CN103667804A - Novel aluminum alloy wire and preparation method thereof - Google Patents
Novel aluminum alloy wire and preparation method thereof Download PDFInfo
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- CN103667804A CN103667804A CN201310661085.3A CN201310661085A CN103667804A CN 103667804 A CN103667804 A CN 103667804A CN 201310661085 A CN201310661085 A CN 201310661085A CN 103667804 A CN103667804 A CN 103667804A
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Abstract
The invention discloses a novel aluminum alloy wire and a preparation method thereof. The wire is composed of the following components in percentage by weight: 0.45 to 0.9% of Mg, 0.2 to 0.6% of Si, 0.1% to 1% of Re, 0.0004% to 0.002% of C, 0.006% to 0.03% of Ti, 0.02% to 0.1% of Sr, and the balance being pure aluminum. Re, Ti, C and Sr are added into the Al-Mg-Si alloy so as to refine the crystal particle and transform the Mg2Si phase, thus the conductive performance and mechanical performance of the alloy are improved, and the casting performance of the alloy is improved at the same time. Elements of Re, Ti, C, and Sr are added in the intermediate alloy forms of Al-10Re and Al-3Ti-0.2C-10Sr, the intermediate alloy is easy to melt and has a high absorption rate, so the preparation technology has the advantages of simpleness and convenient application.
Description
Technical field
The present invention relates to a kind of novel aluminum alloy wire and preparation method thereof.
Background technology
The conductivity of copper, intensity and high temperature and creep resistance are good, so be the main raw of traditional electric wire.But China's copper scarcity of resources, the copper of China 80% relies on import at present, causes copper valency to rise violently.China's bauxite resource is relatively abundant, and aluminium alloy has the advantages such as electroconductibility is good, density is little, corrosion-resistant, can meet the requirement of large capacity, long distance power transmission.Therefore the aluminium substitution copper of usining is significant as electric wire and cable material.Conductor material, except having good electroconductibility, also will have certain intensity to support the weight of himself and external natural load-carrying.The high strength alumin ium alloy wire of current domestic use is mainly Al-Mg-Si line aluminium alloy wire.But still there are some problems in Al-Mg-Si line aluminium alloy wire: 1) specific conductivity has much room for improvement.2) Mg that Si forms in alloy
2si often occurs with thick Chinese character piece form mutually, makes the particularly unit elongation decline of room-temperature property of alloy, also can limit Mg simultaneously
2the contribution of the relative alloy high-temperature behavior of Si.3) as-cast structure coarse grains, mechanical property has much room for improvement.
Summary of the invention
The object of the present invention is to provide a kind of novel aluminum alloy wire and preparation method thereof, by add appropriate rare earth and Al-Ti-C-Sr alloy in Al-Mg-Si alloy, to its refinement, rotten processing, when improving alloy conductive, further improve mechanical property.
A novel aluminum alloy wire, wherein, its component and weight percentage are: Mg: 0.45 ~ 0.9%; Si:0.2 ~ 0.6%; Re:0.1% ~ 1%; C:0.0004% ~ 0.002%; Ti:0.006% ~ 0.03%; Sr:0.02% ~ 0.1%; All the other are fine aluminium.
As preferably, described rare earth element Re is mishmetal, and its percentage composition is Ce:30 ~ 70%; La:20 ~ 50%; Other is 0 ~ 20% years old.
A preparation method for novel aluminum alloy wire, comprises the steps:
The first step, prepares;
1) get the raw materials ready; Prepare furnace charge: commercial-purity aluminium, pure magnesium, Al-20Si, Al-10Re, Al-3Ti-0.2C-10Sr master alloy; Described furnace charge is through pre-treatment, except deoiling, the oxide compound on water and surface; Adopt metal type dies, mould inner wall, skim and refining toolrust-removal coat aluminum oxide coating;
2) preheating is by pure magnesium, Al-Si, Al-Re, Al-Ti-C-Sr master alloy preheating 20 ~ 60min at 150 ~ 250 ℃ of temperature in drying baker; The 250 ℃ of preheatings in resistance furnace of mould and institute's furnace burdening;
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 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, every 10min stirs once; Add subsequently preheated Al-Re and Al-Ti-C-Sr master alloy, and be incubated 15 ~ 40min, every 10min stirs once;
4) be cooled to 720 ℃, take out crucible, pass into dry argon gas to melt refining 3 ~ 5min;
5) crucible is put into resistance furnace, standing 10min, removes the oxide compound of bath surface, is cast in preheated metal die;
The 3rd step, extruding and drawing;
1) adopt vertical extruder to push Al-Mg-Si-Re-C-Ti-Sr alloy; Internal diameter of the container is 90mm, and blank diameter is 88mm; Diameter after extruding is 8mm, and extrusion temperature is 420 ~ 480 ℃, and it is 1.5 ~ 3m/min that metal flow goes out nib speed;
2) by the alloy bar after extruding, on drawing wire machine, be drawn into the aluminum alloy line of diameter 2.5mm.
As preferably, described aluminum oxide is Al (OH) for coating
3, the preparation of water, Starso, proportioning is: 3:1:200.
As preferably, described Al-Si, Al-Re, Al-Ti-C-Sr master alloy are respectively Al-20Si, Al-10Re, Al-3Ti-0.2C-10Sr master alloy.
Beneficial effect of the present invention is:
The present invention adds Re, Ti, C and Sr in Al-Mg-Si alloy, crystal grain thinning, rotten Mg
2si phase, puies forward heavy alloyed conductivity, mechanical property, improves its castability simultaneously.Element Re, Ti, C, Sr add with the form of master alloy Al-10Re and Al-3Ti-0.2C-10Sr, and fusing is fast, and specific absorption is high, so preparation technology is simple, and it is convenient to implement.
Embodiment
Below in conjunction with embodiment, the invention will be further described:
Embodiment 1: take Al-0.45Mg-0.2Si-0.1Re-0.0004C-0.006Ti-0.02Sr alloy as example
1), prepare: prepare furnace charge: commercial-purity aluminium, pure magnesium, Al-20Si, Al-10Re, Al-3Ti-0.2C-10Sr master alloy;
Adopt metal type dies, diameter is 88mm; With Al (OH)
3, water, Starso 3:1:200 is mixed with aluminum oxide coating; Mould inner wall, skim and refining toolrust-removal coat aluminum oxide coating; Furnace charge should be through pre-treatment except deoiling, the oxide compound on water and surface etc.; The 250 ℃ of preheatings in resistance furnace of mould and institute's furnace burdening;
Add alloy preheating: by pure magnesium, Al-20Si, Al-10Re, Al-3Ti-0.2C-10Sr master alloy preheating 20min at 150 ℃ of temperature in drying baker;
Select pure magnesium, consumption is charging weight 0.45%;
Select Al-20Si master alloy, its composition is: Si20%, and Al80%, consumption is charging weight 1%;
Select Al-10Re master alloy, its composition is: Al90%, and Re10%, consumption is charging weight 1%; Described Re is mishmetal, and its composition and quality percentage composition are: Ce:30%; La:50%; Other is 20% years old.
Select Al-3Ti-0.2C-10Sr master alloy, its composition is: Al86.8%, and Ti3%, C0.2%, Sr10%, consumption is charging weight 0.2%;
Prepare crucible: first molten more than 8 hours with flux, if do not leaked, side is used for melting aluminum alloy.
2), 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 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 be incubated 30min, during every 10min stir once; Subsequently preheated Al-10Re and Al-3Ti-0.2C-10Sr master alloy are added to aluminium liquid in 1% and 0.2% ratio respectively, and be incubated 15min, middle stirring once;
(4) be cooled to 720 ℃, take out crucible, pass into dry argon gas to melt refining 3min;
(5) crucible is put into resistance furnace, standing 10min, removes the oxide compound of 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 splashes.
3) extruding and drawing:
(6) adopt extrusion machine to push Al-Mg-Si-Re-C-Ti-Sr alloy; Internal diameter of the container is 90mm, and blank diameter is 88mm; Diameter after extruding is 8mm; Extrusion temperature is 420 ℃; It is 1.5m/min that metal flow goes out nib speed;
(7) by the alloy bar after extruding, on drawing silk, according to the parameter of table 1, be drawn into the aluminum alloy line of diameter 4mm.Then carry out process annealing, 300 ℃ of temperature, time 50min, to eliminate work hardening, recovers alloy plasticity.Be drawn into again the aluminium alloy conductor of diameter 2.5mm.After testing, its specific conductivity is 55%, and tensile strength is 285MPa, elongation 11%.
Table 1 drawing process parameter
Embodiment 2: take Al-0.9Mg-0.6Si-1Re-0.002C-0.03Ti-0.1Sr alloy as example
Preparation, preparation process and complete processing are with embodiment 1, wherein: adding alloy preheating temperature is 250 ℃, time 60min.(3) in step, 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-3Ti-0.2C-10Sr master alloy is respectively 10% and 1%, and soaking time is 40min; Described Re is mishmetal, and its composition and quality percentage composition are: Ce:60%; La:30%; Other is 10% years old.(4) in step, refining time is 5min.(6) in step, extrusion temperature is 480 ℃.It is 3m/min that metal flow goes out nib speed.(7) in step, annealing temperature is 450 ℃, time 100min.
After testing, its specific conductivity is 56.7%, and tensile strength is 288MPa, elongation 15%.
Embodiment 3: the Al-0.6Mg-0.4Si-0.3Re-0.001C-0.015Ti-0.05Sr alloy of take is example
Preparation, preparation process and complete processing are with embodiment 1, wherein: adding alloy preheating temperature is 180 ℃, time 50min.(3) in step, 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-3Ti-0.2C-10Sr master alloy is respectively 3% and 0.5%, and soaking time is 30min; Described Re is mishmetal, and its composition and quality percentage composition are: Ce:55%; La:45%.(4) in step, refining time is 4min.(6) in step, extrusion temperature is 450 ℃.It is 2.5m/min that metal flow goes out nib speed; (7) in step, annealing temperature is 370 ℃, time 70min.
After testing, its specific conductivity is 58.5%, and tensile strength is 298MPa, elongation 13%.
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 depart 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 (5)
1. a novel aluminum alloy wire, is characterized in that: its component and weight percentage are: Mg: 0.45 ~ 0.9%; Si:0.2 ~ 0.6%; Re:0.1% ~ 1%; C:0.0004% ~ 0.002%; Ti:0.006% ~ 0.03%; Sr:0.02% ~ 0.1%; All the other are fine aluminium.
2. a kind of novel aluminum alloy wire according to claim 1, is characterized in that: described rare earth element Re is mishmetal, and its percentage composition is Ce:30 ~ 70%; La:20 ~ 50%; Other is 0 ~ 20% years old.
3. the preparation method of a kind of novel aluminum alloy wire according to claim 1 and 2, comprises the steps:
The first step, prepares;
1) get the raw materials ready; Prepare furnace charge: commercial-purity aluminium, pure magnesium, Al-20Si, Al-10Re, Al-3Ti-0.2C-10Sr master alloy; Described furnace charge is through pre-treatment, except deoiling, the oxide compound on water and surface; Adopt metal type dies, mould inner wall, skim and refining toolrust-removal coat aluminum oxide coating;
2) preheating is by pure magnesium, Al-Si, Al-Re, Al-Ti-C-Sr master alloy preheating 20 ~ 60min at 150 ~ 250 ℃ of temperature in drying baker; The 250 ℃ of preheatings in resistance furnace of mould and institute's furnace burdening;
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 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, every 10min stirs once; Add subsequently preheated Al-Re and Al-Ti-C-Sr master alloy, and be incubated 15 ~ 40min, every 10min stirs once;
4) be cooled to 720 ℃, take out crucible, pass into dry argon gas to melt refining 3 ~ 5min;
5) crucible is put into resistance furnace, standing 10min, removes the oxide compound of bath surface, is cast in preheated metal die;
The 3rd step, extruding and drawing;
1) adopt vertical extruder to push Al-Mg-Si-Re-C-Ti-Sr alloy; Internal diameter of the container is 90mm, and blank diameter is 88mm; Diameter after extruding is 8mm, and extrusion temperature is 420 ~ 480 ℃, and it is 1.5 ~ 3m/min that metal flow goes out nib speed;
2) by the alloy bar after extruding, on drawing wire machine, be drawn into the aluminum alloy line of diameter 2.5mm.
4. the preparation method of a kind of novel aluminum alloy wire according to claim 3, is characterized in that: described aluminum oxide is Al (OH) for coating
3, the preparation of water, Starso, proportioning is: 3:1:200.
5. the preparation method of a kind of novel aluminum alloy wire according to claim 3, is characterized in that: described Al-Si, Al-Re, Al-Ti-C-Sr master alloy are respectively Al-20Si, Al-10Re, Al-3Ti-0.2C-10Sr master alloy.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105838929A (en) * | 2016-03-31 | 2016-08-10 | 广东省材料与加工研究所 | Rare earth aluminum alloy wire and manufacturing method thereof |
| CN106048272A (en) * | 2016-06-29 | 2016-10-26 | 焦作市圣昊铝业有限公司 | Preparation method of aluminum, magnesium, silicon and scandium alloy wire |
| 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 |
| CN108130462A (en) * | 2017-12-28 | 2018-06-08 | 淮安和通汽车零部件有限公司 | A kind of 6401C aluminium alloys |
| CN111235437A (en) * | 2020-03-18 | 2020-06-05 | 河南誉金技术服务有限公司 | Al-Mn pipe alloy for household air-conditioning heat exchanger and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105838929A (en) * | 2016-03-31 | 2016-08-10 | 广东省材料与加工研究所 | Rare earth aluminum alloy wire and manufacturing method thereof |
| CN106048272A (en) * | 2016-06-29 | 2016-10-26 | 焦作市圣昊铝业有限公司 | Preparation method of aluminum, magnesium, silicon and scandium alloy wire |
| 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 |
| CN108130462A (en) * | 2017-12-28 | 2018-06-08 | 淮安和通汽车零部件有限公司 | A kind of 6401C aluminium alloys |
| CN108130462B (en) * | 2017-12-28 | 2020-07-10 | 淮安和通汽车零部件有限公司 | 6401C aluminum alloy |
| CN111235437A (en) * | 2020-03-18 | 2020-06-05 | 河南誉金技术服务有限公司 | Al-Mn pipe alloy for household air-conditioning heat exchanger and preparation method thereof |
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