CN106623478A - Manufacturing method of high-conductivity high-strength aluminum alloy wire for smart power grid - Google Patents
Manufacturing method of high-conductivity high-strength aluminum alloy wire for smart power grid Download PDFInfo
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- CN106623478A CN106623478A CN201611143869.7A CN201611143869A CN106623478A CN 106623478 A CN106623478 A CN 106623478A CN 201611143869 A CN201611143869 A CN 201611143869A CN 106623478 A CN106623478 A CN 106623478A
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- aluminum alloy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
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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
- 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
- C22F1/05—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 of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/02—Stranding-up
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- Manufacturing & Machinery (AREA)
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Abstract
The invention discloses a manufacturing method of a high-conductivity high-strength aluminum alloy wire for a smart power grid. The method includes the steps that firstly, an aluminum alloy continuous casting and continuous rolling unit with an on-line purification system is used for conducting machining to obtain a supersaturated aluminum alloy rod; secondly, natural aging is conducted on the supersaturated aluminum alloy rod; thirdly, cold drawing is conducted on the aluminum alloy rod obtained in the second step to form an aluminum alloy wire; fourthly, the aluminum alloy wire is placed into a continuous aging oven for manual aging strengthening treatment; and fifthly, multiple wires obtained through the fourth step are concentrically twisted, and the performance of the twisted high-strength aluminum alloy wire meets the conditions that the tensile strength is not smaller than 340 MPa, the elongation is not smaller than 5.0%, the 20 DEG C direct current resistant rate is not higher than 0.031927 ohm.mm2/m, and the electric conductivity is not smaller than 54.0%IACS. The wire obtained through the manufacturing method has the characteristics of being high in tension-weight ratio, good in electric conductivity and high in overload resistance; the process is simple; and the method is suitable for industrial production, can greatly save line construction cost and operation cost when applied to the smart power grid field, and has excellent economic benefits.
Description
Technical field
The present invention relates to a kind of manufacture method of high connductivity high-strength aluminum alloy wire used for intelligent electric network, belongs to power transmission
Field.
Background technology
With developing rapidly for World Economics, in many countries and regions, power supply becomes restriction economic development
One key factor, newly-built, reconstruction circuit demand is very vigorous.Especially in developing country, such as Africa, Latin America, Southeast Asia
Deng area, transmission line construction wretched insufficiency or backwardness, electrical problem is severeer, and as the electricity consumption population in Africa, to only have 24% left
The right side, the construction of overhead transmission line will be the engineering of scale of having very much in future, and the demand of aerial condutor is also by sustainable growth.
High-strength aluminum alloy twisted wire has that resistance loss is low, sag performance is good, the features such as corrosion-resistant, can save electric energy, tower
Material and land resource, improve circuit service life, can be not only used for typically making somebody a mere figurehead electric line, can be used for 1000 meters or so big
Span transmission line.
At present, the 315～325MPa of tensile strength of aluminium alloy wire conventional both at home and abroad, conductance 52.5%, stranded conductor
Electric conductivity and the more conventional steel-cored aluminium strand advantage of mechanical property and not very big.Therefore, domestic and international overhead transmission line still with
Based on steel-cored aluminium strand.The conductance of aluminium alloy wire often lifts 1%IACS, and stranded conductor can reduce line loss more than 3%,
With fairly obvious economic benefit.The pull-off force of aluminium alloy conductor how is further improved, D.C. resistance is reduced, is strengthened aluminium and is closed
The performance advantage of golden wire, reduces line construction cost, energy-saving, expands its use range, and overhead transmission line is built
If significant.For this purpose, the conductance and intensity of aluminium alloy wire are significantly improved simultaneously, it is stranded after obtain high connductivity high intensity aluminium
Alloy lead wire, can be fairly obvious relative to the performance advantage of conventional steel core aluminum stranded conductor, can greatly promote the application of the product, and produces
The good economic and social benefits of life.
Although currently have research aluminium alloy wire performance is got a promotion, itself or using the higher aluminium ingot of purity
(99.8% and more than), cost performance is difficult to be lifted；Or using special process meanses, it is difficult to meet the bar of industrialized production
Part.For this reason, it may be necessary to study in the case where cost is not increased, so that the property of aluminium alloy wire can be improved with the path of realization of industrialization
Energy.
The content of the invention
It is an object of the invention to provide the more prominent high connductivity high-strength aluminum alloy of a kind of electric conductivity and mechanical property
The manufacture method of twisted wire.
Realization the technical scheme is that a kind of manufacture method of high connductivity high-strength aluminum alloy wire used for intelligent electric network,
Comprise the following steps：
Step one：Supersaturation aluminium alloy is obtained using the processing of the aluminum alloy continuous casting tandem rolling unit with in-line purification system
Bar, the performance of aluminium alloy rod should meet：170～200MPa of tensile strength, elongation >=13%, 20 DEG C of dc resistivities≤
0.03400Ω·mm2/m；
Step 2：Natrual ageing is carried out to being supersaturated aluminium alloy rod, aluminium alloy rod performance should meet after natrual ageing：Tension
165～195MPa of intensity, elongation >=15%, 20 DEG C of dc resistivity≤0.03370 Ω mm2/m；
Step 3：Aluminium alloy rod that step 2 is obtained is cold drawn for aluminium alloy wire, and the aluminium alloy wire performance of drawing should meet：
Tensile strength >=310MPa, 20 DEG C of dc resistivity≤0.032450 Ω mm2/m；
Step 4：Aluminium alloy wire is put in progressive aging stove carries out artificial aging intensive treatment, single line performance after timeliness
Should meet：Tensile strength >=345MPa, elongation >=5.0%, 20 DEG C of dc resistivity≤0.031750 Ω mm2/ m, it is conductive
Rate >=54.3%；
Step 5：The single line concentric stranding that many step 4 are obtained, stranded rear high-strength aluminum alloy single line performance should expire
Foot：Tensile strength >=340MPa, elongation >=5.0%, 20 DEG C of dc resistivity≤0.031927 Ω mm2/ m, conductance >=
54.0%IACS.
The step one is obtained the method for supersaturation aluminium alloy rod：99.7% aluminium ingot and aluminium alloy ingots are carried out into composition to match somebody with somebody
Than melting, adding ingredient mass percent is, Mg：0.66%～0.75%；Si：0.62%～0.70%；Fe：0.25%～
0.30%；Y >=0.001%；Ti+V+Mn+Cr≤0.02%, aluminium alloy solution per ton adds 3～4kg aluminum-boron alloy ingots；Alloy
Order of addition is alusil alloy --- alfer --- aluminium yittrium alloy --- aluminum-boron alloy ingot, adds magnesium ingot after 30～40min,
Refining 30min, stands 35～50min after skimming；750～800 DEG C of alloy melting temp；By removing outside stove in chute after melting
Gas filtration system, and make hydrogen content be not higher than 0.18ml/100g, 700～720 DEG C of cast temperature enters to roll 510～530 DEG C of temperature；
Casting Shi Tiaoge areas section cooling water flow, make ingot blank section in etc. shaft-like crystal grain.
In the step 2, the method for carrying out natrual ageing is：The supersaturation aluminium alloy rod that step one is obtained is placed in room
The natrual ageing of 72～120h is carried out under temperature.
In the step 3, the cold drawn method for aluminium alloy wire of aluminium alloy rod is：Drawn using non-slip aluminum alloy drawing machine
Aluminium alloy wire, 10～15m/s of drawing speed are made, wire finishing die is nano coating mould.
In the step 4, the method that artificial progressive aging intensive treatment is carried out to aluminium alloy wire is：150 DEG C of aging temp
～160 DEG C, 5～10h of aging time, natural cooling of coming out of the stove after heat treatment is no less than 16h.
In the step 5, stranding method is：By aluminium alloy round wires concentric stranding 1-5 layers；Or be with aluminium alloy round wires
Core, stranded 1～5 layer of ladder track of outer layer or Z-shaped.
After employing above-mentioned technical proposal, the present invention has following beneficial effect：The present invention is using common 99.7%
Aluminium ingot, by optimizing product composition, adjusts boronation order, and improves corresponding production technology, so as to obtain electric conductivity and
The more excellent wire of mechanical property, improves the use value of product, promotes the application of product.
Specific embodiment
(instantiation 1)：
(1) according to mass percent, Mg：0.68%；Si：0.65%；Fe：0.28%；Y：0.0008%；Ti+V+Mn+
Cr：0.015% carries out alloy melting, 760 DEG C of alloy melting temp；Rare earth optimization, boronation 30min, refine 30min, after skimming
Stand 40min；
(2) continuous casting and rolling aluminium alloy rod after standing, 700 DEG C of cast temperature enters to roll 515 DEG C of temperature；
(3) aluminium alloy rod natrual ageing 84h at room temperature that continuous casting and rolling is obtained；Bar is enabled aluminum alloy to by natrual ageing to roll
Stress processed is necessarily discharged, and forms the GP areas that hardening constituent is separated out on a small quantity.
(4) aluminium alloy rod after natrual ageing draws φ 3.50mm aluminium alloy round wires, drawing speed 15m/s；
(5) aluminium alloy round wires are carried out into artificial aging, 155 DEG C of aging temp, timeliness 6.5h.
(6) artificial aging aluminium alloy wire round wires are twisted with one heart according to tetra- layers of disposable concentric strandings of 1+6+12+18+24 for round wires
High connductivity high-strength aluminum alloy twisted wire.
(instantiation 2)：
(1) according to mass percent, Mg：0.72%；Si：0.69%；Fe：0.25%；Y：0.001%；Ti+V+Mn+Cr：
0.018% carries out alloy melting, 780 DEG C of alloy melting temp；Rare earth optimization, boronation 35min, refine 30min, stand after skimming
50min；
(2) continuous casting and rolling aluminium alloy rod after standing, 710 DEG C of cast temperature enters to roll 525 DEG C of temperature；
(3) aluminium alloy rod natrual ageing 96h at room temperature that continuous casting and rolling is obtained；
(4) aluminium alloy rod after natrual ageing draws φ 3.07mm aluminium alloys round wires and equivalent diameter φ 4.43mm aluminium alloys
" Z " molded line, drawing speed 10m/s；
(5) aluminium alloy round wires are carried out into artificial aging, 158 DEG C of aging temp, timeliness 8h.
(6) artificial aging aluminium alloy wire round wires are stranded according to 1+6, and it is same that outer layer concentric stranding 10+16 " Z " molded line obtains molded line
The heart twists high connductivity high-strength aluminum alloy twisted wire.
Particular embodiments described above, has been carried out further in detail to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail it is bright, should be understood that the above high connductivity high-strength aluminum alloy wire used for intelligent electric network be only the present invention it is concrete
Embodiment is represented, and is not limited to the present invention, all any modifications within the spirit and principles in the present invention, made,
Equivalent, improvement etc., should be included within the scope of the present invention.
Claims (6)
1. a kind of manufacture method of high connductivity high-strength aluminum alloy wire used for intelligent electric network, it is characterised in that comprise the following steps：
Step one：Supersaturation aluminium alloy rod, aluminium is obtained using the processing of the aluminum alloy continuous casting tandem rolling unit with in-line purification system
The performance of rod of metal alloy should meet：170～200MPa of tensile strength, elongation >=13%, 20 DEG C of dc resistivity≤0.03400
Ω·mm2/m；
Step 2：Natrual ageing is carried out to being supersaturated aluminium alloy rod, aluminium alloy rod performance should meet after natrual ageing：Tensile strength
165～195MPa, elongation >=15%, 20 DEG C of dc resistivity≤0.03370 Ω mm2/m；
Step 3：Aluminium alloy rod that step 2 is obtained is cold drawn for aluminium alloy wire, and the aluminium alloy wire performance of drawing should meet：Tension
Intensity >=310MPa, 20 DEG C of dc resistivity≤0.032450 Ω mm2/m；
Step 4：Aluminium alloy wire is put in progressive aging stove carries out artificial aging intensive treatment, and single line performance should expire after timeliness
Foot：Tensile strength >=345MPa, elongation >=5.0%, 20 DEG C of dc resistivity≤0.031750 Ω mm2/ m, conductance >=
54.3%；
Step 5：The single line concentric stranding that many step 4 are obtained, stranded rear high-strength aluminum alloy single line performance should meet：It is anti-
Tensile strength >=340MPa, elongation >=5.0%, 20 DEG C of dc resistivity≤0.031927 Ω mm2/ m, conductance >=54.0%
IACS。
2. the manufacture method of a kind of high connductivity high-strength aluminum alloy wire used for intelligent electric network according to claim 1, it is special
Levy and be, the step one is obtained the method for supersaturation aluminium alloy rod and is：99.7% aluminium ingot and aluminium alloy ingots are carried out into composition to match somebody with somebody
Than melting, adding ingredient mass percent is, Mg：0.66%～0.75%；Si：0.62%～0.70%；Fe：0.25%～
0.30%；Y >=0.001%；Ti+V+Mn+Cr≤0.02%, aluminium alloy solution per ton adds 3～4kg aluminum-boron alloy ingots；Alloy
Order of addition is alusil alloy --- alfer --- aluminium yittrium alloy --- aluminum-boron alloy ingot, adds magnesium ingot after 30～40min,
Refining 30min, stands 35～50min after skimming；750～800 DEG C of alloy melting temp；By removing outside stove in chute after melting
Gas filtration system, and make hydrogen content be not higher than 0.18ml/100g, 700～720 DEG C of cast temperature enters to roll 510～530 DEG C of temperature；
Casting Shi Tiaoge areas section cooling water flow, make ingot blank section in etc. shaft-like crystal grain.
3. the manufacture method of a kind of high connductivity high-strength aluminum alloy wire used for intelligent electric network according to claim 1, it is special
Levy and be, in the step 2, the method for carrying out natrual ageing is：The supersaturation aluminium alloy rod that step one is obtained is placed in room temperature
Under carry out the natrual ageing of 72～120h.
4. the manufacture method of a kind of high connductivity high-strength aluminum alloy wire used for intelligent electric network according to claim 1, it is special
Levy and be, in the step 3, the cold drawn method for aluminium alloy wire of aluminium alloy rod is：Drawn using non-slip aluminum alloy drawing machine
Go out aluminium alloy wire, 10～15m/s of drawing speed, wire finishing die is nano coating mould.
5. the manufacture method of a kind of high connductivity high-strength aluminum alloy wire used for intelligent electric network according to claim 1, it is special
Levy and be, in the step 4, the method that artificial progressive aging intensive treatment is carried out to aluminium alloy wire is：150 DEG C of aging temp
～160 DEG C, 5～10h of aging time, natural cooling of coming out of the stove after heat treatment is no less than 16h.
6. the manufacture method of a kind of high connductivity high-strength aluminum alloy wire used for intelligent electric network according to claim 1, it is special
Levy and be, in the step 5, stranding method is：By aluminium alloy round wires concentric stranding 1-5 layers；Or be with aluminium alloy round wires
Core, stranded 1～5 layer of ladder track of outer layer or Z-shaped.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107358994A (en) * | 2017-08-09 | 2017-11-17 | 远东电缆有限公司 | Extra High Strength steel core high strength heat resistant alloy wire used for intelligent electric network and preparation method thereof |
| CN109207759A (en) * | 2018-10-31 | 2019-01-15 | 远东电缆有限公司 | Acting type high-strength high-conductivity aluminium alloy frame hollow wire and preparation method thereof when non- |
| CN113345625A (en) * | 2021-05-28 | 2021-09-03 | 远东电缆有限公司 | Energy-saving double-capacity wire and preparation method thereof |
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| CN113345625A (en) * | 2021-05-28 | 2021-09-03 | 远东电缆有限公司 | Energy-saving double-capacity wire and preparation method thereof |
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| CN106623478B (en) | 2018-08-31 |
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