CN108531794A - A kind of EHV XLPE power cable conductor material and preparation method thereof - Google Patents
A kind of EHV XLPE power cable conductor material and preparation method thereof Download PDFInfo
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- CN108531794A CN108531794A CN201810361181.9A CN201810361181A CN108531794A CN 108531794 A CN108531794 A CN 108531794A CN 201810361181 A CN201810361181 A CN 201810361181A CN 108531794 A CN108531794 A CN 108531794A
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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
- C22C21/12—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
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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
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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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
- C22F1/057—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
- 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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Abstract
A kind of EHV XLPE power cable conductor material, is made of the element of following mass percent：Al：65~75%；Cu：20~30%；Mg：2~3.5%；RE：0.5~0.8%；In：0.3~0.5%；Ce：0.1~02%；Co：0.1~0.2%.Gained conductor cost low compared with pure cu conductor 30~40% of the invention, resistivity is low, and tensile strength is big, and elasticity modulus is high, and density is small, is suitable as the conductor material of extra-high-tension cable.
Description
Technical field
The present invention relates to technical field of alloy, the conductor more particularly, to a kind of EHV XLPE power cable and its preparation side
Method.
Background technology
EHV XLPE power cable refers to the cable for conveying voltage at 275~800 kilovolts.EHV XLPE power cable generally can be with
It is divided into oil-filled cable and twisted polyethylene cable；Wherein twisted polyethylene cable is with dielectric loss is small, fire protecting performance is good, installation
The advantages that facilitating is laid, the mainstream of development is increasingly becoming.By taking the cross-linked polyethylene insulated cable of 500kV as an example, since conductor
Include conductor shield, crosslinked polyetylene insulated layer, insulation screen, water-blocking buffer layer, metal sheath and outer shield successively outward
Set etc..
Currently, domestic outer cable conductor material mainly has two kinds of copper core, aluminium core.Copper core cable has significantly than aluminium cable
Advantage.It is mainly reflected in the following：(1) copper core cable conductor resistance rate is low：The resistivity of aluminium is approximately 1.68 times of copper；(2)
Copper core cable conductor elasticity modulus is high, is 1.63 times of aluminium cable, can be bent, is ductile.(3) copper core cable conductor tension
Intensity is 2 times of aluminium cable conductor.(4) copper core cable corrosion resistance is good.(5) current-carrying capacity of copper core cable compares aluminium cable
Greatly：It is higher than the current-carrying capacity that aluminium cable allows by 30% or so with the copper core cable in section.
But economically consider, copper processing is more much higher than aluminium price, is probably 3 times of aluminium or so；With 2018 4
For month basic market of the Changjiang river non-ferrous metal on the 16th, the average price of 1# copper is 50460 yuan/ton, the average price of A00 aluminium is 14450 yuan/
Ton, the price of copper is 3.5 times of aluminium, and the economic advantages of aluminium core are apparent.Selection for EHV XLPE power cable conductive material, both
It need to consider economy, more to consider its larger cross-section feature and the secure safety comprising connecting portion, therefore design one kind and be
Requirement can be met and the conductor that can reduce cost is extremely urgent.
Invention content
In view of the above-mentioned problems existing in the prior art, this application provides a kind of EHV XLPE power cable conductor material and
Preparation method.Gained conductor cost low compared with pure cu conductor 30~40% of the invention, resistivity is low, and tensile strength is big, springform
Amount is high, and density is small, good corrosion resistance, is suitable as the conductor material of extra-high-tension cable.
Technical scheme is as follows：
A kind of EHV XLPE power cable conductor material, is made of the element of following mass percent：
Al：65~75%；Cu：20~30%；Mg：2~3.5%；RE：0.5~0.8%；In：0.3~0.5%；Ce：
0.1~0.2%；Co：0.1~0.2%.
Preferably, the EHV XLPE power cable is made of with conductor material the element of following mass percent：
Al：69%；Cu：27%；Mg：2.7%；RE：0.6%；In：0.4%；Ce：0.15%；Co：0.15%.
Further, the preparation method of above-mentioned EHV XLPE power cable conductor material includes the following steps：
(1) high-purity copper ingot is thrown into stove, is warming up to 1200~1250 DEG C, copper ingot is made to be completely melt；Then high-purity aluminium ingot is added,
Addition is the 30~40% of required Al elements dosage；It is whole Al elements the desired amount of 0.1~0.15% that weight is added simultaneously
Refining agent, carry out for the first time refining 30~40 minutes, after skim, the dross on surface is taken off totally；
(2) and then the RE and the desired amount of high-purity aluminium ingot of remaining Al elements of institute expense half is added, is added simultaneously
Weight is the refining agent of the desired amount of 0.3~0.5wt% of whole Al elements, carries out second of refining 30~40 minutes, after
It skims；
(3) and then high-purity Mg, In raw metal is added, after being completely melt, it is that whole Al elements are the desired amount of that weight, which is added,
0.05~0.15% refining agent carries out third time refining 30~40 minutes to molten aluminum, and end is skimmed；
(4) it is eventually adding high-purity Ce, Co raw metal and remaining RE alloys, coverture is added, alloy liquid is protected
Temperature refines 30~40 minutes, miscellaneous, hydrogen in molten aluminum is made to float；It clears up impurity, prepare casting；
(5) two level degasification and slagging-off are carried out before casting, with hydrogen meter detect the hydrogen content control of molten aluminum 0.05~
0.06ml/100g；Then it is filtered a bag primary filter, filter plate secondary filtration, continuous casting and rolling obtains bar material；
(6) temper, 580~605 DEG C of temperature are carried out to bar material；Heat preservation 3~5 hours, naturally cools to room temperature,
Wire drawing and annealing are then carried out in wire drawing machine, obtain conductor monofilament.
Step (6) wire drawing and annealing refer to even drawing continuous annealing process, and linear speed 25-30m/s, annealing electric current is 4-5kA,
Voltage is 35-45V.
The conductor obtained in step (6) is carried out more with monofilament to be twisted, the conductor needed for EHV XLPE power cable is made.
The present invention is beneficial to be had technical effect that：
The advantages of present invention matches by the main element of optimized alloy, has gathered copper, aluminium, magnesium three, in alloy melting
During, the resultant effect that alloy, Ce and Co purify crystal is softened by RE crystal grain thinnings, In, the alloy material of acquisition is brilliant
Grain is tiny, structure is uniform, has been maximally maintained the superiority of main element, and further improve the resistance of entire material
Rate, tensile strength, elasticity modulus, density, the physical and chemical performances such as corrosion resistance.
Specific implementation mode
With reference to embodiment, the present invention is specifically described.Element raw material used is high-purity in following embodiments
Raw material, purity is 99.99% or more；Refining agent used, coverture are convenient source on the market.
Embodiment 1
EHV XLPE power cable provided in this embodiment conductor material, is made of the element of following mass percent：Al：
69%；Cu：27%；Mg：2.7%；RE：0.6%；In：0.4%；Ce：0.15%；Co：0.15%.Preparation method includes such as
Lower step：
(1) high-purity copper ingot is thrown into stove, is warming up to 1220 DEG C, copper ingot is made to be completely melt；Then high-purity aluminium ingot, addition is added
It is the 35% of required Al elements dosage；The refining agent that weight is whole Al elements the desired amount of 0.12%, progress the are added simultaneously
Initial refining 35 minutes, after skim, the dross on surface is taken off totally；
(2) and then the RE and the desired amount of high-purity aluminium ingot of remaining Al elements of institute expense half is added, is added simultaneously
Weight is the refining agent of the desired amount of 0.4wt% of whole Al elements, carries out second and refines 35 minutes, after skim；
(3) and then high-purity Mg, In raw metal is added, after being completely melt, it is that whole Al elements are the desired amount of that weight, which is added,
0.1% refining agent carries out third time refining 35 minutes to molten aluminum, and end is skimmed；
(4) it is eventually adding high-purity Ce, Co raw metal and remaining RE alloys, coverture is added, alloy liquid is protected
Temperature refines 35 minutes, miscellaneous, hydrogen in molten aluminum is made to float；It clears up impurity, prepare casting；
(5) two level degasification and slagging-off are carried out before casting, with hydrogen meter detect the hydrogen content control of molten aluminum 0.05~
0.06ml/100g；Then it is filtered a bag primary filter, filter plate secondary filtration, continuous casting and rolling obtains bar material；
(6) temper, 580 DEG C of temperature are carried out to bar material；Heat preservation 5 hours, naturally cools to room temperature, is then drawing
Wire drawing and annealing are carried out in silk machine, obtains conductor monofilament.The wire drawing and annealing refer to even drawing continuous annealing process, linear speed 25m/
S, annealing electric current are 4kA, voltage 35V.
(7) conductor obtained in step (6) is carried out more with monofilament to be twisted, leading needed for EHV XLPE power cable is made
Body.
Embodiment 2
EHV XLPE power cable provided in this embodiment conductor material, is made of the element of following mass percent：Al：
65%；Cu：30%；Mg：3.5%；RE：0.8%；In：0.3%；Ce：0.2%；Co：0.2%.Preparation method includes as follows
Step：
(1) high-purity copper ingot is thrown into stove, is warming up to 1250 DEG C, copper ingot is made to be completely melt；Then high-purity aluminium ingot, addition is added
It is the 30% of required Al elements dosage；The refining agent that weight is whole Al elements the desired amount of 0.1% is added simultaneously, carries out first
It is secondary refining 30 minutes, after skim, the dross on surface is taken off totally；
(2) and then the RE and the desired amount of high-purity aluminium ingot of remaining Al elements of institute expense half is added, is added simultaneously
Weight is the refining agent of the desired amount of 0.3wt% of whole Al elements, carries out second and refines 30 minutes, after skim；
(3) and then high-purity Mg, In raw metal is added, after being completely melt, it is that whole Al elements are the desired amount of that weight, which is added,
0.05% refining agent carries out third time refining 30 minutes to molten aluminum, and end is skimmed；
(4) it is eventually adding high-purity Ce, Co raw metal and remaining RE alloys, coverture is added, alloy liquid is protected
Temperature refines 30 minutes, miscellaneous, hydrogen in molten aluminum is made to float；It clears up impurity, prepare casting；
(5) two level degasification and slagging-off are carried out before casting, with hydrogen meter detect the hydrogen content control of molten aluminum 0.05~
0.06ml/100g；Then it is filtered a bag primary filter, filter plate secondary filtration, continuous casting and rolling obtains bar material；
(6) temper, 595 DEG C of temperature are carried out to bar material；Heat preservation 4 hours, naturally cools to room temperature, is then drawing
Wire drawing and annealing are carried out in silk machine, obtains conductor monofilament.The wire drawing and annealing refer to even drawing continuous annealing process, linear speed 28m/
S, annealing electric current are 4.5kA, voltage 40V.
(7) conductor obtained in step (6) is carried out more with monofilament to be twisted, leading needed for EHV XLPE power cable is made
Body.
Embodiment 3
EHV XLPE power cable provided in this embodiment conductor material, is made of the element of following mass percent：Al：
74.3%；Cu：22.5%；Mg：2%；RE：0.5%；In：0.5%；Ce：0.1%；Co：0.1%.Preparation method includes such as
Lower step：
(1) high-purity copper ingot is thrown into stove, is warming up to 1200 DEG C, copper ingot is made to be completely melt；Then high-purity aluminium ingot, addition is added
It is the 40% of required Al elements dosage；The refining agent that weight is whole Al elements the desired amount of 0.15%, progress the are added simultaneously
Initial refining 40 minutes, after skim, the dross on surface is taken off totally；
(2) and then the RE and the desired amount of high-purity aluminium ingot of remaining Al elements of institute expense half is added, is added simultaneously
Weight is the refining agent of the desired amount of 0.5wt% of whole Al elements, carries out second and refines 40 minutes, after skim；
(3) and then high-purity Mg, In raw metal is added, after being completely melt, it is that whole Al elements are the desired amount of that weight, which is added,
0.15% refining agent carries out third time refining 40 minutes to molten aluminum, and end is skimmed；
(4) it is eventually adding high-purity Ce, Co raw metal and remaining RE alloys, coverture is added, alloy liquid is protected
Temperature refines 40 minutes, miscellaneous, hydrogen in molten aluminum is made to float；It clears up impurity, prepare casting；
(5) two level degasification and slagging-off are carried out before casting, with hydrogen meter detect the hydrogen content control of molten aluminum 0.05~
0.06ml/100g；Then it is filtered a bag primary filter, filter plate secondary filtration, continuous casting and rolling obtains bar material；
(6) temper, 605 DEG C of temperature are carried out to bar material；Heat preservation 3 hours, naturally cools to room temperature, is then drawing
Wire drawing and annealing are carried out in silk machine, obtains conductor monofilament.The wire drawing and annealing refer to even drawing continuous annealing process, linear speed 30m/
S, annealing electric current are 5kA, voltage 45V.
(7) conductor obtained in step (6) is carried out more with monofilament to be twisted, leading needed for EHV XLPE power cable is made
Body.
Test case
Physical and chemical performance test is carried out to the bar material that embodiment 1 is prepared, test method is according to conventional electrical power cable
The testing standard of conductor material carries out, as shown in table 1 with the performance comparison of fine copper and fine aluminium.
Table 1
It can see from the data of table 1, the performance of cable conductor material of the present invention is between aluminium core and copper core, but cost
Only the 30~40% of copper core have the very strong market competitiveness.
Claims (5)
1. a kind of EHV XLPE power cable conductor material, it is characterised in that be made of the element of following mass percent：
Al：65~75%；Cu：20~30%；Mg：2~3.5%；RE：0.5~0.8%；In：0.3~0.5%；Ce：0.1~
0.2%；Co：0.1~0.2%.
2. EHV XLPE power cable according to claim 1 conductor material, it is characterised in that by following mass percent
Element composition：
Al：69%；Cu：27%；Mg：2.7%；RE：0.6%；In：0.4%；Ce：0.15%；Co：0.15%.
3. a kind of preparation method of EHV XLPE power cable as claimed in claim 1 or 2 conductor material, it is characterised in that including
Following steps：
(1) high-purity copper ingot is thrown into stove, is warming up to 1200~1250 DEG C, copper ingot is made to be completely melt；Then high-purity aluminium ingot is added, is added
Amount is the 30~40% of required Al elements dosage；The essence that weight is whole Al elements the desired amount of 0.1~0.15% is added simultaneously
Refine agent, carry out for the first time refining 30~40 minutes, after skim, the dross on surface is taken off totally；
(2) and then the RE and the desired amount of high-purity aluminium ingot of remaining Al elements of institute expense half is added, while weight is added
For the refining agent of whole the desired amount of 0.3~0.5wt% of Al elements, carry out second of refining 30~40 minutes, after carry out
It skims；
(3) and then high-purity Mg, In raw metal is added, after being completely melt, addition weight is whole Al elements the desired amount of 0.05
~0.15% refining agent carries out third time refining 30~40 minutes to molten aluminum, and end is skimmed；
(4) it is eventually adding high-purity Ce, Co raw metal and remaining RE alloys, coverture is added, alloy liquid is kept the temperature,
Refining 30~40 minutes, makes miscellaneous, hydrogen in molten aluminum float；It clears up impurity, prepare casting；
(5) two level degasification and slagging-off are carried out before casting, the hydrogen content that molten aluminum is detected with hydrogen meter is controlled in 0.05~0.06ml/
100g；Then it is filtered a bag primary filter, filter plate secondary filtration, continuous casting and rolling obtains bar material；
(6) temper, 580~605 DEG C of temperature are carried out to bar material；Heat preservation 3~5 hours, naturally cools to room temperature, then
Wire drawing and annealing are carried out in wire drawing machine, obtain conductor monofilament.
4. preparation method according to claim 3, it is characterised in that step (6) wire drawing and annealing refer to even drawing continuous annealing
Technique, linear speed 25-30m/s, annealing electric current are 4-5kA, voltage 35-45V.
5. preparation method according to claim 3, it is characterised in that carry out with monofilament the conductor obtained in step (6) more
Root is twisted, and the conductor needed for EHV XLPE power cable is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810361181.9A CN108531794B (en) | 2018-04-20 | 2018-04-20 | Conductor material for ultrahigh-voltage power cable and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810361181.9A CN108531794B (en) | 2018-04-20 | 2018-04-20 | Conductor material for ultrahigh-voltage power cable and preparation method thereof |
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| CN108531794B CN108531794B (en) | 2020-01-24 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3807016A (en) * | 1970-07-13 | 1974-04-30 | Southwire Co | Aluminum base alloy electrical conductor |
| CN101593878A (en) * | 2009-07-07 | 2009-12-02 | 山东电力研究院 | Aluminum-copper pseudo alloy anticorrosion coating for grounding network and spraying method thereof |
| CN101604563A (en) * | 2009-06-04 | 2009-12-16 | 郑州电缆有限公司 | A kind of manufacture method of heat-resistant aluminum alloy wire of power cable |
| CN101974709A (en) * | 2010-09-21 | 2011-02-16 | 安徽欣意电缆有限公司 | Super-soft aluminum alloy conductor and preparation method thereof |
| CN104593648A (en) * | 2014-12-25 | 2015-05-06 | 昆山硕磁金属材料制品有限公司 | Cable aluminum alloy material |
-
2018
- 2018-04-20 CN CN201810361181.9A patent/CN108531794B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3807016A (en) * | 1970-07-13 | 1974-04-30 | Southwire Co | Aluminum base alloy electrical conductor |
| CN101604563A (en) * | 2009-06-04 | 2009-12-16 | 郑州电缆有限公司 | A kind of manufacture method of heat-resistant aluminum alloy wire of power cable |
| CN101593878A (en) * | 2009-07-07 | 2009-12-02 | 山东电力研究院 | Aluminum-copper pseudo alloy anticorrosion coating for grounding network and spraying method thereof |
| CN101974709A (en) * | 2010-09-21 | 2011-02-16 | 安徽欣意电缆有限公司 | Super-soft aluminum alloy conductor and preparation method thereof |
| CN104593648A (en) * | 2014-12-25 | 2015-05-06 | 昆山硕磁金属材料制品有限公司 | Cable aluminum alloy material |
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| CN108531794B (en) | 2020-01-24 |
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