CN109215826A - A kind of high intensity aluminum conductor and preparation method thereof - Google Patents
A kind of high intensity aluminum conductor and preparation method thereof Download PDFInfo
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- CN109215826A CN109215826A CN201710530674.6A CN201710530674A CN109215826A CN 109215826 A CN109215826 A CN 109215826A CN 201710530674 A CN201710530674 A CN 201710530674A CN 109215826 A CN109215826 A CN 109215826A
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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
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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
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/0408—Light metal alloys
- C22C1/0416—Aluminium-based alloys
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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
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
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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
- C22C26/00—Alloys containing diamond or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes
- C22C2026/002—Carbon nanotubes
Abstract
A kind of high intensity aluminum conductor and preparation method thereof, by being prepared into mixed-powder for aluminium powder, Wc powder, NiAl powder, carbon nanotube ball milling dispersion mixing, then with pre-molding, sintering, hot extrusion, be drawn into Filamentous conducting wire.Has conductive effect identical with fine aluminium silk and density by aluminum conductor prepared by the formula and preparation process, and tensile strength is twice of fine aluminium, since electric conductivity is identical as fine aluminium, it can satisfy the conductive of power transmission line to require, and tensile strength doubles, the steel core of high voltage power transmission aluminum conductor can be saved, to reduce wire cost.In addition, half is decreased by almost in the wire weight for generally saving steel core since steel density is 3 times of steel, therefore, conducting wire own wt is greatly reduced, to also make transmission tower load reduction, is reduced since ice and snow weather causes shaft tower the generations of catastrophic failures such as to collapse.
Description
Technical field
The present invention relates to a kind of high-intensitive aluminum conductors and preparation method thereof, and in particular to a kind of change of high-intensitive aluminum conductor
Learn composition and preparation method.
Background technique
Aluminum conductor is commonly used for high voltage transmission line, and its advantages are that resistivity is small, and corrosion resistance is good, but its intensity is low, if
Using only aluminum conductor as high voltage transmission line, snows etc. under severe natural conditions blowing, aluminum conductor may be made to be broken, thus
There must be steel core (silk) among the aluminum conductor that common engineering uses, to improve the tensile strength of conducting wire.Since steel core corrosion resistance is poor,
Method in engineering with overstriking extends its service life, and which not only adds the weight of aluminum conductor itself, and reduce aluminum conductor
Transmission of electricity carry pressure, also increase the load of transmission tower.The aluminium alloy conductor of high intensity a kind of is developed thus to improving trnamission capacity,
Mitigate power transmission line own wt, so that reducing shaft tower load and reducing transmission line of electricity cost has larger realistic meaning.It is high in exploitation
During intensity aluminum conductor, it has been found that if Ni is added in aluminium, the elements such as W, Si, aluminum conductor intensity be can be improved, but due to
The electric conductivity of the generation of second phase, aluminium reduces, and for above situation, the invention proposes the physics such as a kind of electric conductivity, elongation percentage
Performance is close with aluminum conductor, but tensile strength is formula and the preparation side of twice of conventional aluminum conductor or more of high-intensitive aluminum conductor
Method, this aluminum conductor do not change original conducting wire transmission performance design, can save the steel core of power transmission line, reach and lower power transmission line certainly
Weight and the effect for mitigating power transmission line shaft tower load.
Summary of the invention
The object of the present invention is to provide a kind of high-intensitive aluminum conductor and preparation method thereof, by by aluminium powder, Wc powder,
NiAl powder, carbon nanotube ball milling dispersion mixing are prepared into mixed-powder, then with pre-molding, sintering, hot extrusion, be drawn into
Filamentous conducting wire.
Add the intensity that Wc improves aluminum conductor, addition carbon nanotube improves electric conductivity, with make up Wc is added in aluminium after it is conductive
Property reduce, addition NiAl powder be dispersing agent, overcome carbon nanotube and Wc disperse in aluminium powder it is bad, be easy reunion ask
Topic.With the rational proportion of several additives, the electric conductivity for having effectively achieved aluminum conductor is not reduced, and the effect that tensile strength improves
Fruit.
High-intensitive aluminum conductor raw material of the invention, the formula of use, including the component and its content included:
Carbon nanotube 0.3-0.5 wt.%；
Wc powder 0.15-0.3 wt.%；
NiAl powder 0.25-0.4 wt.%；
Al powder surplus.
Technical grade rafifinal powder is taken, 30 μm of average grain diameter or so, purity is greater than 98.5 wt.%.Wc powder purity >
99.9 wt.%, 40 μm of average grain diameter, Al content is 0.5-0.7 wt.% in NiAl powder, and 30-45 μm of average grain diameter, carbon is received
Mitron diameter 100-150 nm, 10-50 μm of length, purity > 99wt.%, specific surface area > 60m2/ g, density > 2.0g/
cm3。
It is a further object to provide a kind of preparation processes of high-intensitive aluminum conductor.
The technical solution adopted in the present invention carries out mixing to aluminium powder, Wc, NiAl and carbon nanotube first, is pressed into advance
The transmission of electricity high-strength aluminium wire for meeting power transmission line requirement is obtained after type, sintering, drawing.
The present invention sequentially includes the following steps: carries out sorting and ingredient first；The raw material weighed by said ratio is put into ball
Mixing is carried out in grinding machine, ball milling tank body is ceramic material, and abrading-ball is ZrO material, in order to prevent mechanical milling process temperature too high oxidation,
After the completion of raw material loads, a certain amount of ethyl alcohol is added in ball grinder, powder and ethyl alcohol volume ratio are 2:1, then are passed through inert gas
(such as Ar) protection, mixing revolving speed 200rpm, mixing time 2h；After the completion of mixing, mixed powder is pressed into advance in a mold
Column；It is subsequently placed into hot pressing furnace and is sintered, sintering temperature is 600-630 DEG C, and pressure is 28-32Mpa, time 1h when sintering, most
The material sintered is put into Hot Extrusion Equipment afterwards and preheats 400-430 DEG C, extrusion ratio is less than 15:1, and extruding is straight needed for pulling to
The high-intensitive aluminum conductor of diameter.
The invention has the advantages that having by aluminum conductor prepared by the formula and preparation process identical with fine aluminium silk
Conductive effect and density, and tensile strength is twice of fine aluminium, since electric conductivity is identical as fine aluminium, can satisfy power transmission line
Conduction requires, and tensile strength doubles, so that it may the steel core of high voltage power transmission aluminum conductor is saved, to reduce wire cost；
In addition, half is decreased by almost in the wire weight for generally saving steel core, therefore, significantly since steel density is 3 times of steel
Conducting wire own wt is reduced, to also make transmission tower load reduction, is reduced since ice and snow weather causes shaft tower the calamities such as to collapse
The generation of difficult sexual behavior event.
Detailed description of the invention
Fig. 1 present invention prepares the tensile strength curve comparison diagram of the product of sample and the prior art.
Specific implementation method
In conjunction with example and concrete scheme implementation, the present invention is described in detail.
The preparation method of high-intensitive aluminum conductor of the invention, by addition reinforced phase Wc and conducting wire phase carbon nanotube in aluminium
And the NiAl powder of peptizaiton is realized.Since the intensity of Wc is high, it is added in aluminium and improves the intensity of fine aluminium, but drop
Low aluminum conductor may extend away rate and electric conductivity.Addition carbon nanotube improves intensity, elongation percentage and the electric conductivity of aluminum conductor, makes up
Loss after being added due to Wc to electric conductivity and elongation percentage.The dispersion unevenness problem to add materials in order to prevent, by means of
NiAl powder and Al powder, Wc powder compatibility are good, and carbon nanotube and the good principle of Wc powder compatibility, are several powder energy
It is enough to be uniformly dispersed in mixing process.To reach elongation percentage and conductivity is close with aluminum conductor, and tensile strength is higher than commonly
Aluminum conductor.This aluminum conductor can save the steel core in existing high jewelling power transmission line, and can reduce conducting wire own wt, reduce high
Piezoelectric wire shaft tower load.
Embodiment 1
Sorting and reasonable ingredient are carried out first.Technical grade rafifinal powder is chosen, 30 μm of average grain diameter or so, purity is greater than
98.5 wt.%.Wc powder purity > 99.9 wt.%, 40 μm of average grain diameter, Al content is 0.5-0.7 in NiAl powder
Wt.%, 30-45 μm of average grain diameter, carbon nanotube diameter 100-150 nm, 10-50 μm of length, purity > 99wt.% compares table
Area > 60m2/ g, density > 2.0g/cm3。
The formula of raw material are as follows:
0.3 wt.% of carbon nanotube；
0.15 wt.% of Wc powder；
NiAl powder 0.25wt.%；
Al powder surplus.
The raw material weighed by said ratio is put into ball mill and carries out mixing, ball milling tank body is ceramic material, abrading-ball ZrO
Material, a certain amount of ethyl alcohol is added in ball grinder after the completion of raw material loads in mechanical milling process temperature too high oxidation in order to prevent,
Powder and ethyl alcohol volume ratio are 2:1, then are passed through Ar protection, mixing revolving speed 200rpm, mixing time 2h；After the completion of mixing, it will mix
Good powder is pressed into column in advance in a mold；It is subsequently placed into hot pressing furnace and is sintered, sintering temperature is 600 DEG C, and pressure is when sintering
The material sintered is finally put into Hot Extrusion Equipment and preheats 400 DEG C by 30Mpa, time 1h, and extrusion ratio is less than 15:1, squeezes
It pulls toΦUntil 3mm.
By test, the conductivity for the fine aluminium conducting wire that the present embodiment obtains is 58.06%IACX, and elongation percentage 29.85% resists
Tensile strength is 127.5Mpa, and high intensity aluminum conductor conductivity prepared by the present invention is 59.84%IACS, and elongation percentage 26.8% resists
Tensile strength is 248.5 Mpa, and therefore, high-intensitive aluminum conductor of the invention can satisfy the requirement of high-voltage line completely.
Embodiment 2
Technical grade rafifinal powder is chosen, 30 μm of average grain diameter or so, purity is greater than 98.5 wt.%.Wc powder purity >
99.9 wt.%, 40 μm of average grain diameter, Al content is 0.5-0.7 wt.% in NiAl powder, and 30-45 μm of average grain diameter, carbon is received
Mitron diameter 100-150 nm, 10-50 μm of length, purity > 99wt.%, specific surface area > 60m2/ g, density > 2.0g/
cm3。
The formula of raw material are as follows:
0.4 wt.% of carbon nanotube；
0.2 wt.% of Wc powder；
NiAl powder 0.3wt.%；
Al powder surplus.
The raw material weighed by said ratio is put into ball mill and carries out mixing, ball milling tank body is ceramic material, abrading-ball ZrO
Material, a certain amount of ethyl alcohol is added in ball grinder after the completion of raw material loads in mechanical milling process temperature too high oxidation in order to prevent,
Powder and ethyl alcohol volume ratio are 2:1, then are passed through Ar protection, mixing revolving speed 200rpm, mixing time 2h；After the completion of mixing, it will mix
Good powder is pressed into column in advance in a mold；It is subsequently placed into hot pressing furnace and is sintered, sintering temperature is 610 DEG C, and pressure is when sintering
The material sintered is finally put into Hot Extrusion Equipment and preheats 420 DEG C by 30Mpa, time 1h, and extrusion ratio is less than 15:1, squeezes
It pulls toΦUntil 3mm.
By test, the conductivity for the fine aluminium conducting wire that the present embodiment obtains is 58.05%IACX, and elongation percentage 29.9% resists
Tensile strength is 128 Mpa, and high intensity aluminum conductor conductivity prepared by the present invention is 59.83%IACS, elongation percentage 26.9%, tension
Intensity is 248 Mpa, and therefore, high-intensitive aluminum conductor of the invention can satisfy the requirement of high-voltage line completely.
Embodiment 3
Technical grade rafifinal powder is chosen, 30 μm of average grain diameter or so, purity is greater than 98.5 wt.%.Wc powder purity >
99.9 wt.%, 40 μm of average grain diameter, Al content is 0.5-0.7 wt.% in NiAl powder, and 30-45 μm of average grain diameter, carbon is received
Mitron diameter 100-150 nm, 10-50 μm of length, purity > 99wt.%, specific surface area > 60m2/ g, density > 2.0g/
cm3。
The formula of raw material are as follows:
0.5 wt.% of carbon nanotube；
0.3 wt.% of Wc powder；
0.4 wt.% of NiAl powder；
Al powder surplus.
The raw material weighed by said ratio is put into ball mill and carries out mixing, ball milling tank body is ceramic material, abrading-ball ZrO
Material, a certain amount of ethyl alcohol is added in ball grinder after the completion of raw material loads in mechanical milling process temperature too high oxidation in order to prevent,
Powder and ethyl alcohol volume ratio are 2:1, then are passed through Ar protection, mixing revolving speed 200rpm, mixing time 2h；After the completion of mixing, it will mix
Good powder is pressed into column in advance in a mold；It is subsequently placed into hot pressing furnace and is sintered, sintering temperature is 630 DEG C, and pressure is when sintering
The material sintered is finally put into Hot Extrusion Equipment and preheats 430 DEG C by 30Mpa, time 1h, and extrusion ratio is less than 15:1, squeezes
It pulls toΦUntil 3mm.
By test, the conductivity for the fine aluminium conducting wire that the present embodiment obtains is 58.08%IACX, and elongation percentage 29.8% resists
Tensile strength is 127 Mpa, and high intensity aluminum conductor conductivity prepared by the present invention is 59.82%IACS, elongation percentage 26.8%, tension
Intensity is 249 Mpa, and therefore, high-intensitive aluminum conductor of the invention can satisfy the requirement of high-voltage line completely.
Claims (8)
1. it is a kind of high intensity aluminum conductor, it is characterised in that including component and its content:
Carbon nanotube 0.3-0.5 wt.%
Wc powder 0.15-0.3 wt.%
NiAl powder 0.25-0.4 wt.%
Al powder surplus.
2. high intensity aluminum conductor according to claim 1, it is characterised in that: 26-34 μm of the average grain diameter of Al powder, it is pure
Degree is greater than 98.5 wt.%.
3. high intensity aluminum conductor according to claim 1, it is characterised in that: Wc powder purity > 99.9 wt.%, it is average
40 μm of partial size.
4. high intensity aluminum conductor according to claim 1, it is characterised in that: Al content is 0.5-0.7 in NiAl powder
Wt.%, 30-45 μm of average grain diameter.
5. high intensity aluminum conductor according to claim 1, it is characterised in that: carbon nanotube diameter 100-150 nm, length
10-50 μm, purity > 99wt.%, specific surface area > 60m2/ g, density > 2.0g/cm3。
6. a kind of preparation method of high-intensitive aluminum conductor described in claim 1, it is characterised in that include the following steps:
It is put into ball mill by each raw material and carries out mixing, ball milling tank body is ceramic material, and abrading-ball is ZrO material；Wherein, it is filled in raw material
After the completion of load, ethyl alcohol is added in ball grinder, total powder and ethyl alcohol volume ratio are 2:1, then are passed through inert gas shielding, mixing revolving speed
200rpm, mixing time 2h；
After the completion of mixing, mixed powder is pressed into column in advance in a mold；
It is subsequently placed into hot pressing furnace and is sintered, finally the material sintered is put into Hot Extrusion Equipment and is preheated, then press required pressure
It is strong to squeeze drawing, obtain high-intensitive aluminum conductor.
7. preparation method according to claim 6, it is characterised in that: the sintering temperature of the sintering is 600-630 DEG C, is burnt
Pressure is 28-32Mpa, time 1h when knot.
8. preparation method according to claim 6, it is characterised in that: the material sintered to be put into Hot Extrusion Equipment in advance
When hot, 400-430 DEG C of preheating temperature, extrusion ratio is less than 15:1.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110129606A (en) * | 2019-05-23 | 2019-08-16 | 昆明理工大学 | A kind of preparation method of orientational alignment carbon nano-tube enhancing aluminum-base composite wire rod |
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