CN100500903C - Production of high-strength heat-resisting aluminum-alloy overhead transmission connecting wire - Google Patents
Production of high-strength heat-resisting aluminum-alloy overhead transmission connecting wire Download PDFInfo
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- CN100500903C CN100500903C CNB2007100278271A CN200710027827A CN100500903C CN 100500903 C CN100500903 C CN 100500903C CN B2007100278271 A CNB2007100278271 A CN B2007100278271A CN 200710027827 A CN200710027827 A CN 200710027827A CN 100500903 C CN100500903 C CN 100500903C
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Abstract
Production of high-strength and heat-resisting aluminum-alloy overhead power-transmission line for large-span power-transmission variable line is carried out by selecting standard aluminum bobbin, melting in smelting furnace, adding into zirconium, copper, iron and yttrium as alloy adding elements, agitating, refining to remove air, slagging, eliminating slag, covering aluminum-alloy liquid surface by solid recovering agent, laying aside for 45-60 mins, on-the-spot sample analyzing, monitoring, adjusting, continuously pouring by aluminum-liquid flowing channel, secondary refining machine and aluminum-slag filter to form into aluminum-alloy cast strips, entering into continuous crusher to form into aluminum-alloy rod, drawing to obtain high-strength and heat-resisting aluminum-alloy circular line by high-speed drawing machine, thermal refine treating in heat-treatment furnace, cooling to room-temperature and twisting. It costs low, has less line consumption and better power-transmission quality.
Description
Technical field
The present invention relates to the manufacturing and the applied technical field of electrician's novel material, specifically be meant a kind of production of high-strength heat-resisting aluminum-alloy overhead transmission connecting wire.
Background technology
Along with the high speed development of Chinese national economy, the construction of power industry presents the trend of advancing by leaps and bounds, and makes transmitting line to high-pressure trend, high capacity, the development of long distance ionization aspect and extension.Simultaneously, also overhead transmission line is had higher requirement.The high strength Al-Si-Mg alloy lead wire of only use previous exploitation, using can not satisfy the strategic plan of country's " transferring electricity from the west to the east, north and south supply mutually, national network ", and the construction of remote, large vol, ultra-high voltage grade overhead transmission line is imperative.
2005, national 973 planning items---Three Gorges power transmission engineering was crossed in the harness research with big, and six leap the Changjiang river and Han River big leap lead engineering that Gorges power network is sent that engineering is about to build up have proposed new demand.In order to increase power transmission capacity effectively, need to substitute high strength Al-Si-Mg alloy lead wire commonly used with the high-strength heat-resisting aluminum-alloy lead, wherein high-strength heat-resisting aluminum-alloy lead the key technical indexes is: electric conductivity is not less than 52.5%, tensile strength is not less than 250MPa, and resistance toheat is not less than 150 ℃ (are example with high-strength heat-resisting aluminum-alloy line diameter 4.63mm).
In China, along with the high speed development of national economy, power industry, the phenomenon that ability to transmit electricity does not satisfy urban development can be found everywhere.These cities and area all will become the restriction of Economic development because of the growth of electricity needs, install new line cost very high, do not have time enough and land used to set up new line yet, many cities and geographic development also limit the change circuit, and on original circuit, adopt heat-resisting aluminium alloy series lead to replace old line, its capacity multiplication, and can keep the original environment that sets up of circuit.
Because this lead life-time service temperature can reach 150 ℃, also be suitable for serious ice-covering area anti-ice coating wire.NORTHWEST CHINA area icing in winter is serious, and transmission pressure bears bigger ice and snow load, all can cause down bar, broken string accident every year, can only come ice-melt snow with the increasing electric current at present, cause a large amount of losses of the energy, and the ice-melt effect is also undesirable.But hardship with the deicing of high-strength heat-resisting aluminum-alloy lead.The sixties in last century Japan according to national ground less, populous, the characteristics of laying geography such as new line difficulty and national conditions, dropped into a large amount of manpowers, financial resources take the lead in carrying out the research of heat-resisting aluminium alloy, and develop that tensile strength is that 225Mpa, minimum elongation rate are 1.5%, electric conductivity is that 55%IACS, intensity remainingly are 90%, the life-time service temperature is 150 ℃ high-strength heat-resisting aluminum-alloy lead (is example with high-strength heat-resisting aluminum-alloy line diameter 4.63mm).
Last century late nineteen eighties, Wuhan cable factory is under the versatility of Shanghai Electrical Cable Research Institute is supported, manufactured experimently high-strength heat-resisting aluminum-alloy, wherein the key technical indexes is: tensile strength is that 225Mpa, minimum elongation rate are 1.5%, electric conductivity is that 55%IACS, intensity remainingly are 90%, the life-time service temperature is 150 ℃ (are example with high-strength heat-resisting aluminum-alloy line diameter 4.63mm), and is similar with Japanese like product fundamental property.Meanwhile, Zhejiang Hangzhou cable factory, Shanghai aluminum steel factory also sent the needs of engineering in 2005 according to Gorges power network, and novel high-strength heat-resisting aluminum-alloy lead is studied, manufactured experimently.But the tensile strength of final lead fails to reach 250MPa.
At present, the state of the art of domestic manufacturing high-strength heat-resisting aluminum-alloy lead (is example with high-strength heat-resisting aluminum-alloy line diameter 4.63mm), its mechanical, electrical performance index are: tensile strength is 225MPa, the minimum elongation rate is 1.5%, electric conductivity is that 55%IACS, intensity remainingly are 90%, the life-time service temperature is 150 ℃, and the tensile strength of this heat-resisting high-strength aluminium alloy wire can not be satisfied with design, the service requirements of the big leap electric transmission and distribution circuit of China.
Summary of the invention
The present invention provides a kind of can producing and is applicable to the design of big leap electric transmission and distribution circuit, service requirements promptly: tensile strength is that 255Mpa, minimum elongation rate are 2.0%, electric conductivity is that 55%IACS, intensity remainingly are 90%, the life-time service temperature is 150 ℃, production of high-strength heat-resisting aluminum-alloy overhead transmission connecting wire.
For achieving the above object, technical scheme provided by the invention is: the concrete operations step of this method is:
Choose the standard aluminium ingot of 99.7% purity, content is no more than 0.02% weight percentage except its impurity silica removal, iron, the copper;
Putting into molten aluminium stove melts, add the zirconium of 0.05～0.20% weight percentage, 0.10～0.40% copper, 0.15～0.90% iron, and 0.05～0.4% yttrium is as the interpolation element of alloying, the alloying temperature is 725～750 ℃, to be the heat-insulating integral stove adopt integrated operation to melting, insulation, the alloying of high-strength heat-resisting aluminum-alloy to smelting furnace, not only improved production efficiency but also saved the energy, the more important thing is that incorporate operating in eliminated the most scabrous stable and uniform problem in the aluminium alloy smelting process to the full extent.
Through stirring, refining degasification, slag making, slagging-off, the temperature of aluminum alloy melt is 725～750 ℃ in its stove, covers the aluminum alloy melt surface with the solid insulating covering agent, and leaves standstill 45～60 minutes; Utilize photo-electric direct reading spectrometer to carry out stokehold Chemical Composition real-time analysis, monitoring, adjustment are with control element content.
Through aluminium spout, external refining machine, aluminium slag strumbox, go into the continuous caster continuous casting, the temperature of removing aluminum alloy melt in the steam stove is 725～750 ℃, the continuous filtration of aluminium slag strumbox, go into the continuous caster continuous casting, become the aluminium alloy cast bar, the temperature of continuous casting aluminum alloy melt is 700～760 ℃, and crystallization water coolant total pressure is 0.15～0.50Mpa.
The aluminium alloy cast bar that continuous casting becomes, advance the tandem rolling unit and roll into aluminium alloy rod continuously, in the operation of rolling of aluminium alloy rod, very sensitive to temperature factor, to advance to roll temperature, in roll temperature, go out to roll temperature strict requirement is all arranged, therefore, the present invention will advance to roll temperature and be made as 450～530 ℃, and continuous mill cooling and lubricating emulsion total pressure is that 0.20～0.30MPa, temperature are 25～45 ℃; The temperature that goes out to roll of aluminium alloy rod is 100～350 ℃.
On continuous, high speed drawing machine, its pull wire speed is 20 meter per seconds, by reasonably joining mould, through continuously, the high speed multiple tracks draws, and is drawn into required high-strength heat-resisting aluminum-alloy circle line, guarantees the needs of the progress of producing in batches.
High-strength heat-resisting aluminum-alloy circle line carries out modified thermal treatment in the heat treatment furnace of special use, in the stove temperature difference be not more than ± 5 ℃, thermal treatment temp is 140～280 ℃, and heat treatment time is 120～240 minutes, and thermal treatment postcooling to room temperature is promptly finished the manufacturing of high-strength heat-resisting aluminum-alloy circle line.
Thermal treatment postcooling to room temperature is finished the manufacturing of high-strength heat-resisting aluminum-alloy circle line, twists system on wire twisting machine, and through back twist stress-removal device, lead meets product design, service requirements at stringing not broken lot, pine strand when guaranteeing the strand system.
Heat-resisting high-strength aluminium according to the inventive method manufacturing closes overhead power transmission conducting wire, and the index of its mechanical, electrical performance is: electric conductivity is not less than 55%IACS, and tensile strength is not less than 255MPa, and long-term heat resisting temperature is 150 ℃.Can not only satisfy the big leap design requirements of striding river, river in several the Three Gorges of building, can come into operation, directly be transmitting electricity from west to east construction service, can break away from the situation that the big leap transmission pressure of China mainly relies on import, will be for country save a large amount of foreign exchanges, and can satisfy the needs that transform in city, area power grid, reduce circuit consumption thereby can reach, improve the transmission of electricity quality, reduce fixed investment and maintenance cost.
China is being faced with simultaneously, and energy-output ratio is big, shortage of resources, the situation that the copper valency is high.High-strength heat-resisting aluminum-alloy also can be made into lenticular wire, and the instead of copper lenticular wire is used for motor winding wire, can more effectively save social resources, reduces production costs.
The aluminum profile extrusion industrialized scale in current Guangdong Province is bigger, but the major part that relates to is the building trade aluminium, and the application of alloy product also is confined to traditional mechanical processing industry substantially.And the high-strength heat-resisting aluminum-alloy lead of the present invention research and development is a kind of high performance functional products, towards be the electric power network industry that state key is built, its prospect of applying is very wide, and is significant.Along with industrialized implementation of the present invention will have immeasurable exemplary role to the adjustment of Guangdong Province's aluminum profile extrusion industrial structure.
Description of drawings:
Fig. 1 is a manufacture method schema of the present invention.
Embodiment:
Shown in accompanying drawing 1, high-strength heat-resisting aluminum-alloy overhead transmission connecting wire with the line diameter 4.63mm among the manufacturing JGQNRLH/G3A-800/70 is an example: the standard aluminium ingot of selecting 99.7% purity, its foreign matter content (except silicon, iron, the copper) is no more than 0.02% weight percentage, put into molten aluminium stove and melt, add the zirconium of 0.05～0.20% weight percentage, 0.10～0.40% copper, 0.15～0.90% iron.And 0.05～0.4% yttrium is as the element of alloying, the alloying temperature is advisable with 725～750 ℃, is 725～750 ℃ through homogenizing stirring, refining degasification, aluminum alloy melt refining temperature, slag making, slagging-off, cover the aluminum alloy melt surface with the solid insulating covering agent, left standstill 45～60 minutes; Carry out stokehold chemical ingredients real-time analysis, monitoring, adjustment are with control element content; Through aluminium spout, external refining machine, aluminium slag strumbox, go into the continuous caster continuous casting, the continuous caster that employing is made up of wheeled copper crystallizing wheel, the temperature of continuous casting aluminum alloy melt is 700～760 ℃ and new subregion casting process for cooling, reasonably adjust casting cooling orientation, crystallization water coolant total pressure is 0.15～0.50Mpa, guaranteed homogeneously crystallized in casting cycle, the cooling of aluminium alloy cast ingot, the reduction aluminum alloy ingot because of segregation phenomena that the temperature difference is brought, is cast qualified aluminium alloy cast bar in casting cycle.The aluminium alloy cast bar that continuous casting becomes, advance that (preceding two frames are two rod formulas by 14 frames, 12 frames in back are Y type three rod open frames) the tandem rolling unit formed rolls into the aluminium alloy rod that diameter is 9.5mm continuously, it is 450～530 ℃ that the aluminium alloy cast bar advances to roll temperature, continuous mill cooling and lubricating emulsion total pressure is 0.20～0.30MPa, temperature is 25～45 ℃, going out to roll temperature the end of aluminium alloy rod is 100～350 ℃, continuously, on the high speed drawing machine, pull wire speed is 20 meter per seconds, through the drawing of multi-pass, be drawn into required high-strength heat-resisting aluminum-alloy circle line.In the heat treatment furnace of special use, carry out modified thermal treatment, in the stove temperature difference be not more than ± 5 ℃, thermal treatment temp is controlled at 140～280 ℃, heat treatment time was controlled at 120～240 minutes, thermal treatment postcooling to room temperature is finished the manufacturing of high-strength heat-resisting aluminum-alloy circle line.Twist system on 630 type wire twisting machines, through back twist stress-removal device, lead meets product design, service requirements at stringing not broken lot, pine strand when guaranteeing the strand system.
Claims (1)
1, production of high-strength heat-resisting aluminum-alloy overhead transmission connecting wire is characterized in that: the concrete operations step of this method is:
Choose the standard aluminium ingot of 99.7% purity, the foreign matter content outside its silica removal, iron, the copper is no more than 0.02% weight percentage;
Put into molten aluminium stove and melt, add zirconium, 0.10～0.40% copper, 0.15～0.90% the iron of 0.05～0.20% weight percentage and 0.05～0.4% the yttrium element as alloying, the alloying temperature is 725～750 ℃:
Through homogenizing stirring, refining degasification, slag making, slagging-off, the aluminum alloy melt refining temperature is 725～750 ℃, covers the aluminum alloy melt surface with the solid insulating covering agent, leaves standstill 45～60 minutes, carries out stokehold chemical ingredients real-time analysis, and monitoring, adjustment are with control element content;
Through aluminium spout, external refining machine, aluminium slag strumbox, go into the continuous caster continuous casting, the temperature of removing aluminum alloy melt in the steam stove is 725～750 ℃, the continuous filtration of aluminium slag strumbox, go into the continuous caster continuous casting, become the aluminium alloy cast bar, the temperature of continuous casting aluminum alloy melt is 700～760 ℃, and crystallization water coolant total pressure is 0.15～0.50Mpa;
The aluminium alloy cast bar that continuous casting becomes, advance the tandem rolling unit and roll into aluminium alloy rod continuously, it is 450～530 ℃ that the aluminium alloy cast bar advances to roll temperature, and continuous mill cooling and lubricating emulsion total pressure is that 0.20～0.30MPa, temperature are 25～45 ℃, and the finishing temperature of aluminium alloy rod is 100～350 ℃;
On continuous, high speed drawing machine, pull wire speed is 20 meter per seconds, by reasonably joining mould, through the drawing of multi-pass, is drawn into required high-strength heat-resisting aluminum-alloy circle line;
In heat treatment furnace, carry out modified thermal treatment, in the stove temperature difference be not more than ± 5 ℃, thermal treatment temp is controlled at 140～280 ℃, heat treatment time was controlled at 120～240 minutes;
Thermal treatment postcooling to room temperature is finished the manufacturing of high-strength heat-resisting aluminum-alloy circle line, twists system on wire twisting machine, and through back twist stress-removal device, lead meets product design, service requirements at stringing not broken lot, pine strand when guaranteeing the strand system.
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| CNB2007100278271A CN100500903C (en) | 2007-04-30 | 2007-04-30 | Production of high-strength heat-resisting aluminum-alloy overhead transmission connecting wire |
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| CNB2007100278271A CN100500903C (en) | 2007-04-30 | 2007-04-30 | Production of high-strength heat-resisting aluminum-alloy overhead transmission connecting wire |
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| CN100500903C true CN100500903C (en) | 2009-06-17 |
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| CN102592747A (en) * | 2010-05-08 | 2012-07-18 | 深圳市神州线缆有限公司 | Method for producing copper-coated aluminum magnesium conductor wire for communication cable |
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| CN102011035A (en) * | 2010-12-04 | 2011-04-13 | 江苏南瑞淮胜电缆有限公司 | Heat-resistant all aluminum alloy conductor and manufacturing method thereof |
| CN102021444B (en) * | 2010-12-09 | 2012-08-22 | 北京科技大学 | High-conductive heat-resistant aluminium alloy conductor and preparation method thereof |
| CN102773275B (en) * | 2012-04-12 | 2015-07-01 | 广东双利电缆有限公司 | Novel aluminium alloy wire drawing unit |
| CN102978491B (en) * | 2012-12-24 | 2014-07-02 | 大明电缆有限公司 | High-conductivity aluminium alloy conductor material for cables and preparation method thereof |
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| CN105689658A (en) * | 2014-11-27 | 2016-06-22 | 潞安卓泰祥和金属科技宜兴有限公司 | Continuous casting machine |
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| CN106676300B (en) * | 2017-01-17 | 2018-07-17 | 云南铝业股份有限公司 | A kind of production technology of alloy round aluminum rod |
| CN110578074B (en) * | 2019-09-26 | 2022-01-14 | 无锡华能电缆有限公司 | Super heat-resistant aluminum alloy single wire and preparation method thereof |
| CN112481525A (en) * | 2020-11-10 | 2021-03-12 | 国网辽宁省电力有限公司营口供电公司 | Al-Cu-Sc-B heat-resistant aluminum alloy monofilament material and preparation method thereof |
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Owner name: GUANGDONG SHUANGLI CABLE CO., LTD. Free format text: FORMER NAME: XIONGLISHUANGLI CABLE CO., LTD., GUANGDONG |
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Address after: 528513 Guangdong province Gaoming District of Foshan City, Yang He Zhen Guangdong xiongli Shuangli Cable Co. Ltd. Patentee after: Guangdong Shuangli Cable Co., Ltd. Address before: 528513 Guangdong province Gaoming District of Foshan City, Yang He Zhen Guangdong xiongli Shuangli Cable Co. Ltd. Patentee before: Xionglishuangli Cable Co., Ltd., Guangdong |
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Granted publication date: 20090617 Termination date: 20160430 |