CN106834814A - Aluminium alloy conductor and preparation technology and application that a kind of high conductivity and heat heat resistance is anti-corrosion - Google Patents
Aluminium alloy conductor and preparation technology and application that a kind of high conductivity and heat heat resistance is anti-corrosion Download PDFInfo
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- CN106834814A CN106834814A CN201710034367.9A CN201710034367A CN106834814A CN 106834814 A CN106834814 A CN 106834814A CN 201710034367 A CN201710034367 A CN 201710034367A CN 106834814 A CN106834814 A CN 106834814A
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- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- 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
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—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
- C22F1/043—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 silicon as the next major constituent
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
- H01B1/023—Alloys based on aluminium
Abstract
The invention discloses a kind of anti-corrosion aluminium alloy conductor of high conductivity and heat heat resistance and preparation technology and application.The wire is mainly made up of Al, Er, Sc, Zr, Si and inevitable impurity element, by technique and the synergy of component, wire is had compared with coarse grain and cleaner crystal boundary, while going back a large amount of quaternary nanometer phases of disperse educt.The wire has effectively taken into account electric conductivity, heat resistance, corrosion resistance and intensity, electrical conductivity is more than or equal to 61.8%IACS, and tensile strength is more than or equal to 190MPa, and longtime running temperature may be up to 210 DEG C, the intensity survival rate of 230 DEG C/1h is more than 90%, and with excellent decay resistance.The wire is used for the power engineering construction and extending capacity reformation of coastal area high salt hygrothermal environment and industrial area acid mist environment, while improving transmission line of electricity capacity and reducing transmission of electricity line loss, can extension lead service life and replacing construction, with significant economic benefit and energy-conserving and environment-protective meaning.
Description
Technical field
The present invention relates to a kind of electric wire aluminium alloy conductor, the high-pressure frame that a kind of Large Copacity transmits electric power is specifically referred to
High conductivity and heat heat resistance Alcoa wire and its preparation technology and application that ceases to be busy road is used, belong to electrical material technical field.
Background technology
The coastal area of industry prosperity, it is in good demand to electric power, but, damp and hot two kinds in industrial pollution and coastal high salt
Under the conditions of adverse circumstances superposition, the security reliability of transmission line of electricity is challenged.By taking China southeastern coastal areas as an example, in height
Warm high humidity (more than 20 DEG C, medial humidity is more than 70% for year-round average temperature) atmospheric environment, salinity is high in air, industrial pollution
Seriously, atmospheric environment very severe residing for transmission line of electricity, wire corrodes in a short time and failure phenomenon is commonplace, only Fu Jianquan
State and Zhangzhou Area just have cause more than 50 to corrode caused power transmission conductor failure case, the wire fracture thing caused by atmospheric corrosion
Therefore happen occasionally.In order to ensure the transmission line capability of circuit, transfer efficiency and security reliability, except having higher to transmission pressure
Outside conduction needs, also there is certain heat-resisting, anti-corrosion and intensity requirement to it.Existing patent discloses a kind of high-strength special alumite and closes
Golden wire and preparation method thereof, microalloying, the aluminium of acquisition are carried out using 0.01-0.18wt.%Sc and 0.06-0.5wt.%Zr
The tensile strength of alloy lead wire reaches 211MPa, and the intensity survival rate of 230 DEG C/1h reaches 97%, the intensity remaining of 400 DEG C/1h
Rate reaches 95%, but its electrical conductivity only has 60%IACS, and is not directed to corrosion resistance.It is another to there is patent to disclose a kind of alumite conjunction
Golden conductor material and preparation method thereof, using Zr, Er, Fe combined microalloying, disclosed electrical conductivity is between 59.5~60.5%
Between IACS, long-term heat resisting temperature only has 180 DEG C, tensile strength not higher than 160MPa, and do not refer to corrosion resistance.It is also special
Profit discloses a kind of high-strength highly-conductive heat-resisting aluminium alloy wire rod and preparation method, using Al, La, Ce, Sc, Fe, Si microalloying, its
The tensile strength of conductor material reaches more than 255MPa, but electrical conductivity is only 60.0%IACS, and long-term heat resisting temperature is only 180
DEG C, also without being related to corrosion resistance.
The content of the invention
The present invention provide it is a kind of it is high lead, heat-resisting, anti-corrosion aluminium alloy conductor component proportion and its preparation technology, it is prepared
The electrical conductivity of wire is more than or equal to 61.8%IACS, and the intensity survival rate of 230 DEG C/1h is more than 90%, and longtime running temperature is up to
210 DEG C, tensile strength is more than or equal to 190MPa.
The aluminium alloy conductor that a kind of high conductivity and heat heat resistance of the present invention is anti-corrosion, including following components, constitute by mass percentage：
0.05~0.30wt.% of Er
0.10~0.20wt.% of Sc,
0.05~0.15wt.% of Zr,
0.05~0.10wt.% of Si,
The content summation that inevitable impurity F e contents are less than the impurity such as 0.03wt.%, Ti, V, Cr, Mn is less than
0.01wt.%, Al are surplus.
The aluminium alloy conductor that a kind of high conductivity and heat heat resistance of the present invention is anti-corrosion, the wire has the nanoprecipitation of core-duplex shell structure
Phase Al3(Er,Sc,Zr)。
The aluminium alloy conductor that a kind of high conductivity and heat heat resistance of the present invention is anti-corrosion, the mass percent of Zr is 0.05-0.15%, for example
0.06%th, 0.07%, 0.08%, 0.09%, 0.10%, 0.11%, 0.12%, 0.13%, 0.14% etc..
The aluminium alloy conductor that a kind of high conductivity and heat heat resistance of the present invention is anti-corrosion, the mass percent of Er is：0.05-0.3%, for example
0.07%th, 0.09%, 0.11%, 0.13%, 0.15%, 0.17%, 0.19%, 0.21%, 0.23%, 0.25%, 0.27%,
0.29% etc..
The aluminium alloy conductor that a kind of high conductivity and heat heat resistance of the present invention is anti-corrosion, the mass percent of Sc is：0.1-0.2%, for example
0.11%th, 0.12%, 0.13%, 0.14%, 0.15%, 0.16%, 0.17%, 0.18%, 0.19% etc..
The aluminium alloy conductor that a kind of high conductivity and heat heat resistance of the present invention is anti-corrosion, the mass percent of Si is：0.05-0.10%, for example
0.06%th, 0.07%, 0.08%, 0.09% etc..
Preferably, the anti-corrosion aluminium alloy conductor of a kind of high conductivity and heat heat resistance of the invention, the wire is with mass percent
Meter includes following components：
0.10%~0.13wt.% of Er,
0.12%~0.18wt.% of Sc,
0.05%~0.10wt.% of Zr,
0.05%~0.07wt.% of Si,
The content summation that inevitable impurity F e contents are less than the impurity such as 0.03wt.%, Ti, V, Cr, Mn is less than
0.01wt.%, Al are surplus.
Preparation technology of the invention, is matched by the material component of design, and industry of the purity more than 99.7% is chosen respectively
The intermediate alloy of fine aluminium ingot and Er, Sc, Zr, Si, adds intermediate alloy, 730 DEG C~750 after melting commercial-purity aluminium at 780 DEG C
DEG C insulation, after intermediate alloy is completely melt, refining, stokehold fast component analysis and composition adjustment, 720 DEG C insulation stand 15
~20 minutes, then casting, two-stage time effect, extruding, drawing obtained aluminium alloy monofilament.
The preparation technology of the aluminium alloy conductor that a kind of high conductivity and heat heat resistance of the present invention is anti-corrosion, the casting is selected from conventional cast, half
One kind in continuously casting and continuously casting；Casting obtains blank or line bar, and cooldown rate during casting is more than or equal to 20 DEG C/s.
The preparation technology of the aluminium alloy conductor that a kind of high conductivity and heat heat resistance of the present invention is anti-corrosion, described two-stage time effect is 300~330
DEG C 12~36 hours timeliness are carried out, then aging temp is improved to 400~430 DEG C carries out 24~48 hours timeliness.
The preparation technology of the aluminium alloy conductor that a kind of high conductivity and heat heat resistance of the present invention is anti-corrosion, the extruding includes conventional extrusion and company
Continuous extruding, between 350~500 DEG C, extrusion ratio is more than or equal to 80 to extrusion temperature, and extrusion deformation degree is more than or equal to 80%.This hair
Conventional extrusion described in bright is other extrusion processes outside Continuous Heat extruding.
The preparation technology of the aluminium alloy conductor that a kind of high conductivity and heat heat resistance of the present invention is anti-corrosion, the drawing is multi pass drawing, road
Secondary lengthening coefficient is 1.2~1.5, and the accumulation total coefficient of elongation is 5.5~10.5, the last cold drawn list for pulling into a diameter of 3~5mm
Silk.
The preparation technology of the aluminium alloy conductor that a kind of high conductivity and heat heat resistance of the present invention is anti-corrosion, the electrical conductivity of prepared wire more than etc.
In 61.8%IACS, tensile strength is more than or equal to 190MPa, and the intensity survival rate of 230 DEG C/1h is more than 90%, long-term heat resisting temperature
Up to 210 DEG C, in 3.5wt%NaCl solution, 60% yield strength is loaded, stress corrosion is not broken for 1 month.In the present invention
In, the intensity survival rate of 230 DEG C/1h be more than 90% guide line under 230 DEG C of operating mode, after 1 hour, its intensity remaining
Rate is more than 90%.
The preparation technology of the aluminium alloy conductor that a kind of high conductivity and heat heat resistance of the present invention is anti-corrosion, the electrical conductivity of prepared wire is reachable
62.1%IACS.
The preparation technology of the aluminium alloy conductor that a kind of high conductivity and heat heat resistance of the present invention is anti-corrosion, the tensile strength of prepared wire is reachable
215MPa。
Wire that is of the invention designed and preparing can be used for adverse circumstances；The adverse circumstances are industrial pollution and/or edge
Extra large high salt hygrothermal environment.
The adverse circumstances include at least one in following indexs：
Sulfur dioxide concentration is more than 8.25ug/m3, chlorine ion concentration is more than 0.95mg/m2.d, wetting time is more than 5800h/
a。
When wire that is of the invention designed and preparing is used for adverse circumstances, its service life is existing aluminium alloy conductor
1.2 times of even more highs.
Principle and advantage
For improve alloy strength and heat resistance, existing patent report Zr, Er or Zr, Sc binary are combined and are added to aluminum substrate
In, because the diffusion rate size of Er and Zr differs from 2 orders of magnitude, take the lead in the Al for separating out3Er particles are easily roughened, tri compound phase
Al3The forming core number of (Er, Zr) is reduced, and reduces reinforcing effect and thermal stability result, during the compound addition of Sc, Zr binary, Sc and
The diffusion rate size of Zr differs from 1 order of magnitude, equally exists the Al for taking the lead in separating out3The problem that Sc particles are easily roughened, but its is thick
Change speed less than the compound addition of Er, Zr binary.The present invention by appropriate Zr, Sc, Er, Si quaternary it is compound add and be aided with it is special
Two-stage time effect process, produce sufficiently induction precipitation and suppress roughening effect.The diffusion rate of Er is maximum, at 250 DEG C with regard to energy
Separate out Al3Er particles, when temperature is more than 300 DEG C, induction Sc depends on Al3Er particles are separated out, and suppress Al3The roughening of Er particles,
Form the Al of highdensity nucleocapsid structure3(Er, Sc) phase, when temperature is increased to 400 DEG C and carries out second level timeliness, the diffusion of Zr
Speed increases because temperature is improved, and depends on Al3(Er, Sc) particle is separated out, and suppresses Al3The roughening of (Er, Sc) particle, forms
Nanoprecipitation phase Al with core-duplex shell structure3(Er,Sc,Zr).In the commercial-purity aluminium that the present invention is used, Si contents are 0.03
Between~0.05wt.%, thick phase is easily formed due to Si and is enriched in grain boundaries, influence the toughness and corrosion resistance of alloy, therefore, remove
Silumin alloy and with Mg2Si is that outside 6 line aluminium alloys of hardening constituent, Si is regarded as inevitable impurity in aluminium alloy
Element, will generally take measures to remove it.The present invention is on the contrary by additionally adding appropriate Si, the part on substitution aluminium lattice
Al atoms, to increase the vacancy concentration of aluminum substrate, so as to increase the diffusion rate of alloying element especially Zr, and then suppress Al3
The roughening of (Er, Sc) particle.
In the treatment of the special two-stage time effect of high temperature is transitioned into by low temperature, diffusion rate is between Zr and Er the present invention
Sc, key player is play in induction Zr precipitations and in terms of suppressing richness Er phase roughening, and appropriate Si plays promotion alloying element and expands
Scattered effect, makes the abundant precipitation of Zr, Sc, Er of solid solution state, increases Al3The number of (Er, Sc, Zr) quaternary nanometer precipitated phase, enters
And promote the tiny precipitated phase that highly dispersed is distributed to separate out.
Compared to alloy substrate, the electrochemical potential current potential of crystal boundary is more negative, and the infusibility impurity that the element such as Fe, Si is formed is compatible
Easily in grain boundaries enrichment, crystal boundary is caused to be easier to be etched, the crystal grain of alloy is thinner, and the relative area of crystal boundary is bigger, to alloy
Corrosion resistance it is more unfavorable.In preferred scheme of the present invention, the addition of Zr is only that the addition of 0.05%~0.10%, Er is
0.10%~0.13%, be not in the Al that can turn into heterogeneous nuclei3Zr primary phases and Al3Er primary phases, can obtain size suitable
As-cast grain, the suitable as-cast grain of size can reduce the relative area of crystal boundary, so as to improve the corrosion resistance of alloy.The present invention
Si inhibits Si to be enriched with grain boundaries with the interparticle reciprocation of nanoprecipitation, crystal boundary is had degree of purity higher, to alloy
Toughness and corrosion resistance produce beneficial effect, but, excessive Si can not only damage the toughness and corrosion resistance of alloy, also can be to leading
Electric rate and heat resistance have a negative impact.Further, since precipitated phase can produce electrochemical corrosion with the potential difference of matrix,
Precipitate size is thick and skewness is then easily caused spot corrosion, and the precipitate size of alloy of the present invention is tiny, is distributed disperse,
Can further improve the corrosion resistance of alloy.
The material component proportioning (the material component proportioning after especially optimizing) of present invention design is simultaneously aided with special twin-stage
Aging technique, makes Er, Sc, Zr, Si produce collaboration and raise suppression and acts on, and promotes precipitation phase size to reduce and increasing number, produces good
Good strengthening effect and thermally-stabilised effect, meanwhile, improve the electrical conductivity of alloy because of the reduction of solid solution degree, it is relative because of crystal boundary
Area reduction, the raising of crystal boundary degree of purity, precipitated phase be tiny and Dispersed precipitate and greatly improve corrosion resistance so that wire
The collaboration of electrical conductivity, intensity, heat resistance and corrosion resistance is improved.
In a word, the present invention is by the compound addition of appropriate Zr, Sc, Er, Si and is aided with special two-stage time effect, in its component
Under the synergy of technique, unexpected excellent effect is obtained.
Brief description of the drawings
Fig. 1 (a), (b) are respectively the as-cast structure photo of embodiment two and the alloy of comparative example five.
Fig. 2 (a), (b) are respectively embodiment two and the alloy of comparative example five in the 3.5wt%NaCl solution after immersion 1 month
Surface SEM photograph.
Fig. 3 (a), (b), (c) are respectively the STEM-HAADF of embodiment two, comparative example one and the Age-prrcipitation Phase of comparative example two
Photo.
As seen from Figure 1, the crystallite dimension of embodiment two is 1~2mm, and crystal grain is thicker, and crystal boundary is totally clear, and this is
Because addition alloying element content it is relatively low, it is difficult to crystallization when formed can as the primary phase of heterogeneous nuclei so that obtain compared with
Thick crystal grain, and coarse grain is conducive to improving the corrosion resisting property and heat resistance of alloy.The crystallite dimension of comparative example five exists
200~300 μm, crystal grain is tiny, because the excessive addition of Zr, forms nascent Al in crystallization process3Zr particles are simultaneously produced
Caused by Grain Refinement Effect, additionally, part crystal boundary can be observed has second phase being continuously or intermittently distributed, it is miscellaneous through analysis
Matter phase or primary phase.
As seen from Figure 2, after one month soaks, the sample of embodiment two still keeps even curface to alloy, does not have
Obvious point corrosion pit is occurred, belongs to homogeneous corrosion, and comparative example five generates serious corrosion, it is more miscellaneous that this is that crystal boundary is present
Matter phase and crystal boundary relative area it is larger caused by.
By Fig. 3 (a) as can be seen that embodiment two has separated out the nanometer phase of a large amount of Dispersed precipitates, average diameter is left in 5nm
The right side, is Al through analysis by partial enlarged drawing as can be seen that precipitated phase has core-shell structure copolymer-shell three-decker3(Er, Sc, Zr) is precipitated
Phase.Comparative example one uses single-stage aging, and by Fig. 3 (b) as can be seen that precipitate size is in 15nm or so, size is larger and density
It is relatively low.Comparative example two only with the addition of Sc and Zr, by Fig. 3 (c) as can be seen that there was only one layer of shell, precipitate size outside core
Be 20nm or so, it is thicker than embodiment two, and separate out phase density be relatively low.Precipitate size is bigger, number is fewer, then by force
Change effect weaker, heat resistance is also corresponding lower, and precipitate volume fraction is lower, then precipitation is more insufficient, and electrical conductivity is also lower.
Specific embodiment
In embodiments of the invention and comparative example, the aluminium content of the aluminium ingot of use is more than or equal to 99.7wt.%, 780
Intermediate alloy is added after DEG C being melted, its intermediate alloy is Al-2wt.%Sc, Al-5wt.%Er, Al-5wt.%Zr, Al-
2~4 kinds in 5wt.%Si, determine that intermediate alloy adds species and addition according to component design；Treat that intermediate alloy melts completely
In 740 DEG C of insulations after change, it is sufficiently stirred for, refines, analyze and adjust by stokehold fast component, makes the mass percent of each element
Be design load, 720 DEG C insulation stand 15~20 minutes, then casting, timeliness, extrude, be drawn into monofilament.Casting technological parameter
For：Casting temperature is 720 DEG C, and cooldown rate is 30 DEG C/s；Extrusion process parameters are：Extrusion temperature is 440 DEG C, and extrusion ratio is
89.5, extrusion deformation degree is 98.5%；Extruding obtains the round aluminium bar of Φ 9.5, and the aluminium alloy single of Φ 4.0mm is drawn into through 6 passages
Silk.
Embodiment one
Smelting, refining, both analysis composition and composition adjustment, the mass percent for making each element is：Zr is
0.05%, Sc are that 0.14%, Er is that 0.10%, Si is 0.05%.After standing cast, obtain strand, strand is carried out 300 DEG C/
The two-stage time effect of 36h+400 DEG C/48h, monofilament is obtained through extruding, drawing.Performance test is carried out to monofilament, as a result as shown in table 1.
The all-round property testing result of the aluminium monofilament of 1 embodiment of table one
Embodiment two
Smelting, refining, both analysis composition and composition adjustment, the mass percent for making each element is：Zr is
0.08%, Sc are that 0.18%, Er is that 0.12%, Si is 0.06%.After standing cast, obtain strand, strand is carried out 310 DEG C/
The two-stage time effect of 24h+400 DEG C/48h, monofilament is obtained through extruding, drawing.Performance test is carried out to monofilament, as a result as shown in table 2.
The all-round property testing result of the aluminium monofilament of 2 embodiment of table two
Embodiment three
Smelting, refining, both analysis composition and composition adjustment, the mass percent for making each element is：Zr is
0.15%, Sc are that 0.10%, Er is that 0.20%, Si is 0.08%.After standing cast, obtain strand, strand is carried out 330 DEG C/
The two-stage time effect of 12h+430 DEG C/24h, monofilament is obtained through extruding, drawing.Performance test is carried out to monofilament, as a result as shown in table 3.
The all-round property testing result of the aluminium monofilament of 3 embodiment of table three
Comparative example one
Smelting, refining, both analysis composition and composition adjustment, the mass percent for making each element is：Zr is
0.08%, Sc are that 0.18%, Er is that 0.12%, Si is 0.06%.After standing cast, obtain strand, strand is carried out 400 DEG C/
The single-stage aging of 72h, monofilament is obtained through extruding, drawing.Performance test is carried out to monofilament, as a result as shown in table 4.
The all-round property testing result of the aluminium monofilament of 4 comparative example of table one
Be can be seen that by embodiment two and comparative example one：The quaternary of appropriate Zr, Sc, Er, Si is compound to add and special double
The synergy of level aging technique, improves electric conductivity, heat resistance, corrosion resistance and the intensity collaboration of gained monofilament, when component is matched somebody with somebody
When side is completely the same, do not reached then using the corresponding effect acquired by special two-stage time effect using single-stage aging technique.
Comparative example two
Smelting, refining, both analysis composition and composition adjustment, the mass percent for making each element is：Zr is
0.15%, Sc are 0.10%.Cast after standing, strand is obtained, when carrying out the twin-stage of 330 DEG C/12h+430 DEG C/24h to strand
Effect, monofilament is obtained through extruding, drawing.Performance test is carried out to monofilament, as a result as shown in table 5.
The all-round property testing result of the aluminium monofilament of 5 comparative example of table two
Comparative example two only with the addition of Zr, Sc, without addition Er, even if using with the identical two-stage time effect work of embodiment three
Skill, electrical conductivity of monofilament, intensity and heat resistance index are below embodiment three obtained by it.
Comparative example three
Smelting, refining, both analysis composition and composition adjustment, the mass percent for making each element is：Zr is
0.15%, Er are 0.20%.Cast after standing, strand is obtained, when carrying out the twin-stage of 330 DEG C/12h+430 DEG C/24h to strand
Effect, monofilament is obtained through extruding, drawing.Performance test is carried out to monofilament, as a result as shown in table 6.
The all-round property testing result of the aluminium monofilament of 6 comparative example of table three
Comparative example three only with the addition of Zr, Er, without addition Sc, even if using with the identical two-stage time effect work of embodiment three
Skill, electrical conductivity of monofilament, intensity and heat resistance index are below embodiment three obtained by it.
Comparative example four
Smelting, refining, both analysis composition and composition adjustment, the mass percent for making each element is：Zr is
0.32%, Sc are that 0.25%, Er is that 0.35%, Si is 0.08%.After standing cast, obtain strand, strand is carried out 300 DEG C/
The two-stage time effect of 36h+400 DEG C/48h, monofilament is obtained through extruding, drawing.Performance test is carried out to monofilament, as a result as shown in table 7.
The all-round property testing result of the aluminium monofilament of 7 comparative example of table four
By embodiment one and comparative example four as can be seen that when designed wire component does not limit scope in the present invention
When interior, the electric conductivity and corrosion resistance of its gained monofilament reflect the four of appropriate Zr, Sc, Er, Si of the invention significantly lower than the present invention
The compound addition of unit and the synergy of special two-stage time effect process, could make on the basis of some strength and heat resistance is ensured
Electric conductivity and corrosion resisting property are significantly improved.
Comparative example five
Smelting, refining, both analysis composition and composition adjustment, the mass percent for making each element is：Zr is
0.28%, Sc are that 0.18%, Er is that 0.12%, Si is 0.06%.After standing cast, obtain strand, strand is carried out 310 DEG C/
The two-stage time effect of 24h+400 DEG C/48h, monofilament is obtained through extruding, drawing.Performance test is carried out to monofilament, as a result as shown in table 8.
The all-round property testing result of the aluminium monofilament of 8 comparative example of table five
Be can be seen that in designed wire component by embodiment two and comparative example five, even if simply a certain constituent element
When limiting scope beyond the present invention, the electric conductivity and corrosion resistance of its gained monofilament are substantially less than the present invention, reflect this hair
The quaternary of bright appropriate Zr, Sc, Er, Si is combined the synergy of addition and special two-stage time effect process, could exist wire is ensured
On the basis of some strength and heat resistance, its electric conductivity and corrosion resisting property are significantly improved, and generate unexpected
Excellent effect.
Claims (10)
1. a kind of anti-corrosion aluminium alloy conductor of high conductivity and heat heat resistance, including following components, constitutes by mass percentage：
0.05~0.30wt.% of Er,
0.10~0.20wt.% of Sc,
0.05~0.15wt.% of Zr,
0.05~0.10wt.% of Si,
The content summation that inevitable impurity F e contents are less than the impurity such as 0.03wt.%, Ti, V, Cr, Mn is less than 0.01wt.%,
Al is surplus.
2. the anti-corrosion aluminium alloy conductor of a kind of high conductivity and heat heat resistance according to claim 1, it is characterised in that：The wire has
The nanoprecipitation phase Al of core-duplex shell structure3(Er,Sc,Zr)。
3. the anti-corrosion aluminium alloy conductor of a kind of high conductivity and heat heat resistance according to claim 2, it is characterised in that：The wire is with matter
Amount percentages include following components：
The content summation that inevitable impurity F e contents are less than the impurity such as 0.03wt.%, Ti, V, Cr, Mn is less than 0.01wt.%,
Al is surplus.
4. the technique of the anti-corrosion aluminium alloy conductor of a kind of high conductivity and heat heat resistance prepared as described in claim 1-3 any one, it is special
Levy and be：Matched by the material component of design, technical pure aluminium ingot and Er, Sc, Zr, Si of the purity more than 99.7% are chosen respectively
Intermediate alloy, intermediate alloy is added after melting commercial-purity aluminium at 780 DEG C, in 730 DEG C~750 DEG C insulations, treats that intermediate alloy is complete
After fusing, refining, stokehold fast component analysis and composition adjustment, 720 DEG C insulation stand 15~20 minutes, then casting, it is double
Level timeliness, extruding, drawing obtain aluminium alloy monofilament.
5. the preparation technology of the anti-corrosion aluminium alloy conductor of a kind of high conductivity and heat heat resistance according to claim 4, it is characterised in that：Institute
Casting is stated selected from the one kind in conventional cast, semi-continuous casting and continuously casting；Casting obtains blank or line bar, cold during casting
But speed is more than or equal to 20 DEG C/s.
6. the preparation technology of the anti-corrosion aluminium alloy conductor of a kind of high conductivity and heat heat resistance according to claim 4, it is characterised in that：Institute
Two-stage time effect is stated for 300~330 DEG C carry out 12~36 hours timeliness, and then temperature is improved to 400~430 DEG C carries out 24~48
Hour timeliness.
7. the preparation technology of the anti-corrosion aluminium alloy conductor of a kind of high conductivity and heat heat resistance according to claim 4, it is characterised in that：Institute
Stating extruding includes conventional hot extrusion and continuously extruded, and between 350~500 DEG C, extrusion ratio is more than or equal to 80 to extrusion temperature, extrudes
Deflection is more than or equal to 80%.
8. the preparation technology of the anti-corrosion aluminium alloy conductor of a kind of high conductivity and heat heat resistance according to claim 4, it is characterised in that：Institute
Drawing is stated for multi pass drawing, passage lengthening coefficient is 1.2~1.5, the accumulation total coefficient of elongation is 5.5~10.5, it is last cold drawn
Pull into the monofilament of a diameter of 3~5mm.
9. the preparation technology of the aluminium alloy conductor that a kind of high conductivity and heat heat resistance according to claim 5-8 any one is anti-corrosion, its
It is characterised by：The electrical conductivity of prepared wire is more than or equal to 61.8%IACS, and tensile strength is more than or equal to 190MPa, 230 DEG C/1h
Intensity survival rate be more than 90%, long-term heat resisting temperature is up to 210 DEG C, and in 3.5wt%NaCl solution, the surrender of loading 60% is strong
Degree, stress corrosion is not broken for 1 month.
10. a kind of application of the anti-corrosion aluminium alloy conductor of high conductivity and heat heat resistance as described in claim 1-3 any one, its feature exists
In：Including the aluminium alloy conductor is used for into adverse circumstances, the adverse circumstances include at least one in following indexs；
Sulfur dioxide concentration is more than 8.2ug/m3, chlorine ion concentration be more than 0.95mg/m2.d, wetting time is more than 5800h/a.
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