CN101805861B - Corrosion-resisting aluminum alloy for high voltage power line hardware and preparation method thereof - Google Patents
Corrosion-resisting aluminum alloy for high voltage power line hardware and preparation method thereof Download PDFInfo
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- CN101805861B CN101805861B CN2010101575883A CN201010157588A CN101805861B CN 101805861 B CN101805861 B CN 101805861B CN 2010101575883 A CN2010101575883 A CN 2010101575883A CN 201010157588 A CN201010157588 A CN 201010157588A CN 101805861 B CN101805861 B CN 101805861B
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Abstract
The present invention relates to a corrosion-resisting aluminum alloy for a high voltage power line hardware, which comprises the following components: Si, Mg, Ti, Ni, balance of Al and unavoidable impurities. The preparation method of the corrosion-resisting aluminum alloy comprises the steps of batching according to the alloy components, heating and melting the components, insulating, casting, stripping and aging twice. On the basis of the existing aluminum-silicon alloy, the invention greatly reduces the silicon content, adds a small amount of titanium, nickel and magnesium elements, improves the overall strength of the alloy and reduces the brittleness; the titanium, nickel and magnesium elements can improve the electrode potential of an aluminum alloy substrate, improve the electro-chemical corrosion resistance of the aluminum alloy, form an intermetallic compound and an oxidation film, and further improve the oxidation resistance of the alloy; and by aging twice after being casted, the mechanical properties at room temperature and low temperature and corrosion resistance of the alloy are effectively improved. The corrosion-resisting aluminum alloy for a high voltage power line hardware provided by the present invention has reasonable component formula and simple production process, and the produced aluminum alloy has high strength and good corrosion resistance, is suitable for industrialized production, and can replace the existing aluminum alloy material of the high voltage power line hardware.
Description
Technical field
The invention discloses a kind of aluminium alloy and preparation method, refering in particular to is a kind of corrosion-resisting aluminum alloy for high voltage power line hardware and preparation method.Belong to the nonferrous materials technical field.
Background technology
Along with sending the power transformation development of technology, high-tension circuit both can be maked somebody a mere figurehead setting, also can be arranged on underground tens meters depths, therefore, intensity, corrosion resisting property to the electric power circuit gold utensil are had higher requirement, particularly use electric power circuit gold utensil in underground tens meters depths, higher to its intensity and corrosion proof requirement.Prior art generally adopts aluminum silicon alloy to make high voltage power line hardware, and its composition percentage composition by weight is: silicon 10-13%; Manganese 0.2-0.5%; Surplus is aluminium and inevitable impurity.The aluminium alloy of this composition makes alloy become fragile because silicone content is higher easily, causes its intensity lower; Though the corrosion resisting property of aluminium alloy is higher, but because the purity of the employed aluminium alloy of electric power circuit gold utensil is generally low than the employed aluminium alloy purity of power cord, therefore, in the prior art, the corrosion resisting property of the employed aluminum silicon alloy of electric power circuit gold utensil is low than power cord; Nonsynchronous phenomenon of military service cycle of electric power circuit gold utensil and power cord often occurs, promptly the power cord performance is also very good, and the electric power circuit gold utensil is corroded, and performance reduces, failure phenomenon.Like this, cause the security of high-voltage electric power circuit power supply to reduce on the one hand, on the other hand, cause the direct maintaining cost of high-voltage electric power circuit to increase, cause the reliability of vast power consumer electric cost increase and normal electricity consumption to reduce indirectly.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art and a kind of reasonable component formula is provided, production technique is simple, prepared intensity of aluminum alloy height, corrosion-resisting aluminum alloy for high voltage power line hardware that corrosion resisting property is good and preparation method.
A kind of corrosion-resisting aluminum alloy for high voltage power line hardware of the present invention is by the percentage composition by weight of following component:
Si：6.5-7.5，
Mg：0.25-0.45，
Ti：0.08-0.20，
Ni:0.3-0.4, surplus is Al and inevitable impurity.
The preparation method of a kind of corrosion-resisting aluminum alloy for high voltage power line hardware of the present invention is: press the alloy compositions batching, each component is heated to 780～800 ℃ of fusings, be incubated 10～15 minutes, be cooled to 730 ℃ of casting, carry out timeliness after the demoulding 2 times, aging temp is for the first time: 180～240 ℃, and soaking time 2～4 hours, air cooling; For the second time aging temp be-45～-5O ℃, be incubated 2～4 hours, be warming up to room temperature naturally, promptly obtain a kind of corrosion-resisting aluminum alloy for high voltage power line hardware of the present invention.
The present invention on the basis of existing aluminum silicon alloy, reduces silicone content owing to adopt above-mentioned prescription and production technique significantly, adds a spot of titanium, nickel, magnesium elements, can effectively improve the bulk strength of alloy on the one hand, reduces the fragility of alloy; In addition,, improve the electropotential of alloy matrix aluminum, effectively improve the aluminium alloy electrochemically resistant and learn corrosive power by adding titanium, nickel, magnesium elements; Particularly silicon, titanium, nickel, magnesium can form compound and the oxide films such as TiO2, NiO2, SiO2 of Mg2Si, Mg4Al3, NiAl in alloy, further improve the resistance of oxidation of alloy; The present invention can effectively improve alloy at room temperature and low temperature mechanical property and solidity to corrosion owing to adopt casting to add the processing method production of twice timeliness.Compare by the aluminium alloy of prescription of the present invention and processing method production and the aluminium alloy that prior art is produced, its corrosion resisting property improves 15 times at least, and comprehensive mechanical intensity improves 15%.
In sum, reasonable component formula of the present invention, production technique is simple, the intensity of aluminum alloy height of being produced, corrosion resisting property is good, is suitable for suitability for industrialized production, alternative existing high voltage power line hardware aluminum alloy materials.
Embodiment
Below, in conjunction with the embodiments, the present invention is elaborated.
Embodiment 1
Alloying constituent is ww%:Si:6.5, Mg:0.45, and Ti:0.08, Ni:0.3, surplus is Al and inevitable impurity; Each component is heated to 780-800 ℃ of fusing, is incubated 10-15 minute, be cooled to 730 ℃ of casting, carry out timeliness after the demoulding 2 times, aging temp is for the first time: 180 ℃, and soaking time 4 hours, air cooling; Aging temp is-45 ℃ for the second time, is incubated 4 hours, is warming up to room temperature naturally, promptly obtains a kind of corrosion-resisting aluminum alloy for high voltage power line hardware of the present invention.
It is in 1% the salt solution that the aluminum silicon alloy that the aluminium alloy test specimen 1 of embodiment 1 preparation and prior art are produced is immersed in concentration, the aluminium alloy test specimen 1 of present embodiment 1 preparation occurs macroscopic evidence of corrosion through 47 talentes at alloy surface, and the aluminum silicon alloy that prior art is produced macroscopic evidence of corrosion promptly occurs after soaking 3 days.
Embodiment 2
Alloying constituent is ww%:Si:7, Mg:0.35, and Ti:0.12, Ni:0.35, surplus is Al and inevitable impurity; Each component is heated to 780-800 ℃ of fusing, is incubated 10-15 minute, be cooled to 730 ℃ of casting, carry out timeliness after the demoulding 2 times, aging temp is for the first time: 200 ℃, and soaking time 3 hours, air cooling; Aging temp is-48 ℃ for the second time, is incubated 3 hours, is warming up to room temperature naturally, promptly obtains a kind of corrosion-resisting aluminum alloy for high voltage power line hardware of the present invention.
It is in 1% the salt solution that the aluminum silicon alloy that the aluminium alloy test specimen 2 of embodiment 2 preparation and prior art are produced is immersed in concentration, the aluminium alloy test specimen 2 of present embodiment 2 preparations occurs macroscopic evidence of corrosion through 45 talentes at alloy surface, and the aluminum silicon alloy that prior art is produced macroscopic evidence of corrosion promptly occurs after soaking 3 days.
Embodiment 3
Alloying constituent is ww%:Si:7.5, Mg:0.25, and Ti:0.20, Ni:0.4, surplus is Al and inevitable impurity; Each component is heated to 780-800 ℃ of fusing, is incubated 10-15 minute, be cooled to 730 ℃ of casting, carry out timeliness after the demoulding 2 times, aging temp is for the first time: 240 ℃, and soaking time 2 hours, air cooling; Aging temp is-50 ℃ for the second time, is incubated 2 hours, is warming up to room temperature naturally, promptly obtains a kind of corrosion-resisting aluminum alloy for high voltage power line hardware of the present invention.
It is in 1% the salt solution that the aluminum silicon alloy that the aluminium alloy test specimen 3 of embodiment 3 preparation and prior art are produced is immersed in concentration, the aluminium alloy test specimen 3 of present embodiment 3 preparations occurs macroscopic evidence of corrosion through 49 talentes at alloy surface, and the aluminum silicon alloy that prior art is produced macroscopic evidence of corrosion promptly occurs after soaking 3 days.
As seen from the above embodiment, the aluminium alloy that a kind of corrosion-resisting aluminum alloy for high voltage power line hardware of the present invention and prior art are produced compares, and its corrosion resisting property improves 15 times at least.
Claims (2)
1. corrosion-resisting aluminum alloy for high voltage power line hardware, by the percentage composition by weight of following component:
Si：6.5-7.5，
Mg：0.25-0.45，
Ti：0.08-0.20，
Ni:0.3-0.4, surplus is Al and inevitable impurity.
2. prepare a kind of method of corrosion-resisting aluminum alloy for high voltage power line hardware according to claim 1, be to prepare burden by alloy compositions, each component is heated to 780-800 ℃ of fusing, be incubated 10-15 minute, be cooled to 730 ℃ of casting, carry out timeliness after the demoulding 2 times, aging temp is for the first time: 180-240 ℃, soaking time 2-4 hour, air cooling; For the second time aging temp is-45---50 ℃, is incubated 2-4 hour, is warming up to room temperature naturally, promptly obtains a kind of corrosion-resisting aluminum alloy for high voltage power line hardware.
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| CN101805861B true CN101805861B (en) | 2011-07-06 |
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| CN102719713B (en) * | 2012-07-10 | 2013-11-13 | 宁夏东方钽业股份有限公司 | High temperature oxidation-resistant material for low-density niobium alloy and method for preparing high temperature oxidation-resistant coating from high temperature oxidation-resistant material |
| CN104294100A (en) * | 2014-10-14 | 2015-01-21 | 张超 | Material for casting aluminum alloy and preparation method |
| CN104294106A (en) * | 2014-10-29 | 2015-01-21 | 张超 | Preparation method for composition for preventing aluminum alloy from causing large crystal grains |
| CN104294104A (en) * | 2014-10-29 | 2015-01-21 | 郭芙 | Aluminum alloy and preparation method thereof |
| CN104630581A (en) * | 2015-02-10 | 2015-05-20 | 苏州科胜仓储物流设备有限公司 | Heat-resistant wear-resistant aluminium alloy fluency strip and processing process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1673402A (en) * | 2005-02-21 | 2005-09-28 | 李谋祥 | High-strength energy-saving aluminum alloy material for electric power fittings |
| CN101604563A (en) * | 2009-06-04 | 2009-12-16 | 郑州电缆有限公司 | A kind of manufacture method of heat-resistant aluminum alloy wire of power cable |
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| US6918970B2 (en) * | 2002-04-10 | 2005-07-19 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | High strength aluminum alloy for high temperature applications |
| JP2007169712A (en) * | 2005-12-21 | 2007-07-05 | Aisin Seiki Co Ltd | Aluminum alloy for plastic working |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1673402A (en) * | 2005-02-21 | 2005-09-28 | 李谋祥 | High-strength energy-saving aluminum alloy material for electric power fittings |
| CN101604563A (en) * | 2009-06-04 | 2009-12-16 | 郑州电缆有限公司 | A kind of manufacture method of heat-resistant aluminum alloy wire of power cable |
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| JP特开2007-169712A 2007.07.05 |
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