CN104532067A - Non-heat treatment medium-strength aluminum alloy conductor material and preparation method thereof - Google Patents
Non-heat treatment medium-strength aluminum alloy conductor material and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a non-heat treatment medium-strength aluminum alloy conductor material and a preparation method thereof, and belongs to the technical field of electrotechnical materials. The non-heat treatment medium-strength aluminum alloy conductor material comprises the following elements in percentage by weight: 0.35%-0.50% of iron, 0.10%-0.25% of copper, 0.01%-0.04% of magnesium, 0.001%-0.002% of boron, 0.02%-0.04% of rare earth (lanthanum or yttrium), impurity element silicon less than or equal to 0.11%, s(chromium+manganese+vanadium+titanium) less than or equal to 0.015%, less than or equal to 0.03% of each of other impurity elements and the balance of aluminum. The non-heat treatment medium-strength aluminum alloy conductor material disclosed by the invention can be used for enhancing the processing hardening rate of an aluminum alloy material to enhance the strength through an iron-containing second phase, copper and magnesium atom enrichment regions and dislocation interaction and enhancing the conductivity and elongation of an aluminum alloy through the matching of the iron, the copper, the magnesium, the rare earth lanthanum or yttrium and the boron. A medium-strength aluminum alloy wire manufactured by adopting the non-heat treatment medium-strength aluminum alloy conductor material can be used for solving the problem of continuous production bottleneck generated due to heat treatment, saving the power consumption and time consumption of heat treatment and reducing the cost and achieves the outstanding economic benefit.
Description
Technical field
The invention belongs to electrical material technical field, be specifically related to strength aluminium alloy conductor material and preparation method thereof in a kind of nonheat-treatable, for strength aluminium alloy wire conductor material in the nonheat-treatable of overhead transmission line.
Background technology
At present, along with the grid-connected transmission of wind-powered electricity generation and solar electrical energy generation and the long distance of overhead transmission line road direction, ultra-high voltage, extra-high voltage development, the energy-conservation and strong focus becoming people's concern of electrical network.In order to reduce the energy consumption on transmitting line, State Grid Corporation of China puts into effect relevant energy-saving wire company standard and takes the lead on newly-built circuit, carried out high conductivity Aluminium Cable Steel Reinforced and the demonstration of middle intensity all aluminum alloy conductor.Middle strength aluminium alloy wire is low with its line loss, and solidity to corrosion is good, draw anharmonic ratio large, continue easy, construction intensity is low receives an acclaim.The monofilament of middle strength aluminium alloy wire has two types: need the heat treated Al-Mg-Si monofilament such as (6101, SI-26) and do not need heat treated Al-Mg (5005), Al-Cu-Mg (1120, ductalex, MS-Al), Al-Fe-Mg (CK76, KAl) and Al-Fe-Cu (stabiloy) monofilament.At present, in China comes into operation intensity all aluminum alloy conductor mostly be ageing treatment Al-Mg-Si monofilament strand system form, this is Al-Mg-Si monofilament not only tensile strength >=240MPa after ageing treatment mainly, electric conductivity >=58.5% (IACS), and it also has higher elongation, elongation >=3.5%, the monofilament of strength aluminium alloy wire in nonheat-treatable, although the requirement of tensile strength and electric conductivity also can be met, affect it because elongation is low and apply on transmitting line.Because in nonheat-treatable, the manufacture of strength aluminium alloy wire does not need thermal treatment, in wire manufacturing processed, not only energy consumption is low, and efficiency is high.Given this, China cable worker never abandons strength aluminium alloy wire in exploitation nonheat-treatable, as Chinese patent CN103545010A, CN102634695A and CN103996427A.Although strength aluminium alloy monofilament electric conductivity reaches 59% (IACS) in the non-heat treated of patent CN103545010A exploitation, tensile strength, more than 240MPa, does not report the elongation of its monofilament.Patent CN102634695A obtains electric conductivity by adjusting component and is not less than 60% (IACS), and tensile strength is more than 240MPa, and elongation is not less than the monofilament of 2.5%.Patent CN103996427A is in order to obtain high conductivity, and the monofilament of high elongation rate, carries out anneal to aluminium bar, but this aluminium alloy monofilament elongation is also only more than or equal to 2.5%.
The raising of wire electric conductivity is related to the energy-conservation of transmitting line, and the raising direct relation of wire elongation rate the strong of transmitting line.The electroconductibility and the elongation that how to improve strength aluminium alloy monofilament in nonheat-treatable are the focuses that cable worker studies always.
Summary of the invention
Object of the present invention is just to provide strength aluminium alloy conductor material and preparation method thereof in a kind of nonheat-treatable, do not need thermal treatment just can realize tensile strength and be not less than 240MPa, electric conductivity is not less than 59.2%IACS, elongation be not less than 3.0% middle strength aluminium alloy wire conductor material.
The present invention is made up of the alloying elements such as aluminium, iron, copper, magnesium, yttrium, lanthanum, boron and inevitable impurity element, the mass percentage of various element is: iron 0.35 ~ 0.50%, copper 0.10 ~ 0.25%, magnesium 0.01 ~ 0.04%, boron 0.001 ~ 0.002%, rare earth (lanthanum or yttrium) 0.02 ~ 0.04%, and impurity elemental silicon≤0.11%, (chromium+manganese+vanadium+titanium)≤0.015%, other often plants impurity content≤0.03%, is aluminium more than amount.
Conductor material preparation process of the present invention is for being Si≤0.11%, Fe≤0.30%, Cu≤0.05%, Mg≤0.04%, (Cr+Mn+V+Ti)≤0.015% by impurity mass percent, and all the other aluminium ingots of often planting impurity element≤0.03% are put into heat to the molten aluminium stove of 740 ~ 760 DEG C and are fused into aluminium liquid and by constant for temperature of aluminum liquid at 730 ~ 750 DEG C.Then adding alloying element with Al-Fe, Al-Mg, Al-Cu and Al-Y-B or Al-La-B master alloy form, is the aluminium alloy containing 0.35 ~ 0.50%Fe, 0.10 ~ 0.25%Cu, 0.01 ~ 0.04%Mg, 0.001 ~ 0.002%B, 0.02 ~ 0.04%RE (La or Y) by the composition adjustment of aluminium liquid.Aluminum alloy melt is stirred, refining leave standstill sampling analysis after 25 ~ 30min, adjust the chemical composition of aluminium alloy, be cast into ingot casting, be rolled into bar and be drawn into the monofilament of required specification.This aluminium alloy does not need to heat-treat in the process preparing ingot, wire and wire rod.
The present invention is mainly through iron content second-phase and copper, magnesium atom enrichment region and dislocation interactions, improve the work hardening rate of aluminum alloy materials and improve intensity, improved electric conductivity and the elongation of aluminium alloy by the cooperation of iron, copper, magnesium, Rare Earth Lanthanum or yttrium and boron.In using material of the present invention to manufacture during strength aluminium alloy wire, continuous casting and rolling mode can be adopted to produce, do not need to carry out Homogenization Treatments to this aluminium alloy ingot or bar, also do not need to carry out ageing treatment to this alloy wire.The middle strength aluminium alloy wire using the present invention to manufacture, can increase span, reduces transmission losses.The present invention provides a kind of type material for overhead power transmission conducting wire material field.Strength aluminium alloy wire in adopting material of the present invention to manufacture, can solve the continuous seepage bottleneck problem produced because of thermal treatment.Save thermal treatment power consumption, consuming time, reduce costs, remarkable in economical benefits.
Embodiment
Embodiment 1: strength aluminium alloy conductor material in a kind of nonheat-treatable, this conductor material is primarily of iron, copper, magnesium, yttrium, boron alloy element, and inevitable impurity element, silicon, chromium, manganese, vanadium, titanium and base aluminum form.The mass percent of alloying element is as follows: 0.35%Fe, 0.14%Cu, 0.025%Mg, 0.02%Y, 0.001%B.
In above-mentioned nonheat-treatable, strength aluminium alloy conductor material preparation technology is: by Si≤0.11%, Fe≤0.30%, Cu≤0.05%, Mg≤0.04%, (Cr+Mn+V+Ti)≤0.015%, and all the other foreign matter contents of often planting impurity element≤0.03% require to select aluminium ingot.Aluminium ingot used is Al99.70 technical pure aluminium ingot, and its foreign matter content is 0.06%Si, 0.17%Fe, 0.02%Cu, 0.001%Mg, 0.009% (Cr+Mn+V+Ti).Take aluminium ingot by the mass percent of above-mentioned alloying element, Al-10Fe alloy, Al-50Cu alloy, Al-10Mg alloy, Al-10Y-1B alloy are prepared burden.Then aluminium ingot is placed in molten aluminium stove and melts, controlling temperature of aluminum liquid is 750 DEG C, add above-mentioned load weighted ferroaluminium, aluminum-copper alloy, aluminum magnesium alloy, aluminium yttrium boron alloy carry out alloying, the refining agent that alloy liquid adopts high pure nitrogen winding-up to account for aluminum alloy melt 0.15% carries out refining, and insulation leaves standstill 30min, composition analysis is carried out in sampling, and adjust chemical composition to 0.35%Fe, 0.14%Cu, 0.025%Mg, namely 0.02%Y, 0.001%B obtain strength aluminium alloy conductor material in nonheat-treatable.The bar of Φ 9.5mm is become to be drawn into the monofilament of Φ 3mm more above-mentioned aluminum alloy continuous casting tandem rolling.The electric conductivity of this monofilament is 59.6% (IACS), and tensile strength is 269MPa, unit elongation 3.0%.
Embodiment 2: strength aluminium alloy conductor material in a kind of nonheat-treatable, this conductor material is primarily of iron, copper, magnesium, lanthanum, boron alloy element, and inevitable impurity element, silicon, chromium, manganese, vanadium, titanium and base aluminum form.The mass percent of alloying element is as follows: 0.50%Fe, 0.10%Cu, 0.013%Mg, 0.03%La, 0.003%B.
In above-mentioned nonheat-treatable, strength aluminium alloy conductor material preparation technology is: by Si≤0.11%, Fe≤0.30%, Cu≤0.05%, Mg≤0.04%, (Cr+Mn+V+Ti)≤0.015%, and all the other foreign matter contents of often planting impurity element≤0.03% require to select aluminium ingot.Aluminium ingot used is Al99.70 technical pure aluminium ingot, and its foreign matter content is 0.08%Si, 0.18%Fe, 0.022%Cu, 0.002%Mg, 0.011% (Cr+Mn+V+Ti).Take aluminium ingot by the mass percent of above-mentioned alloying element, Al-10Fe alloy, Al-30Cu alloy, Al-15Mg alloy, Al-10La-1B alloy are prepared burden.Then aluminium ingot is placed in molten aluminium stove and melts, controlling temperature of aluminum liquid is 730 DEG C, add above-mentioned load weighted ferroaluminium, aluminum-copper alloy, aluminum magnesium alloy, aluminium lanthanum boron alloy carry out alloying, the refining agent that alloy liquid adopts high pure nitrogen winding-up to account for aluminum alloy melt 0.2% carries out refining, and insulation leaves standstill 25min, composition analysis is carried out in sampling, and adjust chemical composition to 0.50%Fe, 0.10%Cu, 0.013%Mg, namely 0.03%La, 0.003%B obtain strength aluminium alloy conductor material in nonheat-treatable.The bar of Φ 9.5mm is become to be drawn into the monofilament of Φ 3.6mm more above-mentioned aluminum alloy continuous casting tandem rolling.The electric conductivity of this monofilament is 59.4% (IACS), and tensile strength is 261MPa, unit elongation 3.2%.
Embodiment 3: strength aluminium alloy conductor material in a kind of nonheat-treatable, this conductor material is primarily of iron, copper, magnesium, yttrium, boron alloy element, and inevitable impurity element, silicon, chromium, manganese, vanadium, titanium and base aluminum form.The mass percent of alloying element is as follows: 0.41%Fe, 0.25%Cu, 0.03%Mg, 0.026%Y, 0.0026%B.
In above-mentioned nonheat-treatable, strength aluminium alloy conductor material preparation technology is: by Si≤0.11%, Fe≤0.30%, Cu≤0.05%, Mg≤0.04%, (Cr+Mn+V+Ti)≤0.015%, and all the other foreign matter contents of often planting impurity element≤0.03% require to select aluminium ingot.Aluminium ingot used is Al99.70 technical pure aluminium ingot, and its foreign matter content is 0.10%Si, 0.23%Fe, 0.02%Cu, 0.0013%Mg, 0.013% (Cr+Mn+V+Ti).Take aluminium ingot by the mass percent of above-mentioned alloying element, Al-6Fe alloy, Al-20Cu alloy, Al-10Mg alloy, Al-10Y-1B alloy are prepared burden.Then aluminium ingot is placed in molten aluminium stove and melts, controlling temperature of aluminum liquid is 740 DEG C, add above-mentioned load weighted ferroaluminium, aluminum-copper alloy, aluminum magnesium alloy, aluminium yttrium boron alloy carry out alloying, the refining agent that alloy liquid adopts high pure nitrogen winding-up to account for aluminum alloy melt 0.18% carries out refining, and insulation leaves standstill 30min, composition analysis is carried out in sampling, and adjust chemical composition to 0.41%Fe, 0.25%Cu, 0.03%Mg, namely 0.026%Y, 0.0026%B obtain strength aluminium alloy conductor material in nonheat-treatable.The bar of Φ 9.5mm is become to be drawn into the monofilament of Φ 4.2mm more above-mentioned aluminum alloy continuous casting tandem rolling.The electric conductivity of this monofilament is 59.7% (IACS), and tensile strength is 256MPa, unit elongation 3.4%.
Above embodiment is only for illustration of the present invention, but not limitation of the present invention.
The chemical composition of obtained comparative example alloy is in table 1 as stated above, and the wood property of comparative example alloy can in table 2
The chemical composition of table 1 comparative example alloy
| Numbering | Chemical composition | Impurity component |
| Fe Cu Mg B Y La | Si Cu Mg Cr+Mn+V+Ti | |
| 1 | 0.33--0.0008-- | 0.05 0.004 0.003 0.009 |
| 2 | 0.31 0.21-0.0005-- | 0.04-0.0002 0.014 |
| 3 | 0.36 0.16--0.03- | 0.05-0.005 0.011 |
| 4 | 0.66--0.003-- | 0.06 0.005 0.008 0.009 |
| 5 | 0.50-0.22 0.005 0.02- | 0.06 0.005-0.010 |
| 6 | 0.16 0.25 0.13 0.002 -0.015 | 0.08--0.012 |
The performance of table 2 comparative example alloy
In comparative example 1-6, the chemical composition of aluminium alloy is outside composition range of the present invention.Only containing a small amount of Fe, B in comparative example 1, do not add Cu, Mg and rare earth, although its electric conductivity is higher, owing to only there is a small amount of Fe-riched phase, there is no Cu, Mg atom enrichment region, make work-hardening effect less, thus intensity is lower, in comparative example 2, add Cu content, the interpolation of copper can improve intensity, but reduces electric conductivity, has certain improvement result to elongation.Comparative example 3 adds rare earth further, and it has contribution to raising intensity, but can not meet the requirement of strength of middle strength aluminium alloy wire.Although want in comparative example 4 to generate more Fe-riched phase to improve work-hardening effect by improving iron level, thus improve intensity, improve B content simultaneously and improve electroconductibility, eventually make because iron level is higher electric conductivity lower.In comparative example 5 with Mg for Cu, visible Mg add on electric conductivity impact larger.In comparative example 6, Fe content is less, and Mg content is more, although intensity and elongation meet the demands, electric conductivity is still slightly low.
Claims (3)
1. strength aluminium alloy conductor material in a nonheat-treatable, it is characterized in that, the mass percentage of various element is: iron 0.35 ~ 0.50%, copper 0.10 ~ 0.25%, magnesium 0.01 ~ 0.04%, boron 0.001 ~ 0.002%, rare earth 0.02 ~ 0.04%, and impurity elemental silicon≤0.11%, (chromium+manganese+vanadium+titanium)≤0.015%, surplus is aluminium.
2. aluminum-alloy conductor material according to claim 1, is characterized in that, described rare earth is lanthanum or yttrium.
3. the preparation method of an aluminum-alloy conductor material according to claim 1, it is characterized in that, it is Si≤0.11%, Fe≤0.30%, Cu≤0.05%, Mg≤0.04%, (Cr+Mn+V+Ti)≤0.015% by impurity mass percent, all the other aluminium ingots of often planting impurity element≤0.03% are put into the molten aluminium stove of heating to 740 ~ 760 DEG C and are fused into aluminium liquid, by constant for temperature of aluminum liquid at 730 ~ 750 DEG C; Then adding alloying element with Al-Fe, Al-Mg, Al-Cu and Al-Y-B or Al-La-B master alloy form, is the aluminium alloy containing 0.35 ~ 0.50%Fe, 0.10 ~ 0.25%Cu, 0.01 ~ 0.04%Mg, 0.001 ~ 0.002%B, 0.02 ~ 0.04%RE by the composition adjustment of aluminium liquid; Aluminum alloy melt is stirred, refining leave standstill sampling analysis after 25 ~ 30min, adjust the chemical composition of aluminium alloy, be cast into ingot casting, be rolled into bar and be drawn into the monofilament of required specification.
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Cited By (7)
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| CN104975211A (en) * | 2015-07-30 | 2015-10-14 | 国网智能电网研究院 | High-conductivity thermal-treatment type medium-strength aluminum alloy conducting filament |
| CN105506422A (en) * | 2015-08-21 | 2016-04-20 | 国网山东省电力公司临沂供电公司 | Non-heat-treatment type heat resisting aluminum alloy monofilament |
| CN106957977A (en) * | 2017-05-24 | 2017-07-18 | 中国科学院金属研究所 | A kind of nonheat-treatable Antibacterial aluminum alloy and its preparation technology |
| CN108642337A (en) * | 2018-06-26 | 2018-10-12 | 安徽沪源铝业有限公司 | A kind of electrician is with 8030 aluminium alloy rods and its manufacturing process |
| CN108754244A (en) * | 2018-06-19 | 2018-11-06 | 江苏亨通电力特种导线有限公司 | Strength aluminium alloy line and preparation method thereof in nonheat-treatable |
| CN113151716A (en) * | 2021-03-08 | 2021-07-23 | 上海工程技术大学 | Al-Fe-Mg-Cu aluminum alloy for cable shielding and preparation method thereof |
| CN114737087A (en) * | 2022-04-21 | 2022-07-12 | 温州国马纳米科技有限公司 | Graphene aluminum alloy material and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104975211A (en) * | 2015-07-30 | 2015-10-14 | 国网智能电网研究院 | High-conductivity thermal-treatment type medium-strength aluminum alloy conducting filament |
| CN105506422A (en) * | 2015-08-21 | 2016-04-20 | 国网山东省电力公司临沂供电公司 | Non-heat-treatment type heat resisting aluminum alloy monofilament |
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| CN106957977A (en) * | 2017-05-24 | 2017-07-18 | 中国科学院金属研究所 | A kind of nonheat-treatable Antibacterial aluminum alloy and its preparation technology |
| CN108754244A (en) * | 2018-06-19 | 2018-11-06 | 江苏亨通电力特种导线有限公司 | Strength aluminium alloy line and preparation method thereof in nonheat-treatable |
| CN108642337A (en) * | 2018-06-26 | 2018-10-12 | 安徽沪源铝业有限公司 | A kind of electrician is with 8030 aluminium alloy rods and its manufacturing process |
| CN113151716A (en) * | 2021-03-08 | 2021-07-23 | 上海工程技术大学 | Al-Fe-Mg-Cu aluminum alloy for cable shielding and preparation method thereof |
| CN114737087A (en) * | 2022-04-21 | 2022-07-12 | 温州国马纳米科技有限公司 | Graphene aluminum alloy material and preparation method thereof |
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