CN102453819B - Manufacture method of medium-strength aluminum alloy wire with electrical conductivity of 59 percent - Google Patents

Manufacture method of medium-strength aluminum alloy wire with electrical conductivity of 59 percent Download PDF

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Publication number
CN102453819B
CN102453819B CN201010520544.2A CN201010520544A CN102453819B CN 102453819 B CN102453819 B CN 102453819B CN 201010520544 A CN201010520544 A CN 201010520544A CN 102453819 B CN102453819 B CN 102453819B
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China
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aluminium alloy
alloy
strength
aluminum alloy
aluminum
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CN201010520544.2A
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Chinese (zh)
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CN102453819A (en
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陆伟
尤伟任
缪小林
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上海中天铝线有限公司
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Abstract

The invention provides a manufacture method of a medium-strength aluminum alloy wire with electrical conductivity of 59 percent. The method comprises the following steps of: A, preparing molten aluminum by selecting an aluminum ingot as a raw material, wherein the aluminum ingot comprises the following impurities in percentage: less than or equal to 0.08 percent of silicon, less than or equal to 0.16 percent of iron, less than or equal to 0.01 percent of copper, less than or equal to 0.015 percent of titanium, vanadium, chromium and manganese, and less than or equal to 0.03 percent of other impurities; B, melting the alloy liquid to realize that the silicon is controlled to be between 0.40 and 0.55 weight percent, magnesium is controlled to be between 0.35 and 0.50 weight percent, and copper is controlled to be between 0.020 and 0.040 weight percent in the alloy liquid; C, casting into an aluminum alloy ingot; D, rolling into a medium-strength aluminum alloy rod; E; drawing into a medium-strength aluminum alloy single wire; and F, twisting to form a medium-strength aluminum alloy wire finished product with electrical conductivity of 59 percent. The medium-strength aluminum alloy wire with electrical conductivity of 59 percent manufactured by adopting the method has higher tensile strength than that of an aluminum wire and higher electrical conductivity than that of a common aluminum alloy conductor, can replace a steel-core aluminum conductor, and can be used as a lead wire of a long-span transmission circuit.

Description

Electric conductivity is the manufacture method of 59% middle strength aluminium alloy line
Technical field
The present invention relates to a kind of wire, relate in particular to a kind of electric conductivity and be the manufacture method of 59% middle strength aluminium alloy line.
Background technology
Aluminium alloy conductor normally obtains alloy pole stock with aluminium ingot through melting, alloying, refining and common continuous casting and rolling, then through bracing wire and thermal treatment, just can reach the above mechanical, electrical performance requriements of 60%IACS.Want to make high-conductive heat-resistance aluminium alloy wire, just must strictly control the foreign matter content in alloy, and be added with the trace element that is beneficial to raising recrystallization temperature, also will adopt suitable manufacturing process.
The cable of prior art generally adopts Aluminium Cable Steel Reinforced, but along with aerial line is to large capacity, ultra-high voltage development, adopts large section, heat-resistingization of split conductor and wire also to grow up gradually.So not only need heat resistant aluminum alloy wire, also need to replace general Aluminium Cable Steel Reinforced with middle intensity or high-intensity aluminum alloy line, to improve the current capacity of wire.
At present, obtain the middle strength aluminium alloy line of high conductivity, through conventional melting, alloying, concise (crystal grain thinning) and continuous casting and rolling mode, to obtain alloy pole stock with aluminium ingot, this pole stock, again through bracing wire and thermal treatment, just can reach the requirement (electric conductivity reaches 59%IACS) of machinery, electric property.But due to the defect of manufacturing equipment and the unstable object that makes the salient features (electric conductivity, tensile strength) of strength aluminium alloy line in high conduction also not reach stably manufactured of manufacturing process.
Summary of the invention
Object of the present invention, exactly in order to address the above problem, it is the manufacture method of 59% middle strength aluminium alloy line that a kind of electric conductivity is provided.
In order to achieve the above object, the present invention has adopted following technical scheme: the manufacture method of the middle strength aluminium alloy line that a kind of electric conductivity is 59%, comprises the following steps:
A, prepare aluminium liquid
Select the weight percentage of impurity to be: silicon≤0.08%, iron≤0.16%, copper≤0.01%, titanium+vanadium+chromium+manganese≤0.015%, the aluminium ingot of other impurity≤0.03%, as raw material, is put into shaft furnace and is fused into aluminium liquid;
B, molten alloy liquid
Aluminium liquid is proceeded in the kettle furnace of automatic temperature controlling, and quantitatively add aluminium-silicon ingots, the melting together with magnesium ingot of aluminum-copper alloy ingot in holding furnace, refine into aluminum alloy melt; By high-speed light spectrometer, carry out stokehold rapid detection therebetween, the weight percentage of controlling the Its Related Elements in aluminum alloy melt is: silicon 0.40~0.55%, magnesium 0.35~0.50%, copper 0.020~0.040%;
C, cast aluminum alloys ingot casting
After aluminum alloy melt in holding furnace is processed with crystal grain thinning after filtration, send into aluminium alloy continuous caster and cast, form aluminium alloy cast ingot;
Strength aluminium alloy bar in D, rolling
After aluminium alloy cast ingot is carried out to solutionizing processing and quenches, send into aluminium alloy tandem rolling unit and be rolled into middle strength aluminium alloy bar;
Strength aluminium alloy single line in E, drawing
Centering strength aluminium alloy bar carries out after hot homogenizing processing, sends into aluminum alloy wire-drawing machine and is drawn into middle strength aluminium alloy single line;
F, to be twisted into electric conductivity be 59% middle strength aluminium alloy line finished product
Middle strength aluminium alloy single line is undertaken after ageing treatment by aging oven, and sending into frame type stranding machine, to be twisted into electric conductivity be 59% middle strength aluminium alloy line finished product.
Aluminium alloy continuous caster described in step C adopts the wheeled crystallizing wheel of H type.
Aluminium alloy tandem rolling unit described in step D is the Combined aluminum alloy tandem rolling unit that two rollers add three rollers, in the operation of rolling, enters to roll temperature and is controlled at 480~520 ℃, and finishing temperature is controlled at 250~300 ℃.
The temperature of the solutionizing processing described in step D is controlled at 200~240 ℃.
The temperature of the hot homogenizing processing described in step e is controlled at 200 ℃~220 ℃, and the time is controlled at 5~6 hours.
The pull wire speed of the aluminum alloy wire-drawing machine described in step e is controlled at 8~25 meter per seconds.
The present invention, owing to having adopted above technical scheme, makes it have following advantage and disadvantage:
1, adopt high-speed light spectrometer, can rapid detection principal element content, control in time the content of silicon and magnesium in aluminum alloy melt, guarantee batch production.
2, middle strength aluminium alloy twisted wire is applied to transmitting line, along with aerial line is to large capacity, ultra-high voltage development, middle intensity and aldural twisted wire is widely used on the line, to substitute traditional Aluminium Cable Steel Reinforced.
3, middle strength aluminium alloy twisted wire is mainly used for aerial condutor with hard wire, has significant economic benefit.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
The manufacture method of the middle strength aluminium alloy line that a kind of electric conductivity of the present invention is 59% is: selection foreign matter content is the aluminium ingot of silicon≤0.08%, iron≤0.16%, copper≤0.01%, (titanium+vanadium+chromium+manganese)≤0.015%, other impurity≤0.03%, puts into shaft furnace and is fused into aluminium liquid; Then move in the holding furnace that can fascinate, and quantitatively add aluminium-silicon ingots, the melting together with magnesium ingot of aluminum-copper alloy ingot in holding furnace, carry out Alloying Treatment, fire box temperature is controlled at 900 ℃, aluminium alloy temperature is controlled at 720-740 ℃, through the processing that stirs, with the refining agent refining (crystal grain thinning) of solid or gas and solid and gas mixing, with solid insulating covering agent aluminium coating liquid surface, and be standingly no less than 45 minutes; Principal element is detected with high-speed light spectrometer, when monitoring, content depart from, adjust, reach each elementary composition of controlling in aluminum alloy melt.Wherein, silicon is controlled at 0.40~0.55% weight, and magnesium is controlled at 0.35~0.50% weight, and copper is controlled at 0.020~0.040% weight; Then by the holding furnace that can fascinate, aluminum alloy melt is slowly toppled over to outflow, through chute, in upper casting ladle, use glass cross bag filtration, with foam ceramic tile or pipe filter, add rare earth, then aluminum alloy melt enters the aluminium alloy continuous caster that lower casting ladle is comprised of the wheeled crystallizing wheel of H type and is cast into aluminium alloy cast ingot; Aluminium alloy pouring temperature is 705 ℃; Carry out again solutionizing processing, quenching, enter the novel combination type aluminium alloy tandem rolling unit that two rollers add three rollers and be rolled into aluminium alloy rod, the temperature of entering to roll of aluminium alloy cast ingot is controlled at 490 ℃, cooling and lubricating emulsion total pressure 0.2Mpa, the finishing temperature of aluminium alloy rod is controlled at 250~300 ℃, intensity aluminium gold bar in the Φ 9.5mm shutting out, carry out hot homogenizing processing, on sliding type aluminum alloy wire-drawing machine, controlling pull wire speed is 8~25 meter per seconds, pull into strength aluminium alloy product line in 59%IACS, line through scope at 5.0~2.0mm.Finally by middle strength aluminium alloy single line by after aging oven ageing treatment, sending into frame type stranding machine, to be twisted into electric conductivity be 59% middle strength aluminium alloy line finished product.
The Go-over mould tool of being furnished with the plurality of specifications such as 8.42,7.50,6.68,5.95,5.30,4.72,4.21,3.75,3.34,2.97 and 2.65 on sliding type aluminum alloy wire-drawing machine in the present invention, can draw out the aluminium alloy single line of corresponding wire diameter.Frame type stranding machine is provided with 1+6+12+18+24+30 twisted wire structure, and tension control is stable, disposable closely stranded by pretwist moulding.
In the 59%IACS that the present invention makes, strength aluminium alloy line has the tensile strength higher than aluminum steel, electric conductivity is higher than general aluminum alloy line simultaneously, can instead of steel core aluminum stranded wire, the requirement (electric conductivity reaches 59%IACS) of machinery, electric property can be reached, the transmitting line such as large leap can be applied to.
In all size 59% electric conductivity, the mechanical index of strength alloys line is as shown in table 1.
Table 1
In 59% electric conductivity, the electric index of strength alloys line is as shown in table 2.
From the data of table 1, table 2, by the electric conductivity of the middle strength aluminium alloy line of method manufacture of the present invention, reach 59%IACS, tensile strength >=230MPa, is middle strength aluminium alloy line.

Claims (2)

1. a manufacture method for the middle strength aluminium alloy line that electric conductivity is 59%IACS, is characterized in that: comprise the following steps:
A, prepare aluminium liquid
Select the weight percentage of impurity to be: silicon≤0.08%, iron≤0.16%, copper≤0.01%, titanium+vanadium+chromium+manganese≤0.015%, the aluminium ingot of other impurity≤0.03%, as raw material, is put into shaft furnace and is fused into aluminium liquid;
B, molten alloy liquid
Aluminium liquid is proceeded in the kettle furnace of automatic temperature controlling, and quantitatively add aluminium-silicon ingots, the melting together with magnesium ingot of aluminum-copper alloy ingot in holding furnace, refine into aluminum alloy melt; By high-speed light spectrometer, carry out stokehold rapid detection therebetween, the weight percentage of controlling the Its Related Elements in aluminum alloy melt is: silicon 0.40~0.55%, magnesium 0.35~0.50%, copper 0.020~0.040%;
C, cast aluminum alloys ingot casting
After aluminum alloy melt in holding furnace is processed with crystal grain thinning after filtration, send into aluminium alloy continuous caster and cast, form aluminium alloy cast ingot;
Strength aluminium alloy bar in D, rolling
After aluminium alloy cast ingot is carried out to solutionizing processing and quenches, send into aluminium alloy tandem rolling unit and be rolled into middle strength aluminium alloy bar;
Strength aluminium alloy single line in E, drawing
Centering strength aluminium alloy bar carries out after hot homogenizing processing, sends into aluminum alloy wire-drawing machine and is drawn into middle strength aluminium alloy single line;
F, to be twisted into electric conductivity be 59% middle strength aluminium alloy line finished product
Middle strength aluminium alloy single line is undertaken after ageing treatment by aging oven, and sending into frame type stranding machine, to be twisted into electric conductivity be 59% middle strength aluminium alloy line finished product;
The temperature of the solutionizing processing described in step D is controlled at 200~240 ℃;
The temperature of the hot homogenizing processing described in step e is controlled at 200 ℃~220 ℃, and the time is controlled at 5~6 hours;
Aluminium alloy tandem rolling unit described in step D is the Combined aluminum alloy tandem rolling unit that two rollers add three rollers, in the operation of rolling, enters to roll temperature and is controlled at 480~520 ℃, and finishing temperature is controlled at 250~300 ℃;
The pull wire speed of the aluminum alloy wire-drawing machine described in step e is controlled at 8~25 meter per seconds.
2. the manufacture method of the middle strength aluminium alloy line that electric conductivity as claimed in claim 1 is 59%IACS, is characterized in that: the aluminium alloy continuous caster described in step C adopts the wheeled crystallizing wheel of H type.
CN201010520544.2A 2010-10-26 2010-10-26 Manufacture method of medium-strength aluminum alloy wire with electrical conductivity of 59 percent CN102453819B (en)

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CN103545010B (en) * 2012-07-12 2016-08-10 青岛汉缆股份有限公司 Non-aged aluminum alloy wire and manufacture method thereof
WO2014057738A1 (en) * 2012-10-11 2014-04-17 株式会社Uacj Plate-like conductor for bus bar, and bus bar comprising same
JP5954099B2 (en) 2012-10-12 2016-07-20 日本軽金属株式会社 Aluminum alloy sheet for battery cases with excellent formability, heat dissipation and weldability
CN104307919B (en) * 2013-02-27 2016-08-31 国家电网公司 The preparation method of the bus with high-quality aluminium ingot as raw material
CN104438425B (en) * 2013-02-27 2017-02-08 国网山东省电力公司菏泽供电公司 Method for preparing buses for electrical engineering through taking high-quality aluminum ingots as raw material
CN103887016A (en) * 2014-03-04 2014-06-25 安徽海纳电缆集团有限公司 Processing technology of aluminium alloy for cable conductor
CN104878259B (en) * 2015-05-26 2017-06-30 安徽电气集团股份有限公司 A kind of middle strength aluminium alloy bar and preparation method thereof
CN104962783B (en) * 2015-05-26 2017-06-30 安徽电气集团股份有限公司 Strength aluminium alloy bar and preparation method thereof in a kind of cable use
CN106782843A (en) * 2016-11-30 2017-05-31 安徽电气集团股份有限公司 A kind of copper-clad steel core copper stranded conductor
CN106782742A (en) * 2016-11-30 2017-05-31 安徽电气集团股份有限公司 A kind of albronze twisted wire
CN107841658B (en) * 2017-09-30 2019-12-03 昆明理工大学 A kind of aluminium base conducting wire of high strength and high conductivity rate and preparation method thereof

Citations (1)

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Publication number Priority date Publication date Assignee Title
CN101200783A (en) * 2006-12-11 2008-06-18 上海中天铝线有限公司 Method for manufacturing high-strength aluminium-magnesium-slicon alloy wire

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101200783A (en) * 2006-12-11 2008-06-18 上海中天铝线有限公司 Method for manufacturing high-strength aluminium-magnesium-slicon alloy wire

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Patentee before: Shanghai Zhongtian Aluminium Wire Co., Ltd.

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