CN105896118A - Al-Fe-B-RE aluminum alloy cable copper aluminum transition terminal and production method thereof - Google Patents

Al-Fe-B-RE aluminum alloy cable copper aluminum transition terminal and production method thereof Download PDF

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Publication number
CN105896118A
CN105896118A CN201610236897.7A CN201610236897A CN105896118A CN 105896118 A CN105896118 A CN 105896118A CN 201610236897 A CN201610236897 A CN 201610236897A CN 105896118 A CN105896118 A CN 105896118A
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China
Prior art keywords
copper
aluminium alloy
aluminum
aluminium
connecting tube
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CN201610236897.7A
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Chinese (zh)
Inventor
张晓欢
于贵良
赵岩
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Anhui Joy Sense Cable Co Ltd
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Anhui Joy Sense Cable Co Ltd
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Priority to CN201610236897.7A priority Critical patent/CN105896118A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/12—End pieces terminating in an eye, hook, or fork
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C22C21/14—Alloys based on aluminium with copper as the next major constituent with silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C22C21/16—Alloys based on aluminium with copper as the next major constituent with magnesium
    • 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
    • C22F1/057—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 of alloys with copper as the next major constituent
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/62—Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors
    • H01R4/625—Soldered or welded connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/16—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for manufacturing contact members, e.g. by punching and by bending

Abstract

The invention discloses an Al-Fe-B-RE aluminum alloy cable copper aluminum transition terminal belonging to the copper aluminum transition terminal technology field. The Al-Fe-B-RE aluminum alloy cable copper aluminum transition terminal comprises an aluminum alloy connecting pipe connected with a cable conductor and a copper lug connected with the other end of the aluminum alloy connecting pipe. A copper aluminum transition member is disposed between the aluminum alloy connecting pipe and the copper lug, and is an aluminum alloy having a cylindrical solid structure. The invention also provides the production method of the Al-Fe-B-RE aluminum alloy cable copper aluminum transition terminal. The production method is simple, and is easy to operate, the electrical performance, the mechanical performance, and the creep-resistance performance of the produced copper aluminum transition terminal are excellent, and under the condition of the constantly-changing temperature, the reliable connection can be guaranteed, the excellent thermostability and the excellent conductivity are provided, and in addition, the transition from the aluminum alloy cable to the connecting pipe to the copper lug is stable and smooth.

Description

Al-Fe-B-RE aluminium alloy cable copper-aluminum transition terminal and preparation method thereof
Technical field
The invention belongs to the technical field of copper-aluminum transition terminal, relate to aluminium alloy cable copper-aluminium transition end Son, is specifically related to a kind of Al-Fe-B-RE aluminium alloy cable copper-aluminum transition terminal and preparation method thereof.This The copper-aluminum transition terminal electrical resistance of invention, mechanicalness, creep-resistant property are excellent, and reliable in quality is not deposited In potential safety hazard.
Background technology
Along with the high speed development of China's economic construction, the demand of electric power is continued to increase by every profession and trade, electric wire The market space of cable industry is huge.But in electric wire product structure, account for the copper of main component, aluminum Conductor itself also exists the shortcoming being difficult to overcome, so that manufacture and design copper-aluminum transition terminal.
Existing copper-aluminum transition terminal is mainly made up of copper lug and common aluminium connecting tubes, its copper lug Main employing electrician's copper, the common aluminium of the many employings of connecting tube, such as 1350 board aluminiums, this ordinary copper aluminum mistake Cross terminal and there is following defect for aluminium alloy cable: 1, common aluminium is continually changing in temperature for a long time Creep is easily there is so that it is physical dimension produces irreversible change under effect.2, cylindrical connecting tube is used for Lv power cable special-shaped conductor (such as sector, tile-type, semi-circular), owing to the two shape difference is too big, Even if take shaping measure when joint, it is also difficult to ensure conductor to accomplish the profile of rounding, cause Between external surface and connecting tube inwall, space is uneven, runs steadily in the long term to cable and brings hidden danger.3、 Cable is mainly limited by terminal connective stability in safety in utilization, and aluminum current alloy cable is main Using copper-aluminum transition terminal, copper lug material is electrician's copper, connecting tube be fine aluminium be not aluminum close Gold copper-base alloy, which results in after aluminium terminal crimps with aluminium alloy conductor, in use there is safety Hidden danger, the mechanical strength of aluminium conductor is on the low side simultaneously, and welding performance is poor, and contact resistance is big, at engineering item In mesh, popularization and application are restricted.What 4, existing copper-aluminum transition terminal was aluminium connecting tubes with copper lug is straight Connect integrally welded structure, due to aluminum and the resistivity of copper, current capacity different, by the direct mistake of aluminum Crossing copper and can cause electric phenomenon, Cu and Al combination face is ruptured, is easily caused the harm such as electric shock, this existing Copper-aluminum transition terminal be transitioned into aluminum by aluminium alloy cable and be transitioned into copper, the mistake of switching mandatory, hard again Cross mode, there is serious quality problems and potential safety hazard.5, copper aluminium terminal is used in the market Production technology, commonly used copper, aluminium bar are first welded after punch forming process, and copper rod is striking out During close to 90 ° of planes, copper cross section, commissure stretches inclination and distortion to by pressing direction, then due to aluminum ratio copper Ductility good, therefore cause the aluminum in joint edge equally toward being stretched by pressing direction, make whole weld seam incline Tiltedly deformation, causes the molecule crystallographic texture of aluminum cross-sectional perimeter to make a variation, and crackle, the phenomenon such as loose occurs, (DTL type products belongs to direct butt welded seam punching press, and weld seam affects to affect the firmness of whole solder side Even more serious), and the firmness of copper and aluminium welding junction is the place that whole adapter is the most key.Make By not prison welding when solid, rosin joint and solder side molecule crystallographic texture affected copper aluminum adapter, easily go out The phenomenons such as the fracture of existing Cu and Al combination face and couple corrosion, cause power breakdown, electric shock and breaking out of fire thing Therefore.
The connecting tube using aluminum alloy material also having and copper lug, although this kind of design is to a certain degree On the output of electric power had improvement result, but this kind of transient mode still exists and increases at faying face resistance Greatly, be easily short-circuited, burning and cross section fracture problem, copper-aluminium transition district occur electrochemical reaction And bottle neck effect.Thus, for the further development of aluminium alloy cable industry, study and solve copper aluminum mistake The technical scheme crossing terminal is the most in the urgent need to address.
Summary of the invention
The present invention solves that in prior art, copper-aluminum transition terminal is because of its electrical resistance, mechanicalness, creep resistant Sexuality is poor, causes aluminium alloy cable to there is great quality problems and peace in reality application connects The problem of full hidden danger, it is provided that a kind of Al-Fe-B-RE aluminium alloy cable copper-aluminum transition terminal and preparation thereof Method.The copper-aluminum transition terminal electrical resistance of the present invention, mechanicalness, creep-resistant property are excellent, in temperature In the case of being continually changing, it may have reliably connectivity, there is heat stability and the electric conductivity of excellence, From aluminium alloy cable to connecting tube, the transition to copper lug is steady, gentle.
The present invention the technical scheme is that for realizing its purpose
Al-Fe-B-RE aluminium alloy cable copper-aluminum transition terminal, including the aluminium alloy being connected with cable conductor The copper lug that connecting tube is connected with the aluminium alloy connecting tube other end, at aluminium alloy connecting tube and copper lug Between be provided with copper-aluminium transition part, described copper-aluminium transition part is the aluminium alloy of column solid construction, described Copper-aluminium transition part comprise by weight percentage: Si 0.08-0.1%, Fe 0.07-0.33%, Cu 0.15-0.23%, Mg 0.08-0.12%, B 0.5-0.87%, Mn 0.1-0.15%, Ti 0.18-0.27%, Co 0.1-0.2%, Ta 0.03-0.05%, Ni 0.15-0.38%, Sc 0.028-0.03%, RE0.1-0.6%, Ag 0.01-0.05%, Bi 0.0005-0.0008%, Sb 0.01-0.035%, Hf 0.001-0.0015%, Pb 0.001-0.0015%, Cd0.001-0.003%, Sn0.001-0.003%, Be0.001-0.003%, Surplus is aluminum.This copper-aluminium transition part chemical composition and control of ratio, improve copper-aluminium transition district heat swollen Swollen coefficient, improves anti-overload ability, it is achieved that aluminium alloy connecting tube electric current is to the steady mistake of copper lug Cross.
Described copper-aluminium transition part comprises by weight percentage: Si 0.085-0.095%, Fe 0.1-0.3%, Cu 0.17-0.21%, Mg 0.09-0.11%, B 0.55-0.75%, Mn 0.12-0.14%, Ti 0.2-0.23%, Co 0.13-0.17%, Ta 0.035-0.045%, Ni 0.2-0.35%, Sc 0.0285-0.0295%, RE0.2-0.5%, Ag 0.02-0.04%, Bi 0.0006-0.0007%, Sb 0.015-0.03%, Hf 0.0012-0.0014%, Pb 0.0011-0.0013%, Cd0.0015-0.0025%, Sn0.0015-0.0025%, Be0.0015-0.0025%, surplus are aluminum.
The diameter of described copper-aluminium transition part less than the diameter of aluminium alloy connecting tube, this design mainly due to The length of copper-aluminium transition part is less than the length of aluminium alloy connecting tube, in order to ensure the electricity of aluminium alloy connecting tube Flow to the smooth transition of copper-aluminium transition part, should ensure that the stability of transmission resistance, reduce resistance slowly, So inventor is by little for the diameter than aluminium alloy connecting tube of the diameter design of copper-aluminium transition part, further Preferably, the 1/4-1/3 of a length of aluminium alloy connecting tube length of copper-aluminium transition part, copper-aluminium transition part The 1/3-1/2 of a diameter of aluminium alloy connecting tube diameter.
The material composition of aluminium alloy connecting tube is identical with the material composition of the cable conductor connected, and this sets Meter makes the transition of aluminium alloy connecting tube and cable conductor naturally steadily, do not result in electric current skip a grade or Significantly fluctuate, reduce transmission resistance, it is to avoid the fever phenomenon caused through various kinds of media matter.
Described aluminium alloy connecting tube comprises by weight percentage: Si 0.08-0.13%, Fe 0.05-1.3%, Cu 0.05-0.13%, Mg 0.05-0.2%, B 0.05-0.27%, Mn 0.07-0.18%, Ti 0.15-0.26%, Co 0.06-0.12%, Ta 0.05-0.09%, Ni 0.05-0.28%, Sc 0.025-0.033%, RE0.1-0.6%, Be0.001-0.003%, surplus are aluminum.This aluminium alloy connecting tube goes for owning Aluminium alloy cable, this aluminium alloy connecting tube without considering the chemical composition of aluminium alloy cable, by control Make the ratio of each element of this aluminium alloy connecting tube, can be prevented effectively from due to sending out that medium difference causes Thermal phenomenon, equally realizes natural, the smooth transition of cable conductor and aluminium alloy connecting tube, will not Cause electric current to skip a grade and fluctuate widely.
Described aluminium alloy connecting tube is stifled oil type structure.
The material of described copper lug is T1 fine copper or T2 fine copper.
Described copper lug is L-type, including the base plate being connected with chopper and the connection being connected with base plate Post, the other end connecting post is connected with copper-aluminium transition part.Preferably, diameter and the copper aluminum mistake of post are connected The diameter crossing part is identical.
A kind of method preparing Al-Fe-B-RE aluminium alloy cable copper-aluminum transition terminal, comprises the following steps:
A, the casting of semi-finished product: take the material composition of aluminium alloy connecting tube, melted rear cast molding, To aluminium alloy connecting tube semi-finished product, take the material composition of copper-aluminium transition part, melted rear cast molding, To copper-aluminium transition part semi-finished product；
B, the casting of copper lug: take TI fine copper or T2 fine copper, melted rear cast molding, obtain copper lug；
C, optimization process: semi-finished product step A obtained sequentially pass through Homogenization Treatments, batch (-type) Annealing, Ageing Treatment, obtain aluminium alloy connecting tube, copper-aluminium transition part, and concrete operations are as follows:
1., the optimization of aluminium alloy connecting tube semi-finished product processes: be placed in by aluminium alloy connecting tube semi-finished product At a temperature of 430-560 DEG C, Homogenization Treatments 5-18h；Then the aluminium alloy after Homogenization Treatments is connected Pipe semi-finished product carry out intermittent annealing, at a temperature of 260-370 DEG C, lower the temperature after insulation 1-6h, Temperature is incubated 1-5h, cooling after being down to 130-170 DEG C；Then will close through the aluminum of intermittence annealing Gold connecting tube semi-finished product carry out Ageing Treatment in the uniform electric field that electric field intensity is 5-15KV/cm, control The temperature of Ageing Treatment processed is 250-310 DEG C, and the time of Ageing Treatment is 8-24h；
2., the optimization of copper-aluminium transition part semi-finished product processes: copper-aluminium transition part semi-finished product are placed in 480- At a temperature of 520 DEG C, Homogenization Treatments 10-20h；Then by the copper-aluminium transition part after Homogenization Treatments Semi-finished product carry out intermittent annealing, at a temperature of 280-360 DEG C, lower the temperature after insulation 2-5h, temperature Degree is incubated 2-3h, cooling after being down to 170-208 DEG C；Then by the copper aluminum mistake through intermittence annealing Cross part semi-finished product and carry out Ageing Treatment, during control in the uniform electric field that electric field intensity is 5-15KV/cm The temperature that effect processes is 230-290 DEG C, and the time of Ageing Treatment is 9-16h.
D, the preparation of copper-aluminum transition terminal: use friction-welding technique by aluminium alloy connecting tube, copper aluminum mistake Cross part, the integrally welded structure of copper lug, obtain copper-aluminum transition terminal.
In step C, optimization processes concrete operations and includes:
1., the optimization of aluminium alloy connecting tube semi-finished product processes: be placed in by aluminium alloy connecting tube semi-finished product At a temperature of 440-550 DEG C, Homogenization Treatments 5.5-17.5h；Then by the aluminium alloy after Homogenization Treatments even Adapter semi-finished product carry out intermittent annealing, at a temperature of 265-365 DEG C, drop after insulation 1.5-5.5h Temperature, temperature is incubated 1.5-4.8h, cooling after being down to 135-165 DEG C；Then will be annealing treatment through intermittence The aluminium alloy connecting tube semi-finished product of reason carry out timeliness in the uniform electric field that electric field intensity is 6-12KV/cm Processing, the temperature controlling Ageing Treatment is 255-305 DEG C, and the time of Ageing Treatment is 8.5-23.5h；
2., the optimization of copper-aluminium transition part semi-finished product processes: copper-aluminium transition part semi-finished product are placed in 485- At a temperature of 518 DEG C, Homogenization Treatments 10.5-19h；Then by the copper-aluminium transition after Homogenization Treatments Part semi-finished product carry out intermittent annealing, at a temperature of 290-350 DEG C, lower the temperature after insulation 2.5-4.5h, Temperature is incubated 2.1-2.8h, cooling after being down to 173-205 DEG C；Then by through intermittence annealing Copper-aluminium transition part semi-finished product carry out Ageing Treatment in the uniform electric field that electric field intensity is 6-13KV/cm, The temperature controlling Ageing Treatment is 240-280 DEG C, and the time of Ageing Treatment is 10-15h.
The invention has the beneficial effects as follows: the present invention devises copper-aluminium transition part on copper-aluminum transition terminal, When being transitioned into copper lug by aluminium alloy connecting tube, owing to being additionally arranged copper-aluminium transition part so that aluminium alloy Transition between connecting tube and copper lug is more steady, and creep resistance strengthens, and electric power output is more stable, with Time setting up due to copper-aluminium transition part, improve conveyance capacity, eliminate copper-aluminium transition during transmission of electricity The bottle neck effect of district's transmission, solves the structural issue that copper-aluminium transition part exists, improves connection Reliability, reduce transmission resistance, reduce heating loss, extend electric power facility life-span.The present invention Copper-aluminum transition terminal resistance damage minimum, electric extremely low, electric property, mechanical performance, mechanical property and Corrosion resistance is splendid, and the copper-aluminum transition terminal of the present invention is the most flexible, There is adaptability widely.
Simply, easily operate, the copper-aluminum transition terminal yield rate of preparation is high, steady for the preparation method of the present invention Qualitative good, reliable in quality.It is critical only that aluminium alloy connecting tube semi-finished product and copper aluminum of this preparation method The optimization of transition piece semi-finished product processes, and is processed dendrite when solving aluminium alloy casting solidification by optimization Segregation situation, eliminates in crystal boundary and intracrystalline each constituent element phenomenon pockety.At homogenization Reason promotes eutectic phase in alloy and dissolves, and makes alloy composition distribution tend to uniform, and tissue reaches meeting Close to poised state, improve shape and the distribution of become phase in alloy, put forward heavy alloyed plasticity, and carry The high alloy element (other elements in addition to aluminum) solid solubility in matrix (aluminum) thus improve conjunction The intensity of gold, finally improves processing characteristics and the final utilization performance of alloy；In the present invention at homogenization The time of reason and temperature are that invention heat obtains, in this homogenization through long-term creative research summary In the case of process time and temperature, it is achieved that the diffusion of alloying element, dendritic segregation eliminates, from crystalline substance Tending to be steady to the distribution of intracrystalline in boundary, the residual on crystal boundary is dissolved mutually the most substantially.Annealed by batch (-type) Process, reduce resistance of deformation, it is to avoid overheated, burn-off phenomenon, improve the corrosion resistance of aluminium alloy Can, prevent the generation of lamellar tissue, weaken the anisotropic between composition, improve aluminium alloy further Intensity and plasticity, eliminate the internal stress produced in mechanical processing process and the damage to microstructure, Optimize crystal structure, recover wire rod electrical property, optimize mechanical performance, make material tensile property, Flexility and anti-fatigue performance keep preferably coupling；Due to aluminium alloy connecting tube semi-finished product and copper aluminum Containing Mn, Ti element in transition piece semi-finished product, make annealing treatment through batch (-type), be given in the present invention Under annealing conditions, form Al6Mn、Al3Ti intermetallic compound, they can stablize dislocation, sub boundary Deng substructure, shearing stress dislocation movement by slip needed for is greatly improved, hinders dislocation motion, be conducive to real Existing high-temperature particles, can promote that in ag(e)ing process, the second phase is evenly distributed, for albronze terminal Application process can provide safeguard by Stabilization under variations in temperature.Again by the aluminium alloy after annealing In uniform electric field, carry out Ageing Treatment, the performance of whole material can be made to reach equal by Ageing Treatment Even distribution, property indices reaches all good coupling；Due to the existence of copper, in Ageing Treatment During, solution strengthening effect and the dispersion-strengthened action of the θ phase that copper is formed can be strengthened with aluminum, Improve hot strength and the yield strength of aluminium alloy, further improve the mechanical performance of aluminium alloy.
In aluminium alloy connecting tube of the present invention and copper-aluminium transition part, the performance evaluation of each alloying element is as follows:
The present invention, with aluminum as base, with the addition of the ferrum of trace, and aluminum can form Al with ferrum3Fe, the Al of precipitation3Fe Dispersed granules inhibits the deformation of creep of alloy, and part Fe also forms the analysis of AlFeRE compound with RE Going out, precipitated phase AlFeRE can strengthen the anti-fatigue performance of alloy and the heat resistance of hot operation, and dilute Earth compounds precipitated phase can also improve yield limit intensity；The copper added and aluminum formation θ phase, and θ Play solution strengthening and dispersion-strengthened action mutually, improve hot strength and the yield strength of aluminium alloy；Dilute Earth elements as surface active element, can integrated distribution on crystal boundary, reduce pulling force between phase and phase, So that crystal grain refinement.Silicon can improve tensile strength, and silicon can also form Mg-Si metallic compound with magnesium, Improve the hot property of aluminium alloy.Manganese and aluminum effect obtain MnAl4With aluminum, there is identical current potential, Ke Yiyou Effect ground improves corrosion resistance and the weldability of alloy；Manganese is as High-Temperature Strengthening phase simultaneously, has raising again Crystallization temperature, the effect of suppression recrystallization roughening, it is possible to realize the solution strengthening to alloy, supplement by force Change and improve heat resistance.Tantalum can form Al in the melt7Ta9、Al7Ta5、Al3Ta4、Al2Ta3、 AlTa2Etc. High-Temperature Strengthening metallic compound, there is High-Temperature Strengthening effect, improve the high-temerature creep of aluminium alloy Performance, forms High-Temperature Strengthening phase with magnesium, has raising recrystallization temperature, the work of suppression recrystallization roughening With, it is possible to realize the solution strengthening to alloy, supplement strengthening and improve heat resistance.Beryllium is in the alloy Form α, β dispersivity High-Temperature Strengthening phase, the oxidation of alloying element, scaling loss and air-breathing can be prevented, improve The quality of alloy and the consistency of surface film oxide.Beryllium can also make impurity iron be become pellet shape from needle-like, When can prevent from casting, sand-cast recoils with model, owing to beryllium has high affinity to oxygen and nitrogen, so It is efficient when melt deaerates such that it is able to realize surface smoothness good, and intensity is high, Yi Jiyan Malleability obtains improving part.On the other hand, adding beryllium in alloy can make between the ferrous metal of fragility crystal by greatly Needle-like shape and stratiform shape be transformed into little equiaxed crystal, improve intensity and the ductility of alloy, and energy Enough allow that aluminium alloy has higher iron content.Beryllium can improve the mobility of aluminium alloy, makes the stream of melt Dynamic property increases, and can improve tensile strength and yield limit in aluminium alloy.Height it is added with in aluminium alloy Active element cobalt, cobalt generates AlCo, Al with reactive aluminum3Co2、AlCo2Strong etc. multiple dispersivity high temperature Change phase；Cobalt and ferrum form Al in interdendritic when coexisting4(CoFe) etc. complicated hardening constituent, hinder dislocation, Stop grain sliding, be effectively increased the resisting fatigue under Alloy At Room Temperature and high temperature and creep-resistant property, from And improve the thermostability of aluminium alloy, simultaneously in the presence of Sc, the interaction of Al-Co-Sc part, solid When solution decomposes, separating out substantial amounts of phase coherence particle, these coherence particles stop by the dislocation network of two dimension The sub boundary of network composition migrates and merges, thus alloy causes strong substructure invigoration effect. Sc with Al forms coherence and joins, and beneficially Crystal Rotation to consistent orientation thus forms texture, makes aluminum close While the intensity of gold connecting tube and copper-aluminium transition part increases substantially, electric conductivity is basically unchanged.Rare earth unit Element as surface active element, can integrated distribution on crystal boundary, reduce pulling force between phase and phase, from And make crystal grain refine.Boron adds in aluminum base, moreover it is possible to improves intensity and the extension property of aluminium alloy, and makes Obtain alloy and there is preferable fatigue resistance.B can form complex compound with Al, puies forward heavy alloyed heat Performance.The present invention is by comprehensive to selection and the control of content, beneficially aluminium alloy of alloying element The raising of energy, thus ensure that cable conductor is to aluminium alloy connecting tube and the smooth transition of copper-aluminium transition part.
By controlling the usage ratio of Sc-Ti-Mn-RE in the present invention, add it in aluminium alloy, energy Enough notable crystal grain thinnings, suppression recrystallization, make the stability of polygonization tissue rise, and enable aluminum alloy to Intracrystalline and grain boundary precipitate are more tiny, uniform, are conducive to the difference in Electrode Potential reducing crystal boundary with intracrystalline, Make corrosion uniform, reduce grain boundary corrosion tendency, thus improve the decay resistance of copper-aluminum transition terminal, While keeping aluminium alloy good electric conductivity, significantly improve the intensity corrosion stability of copper-aluminum transition terminal Energy and welding performance.
The present invention exists while Ti-Mn-Sc-B, the notable crystal grain thinning of energy, form tiny disperse Precipitated phase, owing to there is substantial amounts of this disperse phase in alloy, crystal grain is grown up the most hindered, suppression Recrystallization, thus recrystallization temperature can be significantly improved, extend recrystallization stage of incubation, reduce recrystallization speed Degree, significantly improves its intensity etch resistant properties and welding performance while keeping aluminium alloy good electric conductivity.
In aluminum base, with the addition of Fe, Mg, Co element, weld crack tendentiousness can be significantly reduced, in conjunction with Sc-Ti-Mn-RE can effectively suppress the recrystallization of heat affected area, the subgrain tissue of matrix transit directly to The as cast condition district of weld seam, makes the weld seam transition region should with recrystallized structure or heat affected area not have again Crystalline structure, adds after Fe, Mg, Co element in aluminium alloy, separate out in the base the most tiny, Dispersed precipitate and the particle of matrix coherence, coherent particle has higher heat stability, at alloy Heat affected area yet suffers from, and heat affected area is the weak part of welding point, therefore Fe, Mg, Co can significantly reduce the thermal crack(ing sensitivity of aluminium alloy, improves solderability and the weld seam of copper-aluminum transition terminal Intensity and its anti-stress corrosiveness.
Adding copper, manganese, cobalt, nickel in aluminum base, the diffusion substantially increased between copper aluminum is dissolved each other, and has The brittlement phase formed between effect prevention copper aluminum, metallurgical binding when enabling aluminum alloy to weld with copper end-face friction, Thus improve the combination property of copper-aluminum transition terminal.In aluminum base, it is simultaneously introduced Be, Mn, can significantly carry The corrosion resistance of high-aluminium alloy, improves the combination property of copper-aluminum transition terminal further.
Ag, Bi, Sb, Pb, Hf, Sn is also added in the chemical composition of copper-aluminium transition part, these In the case of the addition of element makes copper-aluminium transition part roughly the same with aluminium alloy connecting tube composition, close The composition of copper, it is ensured that electric current from aluminium alloy connecting tube to the smooth transition of copper lug, in copper-aluminium transition part Nickel and copper can unlimited solid solution, aluminium alloy adds nickel, the Cu of terminal copperhead expands to the Ni of aluminum portions Dissipating and dissolve each other, the Cu diffusion in copperhead side of the Ni contained by aluminum portions simultaneously is dissolved each other, the most effectively Stop and between aluminum bronze, form brittlement phase, substantially increase aluminum bronze and dissolve each other, enable aluminum alloy to rubbing with copper end face Metallurgical binding when wiping weldering, thus improve the combination property of joint, aluminium alloy adds appropriate nickel, One layer of certain thickness fine and close corrosion protection film can also be formed on aluminum surface, slow down its corrosion of outer bound pair, Increase its corrosion resistance further.The heat conduction of silver, electric conductivity very well, and are rich in ductility, Add it in alloy, be remarkably improved the electric conductivity of alloy；Bismuth is stable metal, at air In stable；Antimony air at room temperature is stable, but three oxygen can be generated with oxygen reaction during heating Change two antimony, prevent from forming battery effect, it is to avoid alloy surface produces electrification corrosion, prevents copper, aluminum The contact resistance of transition junction increases heating oxidation, even ruptures, is further ensured that copper-aluminium transition end The son stability when variations in temperature, Sb-Cd exists simultaneously, can prevent electrified corrosion, Cd further Existence the performance of Sb effect is had facilitation；Lead is to have strong ductility, can carry heavy alloyed Ductility, Pd-Cd exists simultaneously, has the effect of Synergistic, further increases the extension of alloy Property；Hafnium forms tiny dispersion-strengtherning phase in the alloy, and reach a high temperature invigoration effect, improves alloy and exists Heat stability under hot operation.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment 1.
Fig. 2 is that the A-A of Fig. 1 is to sectional view
Fig. 3 is the structural representation of embodiment 2.
Fig. 4 is that the A-A of Fig. 3 is to sectional view.
Fig. 5 is the structural representation of embodiment 3.
Fig. 6 is that the A-A of Fig. 5 is to sectional view.
In accompanying drawing, 1 represents aluminium alloy connecting tube, and 2 represent copper lug, and 3 represent copper-aluminium transition part, and 4 Representing base plate, 5 represent connection post.
Detailed description of the invention
The present invention mainly carries out inventive improvements from the following aspect to copper-aluminum transition terminal: 1, improve environment Pollute (electrochemical effect), thus improve the life-span of copper-aluminum transition terminal, the contact of two kinds of metals of copper aluminum It is easily formed electrolyte under face and the effect of moisture, carbon dioxide and other impurity in air, produces electricity Pond effect, produces couple corrosion, causes the resistance increase heating oxidation of copper, aluminum transition junction, very To fracture；2, the raising of binding site current carrying capacity, it is ensured that the stability of work；3, processing The improvement of technique, it is ensured that the quality of copper-aluminum transition terminal；4, the change (copper of copper-aluminum transition terminal structure The design of aluminum transition piece), improve structural strength, it is to avoid the generation of fracture damage phenomenon below in conjunction with The present invention is further illustrated for specific embodiment.
Embodiment 1
As shown in Figure 1-2, Al-Fe-B-RE aluminium alloy cable copper-aluminum transition terminal, including with cable conductor The copper lug 2 that the aluminium alloy connecting tube 1 connected is connected with aluminium alloy connecting tube 1 other end, described aluminum closes Gold connecting tube 1 is stifled oil type structure, built-in conducting paste, and aluminium alloy connecting tube 1 is provided with interconnecting hole, Cable conductor inserts in interconnecting hole, described interconnecting hole cross sectional shape be circle, sector, shoe, Semicircle or corresponding with cross-section of cable shape, described copper lug 2 is L-type, including with chopper The base plate 4 connected and the connection post 5 being connected with base plate 4, connect the other end of post 5 with copper-aluminium transition part 3 even Connecing, connect post 5 and design in 100-120 ° of angle with base plate 4, this design is owing to copper-aluminum transition terminal leads to Crossing the impact of the environmental factors such as long wire pull strength and nature, solder side will bear in bending Power, in order to improve bearing capacity further, it is to avoid copper-aluminium transition district weld seam causes disconnected because of external force pressure Split, between aluminium alloy connecting tube 1 and copper lug 2, be provided with copper-aluminium transition part 3, described copper-aluminium transition part 3 is the aluminium alloy of column solid construction, and the diameter of copper-aluminium transition part is less than the diameter of aluminium alloy connecting tube.
Described copper-aluminium transition part comprises by weight percentage: Si 0.08%, Fe 0.07%, Cu 0.15%, Mg 0.08%, B 0.5%, Mn 0.1%, Ti 0.18%, Co 0.1%, Ta 0.03%, Ni 0.15%, Sc 0.028%, RE0.1%, Ag 0.01%, Bi 0.0005%, Sb 0.01%, Hf 0.001%, Pb 0.001%, Cd0.001%, Sn0.001%, Be0.001%, surplus are aluminum.
The material composition of aluminium alloy connecting tube is identical with the material composition of the cable conductor connected.
The material of described copper lug is T2 fine copper.
The copper-aluminum transition terminal of above-described embodiment carries out 1000 thermal cycle tests, terminals lead with cable The tensile test of body, resistance to compression croop property test in 100 hours, performance is far above after testing The standard of GB/T9327-2008 and IEC61238-1:2003, concrete detection parameter is as follows:
Aluminium alloy connecting tube: IACS is identical with aluminum alloy cable conductor.
Copper-aluminium transition part: conductivity >=65%IACS, higher than aluminum alloy cable conductor, elongation at break >=30%, tensile strength >=130MPa, longtime running heat resisting temperature >=230 DEG C, heat resistant test intensity is residual Depositing rate >=93%, 400h decay resistance mass loss is less than 0.25g/m2Hr, 20 DEG C of resistivity (Ω ·mm2/ m): meansigma methods≤0.027356.
Embodiment 2
As shown in Figure 3-4, Al-Fe-B-RE aluminium alloy cable copper-aluminum transition terminal, lead including with cable The copper lug 2 that the aluminium alloy connecting tube 1 that body connects is connected with aluminium alloy connecting tube 1 other end, described Aluminium alloy connecting tube 1 is stifled oil type structure, and built-in conducting paste, in aluminium alloy connecting tube 1 is provided with Connecting hole, cable conductor inserts in interconnecting hole, and described interconnecting hole cross sectional shape is circular, fan Shape, shoe, semicircle or the shape corresponding with the cross-section of cable, described copper lug 2 is L-type, Including the base plate 4 being connected with chopper and the connection post 5 being connected with base plate 4, connect the other end of post 5 Being connected with copper-aluminium transition part 3, connect post 5 and design in 90 ° of angles with base plate 4, this design angle is too Little, it is unfavorable for the fixing of wiring nose 1, angle is too big, and junction contact area is little, is easily broken off, In order to improve bearing capacity further, it is to avoid copper-aluminium transition district weld seam causes fracture because of external force pressure, Copper-aluminium transition part 3, described copper-aluminium transition part 3 it is provided with between aluminium alloy connecting tube 1 and copper lug 2 For the aluminium alloy of column solid construction, the diameter of copper-aluminium transition part is less than the diameter of aluminium alloy connecting tube, Connect the diameter diameter more than copper-aluminium transition part 3 of post 5.The material of described copper lug is T2 fine copper.
Described copper-aluminium transition part comprises by weight percentage: Si 0.085%, Fe 0.075%, Cu 0.19%, Mg 0.095%, B 0.75%, Mn 0.13%, Ti 0.22%, Co 0.18%, Ta 0.04%, Ni 0.27%, Sc 0.029%, RE0.6%, Ag 0.03%, Bi 0.0006%, Sb 0.021%, Hf 0.001%, Pb 0.001%, Cd0.002%, Sn0.002%, Be0.003%, surplus are aluminum.
Described aluminium alloy connecting tube comprises by weight percentage: Si 0.08%, Fe 0.05%, Cu 0.05%, Mg 0.05%, B 0.05%, Mn 0.07%, Ti 0.15%, Co 0.06%, Ta 0.05%, Ni 0.05%, Sc 0.025%, RE0.1%, Be0.001%, surplus are aluminum.
The copper-aluminum transition terminal of above-described embodiment carries out 1000 thermal cycle tests, terminals lead with cable The tensile test of body, resistance to compression croop property test in 100 hours, performance is far above after testing The standard of GB/T9327-2008 and IEC61238-1:2003, concrete detection parameter is as follows:
Aluminium alloy connecting tube: conductivity >=65%IACS, higher than aluminum alloy cable conductor, extension at break Rate >=30%, tensile strength >=120MPa, longtime running heat resisting temperature >=230 DEG C, heat resistant test intensity Survival rate >=93%, 400h decay resistance mass loss is less than 0.3g/m2Hr, 20 DEG C of resistivity (Ω ·mm2/ m): meansigma methods≤0.027356.
Copper-aluminium transition part: conductivity >=67%IACS, higher than aluminum alloy cable conductor, elongation at break >=30%, tensile strength >=150MPa, longtime running heat resisting temperature >=230 DEG C, heat resistant test intensity is residual Depositing rate >=95%, 400h decay resistance mass loss is less than 0.23g/m2Hr, 20 DEG C of resistivity (Ω ·mm2/ m): meansigma methods≤0.026356.
Embodiment 3
As seen in figs. 5-6, Al-Fe-B-RE aluminium alloy cable copper-aluminum transition terminal, lead including with cable The copper lug 2 that the aluminium alloy connecting tube 1 that body connects is connected with aluminium alloy connecting tube 1 other end, described Aluminium alloy connecting tube 1 is stifled oil type structure, and built-in conducting paste, in aluminium alloy connecting tube 1 is provided with Connecting hole, cable conductor inserts in interconnecting hole, and described interconnecting hole cross sectional shape is circular, fan Shape, shoe, semicircle or the shape corresponding with the cross-section of cable, described copper lug 2 is L-type, Including the base plate 4 being connected with chopper and the connection post 5 being connected with base plate 4, connect the other end of post 5 Being connected with copper-aluminium transition part 3, connect post 5 and design in 90 ° of angles with base plate 4, this design angle is too Little, it is unfavorable for the fixing of wiring nose 1, angle is too big, and junction contact area is little, is easily broken off, In order to improve bearing capacity further, it is to avoid copper-aluminium transition district weld seam causes fracture because of external force pressure, Copper-aluminium transition part 3, described copper-aluminium transition part 3 it is provided with between aluminium alloy connecting tube 1 and copper lug 2 For the aluminium alloy of column solid construction, the diameter of copper-aluminium transition part is less than the diameter of aluminium alloy connecting tube, Connect the diameter diameter equal to copper-aluminium transition part 3 of post 5.The material of described copper lug is T2 fine copper.
Described copper-aluminium transition part comprises by weight percentage: Si 0.1%, Fe 0.33%, Cu 0.23%, Mg 0.12%, B 0.87%, Mn 0.15%, Ti 0.27%, Co 0.2%, Ta 0.05%, Ni 0.38%, Sc 0.03%, RE0.6%, Ag 0.05%, Bi 0.0008%, Sb 0.035%, Hf 0.0015%, Pb 0.0015%, Cd0.003%, Sn0.003%, Be0.003%, surplus are aluminum.
Described aluminium alloy connecting tube comprises by weight percentage: Si0.13%, Fe 1.3%, Cu 0.13%, Mg 0.2%, B 0.27%, Mn 0.18%, Ti 0.26%, Co 0.12%, Ta 0.09%, Ni 0.28%, Sc 0.033%, RE0.6%, Be0.003%, surplus are aluminum.
The copper-aluminum transition terminal of above-described embodiment carries out 1000 thermal cycle tests, terminals lead with cable The tensile test of body, resistance to compression croop property test in 100 hours, performance is far above after testing The standard of GB/T9327-2008 and IEC61238-1:2003, concrete detection parameter is as follows:
Aluminium alloy connecting tube: conductivity >=64%IACS, higher than aluminum alloy cable conductor, extension at break Rate >=31%, tensile strength >=130MPa, longtime running heat resisting temperature >=250 DEG C, heat resistant test intensity Survival rate reaches 96%, and 400h decay resistance mass loss is less than 0.29g/m2Hr, 20 DEG C of resistance Rate (Ω mm2/ m): meansigma methods≤0.027556.
Copper-aluminium transition part: conductivity >=67%IACS, higher than aluminum alloy cable conductor, elongation at break >=30%, tensile strength >=150MPa, longtime running heat resisting temperature >=230 DEG C, heat resistant test intensity is residual The rate of depositing reaches 95%, and 400h decay resistance mass loss is less than 0.25g/m2Hr, 20 DEG C of resistivity (Ω·mm2/ m): meansigma methods≤0.026656.
Embodiment 4
Al-Fe-B-RE aluminium alloy cable copper-aluminum transition terminal, including the aluminium alloy being connected with cable conductor The copper lug 2 that connecting tube 1 is connected with aluminium alloy connecting tube 1 other end, described aluminium alloy connecting tube 1 is Stifled oil type structure, built-in conducting paste, aluminium alloy connecting tube 1 is provided with interconnecting hole, and cable conductor is inserted Enter in interconnecting hole, described interconnecting hole cross sectional shape be circle, sector, shoe, semicircle or The shape corresponding with the cross-section of cable, described copper lug 2 is L-type, including the end being connected with chopper Plate 4 and the connection post 5 being connected with base plate 4, the other end connecting post 5 is connected with copper-aluminium transition part 3, connects Post 5 and base plate 4 design in 100-120 ° of angle, and this is mainly designed to owing to copper-aluminum transition terminal is by long The impact of the environmental factorss such as the wire pull strength of time and nature, solder side will bear Bending Internal Force, In order to improve bearing capacity further, it is to avoid copper-aluminium transition district weld seam causes fracture because of external force pressure, Being provided with copper-aluminium transition part 3 between aluminium alloy connecting tube 1 and copper lug 2, described copper-aluminium transition part 3 is The aluminium alloy of column solid construction, the diameter of copper-aluminium transition part is less than the diameter of aluminium alloy connecting tube.
Described copper-aluminium transition part comprises by weight percentage: Si 0.09%, Fe 0.09%, Cu 0.23%, Mg 0.09%, B 0.85%, Mn 0.14%, Ti 0.26%, Co 0.18%, Ta 0.05%, Ni 0.17%, Sc 0.03%, RE0.3%, Ag 0.02%, Bi 0.0007%, Sb 0.02%, Hf 0.0014%, Pb 0.0013%, Cd0.003%, Sn0.003%, Be0.003%, surplus are aluminum.
Described aluminium alloy connecting tube comprises by weight percentage: Si 0.09%, Fe 1.3%, Cu 0.12%, Mg 0.12%, B 0.25%, Mn 0.17%, Ti 0.25%, Co 0.1%, Ta 0.09%, Ni 0.26%, Sc 0.033%, RE0.6%, Be0.003%, surplus are aluminum.
The material of described copper lug is T2 fine copper.
The copper-aluminum transition terminal of above-described embodiment carries out 1000 thermal cycle tests, terminals lead with cable The tensile test of body, resistance to compression croop property test in 100 hours, performance is far above after testing The standard of GB/T9327-2008 and IEC61238-1:2003, concrete detection parameter is as follows:
Aluminium alloy connecting tube: conductivity >=68%IACS, higher than aluminum alloy cable conductor, extension at break Rate >=30%, tensile strength >=140MPa, longtime running heat resisting temperature >=240 DEG C, heat resistant test intensity Survival rate reaches 93%, and 400h decay resistance mass loss is less than 0.28g/m2Hr, 20 DEG C of resistance Rate (Ω mm2/ m): meansigma methods≤0.027656.
Copper-aluminium transition part: conductivity >=70%IACS, higher than aluminum alloy cable conductor, elongation at break >=35%, tensile strength >=150MPa, longtime running heat resisting temperature >=270 DEG C, heat resistant test intensity is residual The rate of depositing reaches 95%, and 400h decay resistance mass loss is less than 0.23g/m2Hr, 20 DEG C of resistivity (Ω·mm2/ m): meansigma methods≤0.026456.
Embodiment 5
Al-Fe-B-RE aluminium alloy cable copper-aluminum transition terminal, including the aluminium alloy being connected with cable conductor The copper lug 2 that connecting tube 1 is connected with aluminium alloy connecting tube 1 other end, described aluminium alloy connecting tube 1 For stifled oil type structure, built-in conducting paste, aluminium alloy connecting tube 1 is provided with interconnecting hole, and cable is led Body inserts in interconnecting hole, and described interconnecting hole cross sectional shape is circle, sector, shoe, semicircle Shape or the shape corresponding with the cross-section of cable, described copper lug 2 is L-type, including with chopper even The base plate 4 connect and the connection post 5 being connected with base plate 4, connect the other end and the copper-aluminium transition part 3 of post 5 Connecting, connect post 5 and design in 90 ° of angles with base plate 4, this design angle is the least, is unfavorable for wiring Fixing of nose 1, angle is too big, and junction contact area is little, is easily broken off, in order to carry further High bearing capacity, it is to avoid copper-aluminium transition district weld seam causes fracture because of external force pressure, connects at aluminium alloy Being provided with copper-aluminium transition part 3 between pipe 1 and copper lug 2, described copper-aluminium transition part 3 is the solid knot of column The aluminium alloy of structure, the diameter of copper-aluminium transition part, less than the diameter of aluminium alloy connecting tube, connects the straight of post 5 Footpath is more than the diameter of copper-aluminium transition part 3.The material of described copper lug is T2 fine copper.
Described copper-aluminium transition part comprises by weight percentage: Si 0.085%, Fe 0.3%, Cu 0.22%, Mg 0.1%, B 0.81%, Mn 0.13%, Ti 0.25%, Co 0.17%, Ta 0.04%, Ni 0.19%, Sc 0.029%, RE0.4%, Ag 0.03%, Bi 0.0006%, Sb 0.03%, Hf 0.0013%, Pb 0.0014%, Cd0.003%, Sn0.002%, Be0.001%, surplus are aluminum.
Described aluminium alloy connecting tube comprises by weight percentage: Si 0.1%, Fe 1.2%, Cu 0.11%, Mg 0.07%, B 0.23%, Mn 0.16%, Ti 0.23%, Co 0.08%, Ta 0.08%, Ni 0.24%, Sc 0.032%, RE0.5%, Be0.002%, surplus are aluminum.
The copper-aluminum transition terminal of above-described embodiment carries out 1000 thermal cycle tests, terminals lead with cable The tensile test of body, resistance to compression croop property test in 100 hours, performance is far above after testing The standard of GB/T9327-2008 and IEC61238-1:2003, concrete detection parameter is as follows:
Aluminium alloy connecting tube: conductivity >=63%IACS, higher than aluminum alloy cable conductor, extension at break Rate >=30%, tensile strength >=120MPa, longtime running heat resisting temperature >=210 DEG C, heat resistant test intensity Survival rate reaches 93%, and 400h decay resistance mass loss is less than 0.27g/m2Hr, 20 DEG C of resistance Rate (Ω mm2/ m): meansigma methods≤0.027376.
Copper-aluminium transition part: conductivity >=67%IACS, higher than aluminum alloy cable conductor, elongation at break >=30%, tensile strength >=150MPa, longtime running heat resisting temperature >=230 DEG C, heat resistant test intensity is residual The rate of depositing reaches 95%, and 400h decay resistance mass loss is less than 0.24g/m2Hr, 20 DEG C of resistivity (Ω·mm2/ m): meansigma methods≤0.026556.
Embodiment 6
Al-Fe-B-RE aluminium alloy cable copper-aluminum transition terminal, including the aluminium alloy being connected with cable conductor The copper lug 2 that connecting tube 1 is connected with aluminium alloy connecting tube 1 other end, described aluminium alloy connecting tube 1 is Stifled oil type structure, built-in conducting paste, aluminium alloy connecting tube 1 is provided with interconnecting hole, and cable conductor is inserted Enter in interconnecting hole, described interconnecting hole cross sectional shape be circle, sector, shoe, semicircle or The shape corresponding with the cross-section of cable, described copper lug 2 is L-type, including the end being connected with chopper Plate 4 and the connection post 5 being connected with base plate 4, the other end connecting post 5 is connected with copper-aluminium transition part 3, connects Post 5 and base plate 4 design in 90 ° of angles, and this design angle is the least, are unfavorable for the fixing of wiring nose 1, Angle is too big, and junction contact area is little, is easily broken off, and in order to improve bearing capacity further, keeps away Exempt from copper-aluminium transition district weld seam and cause fracture because of external force pressure, aluminium alloy connecting tube 1 and copper lug 2 it Between be provided with copper-aluminium transition part 3, described copper-aluminium transition part 3 is the aluminium alloy of column solid construction, copper aluminum The diameter of transition piece, less than the diameter of aluminium alloy connecting tube, connects the diameter of post 5 equal to copper-aluminium transition part 3 Diameter.The material of described copper lug is T2 fine copper.
Described copper-aluminium transition part comprises by weight percentage: Si 0.095%, Fe 0.31%, Cu 0.21%, Mg 0.11%, B 0.83%, Mn 0.1%, Ti 0.24%, Co 0.16%, Ta 0.03%, Ni 0.21%, Sc 0.028%, RE0.6%, Ag 0.04%, Bi 0.0005%, Sb 0.035%, Hf 0.0015%, Pb 0.0014%, Cd0.002%, Sn0.001%, Be0.002%, surplus are aluminum.
Described aluminium alloy connecting tube comprises by weight percentage: Si 0.13%, Fe 1%, Cu 0.1%, Mg 0.19%, B 0.2%, Mn 0.15%, Ti 0.21%, Co 0.12%, Ta 0.07%, Ni 0.22%, Sc 0.031%, RE0.4%, Be0.001%, surplus are aluminum.
The copper-aluminum transition terminal of above-described embodiment carries out 1000 thermal cycle tests, terminals lead with cable The tensile test of body, resistance to compression croop property test in 100 hours, performance is far above after testing The standard of GB/T9327-2008 and IEC61238-1:2003, concrete detection parameter is as follows:
Aluminium alloy connecting tube: conductivity >=65%IACS, higher than aluminum alloy cable conductor, extension at break Rate >=30%, tensile strength >=120MPa, longtime running heat resisting temperature >=230 DEG C, heat resistant test intensity Survival rate reaches 93%, and 400h decay resistance mass loss is less than 0.27g/m2Hr, 20 DEG C of resistance Rate (Ω mm2/ m): meansigma methods≤0.027756.
Copper-aluminium transition part: conductivity >=67%IACS, higher than aluminum alloy cable conductor, elongation at break >=30%, tensile strength >=150MPa, longtime running heat resisting temperature >=230 DEG C, heat resistant test intensity is residual The rate of depositing reaches 95%, and 400h decay resistance mass loss is less than 0.25g/m2Hr, 20 DEG C of resistivity (Ω·mm2/ m): meansigma methods≤0.026566.
Embodiment 7
Al-Fe-B-RE aluminium alloy cable copper-aluminum transition terminal, including the aluminium alloy being connected with cable conductor The copper lug 2 that connecting tube 1 is connected with aluminium alloy connecting tube 1 other end, described aluminium alloy connecting tube 1 is Stifled oil type structure, built-in conducting paste, aluminium alloy connecting tube 1 is provided with interconnecting hole, and cable conductor is inserted Enter in interconnecting hole, described interconnecting hole cross sectional shape be circle, sector, shoe, semicircle or The shape corresponding with the cross-section of cable, described copper lug 2 is L-type, including the end being connected with chopper Plate 4 and the connection post 5 being connected with base plate 4, the other end connecting post 5 is connected with copper-aluminium transition part 3, connects Post 5 and base plate 4 design in 100-120 ° of angle, and this is mainly designed to owing to copper-aluminum transition terminal is by long The impact of the environmental factorss such as the wire pull strength of time and nature, solder side will bear Bending Internal Force, In order to improve bearing capacity further, it is to avoid copper-aluminium transition district weld seam causes fracture because of external force pressure, Being provided with copper-aluminium transition part 3 between aluminium alloy connecting tube 1 and copper lug 2, described copper-aluminium transition part 3 is The aluminium alloy of column solid construction, the diameter of copper-aluminium transition part is less than the diameter of aluminium alloy connecting tube.
Described copper-aluminium transition part comprises by weight percentage: Si 0.08-0.1%, Fe 0.07-0.33%, Cu 0.15-0.23%, Mg 0.08-0.12%, B 0.5-0.87%, Mn 0.1-0.15%, Ti 0.18-0.27%, Co 0.1-0.2%, Ta 0.03-0.05%, Ni 0.15-0.38%, Sc 0.028-0.03%, RE0.1-0.6%, Ag 0.01-0.05%, Bi 0.0005-0.0008%, Sb 0.01-0.035%, Hf 0.001-0.0015%, Pb 0.001-0.0015%, Cd0.001-0.003%, Sn0.001-0.003%, Be0.001-0.003%, Surplus is aluminum.
Described aluminium alloy connecting tube comprises by weight percentage: Si 0.12%, Fe 0.9%, Cu 0.09%, Mg 0.17%, B 0.18%, Mn 0.14%, Ti 0.2%, Co 0.11%, Ta 0.06%, Ni 0.2%, Sc 0.03%, RE0.3%, Be0.003%, surplus are aluminum.
The material of described copper lug is T2 fine copper.
The copper-aluminum transition terminal of above-described embodiment carries out 1000 thermal cycle tests, terminals lead with cable The tensile test of body, resistance to compression croop property test in 100 hours, performance is far above after testing The standard of GB/T9327-2008 and IEC61238-1:2003, concrete detection parameter is as follows:
Aluminium alloy connecting tube: conductivity >=65%IACS, higher than aluminum alloy cable conductor, extension at break Rate >=30%, tensile strength >=120MPa, longtime running heat resisting temperature >=230 DEG C, heat resistant test intensity Survival rate reaches 93%, and 400h decay resistance mass loss is less than 0.27g/m2Hr, 20 DEG C of resistance Rate (Ω mm2/ m): meansigma methods≤0.027356.
Copper-aluminium transition part: conductivity >=68%IACS, higher than aluminum alloy cable conductor, elongation at break >=30%, tensile strength >=150MPa, longtime running heat resisting temperature >=230 DEG C, heat resistant test intensity is residual The rate of depositing reaches 91%, and 400h decay resistance mass loss is less than 0.26g/m2Hr, 20 DEG C of resistivity (Ω·mm2/ m): meansigma methods≤0.026356.
Embodiment 8
Al-Fe-B-RE aluminium alloy cable copper-aluminum transition terminal, including the aluminium alloy being connected with cable conductor The copper lug 2 that connecting tube 1 is connected with aluminium alloy connecting tube 1 other end, described aluminium alloy connecting tube 1 For stifled oil type structure, built-in conducting paste, aluminium alloy connecting tube 1 is provided with interconnecting hole, and cable is led Body inserts in interconnecting hole, and described interconnecting hole cross sectional shape is circle, sector, shoe, semicircle Shape or the shape corresponding with the cross-section of cable, described copper lug 2 is L-type, including with chopper even The base plate 4 connect and the connection post 5 being connected with base plate 4, connect the other end and the copper-aluminium transition part 3 of post 5 Connecting, connect post 5 and design in 90 ° of angles with base plate 4, this design angle is the least, is unfavorable for wiring Fixing of nose 1, angle is too big, and junction contact area is little, is easily broken off, in order to carry further High bearing capacity, it is to avoid copper-aluminium transition district weld seam causes fracture because of external force pressure, connects at aluminium alloy Being provided with copper-aluminium transition part 3 between pipe 1 and copper lug 2, described copper-aluminium transition part 3 is the solid knot of column The aluminium alloy of structure, the diameter of copper-aluminium transition part, less than the diameter of aluminium alloy connecting tube, connects the straight of post 5 Footpath is more than the diameter of copper-aluminium transition part 3.The material of described copper lug is T2 fine copper.
Described copper-aluminium transition part comprises by weight percentage: Si 0.08%, Fe 0.27%, Cu 0.19%, Mg 0.12%, B 0.75%, Mn 0.14%, Ti 0.22%, Co 0.14%, Ta 0.05%, Ni 0.25%, Sc 0.03%, RE0.4%, Ag 0.04%, Bi 0.0008%, Sb 0.015%, Hf 0.0013%, Pb 0.0012%, Cd0.001%, Sn0.002%, Be0.002%, surplus are aluminum.
Described aluminium alloy connecting tube comprises by weight percentage: Si 0.11%, Fe 0.7%, Cu 0.07%, Mg 0.15%, B 0.16%, Mn 0.13%, Ti 0.19%, Co 0.1%, Ta 0.08%, Ni 0.17%, Sc 0.029%, RE0.5%, Be0.001%, surplus are aluminum.
The copper-aluminum transition terminal of above-described embodiment carries out 1000 thermal cycle tests, terminals lead with cable The tensile test of body, resistance to compression croop property test in 100 hours, performance is far above after testing The standard of GB/T9327-2008 and IEC61238-1:2003, concrete detection parameter is as follows:
Aluminium alloy connecting tube: conductivity >=65%IACS, higher than aluminum alloy cable conductor, extension at break Rate >=30%, tensile strength >=120MPa, longtime running heat resisting temperature >=230 DEG C, heat resistant test intensity Survival rate reaches 93%, and 400h decay resistance mass loss is less than 0.27g/m2Hr, 20 DEG C of resistance Rate (Ω mm2/ m): meansigma methods≤0.027256.
Copper-aluminium transition part: conductivity >=67%IACS, higher than aluminum alloy cable conductor, elongation at break >=30%, tensile strength >=150MPa, longtime running heat resisting temperature >=230 DEG C, heat resistant test intensity is residual The rate of depositing reaches 91%, and 400h decay resistance mass loss is less than 0.26g/m2Hr, 20 DEG C of resistivity (Ω·mm2/ m): meansigma methods≤0.026156.
Embodiment 9
Al-Fe-B-RE aluminium alloy cable copper-aluminum transition terminal, is with the difference of embodiment 3:
Described copper-aluminium transition part comprises by weight percentage: Si 0.1%, Fe 0.25%, Cu 0.18%, Mg 0.11%, B 0.8%, Mn 0.13%, Ti 0.21%, Co 0.13%, Ta 0.04%, Ni 0.3%, Sc 0.029%, RE0.3%, Ag 0.03%, Bi 0.0007%, Sb 0.03%, Hf 0.0012%, Pb 0.001%, Cd0.002%, Sn0.001%, Be0.003%, surplus are aluminum.
Described aluminium alloy connecting tube comprises by weight percentage: Si 0.1%, Fe 0.5%, Cu 0.07%, Mg 0.13%, B 0.14%, Mn 0.12%, Ti 0.18%, Co 0.09%, Ta 0.07%, Ni 0.15%, Sc 0.028%, RE0.4%, Be0.002%, surplus are aluminum.
The copper-aluminum transition terminal of above-described embodiment carries out 1000 thermal cycle tests, terminals lead with cable The tensile test of body, resistance to compression croop property test in 100 hours, performance is far above after testing The standard of GB/T9327-2008 and IEC61238-1:2003, concrete detection parameter is as follows:
Aluminium alloy connecting tube: conductivity >=64%IACS, higher than aluminum alloy cable conductor, extension at break Rate >=30%, tensile strength >=110MPa, longtime running heat resisting temperature >=230 DEG C, heat resistant test intensity Survival rate reaches 93%, and 400h decay resistance mass loss is less than 0.32g/m2Hr, 20 DEG C of resistance Rate (Ω mm2/ m): meansigma methods≤0.027856.
Copper-aluminium transition part: conductivity >=68%IACS, higher than aluminum alloy cable conductor, elongation at break >=30%, tensile strength >=130MPa, longtime running heat resisting temperature >=230 DEG C, heat resistant test intensity is residual The rate of depositing reaches 91%, and 400h decay resistance mass loss is less than 0.28g/m2Hr, 20 DEG C of resistivity (Ω·mm2/ m): meansigma methods≤0.026936.
Embodiment 10
Al-Fe-B-RE aluminium alloy cable copper-aluminum transition terminal, is with the difference of embodiment 4:
Described copper-aluminium transition part comprises by weight percentage: Si 0.09%, Fe 0.23%, Cu 0.17%, Mg 0.1%, B 0.7%, Mn 0.12%, Ti 0.2%, Co 0.12%, Ta 0.03%, Ni 0.33%, Sc 0.028%, RE0.2%, Ag 0.02%, Bi 0.0006%, Sb 0.02%, Hf 0.0011%, Pb 0.001%, Cd0.001%, Sn0.003%, Be0.002%, surplus are aluminum.
Described aluminium alloy connecting tube comprises by weight percentage: Si 0.09%, Fe 0.03%, Cu 0.06%, Mg 0.1%, B 0.12%, Mn 0.11%, Ti 0.17%, Co 0.08%, Ta 0.06%, Ni 0.13%, Sc 0.027%, RE0.3%, Be0.002%, surplus are aluminum.
The material of described copper lug is T2 fine copper.
The copper-aluminum transition terminal of above-described embodiment carries out 1000 thermal cycle tests, terminals lead with cable The tensile test of body, resistance to compression croop property test in 100 hours, performance is far above after testing The standard of GB/T9327-2008 and IEC61238-1:2003, concrete detection parameter is as follows:
Aluminium alloy connecting tube: conductivity >=65%IACS, higher than aluminum alloy cable conductor, extension at break Rate >=30%, tensile strength >=120MPa, longtime running heat resisting temperature >=230 DEG C, heat resistant test intensity Survival rate reaches 93%, and 400h decay resistance mass loss is less than 0.27g/m2Hr, 20 DEG C of resistance Rate (Ω mm2/ m): meansigma methods≤0.027536.
Copper-aluminium transition part: conductivity >=69%IACS, higher than aluminum alloy cable conductor, elongation at break >=30%, tensile strength >=150MPa, longtime running heat resisting temperature >=230 DEG C, heat resistant test intensity is residual The rate of depositing reaches 91%, and 400h decay resistance mass loss is less than 0.26g/m2Hr, 20 DEG C of resistivity (Ω·mm2/ m): meansigma methods≤0.026676.
Embodiment 11
Al-Fe-B-RE aluminium alloy cable copper-aluminum transition terminal, is with the difference of embodiment 5:
Described copper-aluminium transition part comprises by weight percentage: Si 0.08%, Fe 0.15%, Cu 0.16%, Mg 0.09%, B 0.6%, Mn 0.11%, Ti 0.19%, Co 0.11%, Ta 0.04%, Ni 0.35%, Sc 0.029%, RE0.4%, Ag 0.01%, Bi 0.0005%, Sb 0.01%, Hf 0.001%, Pb 0.0011%, Cd0.002%, Sn0.002%, Be0.001%, surplus are aluminum.
Described aluminium alloy connecting tube comprises by weight percentage: Si 0.08%, Fe 0.1%, Cu 0.05%, Mg 0.08%, B 0.1%, Mn 0.09%, Ti 0.16%, Co 0.07%, Ta 0.05%, Ni 0.1%, Sc 0.026%, RE0.2%, Be0.001%, surplus are aluminum.
The copper-aluminum transition terminal of above-described embodiment carries out 1000 thermal cycle tests, terminals lead with cable The tensile test of body, resistance to compression croop property test in 100 hours, performance is far above after testing The standard of GB/T9327-2008 and IEC61238-1:2003, concrete detection parameter is as follows:
Aluminium alloy connecting tube: conductivity >=65%IACS, higher than aluminum alloy cable conductor, extension at break Rate >=30%, tensile strength >=120MPa, longtime running heat resisting temperature >=230 DEG C, heat resistant test intensity Survival rate reaches 93%, and 400h decay resistance mass loss is less than 0.27g/m2Hr, 20 DEG C of resistance Rate (Ω mm2/ m): meansigma methods≤0.02763.
Copper-aluminium transition part: conductivity >=68%IACS, higher than aluminum alloy cable conductor, elongation at break >=30%, tensile strength >=150MPa, longtime running heat resisting temperature >=230 DEG C, heat resistant test intensity is residual The rate of depositing reaches 91%, and 400h decay resistance mass loss is less than 0.26g/m2Hr, 20 DEG C of resistivity (Ω·mm2/ m): meansigma methods≤0.026539.
The further prioritization scheme of embodiment of the present invention 1-11 is: by the material selection T1 of copper lug 2 Fine copper, selects T1 fine copper, and minimum compared to T2 fine copper resistance, electricity damages extremely low, and electric property improves, It is not susceptible to electric power fire.On service life, under identical situation, select the copper aluminum mistake of T1 fine copper Cross terminal and extend 1/4 than the service life selecting T2 fine copper, the electric property of copper-aluminum transition terminal, machine Tool performance, mechanical property and decay resistance all increase substantially.
Present invention also offers a kind of side preparing Al-Fe-B-RE aluminium alloy cable copper-aluminum transition terminal Method, comprises the following steps:
A, the casting of semi-finished product: take the material composition of aluminium alloy connecting tube, melted rear cast molding, To aluminium alloy connecting tube semi-finished product, take the material composition of copper-aluminium transition part, melted rear cast molding, To copper-aluminium transition part semi-finished product；
B, the casting of copper lug: take TI fine copper or T2 fine copper, melted rear cast molding, obtain copper nose Son；
C, optimization process: concrete operations include:
1., the optimization of aluminium alloy connecting tube semi-finished product processes: be placed in by aluminium alloy connecting tube semi-finished product At a temperature of 430-560 DEG C (preferably 480-520 DEG C, more preferably 510 DEG C), Homogenization Treatments 5-18h is (excellent Select 10-16h, more preferably 14h)；Then the aluminium alloy connecting tube semi-finished product after Homogenization Treatments are carried out Intermittent annealing, at a temperature of 260-370 DEG C (preferably 290-350 DEG C, more preferably 330 DEG C), Insulation 1-6h (preferably 2-5h, more preferably 4h) is lowered the temperature afterwards, and temperature is down to 130-170 DEG C (preferably 140-160 DEG C, more preferably 155 DEG C) it is incubated 1-5h (preferably 2-4h, more preferably 3h) afterwards, cooling； Then in electric field intensity will be through the aluminium alloy connecting tube semi-finished product of intermittence annealing Carrying out Ageing Treatment in the uniform electric field of 5-15KV/cm, the temperature controlling Ageing Treatment is 250-310 DEG C (preferably 260-300 DEG C, more preferably 280 DEG C), the time of Ageing Treatment be 8-24h (preferably 10-18h, More preferably 16h), obtain aluminium alloy connecting tube；
2., the optimization of copper-aluminium transition part semi-finished product processes: copper-aluminium transition part semi-finished product are placed in 480- At a temperature of 520 DEG C (preferably 490-518 DEG C, more preferably 513 DEG C), Homogenization Treatments 10-20h is (excellent Select 12-18h, more preferably 16h)；Then between the copper-aluminium transition part semi-finished product after Homogenization Treatments being carried out Having a rest property makes annealing treatment, at a temperature of 280-360 DEG C (preferably 310-350 DEG C, more preferably 340 DEG C), Insulation 2-5h (preferably 2.5-4h, more preferably 3h) is lowered the temperature afterwards, and temperature is down to 170-208 DEG C (preferably 180-200 DEG C, more preferably 192 DEG C) it is incubated 2-3h (preferably 2.5-2.8h, more preferably 2.6h) afterwards, cold But；Then in electric field intensity will be through the copper-aluminium transition part semi-finished product of intermittence annealing Carrying out Ageing Treatment in the uniform electric field of 5-15KV/cm, the temperature controlling Ageing Treatment is 230-290 DEG C (preferably 240-270 DEG C, more preferably 265 DEG C), the time of Ageing Treatment be 9-16h (preferably 10-15h, More preferably 13h)；Obtain copper-aluminium transition part；
D, the preparation of copper-aluminum transition terminal: use friction-welding technique by aluminium alloy connecting tube, copper aluminum mistake Cross part, the integrally welded structure of copper lug, obtain copper-aluminum transition terminal.
Aluminium alloy is carried out Homogenization Treatments, it is possible to ensure that its intensity and ductility have preferably coupling, Thus avoid the destruction of material microstructure and affect processing characteristics further.In order to ensure to be heated evenly, The organizational structure of optimized alloy, it is to avoid alloy in the course of processing due to heat up or lower the temperature in too fast causing The generation of portion's fault of construction, the programming rate that can control Homogenization Treatments is 1-7 DEG C/min.The present invention Using batch (-type) substep annealing, and progressively cooling down, this kind of processing mode can eliminate machinery The internal stress produced in the course of processing and the damage to microstructure, optimize crystal structure, recovers wire rod Electrical property, optimize mechanical performance, make the tensile property of material, flexility and anti-fatigue performance side Face keeps preferably coupling.Ageing Treatment is carried out on the basis of annealing technology, can be further Make up heat conduction inequality in annealing process, cause performance profile inside and outside material uneven or local lacks The feature fallen into.The performance of whole material can be made to reach to be uniformly distributed by Ageing Treatment, properties Aggregative indicator reaches all good coupling.Therefore making annealing treatment and Ageing Treatment, both are effectively combined, Optimization for material overall performance serves vital effect, and Neither of the two can be dispensed.The present invention In the uniform electric field of high intensity, preferably carry out Ageing Treatment, first aspect change atom arrangement, Coupling and migration, second aspect, improve the solid solution degree of alloying element, induce the uniform of T1 phase Forming core, improves the yield strength of alloy；After the sample making Homogenization Treatments carries out Ageing Treatment, analysis Going out the distribution of phase even dispersion, the mechanical property of alloy is greatly improved；The third aspect, changes tiny crystalline substance The precipitation form of soma and quantity, make to occur form, size, distribution etc. to take in material solid state phase transformation To being controlled, thus control materials microstructure, the excellent mechanical performance of final acquisition and electric property.
Comparative example 1
A kind of copper-aluminum transition terminal, including the fine aluminium connecting tube being connected with cable conductor and is connected with fine aluminium The copper lug that pipe connects, described copper lug uses T2 fine copper, and described fine aluminium connecting tube is stifled oil type structure, Built-in conducting paste, fine aluminium connecting tube is provided with interconnecting hole, and cable conductor inserts in interconnecting hole, Described interconnecting hole cross sectional shape is circle, sector, shoe, semicircle or relative with the cross-section of cable The shape answered, copper lug includes the connection post being connected with fine aluminium connecting tube, and be connected the end that post connects Plate, base plate offers bolt hole.This copper-aluminum transition terminal creep resistance is poor, in electric power transmitting procedure In easily skip a grade and fluctuate, cause short circuit and burning, easily corrode in path transition region, occur Bottle neck effect, electric property, bad mechanical property, the contact resistance at Cu and Al combination is big, causes heating Rupturing in oxidation and junction, service life is short.
The copper-aluminum transition terminal of above-described embodiment is carried out performance test, and concrete detection parameter is as follows:
Aluminium alloy connecting tube: conductivity 45%IACS is less than aluminum alloy cable conductor, elongation at break 10%, tensile strength 80MPa, longtime running heat resisting temperature 120 DEG C, heat resistant test intensity survival rate reaches To 88%, 400h decay resistance mass loss >=0.9g/m2Hr, 20 DEG C of resistivity (Ω mm2/ m): Meansigma methods 0.029635.
Comparative example 2
A kind of copper-aluminum transition terminal, including the aluminium alloy connecting tube being connected with cable conductor and and aluminium alloy The copper lug that connecting tube connects, described copper lug uses T2 fine copper, and described aluminium alloy connecting tube is stifled oil Type structure, built-in conducting paste, aluminium alloy connecting tube is provided with interconnecting hole, in cable conductor inserts In connecting hole, described interconnecting hole cross sectional shape be circle, sector, shoe, semicircle or with electricity The shape that cable cross section is corresponding, copper lug includes the connection post being connected with aluminium alloy connecting tube, and with even Connect the base plate that post connects, base plate offers bolt hole.This copper-aluminum transition terminal creep resistance is poor, Electric power transmitting procedure is easily skipped a grade and fluctuates, causes short circuit and burning, easily send out in path transition region , there is bottle neck effect, electric property, bad mechanical property, the contact resistance at Cu and Al combination in raw corrosion Greatly, causing heating oxidation and junction to rupture, service life is short.
Wherein the chemical composition of aluminium alloy connecting tube is: ferrum 0.048%；Copper 0.019%；Zirconium 0.03%； Silicon 0.04%；Yttrium 0.28%；Surplus is aluminum.
The copper-aluminum transition terminal of above-described embodiment is carried out performance test, and concrete detection parameter is as follows:
Aluminium alloy connecting tube: conductivity 55%IACS, less than aluminum alloy cable conductor, elongation at break 12%, tensile strength 90MPa, longtime running heat resisting temperature 150 DEG C, heat resistant test intensity survival rate reaches To 89%, 400h decay resistance mass loss >=0.79g/m2Hr, 20 DEG C of resistivity (Ω mm2/ m): Meansigma methods >=0.028635.
Comparative example 3
A kind of copper-aluminum transition terminal, including copper lug, the aluminium connecting tubes being connected with copper lug, described aluminum Connecting tube and cable conductor joint, aluminium connecting tubes is provided with interconnecting hole；Described interconnecting hole cross section Generally circular in shape, fan-shaped, shoe, semicircle and the shape corresponding with the cross-section of cable, described aluminum The chemical constituent mass percent of connecting tube is: Si≤0.12, Fe0.35-0.75, Cu0.15-0.25, Mg≤0.05, Zn≤0.05, B0.001-0.04, other element is single≤and 0.03, other element is total With≤0.1, Al surplus.This copper-aluminum transition terminal creep resistance is poor, easily occur in electric power transmitting procedure Skip a grade and fluctuate, causing short circuit and burning, easily corroding in path transition region, bottle neck effect occurs, Electric property, bad mechanical property, the contact resistance at Cu and Al combination is big, causes heating oxidation and combines Place's fracture, service life is short.
The copper-aluminum transition terminal of above-described embodiment is carried out performance test, and concrete detection parameter is as follows:
Aluminium alloy connecting tube: tensile strength (MPa) 60-150, elongation percentage 10%-20%, 20 DEG C of resistivity (Ω mm2/m): meansigma methods≤0.028264,61.0≤IACS≤62.8.
Comparative example 4
A kind of copper aluminum connects terminal, including aluminium-alloy pipe and copperhead, it is characterised in that described aluminium alloy Pipe comprises by weight percentage: Fe 0.79%-0.8%, Cu 0.13%-0.15%, Sc 0.0029%- 0.0068%, Ni0.1%-0.3%, Si0.061%-0.062%, Al and other inevitable impurity. This copper-aluminum transition terminal creep resistance is poor, easily skip a grade and fluctuate in electric power transmitting procedure, causes Short circuit and burning, easily corrode in path transition region, bottle neck effect, electric property, machinery occur Poor performance, the contact resistance at Cu and Al combination is big, causes heating oxidation and junction to rupture, uses the longevity Order short.
The copper-aluminum transition terminal of above-described embodiment is carried out performance test, and concrete detection parameter is as follows:
Aluminium alloy connecting tube: conductivity 58%IACS, less than aluminum alloy cable conductor, elongation at break 14%, tensile strength 100MPa, longtime running heat resisting temperature 160 DEG C, heat resistant test intensity survival rate reaches To 88%, 400h decay resistance mass loss >=0.85g/m2Hr, 20 DEG C of resistivity (Ω mm2/ m): Meansigma methods >=0.028745, IACS is less than aluminum alloy cable conductor.
The preparation method that the copper-aluminum transition terminal of the present invention is optimal is the preparation method using the present invention, this The copper-aluminium transition degree terminal of invention equally uses existing or conventional processing technique to be processed, Still higher than the performance of comparative example in performance, but compared to the preparation method of the present invention, from performance Upper the poorest.The aluminum alloy materials of the present invention is by the multiple alloying element of interpolation and uses heat treatment technics, Greatly improve the heat resistance of aluminium alloy so that aluminum alloy materials longtime running temperature at 230 DEG C, Creep is less, and tensile strength keeps the survival rate of 90%, has ensured mechanicalness under hot operation Can change less, anti-fatigue performance also obtain well raising simultaneously, so can avoid being used as to connect The loss in various degree occurred during terminal；And make the pliability of alloy suitable by heat treatment technics Good, substantially increase the ductility of aluminium alloy, elongation percentage, will not be due to pulling force effect more than 30% Loss phenomenon easily occurs.The present invention is compared with the copper-aluminum transition terminal of comparative example, at copper lug On the basis of all using T2 fine copper, improve 53% compared to comparative example 1 creep resistance, compare 10-20% is improve in comparative example's 2-4 creep resistance, thus, the copper-aluminum transition terminal of the present invention Security performance higher；40% is improve, compared to contrast compared to comparative example 1 corrosion resistance Embodiment 2-4 corrosion resistance improves 12-25%, and mechanical performance improves compared to comparative example 1 60%, improve 15-20% compared to 2-4；Electric property improves 40% compared to comparative example 1, 10-18% is improve compared to 2-4；Thermostability improves 65% compared to comparative example 1, compares 18-25% is improve in 2-4.

Claims (10)

1.Al-Fe-B-RE aluminium alloy cable copper-aluminum transition terminal, closes including the aluminum being connected with cable conductor The copper lug (2) that gold connecting tube (1) is connected with aluminium alloy connecting tube (1) other end, its feature exists In: between aluminium alloy connecting tube (1) and copper lug (2), it is provided with copper-aluminium transition part (3), institute Stating the aluminium alloy that copper-aluminium transition part (3) is column solid construction, described copper-aluminium transition part (3) is pressed Percentage by weight comprises: Si 0.08-0.1%, Fe 0.07-0.33%, Cu 0.15-0.23%, Mg 0.08-0.12%, B 0.5-0.87%, Mn 0.1-0.15%, Ti 0.18-0.27%, Co 0.1-0.2%, Ta 0.03-0.05%, Ni 0.15-0.38%, Sc 0.028-0.03%, RE0.1-0.6%, Ag 0.01-0.05%, Bi 0.0005-0.0008%, Sb 0.01-0.035%, Hf 0.001-0.0015%, Pb 0.001-0.0015%, Cd0.001-0.003%, Sn0.001-0.003%, Be0.001-0.003%, surplus are aluminum.
Al-Fe-B-RE aluminium alloy cable copper-aluminum transition terminal the most according to claim 1, its It is characterised by: described copper-aluminium transition part (3) comprises by weight percentage: Si 0.085-0.095%, Fe 0.1-0.3%, Cu 0.17-0.21%, Mg 0.09-0.11%, B 0.55-0.75%, Mn 0.12-0.14%, Ti 0.2-0.23%, Co 0.13-0.17%, Ta 0.035-0.045%, Ni 0.2-0.35%, Sc 0.0285-0.0295%, RE0.2-0.5%, Ag 0.02-0.04%, Bi 0.0006-0.0007%, Sb 0.015-0.03%, Hf 0.0012-0.0014%, Pb 0.0011-0.0013%, Cd0.0015-0.0025%, Sn0.0015-0.0025%, Be0.0015-0.0025%, surplus are aluminum.
Al-Fe-B-RE aluminium alloy cable copper-aluminum transition terminal the most according to claim 1, its It is characterised by: the diameter of described copper-aluminium transition part (3) is less than the diameter of aluminium alloy connecting tube (1).
Al-Fe-B-RE aluminium alloy cable copper-aluminum transition terminal the most according to claim 1, its It is characterised by: the material composition of aluminium alloy connecting tube (1) and the material composition of the cable conductor being connected Identical.
Al-Fe-B-RE aluminium alloy cable copper-aluminum transition terminal the most according to claim 1, its It is characterised by: described aluminium alloy connecting tube (1) comprises by weight percentage: Si 0.08-0.13%, Fe 0.05-1.3%, Cu 0.05-0.13%, Mg 0.05-0.2%, B 0.05-0.27%, Mn 0.07-0.18%, Ti 0.15-0.26%, Co 0.06-0.12%, Ta 0.05-0.09%, Ni 0.05-0.28%, Sc 0.025-0.033%, RE0.1-0.6%, Be0.001-0.003%, surplus are aluminum.
Al-Fe-B-RE aluminium alloy cable copper-aluminum transition terminal the most according to claim 1, its It is characterised by: described aluminium alloy connecting tube (1) is stifled oil type structure.
Al-Fe-B-RE aluminium alloy cable copper-aluminum transition terminal the most according to claim 1, its It is characterised by: the material of described copper lug (2) is T1 fine copper or T2 fine copper.
Al-Fe-B-RE aluminium alloy cable copper-aluminum transition terminal the most according to claim 1, its Be characterised by: described copper lug (2) is L-type, including the base plate (4) being connected with chopper and The connection post (5) being connected with base plate (4), connects the other end and the copper-aluminium transition part (3) of post (5) Connect.
9. prepare Al-Fe-B-RE aluminium alloy cable copper-aluminum transition terminal described in claim 1 for one kind Method, it is characterised in that comprise the following steps:
A, the casting of semi-finished product: take the material composition of aluminium alloy connecting tube (1), be cast into after melting Type, obtains aluminium alloy connecting tube semi-finished product, takes the material composition of copper-aluminium transition part (3), waters after melting Type casting moulding, obtains copper-aluminium transition part semi-finished product；
B, the casting of copper lug: take TI fine copper or T2 fine copper, melted rear cast molding, obtain copper nose Son；
C, optimization process: semi-finished product step A obtained sequentially pass through Homogenization Treatments, batch (-type) Annealing, Ageing Treatment, obtain aluminium alloy connecting tube, copper-aluminium transition part, and concrete operations are as follows:
1., the optimization of aluminium alloy connecting tube semi-finished product processes: be placed in by aluminium alloy connecting tube semi-finished product At a temperature of 430-560 DEG C, Homogenization Treatments 5-18h；Then the aluminium alloy after Homogenization Treatments is connected Pipe semi-finished product carry out intermittent annealing, at a temperature of 260-370 DEG C, lower the temperature after insulation 1-6h, Temperature is incubated 1-5h, cooling after being down to 130-170 DEG C；Then will close through the aluminum of intermittence annealing Gold connecting tube semi-finished product carry out Ageing Treatment in the uniform electric field that electric field intensity is 5-15KV/cm, control The temperature of Ageing Treatment processed is 250-310 DEG C, and the time of Ageing Treatment is 8-24h；
2., the optimization of copper-aluminium transition part semi-finished product processes: copper-aluminium transition part semi-finished product are placed in 480-
At a temperature of 520 DEG C, Homogenization Treatments 10-20h；Then by the copper-aluminium transition part after Homogenization Treatments Semi-finished product carry out intermittent annealing, at a temperature of 280-360 DEG C, lower the temperature after insulation 2-5h, temperature Degree is incubated 2-3h, cooling after being down to 170-208 DEG C；Then by the copper aluminum mistake through intermittence annealing Cross part semi-finished product and carry out Ageing Treatment, during control in the uniform electric field that electric field intensity is 5-15KV/cm The temperature that effect processes is 230-290 DEG C, and the time of Ageing Treatment is 9-16h.
D, the preparation of copper-aluminum transition terminal: use friction-welding technique by aluminium alloy connecting tube, copper aluminum mistake Cross part, the integrally welded structure of copper lug, obtain copper-aluminum transition terminal.
One the most according to claim 9 prepares Al-Fe-B-RE aluminium alloy cable copper-aluminium transition The method of terminal, it is characterised in that in step C, optimization processes concrete operations and includes:
1., the optimization of aluminium alloy connecting tube semi-finished product processes: be placed in by aluminium alloy connecting tube semi-finished product At a temperature of 440-550 DEG C, Homogenization Treatments 5.5-17.5h；Then by the aluminium alloy after Homogenization Treatments even Adapter semi-finished product carry out intermittent annealing, at a temperature of 265-365 DEG C, drop after insulation 1.5-5.5h Temperature, temperature is incubated 1.5-4.8h, cooling after being down to 135-165 DEG C；Then will be annealing treatment through intermittence The aluminium alloy connecting tube semi-finished product of reason carry out timeliness in the uniform electric field that electric field intensity is 6-12KV/cm Processing, the temperature controlling Ageing Treatment is 255-305 DEG C, and the time of Ageing Treatment is 8.5-23.5h；
2., the optimization of copper-aluminium transition part semi-finished product processes: copper-aluminium transition part semi-finished product are placed in 485- At a temperature of 518 DEG C, Homogenization Treatments 10.5-19h；Then by the copper-aluminium transition part after Homogenization Treatments half Finished product carries out intermittent annealing, at a temperature of 290-350 DEG C, lowers the temperature after insulation 2.5-4.5h, temperature Degree is incubated 2.1-2.8h, cooling after being down to 173-205 DEG C；Then by the copper through intermittence annealing Aluminum transition piece semi-finished product carry out Ageing Treatment in the uniform electric field that electric field intensity is 6-13KV/cm, control The temperature of Ageing Treatment processed is 240-280 DEG C, and the time of Ageing Treatment is 10-15h.
CN201610236897.7A 2016-04-15 2016-04-15 Al-Fe-B-RE aluminum alloy cable copper aluminum transition terminal and production method thereof Pending CN105896118A (en)

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CN107093808A (en) * 2017-05-08 2017-08-25 张家口新叶电缆有限公司 A kind of cable termination and preparation method thereof
CN108879141A (en) * 2018-06-26 2018-11-23 山东欣意铝合金电缆有限公司 A kind of creep resistant copper-aluminum transition terminal

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CN102760508A (en) * 2012-07-18 2012-10-31 中南大学 High-conductivity creep-resistant aluminium alloy cable conductor containing Hf and Ce and preparation method thereof
CN102978472A (en) * 2012-11-09 2013-03-20 安徽欣意电缆有限公司 Al-Fe-Bi-RE aluminum alloy, and preparation method and power cable thereof
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CN102760508A (en) * 2012-07-18 2012-10-31 中南大学 High-conductivity creep-resistant aluminium alloy cable conductor containing Hf and Ce and preparation method thereof
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Application publication date: 20160824