 60 minutes, then thermally rolling the composite blank for 1 to 3 times, and coldly rolling the composite blank for 1 to 4 times; 4, straightening and acid-washing a rolled product; 5, carrying out diffusion treatment at the temperature of between 200 and 550 DEG C under the protection of nitrogen of one atmospheric pressure, and preserving the heat for 1 to 3 hours; and 6, drawing the treated product to form a final product. The rolling method for producing the copper clad aluminum row not only has short process flow and high production efficiency, but also can save limited resources and reduce the cost.

Description

A kind of rolling of production of copper clad aluminum busbar
Technical field
The present invention relates to a kind of production method of copper clad aluminum wire, this copper clad aluminum wire is that a class is used for the big electric current of conducting, especially for the metallic composite of polyphase source connection.
Background technology
At present, copper clad aluminum wire is a kind of novel dual metal composite material, economic and practical, environmental protection, saving copper resource, it is the ideal material that substitutes existing copper bar, application prospect is very wide, and the existing market annual requirement is about about 10~120,000 tons, along with China becomes world's electronics, daily necessities and electric equipment products manufacturing industry center gradually, the domestic market also will continue to increase to the demand of copper clad aluminum wire, estimate to reach 15~200,000 tons within 5 years.This product adopts unique technology manufacturing, have good mechanical and electric property, be widely used in electric power, the connecting line row of stand-by power supply storage batteries such as communication, bus duct, Transformer Winding, the high and low pressure switch cubicle, high, heating in medium frequency equipment, transformer room's house lead in connecting line row, the crane trolley, industries such as transformer.
The method of production of copper alclad section bar has following several at present: 1. early being applied to industrial method is the aluminum steel copper-plating method, and it is to obtain the method for copper-clad aluminum conductor at aluminum core line surface electrical copper facing layer.This method is comparatively easy, but the composition of coating is impure, fragility is big, and copper plate and aluminum core line decentraction often, is difficult to satisfy the instructions for use of coaxial cable, and the method is eliminated at present.2. rolling crimping method.Will through cleaning and two copper strips of heating from both direction metallized aluminum heart yearn up and down, utilize the roll applied pressure that copper strips is crimped on aluminum core line, two lugs excisions with the copper strips seam form the line bases then.The line base is carried out the wire rod that drawing obtains required diameter, give the wire rod desired properties by heat treatment again.This method has advantages such as good product quality, production efficiency height and environmental protection, but the technology more complicated, the operation that relates to is many, and the roll compacting equipment investment is big, thereby production cost is higher.The external employing mostly indulged the bag rolling.What 3. use at present was maximum is the clad welded method, and its technological principle is to adopt the clad welded device, will progressively form the pipe shape through the copper strips that cleans, and is coated on around the aluminum core line that cleaned.Adopt argon arc welding that the longitudinal seam welding of copper pipe is got up to form the line base.Obtain required gauge or diameter of wire and performance by drawing and heat treatment then.This technology pattern is comparatively simple, and equipment is not too complicated, and the copper-clad aluminum conductor quality of being produced is better, is present domestic main production methods.4. another process is quiet liquid extrusion, it is a kind of special lubricated extrusion process, the basic principle of preparation copper cover aluminum wire rod is that the composite blank that major diameter red copper pipe and fine aluminium rod base are made is obtained the line base through quiet liquid extruding, utilize high hydrostatic pressure, and process the metallurgical binding between deformation rate effect realization copper, the aluminium greatly.Its process characteristic is: in extrusion process, be full of resisting medium around the blank, pressure acts on the blank by medium, blank is subjected to hydrostatic pressures such as uniform, in extrusion process, there is not the jumping-up distortion, do not contact with extrusion axis, recipient, the friction between deformed area and the extrusion die is controlled in the minimum zone, therefore can both keep than homogeneous deformation from the top layer to the core.5. liquid aluminium casting method.Clad material copper is prefabricated into the uniform copper pipe of wall thickness, then copper pipe inside is cleaned, remove its surperficial greasy dirt and oxide layer; Afterwards at copper pipe inwall plating layer protective layer; Copper pipe is carried out preliminary treatment, be heated to 500~700 ℃; Under inert gas shielding, the motlten metal of casting core material aluminium in copper pipe, pouring temperature is the melting temperature of aluminium, above-mentioned aluminum core copper wire is handled forming copper clad aluminum wire again through rolling, drawing.
In sum, the preparation technology of copper cover aluminum section bar adopts the solid phase combined techniques basically, promptly makes two kinds of melts combine faces be close to interatomic distance by plastic deformation, forms a large amount of binding sites, through heat diffusion treatment, finally forms the strong bonded at interface.The core requirement of copper cover aluminum product moulding is to guarantee the reliable combination of intermetallic.More than the problem that exists of various processes be: the cleannes to blank require very high, by the lower and repeatedly annealing of line base to the total working modulus of finished product, because bigger mechanical property difference between copper and the aluminium, be easy to cause producing in the little working modulus drawing course of processing defectives such as fracture of the local cracking in interface, coating layer and core, cause rate of finished products and conductivity to reduce.And the casting liquid metal is easy to generate pore, loose and composition inequality, and crystal grain is thick, defectives such as thermal stress.And the described copper cover aluminum preparation technology of this patent has overcome the shortcoming of above technology, and not only total working modulus height, and need not intermediate annealing has improved the situation that the local cracking in copper aluminium interface and coating layer and core rupture in the course of processing greatly; Simultaneously, because be the solid phase combination, also do not have the existing defective of solid-liquid combined techniques, its rate of finished products and conductivity are all higher.So this method not only technological process is short, the production efficiency height can also be saved limited resources, reduces cost.This not only helps the technological progress of copper cover aluminum composite material production industry and the upgrading of Related product, and also has great significance for China's economic growth and social progress.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, provide a kind of technology simple, the rolling of easy to operate production of copper clad aluminum busbar.
For achieving the above object, the present invention takes following technical scheme:
A kind of rolling of production of copper clad aluminum busbar, this method comprises the steps:
First step, select the uniform copper pipe of wall thickness and with the copper pipe inwall aluminium bar of interference fits mutually, copper pipe inner surface and aluminium bar outer surface are cleaned up removal greasy dirt and oxide layer;
Second step is pressed into aluminium bar and forms composite blank in the copper pipe, and the two ends shutoff is tight;
Third step is heated to 300~540 ℃ with above-mentioned composite blank, is incubated 30~60 minutes, carries out the hot rolling of 1~3 passage then, reaches the cold rolling of 1~4 passage, and the rolling pass working modulus is controlled at 20~60%;
The 4th step, with the copper clad aluminum wire of preparing in the third step align, pickling;
The 5th step under an atmospheric nitrogen protection, is carried out DIFFUSION TREATMENT to the copper clad aluminum wire of preparing in the 4th step, and temperature is 200~550 ℃, is incubated 1~3 hour;
The 6th step is drawn into final products with the copper clad aluminum wire of preparing in the 5th step, with dimensional accuracy and the working strength requirement that reaches copper clad aluminum wire.
Advantage of the present invention is: China's copper resource scarcity, and bauxite resource is abundanter, with aluminium substitution copper, and exploitation copper aluminum composite material and processing technology of preparing and technology, being the important channel of saving the copper resource, reducing production costs, also is the new material development direction that state key is supported.Based on above-mentioned background, domestic existing many companies begin to develop the processing technology of preparing of copper clad aluminum wire, but all have certain problem.And the rolling of production of copper clad aluminum busbar of the present invention not only technological process is short, the production efficiency height can also be saved limited resources, reduces cost.This not only helps the technological progress of copper cover aluminum composite material production industry and the upgrading of Related product, and also has great significance for China's economic growth and social progress.
Description of drawings
Fig. 1 is the made copper clad aluminum wire finished product schematic diagram of rolling of the present invention.
Embodiment
Embodiment 1: 1. select the uniform copper pipe of wall thickness and with the copper pipe inwall size aluminium bar of interference fits mutually, sulfuric acid solution with 15wt%~30wt% soaks copper pipe and aluminium bar then, after a period of time soaks, wash with clear water, dry the back and scrub copper pipe inwall and aluminium bar outer wall, remove its surface impurity and oxide layer with steel brush.2. above-mentioned aluminium bar is pressed in the copper pipe, two ends are tight with the plug at end part of copper pipe, make composite blank; Composite blank is heated to 300 ℃ afterwards, is incubated 60 minutes, roll is preheated to 200 ℃, is incubated 30 minutes, is rolled then.At first carry out the hot rolling of two passages, treat to carry out the cold rolling of two passages again behind the composite blank natural cooling, pass reduction is controlled between 20%~60%.3. above-mentioned semi-finished product are aligned and pickling, made it reach the dimensional requirement of finished product substantially.4. under an atmospheric nitrogen protection, through 200 ℃, 3 hours heat diffusion treatment makes and forms metallurgical binding layer closely between copper aluminium.5. be drawn into the copper clad aluminum wire that meets size and instructions for use.Made copper clad aluminum wire finished product schematic diagram as shown in Figure 1, in Fig. 1, the skin of copper clad aluminum wire is a copper layer 1, internal layer is an aluminium core 2, copper layer 1 metallized aluminum core 2.
Embodiment 2: 1. select the uniform copper pipe of wall thickness and with the copper pipe inwall size aluminium bar of interference fits mutually, sulfuric acid solution with 15wt%~30wt% soaks copper pipe and aluminium bar then, after a period of time soaks, wash with clear water, dry the back and scrub copper pipe inwall and aluminium bar outer wall, remove its surface impurity and oxide layer with steel brush.2. above-mentioned aluminium bar is pressed in the copper pipe, two ends are tight with the plug at end part of copper pipe, make composite blank; Composite blank is heated to 480 ℃ afterwards, is incubated 50 minutes, roll is preheated to 300 ℃, is incubated 30 minutes, is rolled then.At first carry out the hot rolling of two passages, treat to carry out the cold rolling of two passages again behind the composite blank natural cooling, pass reduction is controlled between 20%~60%.3. above-mentioned semi-finished product are aligned and pickling, made it reach the dimensional requirement of finished product substantially.4. under an atmospheric nitrogen protection, through 300 ℃, 2 hours heat diffusion treatment makes and forms metallurgical binding layer closely between copper aluminium.5. be drawn into the copper clad aluminum wire that meets size and instructions for use.Made copper clad aluminum wire finished product schematic diagram as shown in Figure 1, in Fig. 1, the skin of copper clad aluminum wire is a copper layer 1, internal layer is an aluminium core 2, copper layer 1 metallized aluminum core 2.
Embodiment 3: 1. select the uniform copper pipe of wall thickness and with the copper pipe inwall size aluminium bar of interference fits mutually, sulfuric acid solution with 15wt%~30wt% soaks copper pipe and aluminium bar then, after a period of time soaks, wash with clear water, dry the back and scrub copper pipe inwall and aluminium bar outer wall, remove its surface impurity and oxide layer with steel brush.2. above-mentioned aluminium bar is pressed in the copper pipe, two ends are tight with the plug at end part of copper pipe, make composite blank; Composite blank is heated to 540 ℃ afterwards, is incubated 30 minutes, roll is preheated to 300 ℃, is incubated 30 minutes, is rolled then.At first carry out the hot rolling of two passages, treat to carry out the cold rolling of two passages again behind the composite blank natural cooling, pass reduction is controlled between 20%~60%.3. above-mentioned semi-finished product are aligned and pickling, made it reach the dimensional requirement of finished product substantially.4. under an atmospheric nitrogen protection, through 550 ℃, 1 hour heat diffusion treatment makes and forms metallurgical binding layer closely between copper aluminium.5. be drawn into the copper clad aluminum wire that meets size and instructions for use.Made copper clad aluminum wire finished product schematic diagram as shown in Figure 1, in Fig. 1, the skin of copper clad aluminum wire is a copper layer 1, internal layer is an aluminium core 2, copper layer 1 metallized aluminum core 2.

Claims (1)

1. the rolling of a production of copper clad aluminum busbar is characterized in that, this method comprises the steps:
First step, select the uniform copper pipe of wall thickness and with the copper pipe inwall aluminium bar of interference fits mutually, sulfuric acid solution with 15wt%~30wt% soaks copper pipe and aluminium bar, after the immersion, wash with clear water, dry the back and scrub copper pipe inwall and aluminium bar outer wall, copper pipe inner surface and aluminium bar outer surface are cleaned up, remove greasy dirt and oxide layer with steel brush;
Second step is pressed into aluminium bar and forms composite blank in the copper pipe, and the two ends shutoff is tight;
Third step is heated to 300~540 ℃ with above-mentioned composite blank, is incubated 30~60 minutes, carries out the hot rolling of 1~3 passage then, reaches the cold rolling of 1~4 passage, and the rolling pass working modulus is controlled at 20~60%;
The 4th step, with the copper clad aluminum wire of preparing in the third step align, pickling;
The 5th step under an atmospheric nitrogen protection, is carried out DIFFUSION TREATMENT to the copper clad aluminum wire of preparing in the 4th step, and temperature is 200~550 ℃, is incubated 1~3 hour;
The 6th step is drawn into final products with the copper clad aluminum wire of preparing in the 5th step.
CN200810117916XA 2008-08-05 2008-08-05 Rolling method for producing copper clad aluminum row Expired - Fee Related CN101645333B (en)

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102684025A (en) * 2011-03-09 2012-09-19 苏州工业园区安固电器有限公司 Double-metal commutating sheet and processing process thereof
CN102303216B (en) * 2011-08-26 2014-12-10 孙华桥 Method for producing copper-clad aluminum bar
JP5530464B2 (en) * 2012-01-11 2014-06-25 トヨタ自動車株式会社 Bus bar for power control unit
CN104575693A (en) * 2013-10-16 2015-04-29 东莞市龙卓电子有限公司 Copper aluminum alloy wire and manufacturing technology thereof
CN104409136B (en) * 2014-12-22 2016-09-07 孙华桥 A kind of preparation method of compound conductive bar
CN110394373B (en) * 2019-07-25 2020-12-29 宝鸡特钢钛业股份有限公司 Flat bar manufacturing method based on multilayer composite pipe
CN110695093B (en) * 2019-10-09 2021-01-01 西藏克瑞斯科技有限公司 High-performance steel rolling method

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CN101051541A (en) * 2007-05-09 2007-10-10 大连信瑞科技有限公司 Method for producing copper cladded aluminum row
CN101060025A (en) * 2007-05-09 2007-10-24 大连信瑞科技有限公司 Manufacturing method of copper-clad aluminum busbar
CN101123129A (en) * 2007-09-11 2008-02-13 丹阳市中信化工电器设备有限公司 A production method for copper-coated aluminum material
CN201044187Y (en) * 2007-05-09 2008-04-02 大连信瑞科技有限公司 Novel copperclad aluminium arrangement

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CN101051541A (en) * 2007-05-09 2007-10-10 大连信瑞科技有限公司 Method for producing copper cladded aluminum row
CN101060025A (en) * 2007-05-09 2007-10-24 大连信瑞科技有限公司 Manufacturing method of copper-clad aluminum busbar
CN201044187Y (en) * 2007-05-09 2008-04-02 大连信瑞科技有限公司 Novel copperclad aluminium arrangement
CN101123129A (en) * 2007-09-11 2008-02-13 丹阳市中信化工电器设备有限公司 A production method for copper-coated aluminum material

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Address after: 361100 327 Torch Road, Xiamen torch hi tech Zone, Huli District, Fujian, Xiamen

Patentee after: Xiamen Torch SpecialMetals Materials Co.,Ltd

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Patentee before: General Research Institute for Nonferrous Metals

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