CN103498084A - Novel high-strength high-conductivity aluminium-alloy conductor and production method thereof - Google Patents
Novel high-strength high-conductivity aluminium-alloy conductor and production method thereof Download PDFInfo
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- CN103498084A CN103498084A CN201310481439.6A CN201310481439A CN103498084A CN 103498084 A CN103498084 A CN 103498084A CN 201310481439 A CN201310481439 A CN 201310481439A CN 103498084 A CN103498084 A CN 103498084A
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Abstract
The invention discloses a novel high-strength high-conductivity aluminium-alloy conductor and a production method thereof. The novel high-strength high-conductivity aluminium-alloy conductor comprises, by weight, 0.45-0.9% of Mg, 0.2-0.6% of Si, 0.1-1% of Re, 0.01-0.1% of B and the balance aluminum. Appropriate amounts of boron and rare earth are added into the Al-Mg-Si alloy, so that electrical conductivity of the alloy is improved on the premise of guaranteeing high strength of the alloy.
Description
Technical field
The present invention relates to a kind of aluminium alloy, particularly relate to the high aluminium alloy conductor and preparation method thereof of leading of a kind of novel high-strength.
Background technology
The conductor material of overhead transmission line, except good electroconductibility will be arranged, also will have certain intensity with the weight of supporting himself and external natural load-carrying.Aluminium alloy conductor has the advantages such as electroconductibility is good, density is little, low price, can meet the requirement of large capacity, long distance power transmission, very extensive in the power industry application.And, when high-strength, the height of research is led aluminum-alloy conductor material, usually following problems may be encountered: improved the tensile strength of aluminium bar, its specific conductivity and elongation can descend, and, when specific conductivity and elongation raising, intensity can reduce again.The aldural wire of current domestic use is mainly Al-Mg-Si line aluminium alloy wire.But Al-Mg-Si line aluminium alloy wire intensity is high, and electroconductibility is lower.
Summary of the invention
The object of the present invention is to provide the high aluminium alloy conductor and preparation method thereof of leading of a kind of novel high-strength, by add appropriate boron and rare earth in the Al-Mg-Si alloy, improve its electroconductibility under the prerequisite that guarantees alloy high strength.
The high aluminium alloy conductor of leading of a kind of novel high-strength, its component and weight percentage are: Mg: 0.45 ~ 0.9%, Si:0.2 ~ 0.6%, Re:0.1% ~ 1%, B:0.01% ~ 0.1%, all the other are aluminium.
As preferably, described Re is mishmetal, and its composition and quality percentage composition are: Ce:10 ~ 40%; La:40 ~ 70%; Other is 0 ~ 20% years old.
The high preparation method who leads aluminium alloy conductor of a kind of novel high-strength, comprise the steps:
The first step, prepare;
1) pre-treatment step;
2) preheating; By pure magnesium, Al-Si, Al-Re, Al-B master alloy preheating 20 ~ 60min at 150 ~ 250 ℃ of temperature in drying baker; Adopt metal type dies, mould and commercial-purity aluminium be 250 ℃ of preheatings in resistance furnace;
Second step, melting;
1) plumbago crucible is placed in to resistance furnace, is warming up to 400 ℃, add commercial-purity aluminium;
2) be warming up to 720 ℃, after fine aluminium all melts, take the bath surface oxidation sludge off;
3) be warming up to 750 ℃, add preheated pure magnesium and Al-Si master alloy, and be incubated 30 ~ 50min, during every 10min stir once.Add subsequently preheated Al-Re and Al-B master alloy, and be incubated 30 ~ 50min, during every 10min stir once;
4) be cooled to 720 ℃, take out crucible, pass into dry argon gas to melt refining 3 ~ 5min;
5) crucible is put into to resistance furnace, standing 10min, remove the oxide compound of bath surface, is cast in preheated metal die;
The 3rd step, extruding and drawing;
1) on extrusion machine, the Al-Mg-Si-Re-B alloy is pushed;
2) alloy bar after pushing, on drawing wire machine, be drawn into the aluminum alloy line of diameter 5mm; Then carry out process annealing, 300 ~ 450 ℃ of annealing temperatures, time 50 ~ 100min, to eliminate work hardening, recover alloy plasticity; Be drawn into again the aluminium alloy conductor of diameter 3mm.
As preferably, in described the 3rd step, extrusion temperature is 420 ~ 480 ℃, and it is 2 ~ 3.5m/min that metal flow goes out nib speed.
As preferably, in described the 3rd step, internal diameter of the container is 58mm, and blank diameter is 56mm; Diameter after extruding is 10mm.
As preferably, described pre-treatment step is: by mould inner wall, skim and refining toolrust-removal coat aluminum oxide coating; Furnace charge except deoiling, water and oxide on surface.
Beneficial effect of the present invention is:
1, the present invention adds Re in the Al-Mg-Si alloy.Rare earth can change existence form and the distribution of Si and impurity element in aluminium alloy, thereby improves its conductivity.
2, the present invention adds B in the Al-Mg-Si alloy.Boron reacts with micro impurity element V, Cr in aluminium alloy, Mn etc., they is changed into by the solid solution state and separate out state, and be deposited on the melt bottom, thereby purify melt, improves its electroconductibility.Simultaneously adding of boron can also crystal grain thinning, improves mechanical property.
Embodiment
Below in conjunction with embodiment, the invention will be further described:
Embodiment 1: take the Al-0.45Mg-0.2Si-0.1Re-0.01B alloy as example
The first step, prepare:
1) adopt metal type dies, diameter is 56mm.With Al (OH)
3, water, Starso is mixed with aluminum oxide coating, proportioning is: 3:1:200.Mould inner wall, skim and refining toolrust-removal coat aluminum oxide coating; Furnace charge should be except deoiling, the oxide compound on water and surface etc.
2) preheating; Alloy preheating: by pure magnesium, Al-20Si, Al-10Re, Al-3B master alloy preheating 20min at 150 ℃ of temperature in drying baker; Adopt metal type dies, mould and commercial-purity aluminium be 250 ℃ of preheatings in resistance furnace;
Select the Al-20Si master alloy, its composition is: Si:20%, and Al:80%, consumption is charging weight 1%;
Select the Al-10Re master alloy, its composition is: Al:90%, and Re:10%, consumption is charging weight 1%; Described Re is mishmetal, and its composition and quality percentage composition are: Ce:10%; La:70%; Other is 20% years old.
Select the Al-3B master alloy, its composition is: Al:97%, and B:3%, consumption is charging weight 0.33%;
3) prepare crucible: first molten more than 8 hours with flux, if do not leak, be used for the melting aluminum alloy.
Second step, melting;
1) plumbago crucible is placed in to resistance furnace, is warming up to 400 ℃, add commercial-purity aluminium;
2) be warming up to 720 ℃, after fine aluminium all melts, take the bath surface oxidation sludge off;
3) be warming up to 750 ℃, preheated pure magnesium and Al-20Si master alloy added to aluminium liquid in 0.45% and 1% ratio respectively, and insulation 30min, during every 10min stir once.Subsequently preheated Al-10Re and Al-3B master alloy are added to aluminium liquid in 1% and 0.67% ratio respectively,, and insulation 30min, during every 10min stir once;
4) be cooled to 720 ℃, take out crucible, pass into dry argon gas to melt refining 3min;
5) crucible is put into to resistance furnace, standing 10min, remove the oxide compound of bath surface, is cast in preheated metal die.During casting, cast gate is as far as possible near the mould mouth, and casting should be steady, avoids eddy current and splashes;
The 3rd step, extruding and drawing;
1) adopt vertical extruder to be pushed the Al-Mg-Si-Re-B alloy.Internal diameter of the container is 58mm, and blank diameter is 56mm.Diameter after extruding is 10mm.Extrusion temperature is 420 ℃.It is 2m/min that metal flow goes out nib speed;
2) alloy bar after pushing, on the drawing silk, be drawn into the aluminum alloy line of diameter 5mm.Then carry out process annealing, 300 ℃ of temperature, time 50min, to eliminate work hardening, recover alloy plasticity.Be drawn into again the aluminium alloy conductor of diameter 3mm.
After testing, its specific conductivity is 56%, and tensile strength is 288MPa, intensity survival rate 65.8%.
Embodiment 2: take the Al-0.9Mg-0.6Si-1Re-0.1B alloy as example
The alloy preheating temperature is 250 ℃, time 60min.The additional proportion of pure magnesium and Al-20Si master alloy is respectively 0.9% and 3%, and soaking time is 50min; The additional proportion of Al-10Re and Al-3B master alloy is respectively 10% and 3.3%, and soaking time is 50min, and described Re is mishmetal, and its composition and quality percentage composition are: Ce:30%; La:60%; Other is 10% years old.Refining time is 5min.Extrusion temperature is 480 ℃.It is 3.5m/min that metal flow goes out nib speed.Annealing temperature is 450 ℃, time 100min.All the other preparations, melting and extruding and drawing complete processing are with embodiment 1.
After testing, its specific conductivity is 57.1%, and tensile strength is 208MPa, intensity survival rate 67.8%.
Embodiment 3: take the Al-0.6Mg-0.4Si-0.3Re-0.02B alloy as example
The alloy preheating temperature is 180 ℃, time 50min.The additional proportion of pure magnesium and Al-20Si master alloy is respectively 0.6% and 2%, and soaking time is 40min; The additional proportion of Al-10Re and Al-3B master alloy is respectively 3% and 0.67%, and soaking time is 40min, and described Re is mishmetal, and its composition and quality percentage composition are: Ce:40%; La:60%.Refining time is 4min.Extrusion temperature is 450 ℃.It is 2.5m/min that metal flow goes out nib speed; Annealing temperature is 370 ℃, time 70min.All the other preparations, melting and extruding and drawing complete processing are with embodiment 1.
After testing, its specific conductivity is 59.5%, and tensile strength is 198MPa, intensity survival rate 69.8%.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, other modifications that those of ordinary skills make technical scheme of the present invention or be equal to replacement, only otherwise break away from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of claim scope of the present invention.
Claims (6)
1. the high aluminium alloy conductor of leading of novel high-strength, it is characterized in that: its component and weight percentage are: Mg: 0.45 ~ 0.9%, Si:0.2 ~ 0.6%, Re:0.1% ~ 1%, B:0.01% ~ 0.1%, all the other are aluminium.
2. the high aluminium alloy conductor of leading of a kind of novel high-strength according to claim 1, it is characterized in that: described Re is mishmetal, its composition and quality percentage composition are: Ce:10 ~ 40%; La:40 ~ 70%; Other is 0 ~ 20% years old.
3. the high preparation method who leads aluminium alloy conductor of a kind of novel high-strength according to claim 1 and 2, is characterized in that: comprise the steps:
The first step, prepare;
1) pre-treatment step;
2) preheating; By pure magnesium, Al-Si, Al-Re, Al-B master alloy preheating 20 ~ 60min at 150 ~ 250 ℃ of temperature in drying baker; Adopt metal type dies, mould and commercial-purity aluminium be 250 ℃ of preheatings in resistance furnace; Second step, melting;
1) plumbago crucible is placed in to resistance furnace, is warming up to 400 ℃, add commercial-purity aluminium;
2) be warming up to 720 ℃, after fine aluminium all melts, take the bath surface oxidation sludge off;
3) be warming up to 750 ℃, add preheated pure magnesium and Al-Si master alloy, and be incubated 30 ~ 50min, during every 10min stir once; Add subsequently preheated Al-Re and Al-B master alloy, and be incubated 30 ~ 50min, during every 10min stir once;
4) be cooled to 720 ℃, take out crucible, pass into dry argon gas to melt refining 3 ~ 5min;
5) crucible is put into to resistance furnace, standing 10min, remove the oxide compound of bath surface, is cast in preheated metal die;
The 3rd step, extruding and drawing;
1) on extrusion machine, the Al-Mg-Si-Re-B alloy is pushed;
2) alloy bar after pushing, on drawing wire machine, be drawn into the aluminum alloy line of diameter 5mm; Then carry out process annealing, 300 ~ 450 ℃ of annealing temperatures, time 50 ~ 100min, to eliminate work hardening, recover alloy plasticity; Be drawn into again the aluminium alloy conductor of diameter 3mm.
4. the high preparation method who leads aluminium alloy conductor of a kind of novel high-strength according to claim 3, it is characterized in that: in described the 3rd step, extrusion temperature is 420 ~ 480 ℃, and it is 2 ~ 3.5m/min that metal flow goes out nib speed.
5. the high preparation method who leads aluminium alloy conductor of a kind of novel high-strength according to claim 3, it is characterized in that: in described the 3rd step, internal diameter of the container is 58mm, and blank diameter is 56mm; Diameter after extruding is 10mm.
6. the high preparation method who leads aluminium alloy conductor of a kind of novel high-strength according to claim 3, it is characterized in that: described pre-treatment step is: by mould inner wall, skim and refining toolrust-removal coat aluminum oxide coating; Furnace charge except deoiling, water and oxide on surface.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105018801A (en) * | 2015-08-28 | 2015-11-04 | 河南胜华电缆集团有限公司 | High-strength, high-conductivity and heat-resistant aluminum alloy conductor and preparation method thereof |
| CN105624593A (en) * | 2015-11-26 | 2016-06-01 | 新疆众和股份有限公司 | Annealing method for aluminum-silicon system alloy rod used for welding |
| CN107868893A (en) * | 2017-09-30 | 2018-04-03 | 昆明理工大学 | A kind of the aluminium base wire and preparation method of the high heat-resisting high conductivity of middle intensity |
| CN108977704A (en) * | 2018-06-22 | 2018-12-11 | 广西南南铝加工有限公司 | A kind of preparation method of the aluminium alloy of high-strength highly-conductive containing La-B and its cut deal |
| CN111500899A (en) * | 2020-04-23 | 2020-08-07 | 江苏常铝铝业集团股份有限公司 | Aluminum material containing rare earth elements for explosion-proof membrane and manufacturing method thereof |
| CN113265555A (en) * | 2021-05-18 | 2021-08-17 | 宁夏大学 | Method for preparing high-strength high-conductivity heat-resistant aluminum conductor from waste aluminum alloy |
| CN116657004A (en) * | 2023-07-25 | 2023-08-29 | 宁德时代新能源科技股份有限公司 | Aluminum alloy for battery busbar, preparation method, application, battery device and equipment |
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| CN1616696A (en) * | 2004-12-03 | 2005-05-18 | 云南冶金集团总公司 | High conductivity aluminium base material containing rare-earth and boron and preparing method |
| CN101121978A (en) * | 2007-09-29 | 2008-02-13 | 深圳市富亿通精密科技有限公司 | High electric-conductivity heat-conductivity high-strength aluminum alloy material, preparation method and application thereof |
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| CN1616696A (en) * | 2004-12-03 | 2005-05-18 | 云南冶金集团总公司 | High conductivity aluminium base material containing rare-earth and boron and preparing method |
| CN101121978A (en) * | 2007-09-29 | 2008-02-13 | 深圳市富亿通精密科技有限公司 | High electric-conductivity heat-conductivity high-strength aluminum alloy material, preparation method and application thereof |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105018801A (en) * | 2015-08-28 | 2015-11-04 | 河南胜华电缆集团有限公司 | High-strength, high-conductivity and heat-resistant aluminum alloy conductor and preparation method thereof |
| CN105018801B (en) * | 2015-08-28 | 2017-02-01 | 河南胜华电缆集团有限公司 | High-strength, high-conductivity and heat-resistant aluminum alloy conductor and preparation method thereof |
| CN105624593A (en) * | 2015-11-26 | 2016-06-01 | 新疆众和股份有限公司 | Annealing method for aluminum-silicon system alloy rod used for welding |
| CN107868893A (en) * | 2017-09-30 | 2018-04-03 | 昆明理工大学 | A kind of the aluminium base wire and preparation method of the high heat-resisting high conductivity of middle intensity |
| CN108977704A (en) * | 2018-06-22 | 2018-12-11 | 广西南南铝加工有限公司 | A kind of preparation method of the aluminium alloy of high-strength highly-conductive containing La-B and its cut deal |
| CN108977704B (en) * | 2018-06-22 | 2021-06-29 | 广西南南铝加工有限公司 | La-B-containing high-strength high-conductivity aluminum alloy and preparation method of medium plate thereof |
| CN111500899A (en) * | 2020-04-23 | 2020-08-07 | 江苏常铝铝业集团股份有限公司 | Aluminum material containing rare earth elements for explosion-proof membrane and manufacturing method thereof |
| CN111500899B (en) * | 2020-04-23 | 2022-03-04 | 江苏常铝铝业集团股份有限公司 | Aluminum material containing rare earth elements for explosion-proof membrane and manufacturing method thereof |
| CN113265555A (en) * | 2021-05-18 | 2021-08-17 | 宁夏大学 | Method for preparing high-strength high-conductivity heat-resistant aluminum conductor from waste aluminum alloy |
| CN113265555B (en) * | 2021-05-18 | 2022-03-11 | 宁夏大学 | Method for preparing high-strength high-conductivity heat-resistant aluminum conductor from waste aluminum alloy |
| CN116657004A (en) * | 2023-07-25 | 2023-08-29 | 宁德时代新能源科技股份有限公司 | Aluminum alloy for battery busbar, preparation method, application, battery device and equipment |
| CN116657004B (en) * | 2023-07-25 | 2024-01-05 | 宁德时代新能源科技股份有限公司 | Aluminum alloy for battery busbar, preparation method, application, battery device and equipment |
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Inventor after: Liu Junying Inventor after: Deer dust Inventor after: Wang Yi Inventor after: Shao Xia Inventor after: Liu Xiyong Inventor after: Zhao Hongliang Inventor after: Li Jing Inventor after: Zhao Xiaoyan Inventor after: Guo Guoli Inventor after: Zhu Yan Inventor before: Liu Junying Inventor before: Shao Xia Inventor before: Liu Xiyong Inventor before: Zhao Hongliang Inventor before: Li Jing Inventor before: Zhao Xiaoyan Inventor before: Guo Guoli Inventor before: Zhu Yan Inventor before: Deer dust |
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