CN103667801B - For the preparation method of the superelevation electric conductivity aluminium alloy conductor of power transmission system - Google Patents
For the preparation method of the superelevation electric conductivity aluminium alloy conductor of power transmission system Download PDFInfo
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 55
- 230000005540 biological transmission Effects 0.000 title claims abstract description 15
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000004020 conductor Substances 0.000 title abstract description 6
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 50
- 239000004411 aluminium Substances 0.000 claims abstract description 38
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 38
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 25
- 229910052684 Cerium Inorganic materials 0.000 claims abstract description 13
- 229910052688 Gadolinium Inorganic materials 0.000 claims abstract description 13
- 229910052772 Samarium Inorganic materials 0.000 claims abstract description 13
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims abstract description 13
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 13
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims abstract description 13
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims abstract description 13
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052727 yttrium Inorganic materials 0.000 claims abstract description 13
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052742 iron Inorganic materials 0.000 claims abstract description 12
- 229910052779 Neodymium Inorganic materials 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 76
- 239000000956 alloy Substances 0.000 claims description 76
- 239000007788 liquid Substances 0.000 claims description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 20
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 17
- 229910052733 gallium Inorganic materials 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 17
- 239000011777 magnesium Substances 0.000 claims description 14
- 238000005275 alloying Methods 0.000 claims description 13
- 229910001051 Magnalium Inorganic materials 0.000 claims description 12
- KMWBBMXGHHLDKL-UHFFFAOYSA-N [AlH3].[Si] Chemical compound [AlH3].[Si] KMWBBMXGHHLDKL-UHFFFAOYSA-N 0.000 claims description 12
- YVIMHTIMVIIXBQ-UHFFFAOYSA-N [SnH3][Al] Chemical compound [SnH3][Al] YVIMHTIMVIIXBQ-UHFFFAOYSA-N 0.000 claims description 12
- -1 aluminium manganese Chemical compound 0.000 claims description 12
- 239000011572 manganese Substances 0.000 claims description 10
- 238000009749 continuous casting Methods 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 229910052718 tin Inorganic materials 0.000 claims description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 5
- 238000003723 Smelting Methods 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 5
- 238000007872 degassing Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 5
- 238000011049 filling Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- VHHHONWQHHHLTI-UHFFFAOYSA-N hexachloroethane Chemical compound ClC(Cl)(Cl)C(Cl)(Cl)Cl VHHHONWQHHHLTI-UHFFFAOYSA-N 0.000 claims description 5
- 229910052749 magnesium Inorganic materials 0.000 claims description 5
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 150000002910 rare earth metals Chemical class 0.000 claims description 5
- 238000010183 spectrum analysis Methods 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 3
- 238000007669 thermal treatment Methods 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims description 2
- 238000007670 refining Methods 0.000 claims description 2
- 239000012535 impurity Substances 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910019752 Mg2Si Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
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- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The present invention relates to a kind of superelevation electric conductivity aluminium alloy conductor for power transmission system and preparation method thereof, the composition of this aluminium alloy and weight percentage are Si:0.14-0.3%, Fe:1.1-1.3, Mn:0.25-0.4, Mg:0.03-0.045, Ga:0.1-0.2, Sn:0.02-0.04, mixed rare-earth elements RE:0.01-0.03, surplus is aluminium and inevitable impurity element; Lanthanum in the component of described mixed rare-earth elements: 20-30%, cerium: 20-30%, samarium: 10-20, gadolinium: 10-20,? yttrium: 5-10, neodymium: 5-10; This aluminium alloy has superelevation electric conductivity and excellent tensile strength and tensile property.
Description
Technical field
The present invention relates to power industry transmission line wire technical field, particularly, relate to a kind of superelevation electric conductivity aluminium alloy conductor for power transmission system and preparation method thereof.
Background technology
The Aluminium Cable Steel Reinforced that overhead transmission line adopts due to the restriction of thermotolerance, and uses heat-resistant aluminum alloy wire more.Intensity is not reduced in order in During Process of Long-term Operation at the normal operating temperature, do not increase conducting wire sag obvious, usually in electrician's fine aluminium, add trace alloying element such as zirconium, titanium etc. improve the recrystallization temperature of aluminium to improve the thermotolerance of aluminium, although but zirconium, adding of titanium alloy element ensure that thermotolerance, cause the reduction of aluminium conductor electric conductivity.The electric conductivity of the heat-resistant aluminum alloy wire of early development is lower, makes the electric conductivity of heat-resistant aluminum alloy wire be increased to 60%IACS further by the existing forms adding rare earth element and boron control impurity element.Chinese patent CN102041418A discloses the middle strength aluminium alloy line method of a kind of manufacture 57% electric conductivity, although tensile strength >=245MPa, but its electric conductivity is only 57%, if widely use on the line, the huge loss of transmitting line electric energy certainly will be caused, cause the voltage of circuit significantly to reduce simultaneously.
Based on above Study and appliance background, China needs research and development superelevation conduction heat-resistant aluminum alloy wire badly to adapt to China's power industry development need, manufacture the aluminium alloy monofilament with superelevation electric conductivity, to supply raw materials basis for preparing high-conductive heat-resistant aluminium alloy conductor, make heat-resistant aluminum alloy wire reach raising transmission capacity, reduce the object of transmission line loss, thus meet the construction demand of large capacity transmission circuit and city extending capacity reformation.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, provide a kind of superelevation electric conductivity and preparation method thereof, this aluminium alloy has >=the superelevation electric conductivity of 62%IACS and the tensile strength of >=260MPa and tensile property, thus meet the construction demand of large capacity transmission circuit.
For achieving the above object, technical scheme of the present invention is as follows:
A preparation method for superelevation electric conductivity aluminum alloy line, the composition of this aluminium alloy and weight percentage are Si:0.14-0.3%, Fe:1.1-1.3, Mn:0.25-0.4, Mg:0.03-0.045, Ga:0.1-0.2, Sn:0.02-0.04, mixed rare-earth elements RE:0.01-0.03, lanthanum in the component of described mixed rare-earth elements: 20-30%, cerium: 20-30%, samarium: 10-20, gadolinium: 10-20, yttrium: 5-10, neodymium: 5-10.
The preparation method of described aluminum alloy line, comprises the steps:
(1) raw material prepares: select purity to be more than or equal to the aluminium ingot of 99.9%, silicon, iron, manganese, magnesium, gallium and tin select aluminium silicon master alloy respectively, ferro-aluminum master alloy, aluminium manganese master alloy, magnalium master alloy, the form of gallium and aluminium tin master alloy, and by lanthanum, cerium, samarium, gadolinium, rare earth aluminium ingot mixing intermediate smelted into by the mishmetal that yttrium and neodymium form and fine aluminium ingot in crucible, and wherein mishmetal accounts for the 5-8% of mixing intermediate;
(2) aluminium ingot melting: aluminium ingot is put into after the vertical smelting furnace being heated to 850-880 DEG C is molten into aluminium liquid, be transferred to be heated to 760-780 DEG C holding furnace in;
(3) Alloying Treatment: first add described mixing intermediate in aluminium liquid, stirs, and add aluminium silicon master alloy again, ferro-aluminum master alloy, aluminium manganese master alloy, magnalium master alloy after fully dissolving, gallium and aluminium tin master alloy carry out alloying; (4) refining: with 0.65-0.8% hexachloroethane at twice with 2/3rds place's refined alloy liquid under bell jar press-in alloy molten solution face, stir afterwards, churning time is 20-30min, leaves standstill 30min;
(5) alloy component analysis, adjustment: carry out stokehold detection to principal element with direct-reading fast spectral analysis instrument, analyzes, adjusts, strict control element content;
(6) continuous casting: the molten aluminium alloy liquid in holding furnace, through chute, is filtered by online degasification and ceramic filtering device, enters liquid filling machine continuous casting;
(7) thermal treatment: aluminum alloy ingot is put into baking oven and heat-treats, temperature is 300-400 DEG C, and the time is 1-2 hour, takes out;
(8) drawing and stranded: pull into the aluminum alloy line that diameter is 1.8-2.0mm by through heat treated aluminum alloy ingot on drawing machine.
The composition of described aluminium alloy and weight percentage are Si:0.18%, Fe:1.2, Mn:0.3, Mg:0.03, Ga:0.1, Sn:0.03, mixed rare-earth elements RE:0.02, lanthanum in the component of described mixed rare-earth elements: 30%, cerium: 30%, samarium: 20%, gadolinium: 10%, yttrium: 5%, neodymium: 5%.
Described mixing intermediate adds when being heated to 780-790 DEG C, described aluminium silicon master alloy, ferro-aluminum master alloy, aluminium manganese master alloy, magnalium master alloy, and the temperature that gallium and aluminium tin master alloy carry out alloying is 800-810 DEG C.
In described step (8), drawing speed is 20m/s, and each relative reduction in area is 20%.
In the present invention, Si controls at 0.14-0.3%, adds silicon and can generate Mg2Si phase, even if also can ensure that under poor quenching conditions enough alloying elements enter in sosoloid, strengthens the intensity of aluminium alloy;
In the present invention, Fe controls at 1.1-1.3%, iron level higher than 1.3 time can affect the electrical property of alloy, lower than 1.1 time little to the raising effect of the performance such as resistance toheat, plasticity of aluminium alloy.
In the present invention, Mn controls at 0.25-0.4%, and manganese can improve the recrystallization temperature of aluminium alloy, refinement recrystal grain.
In the present invention, Mg controls at 0.03-0.05%, and the Mg content within the scope of this can the thermotolerance of maximized raising aluminium alloy and electroconductibility.
In the present invention, mixed rare-earth elements controls at 0.01-0.03%, can purify, crystal grain thinning, and improves electroconductibility, and mixed rare-earth elements does not need too much, and intensity and lumber recovery can be made during more than 0.03% on the contrary to decline.
In the present invention, Ga controls at 0.1-0.2%, obviously can improve the resistance toheat of aluminum alloy line, and improves intensity on the basis ensureing resistance toheat.
In the present invention, Sn controls at 0.02-0.04%, and tin can strengthen the hardness of aluminium alloy, but can produce corrosion when content exceedes certain content; The present invention also accurately controls above-mentioned composition at specific content range by optimized alloy composition, also by regulating addition sequence and the soaking time of alloying element, and apply thermal treatment process, ensure that alloy has >=the superelevation electric conductivity of 62%IACS and the tensile strength of >=260MPa and tensile property, thus meet the construction demand of large capacity transmission circuit.
Embodiment
Below the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
Embodiment 1
Purity is selected to be more than or equal to the aluminium ingot of 99.9%, silicon, iron, manganese, magnesium, gallium and tin select aluminium silicon master alloy respectively, ferro-aluminum master alloy, aluminium manganese master alloy, magnalium master alloy, the form of gallium and aluminium tin master alloy, and by lanthanum, cerium, samarium, gadolinium, rare earth aluminium ingot mixing intermediate smelted into by the mishmetal that yttrium and neodymium form and fine aluminium ingot in crucible, and wherein mishmetal accounts for 6% of mixing intermediate; Aluminium ingot melting: aluminium ingot is put into after the vertical smelting furnace being heated to 850-880 DEG C is molten into aluminium liquid, be transferred to be heated to 780 DEG C holding furnace in; Mixing intermediate adds when being heated to 790 DEG C, and aluminium silicon master alloy, ferro-aluminum master alloy, aluminium manganese master alloy, magnalium master alloy, the temperature that gallium and aluminium tin master alloy carry out alloying is 805 DEG C.With 0.8% hexachloroethane at twice with 2/3rds place's refined alloy liquid under bell jar press-in alloy molten solution face, stir afterwards, churning time is 30min, leaves standstill 30min; With direct-reading fast spectral analysis instrument, stokehold detection carried out to principal element, analyze, adjust, strict control element content; Molten aluminium alloy liquid in holding furnace, through chute, is filtered by online degasification and ceramic filtering device, enters liquid filling machine continuous casting; Aluminum alloy ingot is put into baking oven heat-treat, temperature is 360 DEG C, and the time is 1.5 hours, takes out; On drawing machine, the aluminum alloy line that diameter is 1.8mm is pulled into by through heat treated aluminum alloy ingot.Drawing speed is 20m/s, and each relative reduction in area is 20%.Aluminium alloy consist of Si:0.18%, Fe:1.2, Mn:0.3, Mg:0.03, Ga:0.1, Sn:0.03, mixed rare-earth elements RE:0.02, lanthanum in the component of described mixed rare-earth elements: 30%, cerium: 30%, samarium: 20%, gadolinium: 10%, yttrium: 5%, neodymium: 5%.After testing, electric conductivity is 62.2%IACS, and tensile strength is 268MPa.
Embodiment 2
Purity is selected to be more than or equal to the aluminium ingot of 99.9%, silicon, iron, manganese, magnesium, gallium and tin select aluminium silicon master alloy respectively, ferro-aluminum master alloy, aluminium manganese master alloy, magnalium master alloy, the form of gallium and aluminium tin master alloy, and by lanthanum, cerium, samarium, gadolinium, rare earth aluminium ingot mixing intermediate smelted into by the mishmetal that yttrium and neodymium form and fine aluminium ingot in crucible, and wherein mishmetal accounts for 8% of mixing intermediate; Aluminium ingot melting: aluminium ingot is put into after the vertical smelting furnace being heated to 860 DEG C is molten into aluminium liquid, be transferred to be heated to 760 DEG C holding furnace in; Mixing intermediate adds when being heated to 785 DEG C, and aluminium silicon master alloy, ferro-aluminum master alloy, aluminium manganese master alloy, magnalium master alloy, the temperature that gallium and aluminium tin master alloy carry out alloying is 800 DEG C.With 0.7% hexachloroethane at twice with 2/3rds place's refined alloy liquid under bell jar press-in alloy molten solution face, stir afterwards, churning time is 25min, leaves standstill 30min; With direct-reading fast spectral analysis instrument, stokehold detection carried out to principal element, analyze, adjust, strict control element content; Molten aluminium alloy liquid in holding furnace, through chute, is filtered by online degasification and ceramic filtering device, enters liquid filling machine continuous casting; Aluminum alloy ingot is put into baking oven heat-treat, temperature is 400 DEG C, and the time is 1 hour, takes out; On drawing machine, the aluminum alloy line that diameter is 2.0mm is pulled into by through heat treated aluminum alloy ingot.Drawing speed is 18m/s, and each relative reduction in area is 20%.Aluminium alloy consist of Si:0.14%, Fe:1.15, Mn:0.25, Mg:0.045, Ga:0.1, Sn:0.04, lanthanum in the component of mixed rare-earth elements described in mixed rare-earth elements RE:0.03: 30%, cerium: 30%, samarium: 10%, gadolinium: 10%, yttrium: 10%, neodymium: 10%.After testing, electric conductivity is 62.1%IACS, and tensile strength is 265MPa.
Embodiment 3
Purity is selected to be more than or equal to the aluminium ingot of 99.9%, silicon, iron, manganese, magnesium, gallium and tin select aluminium silicon master alloy respectively, ferro-aluminum master alloy, aluminium manganese master alloy, magnalium master alloy, the form of gallium and aluminium tin master alloy, and by lanthanum, cerium, samarium, gadolinium, rare earth aluminium ingot mixing intermediate smelted into by the mishmetal that yttrium and neodymium form and fine aluminium ingot in crucible, and wherein mishmetal accounts for 8% of mixing intermediate; Aluminium ingot melting: aluminium ingot is put into after the vertical smelting furnace being heated to 870 DEG C is molten into aluminium liquid, be transferred to be heated to 760 DEG C holding furnace in; Mixing intermediate adds when being heated to 790 DEG C, and aluminium silicon master alloy, ferro-aluminum master alloy, aluminium manganese master alloy, magnalium master alloy, the temperature that gallium and aluminium tin master alloy carry out alloying is 810 DEG C.With 0.65% hexachloroethane at twice with 2/3rds place's refined alloy liquid under bell jar press-in alloy molten solution face, stir afterwards, churning time is 25min, leaves standstill 30min; With direct-reading fast spectral analysis instrument, stokehold detection carried out to principal element, analyze, adjust, strict control element content; Molten aluminium alloy liquid in holding furnace, through chute, is filtered by online degasification and ceramic filtering device, enters liquid filling machine continuous casting; Aluminum alloy ingot is put into baking oven heat-treat, temperature is 300 DEG C, and the time is 2 hours, takes out; On drawing machine, the aluminum alloy line that diameter is 2.0mm is pulled into by through heat treated aluminum alloy ingot.Drawing speed is 20m/s, and each relative reduction in area is 20%.Aluminium alloy consist of Si:0.16%, Fe:1.3, Mn:0.4, Mg:0.035, Ga:0.2, Sn:0.02, mixed rare-earth elements RE:0.025, lanthanum in the component of described mixed rare-earth elements: 30%, cerium: 30%, samarium: 10%, gadolinium: 10%, yttrium: 10%, neodymium: 10%.After testing, electric conductivity is 62.05%IACS, and tensile strength is 266MPa.
Alloy composition in embodiment 1-3 and performance test are as shown in table 1,2.
Table 1
| Alloying constituent (weight percent) | Si | Fe | Mn | Mg | Ga | Sn | Mixed rare-earth elements |
| Embodiment 1 | 0.18 | 1.2 | 0.3 | 0.03 | 0.1 | 0.03 | 0.02 |
| Embodiment 2 | 0.14 | 1.15 | 0.25 | 0.045 | 0.1 | 0.04 | 0.03 |
| Embodiment 3 | 0.16 | 1.3 | 0.4 | 0.035 | 0.2 | 0.02 | 0.025 |
Table 2
| Numbering | Electric conductivity IACS | Tensile strength MPa | Winding performance test | Bending property is tested |
| Embodiment 1 | 62.2 | 268 | Pass through | Pass through |
| Embodiment 2 | 62.1 | 265 | Pass through | Pass through |
| Embodiment 3 | 62.05 | 266 | Pass through | Pass through |
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1., for a preparation method for the superelevation electric conductivity aluminum alloy line of power transmission system, it is characterized in that the composition of this aluminium alloy and weight percentage are Si:0.14-0.3, Fe:1.1-1.3, Mn:0.25-0.4, Mg:0.03-0.045, Ga:0.1-0.2, Sn:0.02-0.04, mixed rare-earth elements RE:0.01-0.03, lanthanum in the component of described mixed rare-earth elements: 20-30, cerium: 20-30, samarium: 10-20, gadolinium: 10-20, yttrium: 5-10, neodymium: 5-10;
The preparation method of described aluminum alloy line, comprises the steps:
(1) raw material prepares: select purity to be more than or equal to the aluminium ingot of 99.9%, silicon, iron, manganese, magnesium, gallium and tin select aluminium silicon master alloy respectively, ferro-aluminum master alloy, aluminium manganese master alloy, magnalium master alloy, the form of gallium and aluminium tin master alloy, and by lanthanum, cerium, samarium, gadolinium, rare earth aluminium ingot mixing intermediate smelted into by the mishmetal that yttrium and neodymium form and fine aluminium ingot in crucible, and wherein mishmetal accounts for the 5-8% of mixing intermediate;
(2) aluminium ingot melting: aluminium ingot is put into after the vertical smelting furnace being heated to 850-880 DEG C is molten into aluminium liquid, be transferred to be heated to 760-780 DEG C holding furnace in;
(3) Alloying Treatment: first add described mixing intermediate in aluminium liquid, stirs, and add aluminium silicon master alloy again, ferro-aluminum master alloy, aluminium manganese master alloy, magnalium master alloy after fully dissolving, gallium and aluminium tin master alloy carry out alloying;
(4) refining: with 0.65-0.8% hexachloroethane at twice with 2/3rds place's refined alloy liquid under bell jar press-in alloy molten solution face, stir afterwards, churning time is 20-30min, leaves standstill 30min;
(5) alloy component analysis, adjustment: carry out stokehold detection to principal element with direct-reading fast spectral analysis instrument, analyzes, adjusts, strict control element content;
(6) continuous casting: the molten aluminium alloy liquid in holding furnace, through chute, is filtered by online degasification and ceramic filtering device, enters liquid filling machine continuous casting;
(7) thermal treatment: aluminum alloy ingot is put into baking oven and heat-treats, temperature is 300-400 DEG C, and the time is 1-2 hour, takes out;
(8) drawing and stranded: pull into the aluminum alloy line that diameter is 1.8-2.0mm by through heat treated aluminum alloy ingot on drawing machine.
2. the preparation method of a kind of superelevation electric conductivity aluminum alloy line for power transmission system as claimed in claim 1, the composition of described aluminium alloy and weight percentage are Si:0.18, Fe:1.2, Mn:0.3, Mg:0.03, Ga:0.1, Sn:0.03, mixed rare-earth elements RE:0.02, lanthanum in the component of described mixed rare-earth elements: 30, cerium: 30, samarium: 20, gadolinium: 10, yttrium: 5, neodymium: 5.
3. the preparation method of a kind of superelevation electric conductivity aluminum alloy line for power transmission system as claimed in claim 1 or 2, described mixing intermediate adds when being heated to 780-790 DEG C, described aluminium silicon master alloy, ferro-aluminum master alloy, aluminium manganese master alloy, magnalium master alloy, the temperature that gallium and aluminium tin master alloy carry out alloying is 800-810 DEG C.
4. the preparation method of a kind of superelevation electric conductivity aluminum alloy line for power transmission system as claimed in claim 1 or 2, in described step (8), drawing speed is 18-20m/s, and each relative reduction in area is 20%.
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| CN104264009B (en) * | 2014-09-30 | 2016-11-23 | 国网河南省电力公司周口供电公司 | A kind of high-iron aluminum alloy conductor material and annealing process thereof |
| CN108098088B (en) * | 2018-01-12 | 2023-12-29 | 昆山品志金属材料有限公司 | Slow wire cutting device and cutting control method |
| CN108893660B (en) * | 2018-07-11 | 2021-08-06 | 山东欣意铝合金电缆有限公司 | High-conductivity aluminum alloy conductor and preparation method thereof |
| CN111128445B (en) * | 2019-12-06 | 2022-03-08 | 远东电缆有限公司 | Aluminum-manganese alloy steel-clad reinforced overhead conductor and preparation process thereof |
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| CN101060039A (en) * | 2006-10-09 | 2007-10-24 | 北京科技大学 | A leadless alloy designed electrolytic capacitor aluminum foil |
| CN101587757A (en) * | 2009-06-19 | 2009-11-25 | 金杯电工股份有限公司 | Aluminum alloy lead with lanthanon yttric and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101060039A (en) * | 2006-10-09 | 2007-10-24 | 北京科技大学 | A leadless alloy designed electrolytic capacitor aluminum foil |
| CN101587757A (en) * | 2009-06-19 | 2009-11-25 | 金杯电工股份有限公司 | Aluminum alloy lead with lanthanon yttric and preparation method thereof |
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