CN103498084B - A kind of preparation method of high-strength highly-conductive aluminium alloy conductor - Google Patents
A kind of preparation method of high-strength highly-conductive aluminium alloy conductor Download PDFInfo
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Abstract
The invention discloses a kind of preparation method of high-strength highly-conductive aluminium alloy conductor, do are its component and weight percentage: Mg?: 0.45 ~ 0.9%, Si:0.2 ~ 0.6%, Re:0.1% ~ 1%, B:0.01% ~ 0.1%, all the other are aluminium.The present invention, by adding appropriate boron and rare earth in Al-Mg-Si alloy, improves its electroconductibility under the prerequisite ensureing alloy high strength.
Description
Technical field
The present invention relates to a kind of aluminium alloy, particularly relate to a kind of preparation method of high-strength highly-conductive aluminium alloy conductor.
Background technology
The conductor material of overhead transmission line, except will having good electroconductibility, also will have certain intensity to support the weight of 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 Copacity, long distance power transmission, in power industry application widely.And when studying high-strength, height and leading aluminum-alloy conductor material, usually following problems may be encountered: the tensile strength that improve aluminium bar, and its specific conductivity and elongation can decline, and when specific conductivity and elongation raising, intensity can reduce again.The aldural wire mainly Al-Mg-Si-type aluminum alloy wire of current domestic use.But Al-Mg-Si-type aluminum alloy wire intensity is high, and electroconductibility is lower.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of high-strength highly-conductive aluminium alloy conductor, by adding appropriate boron and rare earth in Al-Mg-Si alloy, under the prerequisite ensureing alloy high strength, improving its electroconductibility.
A kind of high-strength highly-conductive aluminium alloy conductor, 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%, and all the other are aluminium.
As preferably, described Re is mishmetal, and its composition and mass percentage are: Ce:10 ~ 40%; La:40 ~ 70%; Other is 0 ~ 20% years old.
A preparation method for high-strength highly-conductive aluminium alloy conductor, comprises the steps:
The first step, prepares;
1) pre-treatment step;
2) preheating; By pure magnesium, Al-Si, Al-Re, Al-B master alloy preheating 20 ~ 60min at 150 ~ 250 DEG C of temperature in drying baker; Adopt metal type dies, mould and commercial-purity aluminium be 250 DEG C of preheatings in resistance furnace;
Second step, melting;
1) plumbago crucible is placed in resistance furnace, is warming up to 400 DEG C, adds commercial-purity aluminium;
2) be warming up to 720 DEG C, after fine aluminium all melts, take bath surface oxidation sludge off;
3) be warming up to 750 DEG C, add preheated pure magnesium and Al-Si master alloy, and be incubated 30 ~ 50min, period, every 10min stirred once.Add preheated Al-Re and Al-B master alloy subsequently, and be incubated 30 ~ 50min, period, every 10min stirred once;
4) be cooled to 720 DEG C, take out crucible, pass into dry argon gas to melt refining 3 ~ 5min;
5) crucible is put into resistance furnace, leave standstill 10min, the oxide compound of removing bath surface, is cast in preheated metal die;
3rd step, extruding and drawing;
1) on extrusion machine, Al-Mg-Si-Re-B alloy is extruded;
2) by the alloy bar after extruding, on drawing wire machine, the aluminum alloy line of diameter 5mm is drawn into; Then carry out process annealing, annealing temperature 300 ~ 450 DEG C, time 50 ~ 100min, to eliminate work hardening, recover alloy plasticity; Be drawn into the aluminium alloy conductor of diameter 3mm again.
As preferably, in described 3rd step, extrusion temperature is 420 ~ 480 DEG C, and it is 2 ~ 3.5m/min that metal flow goes out nib speed.
As preferably, in described 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 Al-Mg-Si alloy.Rare earth can change existence form and the distribution of Si and impurity element in aluminium alloy, thus improves its conductivity.
2, the present invention adds B in Al-Mg-Si alloy.The reactions such as micro impurity element V, Cr, Mn in boron and aluminium alloy, make them change precipitation state into by solid solution state, and are deposited on bottom melt, thus purification melt, improve 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: for Al-0.45Mg-0.2Si-0.1Re-0.01B alloy
The first step, prepares:
1) adopt metal type dies, diameter is 56mm.Be mixed with aluminum oxide coating with Al (OH) 3, water, Starso, proportioning is: 3:1:200.Mould inner wall, to skim and refining toolrust-removal coat aluminum oxide coating; Furnace charge should except deoiling, the oxide compound etc. on water and surface.
2) preheating; Alloy preheating: by pure magnesium, Al-20Si, Al-10Re, Al-3B master alloy preheating 20min at 150 DEG C of temperature in drying baker; Adopt metal type dies, mould and commercial-purity aluminium be 250 DEG C of preheatings in resistance furnace;
Select Al-20Si master alloy, its composition is: Si:20%, Al:80%, and consumption is 1% of charging weight;
Select Al-10Re master alloy, its composition is: Al:90%, Re:10%, and consumption is 1% of charging weight; Described Re is mishmetal, and its composition and mass percentage are: Ce:10%; La:70%; Other 20%,
Select Al-3B master alloy, its composition is: Al:97%, B:3%, and consumption is 0.33% of charging weight;
3) prepare crucible: first with flux molten more than 8 hours, if do not leaked, be used for melting aluminum alloy.
Second step, melting;
1) plumbago crucible is placed in resistance furnace, is warming up to 400 DEG C, adds commercial-purity aluminium;
2) be warming up to 720 DEG C, after fine aluminium all melts, take bath surface oxidation sludge off;
3) be warming up to 750 DEG C, preheated pure magnesium and Al-20Si master alloy added aluminium liquid in the ratio of 0.45% and 1% respectively, and is incubated 30min, period, every 10min stirred once.Subsequently preheated Al-10Re and Al-3B master alloy is added aluminium liquid in the ratio of 1% and 0.67% respectively, and be incubated 30min, period, every 10min stirred once;
4) be cooled to 720 DEG C, take out crucible, pass into dry argon gas to melt refining 3min;
5) crucible is put into resistance furnace, leave standstill 10min, the oxide compound of removing bath surface, is cast in preheated metal die.During casting, cast gate is as far as possible near mould mouth, and casting should be steady, avoids eddy current and splashing;
3rd step, extruding and drawing;
1) vertical extruder is adopted to extrude 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 DEG C.It is 2m/min that metal flow goes out nib speed;
2) by the alloy bar after extruding, on drawing silk, the aluminum alloy line of diameter 5mm is drawn into.Then carry out process annealing, temperature 300 DEG C, time 50min, to eliminate work hardening, recover alloy plasticity.Be drawn into the aluminium alloy conductor of diameter 3mm again.
After testing, its specific conductivity is 56%, and tensile strength is 288MPa, intensity survival rate 65.8%.
Embodiment 2: for Al-0.9Mg-0.6Si-1Re-0.1B alloy
Alloy preheating temperature is 250 DEG C, 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.Described Re is mishmetal, and its composition and mass percentage are: Ce:30%; La:60%; Other is 10% years old; Refining time is 5min.Extrusion temperature is 480 DEG C.It is 3.5m/min that metal flow goes out nib speed.Annealing temperature is 450 DEG C, 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: for Al-0.6Mg-0.4Si-0.3Re-0.02B alloy
Alloy preheating temperature is 180 DEG C, 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.Described Re is mishmetal, and its composition and mass percentage are: Ce:40%; La:60%; Refining time is 4min.Extrusion temperature is 450 DEG C.It is 2.5m/min that metal flow goes out nib speed; Annealing temperature is 370 DEG C, 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%.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, other amendments that those of ordinary skill in the art make technical scheme of the present invention or equivalently to replace, only otherwise depart from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of right of the present invention.
Claims (4)
1. a preparation method for high-strength highly-conductive aluminium alloy conductor, is characterized in that: comprise the steps:
The first step, prepares;
1) pre-treatment step;
2) preheating; According to proportioning Mg:0.45 ~ 0.9%, Si:0.2 ~ 0.6%, Re:0.1% ~ 1%, B:0.01% ~ 0.1%, all the other are aluminium, and described Re is mishmetal, and its composition and mass percentage are: Ce:10 ~ 40%; La:40 ~ 70%; Other 0 ~ 20%, by pure magnesium, Al-Si, Al-Re, Al-B master alloy preheating 20 ~ 60min at 150 ~ 250 DEG C of temperature in drying baker; Adopt metal type dies, mould and commercial-purity aluminium be 250 DEG C of preheatings in resistance furnace;
Second step, melting;
1) plumbago crucible is placed in resistance furnace, is warming up to 400 DEG C, adds commercial-purity aluminium;
2) be warming up to 720 DEG C, after fine aluminium all melts, take bath surface oxidation sludge off;
3) be warming up to 750 DEG C, add preheated pure magnesium and Al-Si master alloy, and be incubated 30 ~ 50min, period, every 10min stirred once; Add preheated Al-Re and Al-B master alloy subsequently, and be incubated 30 ~ 50min, period, every 10min whisked once;
4) be cooled to 720 DEG C, take out crucible, pass into dry argon gas to melt refining 3 ~ 5min;
5) crucible is put into resistance furnace, leave standstill 10min, the oxide compound of removing bath surface, is cast in preheated metal die;
3rd step, extruding and drawing;
1) on extrusion machine, Al-Mg-Si-Re-B alloy is extruded;
2) by the alloy bar after extruding, on drawing wire machine, the aluminum alloy line of diameter 5mm is drawn into; Then carry out process annealing, annealing temperature 300 ~ 450 DEG C, time 50 ~ 100min, to eliminate work hardening, recover alloy plasticity; Be drawn into the aluminium alloy conductor of diameter 3mm again.
2. the preparation method of a kind of high-strength highly-conductive aluminium alloy conductor according to claim 1, is characterized in that: in described 3rd step, extrusion temperature is 420 ~ 480 DEG C, and it is 2 ~ 3.5m/min that metal flow goes out nib speed.
3. the preparation method of a kind of high-strength highly-conductive aluminium alloy conductor according to claim 1, is characterized in that: in described 3rd step, internal diameter of the container is 58mm, and blank diameter is 56mm; Diameter after extruding is l0mm.
4. the preparation method of a kind of high-strength highly-conductive aluminium alloy conductor according to claim 1, 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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| 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 |
| CN105624593B (en) * | 2015-11-26 | 2018-05-15 | 新疆众和股份有限公司 | A kind of method for annealing welded with Alar bar |
| 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 |
| 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 |
| 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 |
| 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 |
| 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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| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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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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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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Effective date of registration: 20210127 Address after: 466000 high tech Industrial Cluster zone, Chuanhui District, Zhoukou City, Henan Province Patentee after: Henan Jiutong Cable Technology Co.,Ltd. Address before: 466000 north section of Zhongzhou Road, Zhoukou City, Henan Province Patentee before: HENAN JIUTONG CABLE Co.,Ltd. |
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Effective date of registration: 20230530 Address after: 466000 South, 300m west of the intersection of Daqing Road and Shennong Road, Chuanhui District, Zhoukou, Henan Patentee after: Henan Tongda Jiutong Cable Co.,Ltd. Address before: 466000 high tech Industrial Cluster zone, Chuanhui District, Zhoukou City, Henan Province Patentee before: Henan Jiutong Cable Technology Co.,Ltd. |