CN103680670A

CN103680670A - Creep-resistant and corrosion-resistant aluminum alloy conductor

Info

Publication number: CN103680670A
Application number: CN201310630159.7A
Authority: CN
Inventors: 魏英; 毛传岚; 崔天峰; 李准
Original assignee: SICHUAN XINDIAN CABLE CO Ltd
Current assignee: SICHUAN XINDIAN CABLE CO Ltd
Priority date: 2013-11-29
Filing date: 2013-11-29
Publication date: 2014-03-26
Anticipated expiration: 2033-11-29
Also published as: CN103680670B

Abstract

The invention discloses a creep-resistant and corrosion-resistant aluminum alloy conductor. The creep-resistant and corrosion-resistant aluminum alloy conductor comprises, by weight, 0.03-0.15% of Si, 0.01-0.25% of Cu, 0.02-0.45% of Zr, 0.3-0.9% of Fe, 0.001-0.012% of Mg, 0.001-0.015% of B, 0.03-0.20% of rare earth elements, the balance aluminum and the balance inevitable impurities. The creep-resistant and corrosion-resistant aluminum alloy conductor has the advantages that the conductivity of the aluminum alloy conductor material can reach 61.9% IACS (international annealed copper standard), the tensile strength of the aluminum alloy conductor material can reach 126MPa, the breaking elongation of the aluminum alloy conductor material can reach 15.6%, and the creep-resistant and corrosion-resistant aluminum alloy conductor is excellent in electrical conductivity, flexibility, corrosion resistance and creep resistance.

Description

Creep-resisting, corrosion-resisting aluminium alloy conductor

Technical field

The present invention relates to a kind of aluminum-alloy conductor material, specifically relate to a kind of creep resistant, anticorrosion, sludge proof aluminium alloy, can be for the manufacture of the conductor wire core of electric wire.

Background technology

For a long time, the selection of people to low-voltage cable for building, normally take copper as main.It is believed that copper conductor in electric property and the degree of reliability all higher than other conductors, be the preferably selection as cable material.But copper is as tellurian a kind of scarce resource, and especially, in our country, ore reserve are very limited, a large amount of dependence on import of Copper Ores.Advocating under the overall situation of energy-conserving and environment-protective, sustainable development, cable industry is being done the best always and is being promoted with aluminium for copper, but aluminum cable problem in use comes out, especially the oxidation of aluminum conductor joint causes a lot of fire, in addition the various advantages such as stable, the anti-mechanical fatigue of copper conductor electric property, resistance to chemical attack has just become and has usingd copper as main material gradually in application.

But, following scientific and technical development, after the aluminium of high-quality, high-tech content is developed, in addition the current resources situation of the rich aluminium of global poor copper, before copper marked price, be 3 times of above (approximately 5.5 ten thousand yuan/ton of copper of aluminium valency, approximately 1.45 ten thousand yuan/ton, aluminium), weight is 3.3 times of aluminium, with " aluminium ", for copper, becomes again inevitable choice.

Yet aluminum for electric engineering at present used, as cable aluminium conductor, in use has more defect, as contact resistance is large, has creep, binding post, through using after a while, produces and becomes flexible, easily initiation fire.

My company just under this background, has overcome the deficiency of aluminum existing, has researched and developed the rare earth aluminum alloy material of a kind of structure creep resistant, corrosion-resistant, high conduction performance.Thereby obtain the novel cable conductor material that has more advantage than common copper material.

Summary of the invention

The object of this invention is to provide a kind of creep resistant, corrosion resistant aluminum alloy electric conducting material, this aluminium alloy electric conducting material has excellent conductivity, flexibility, and anti-oxidant, lightweight, intensity is high, long-time running is reliable and stable.

In order to reach above-mentioned technique effect, the present invention takes following technical scheme:

A creep-resisting, corrosion-resisting aluminum-alloy conductor material, comprises the component of following weight percentage:

Si, 0.03-0.15%; Be improve liquidity can Main Ingredients and Appearance.From eutectic, to hypereutectic, can obtain best mobility.In addition, intensity in the time of can improving tensile strength, hardness, machinability and high temperature.Excessive meeting reduces elongation.

Cu, 0.01-0.25%; Mechanical performance can improve, and machinability improves.Excessive meeting causes corrosion resistance to reduce, and slight crack between heat easily occurs.

Zr, 0.02-0.45%; Can hinder recrystallization process, refinement recrystal grain.Yi Neng refinement cast sturcture.

Fe, 0.3-0.9%; Can generate metallic compound, form hard spot, increase aluminium alloy creep-resistant property.When content is low, there is the phenomenon that is difficult for the demoulding; When content is high, can causes and crack.

Mg, 0.001-0.012%; Can increase the corrosion resistance of alloy, be corrosion resistant alloy, but good weldability, corrosion stability, and have moderate strength.Content increases, and its freezing range increases, and produces red brittleness, toughness drop.

B, 0.001-0.015%; Non-spontaneous core while becoming crystallization, plays refinement cast sturcture and seam organization.

Rare earth element ce, 0.03-0.20%; In aluminium alloy, add trace rare-earth element, can significantly improve the metallographic structure of aluminium alloy, crystal grain thinning, remove gas and objectionable impurities in aluminium alloy, reduce the formation of crack of aluminium alloy, thereby improve the intensity of aluminium alloy, improve processing characteristics, can also improve thermal endurance, plasticity and the malleability of aluminium alloy, improve hardness, gain in strength and toughness.

Surplus is aluminium and inevitable impurity.

According to embodiments of the invention, in above-mentioned aluminum-alloy conductor material, described rare earth element is one or more in lanthanide series.

The present invention compared with prior art, has following beneficial effect:

The conductance of aluminum-alloy conductor material of the present invention can reach 61.9%IACS, and tensile strength can reach 126MPa, and elongation at break can reach 15.6%; There is excellent conductivity, flexibility, anti-corrosive properties and creep resistance.

Embodiment

Below in conjunction with embodiments of the invention, the invention will be further elaborated.

Embodiment 1:

The casting method step of aluminium alloy conductor of the present invention is as follows:

1, batching

According to following component ratio scope, be that basic point is prepared burden: Si, 0.03-0.15%; Cu, 0.01-0.25%; Zr, 0.02-0.45%; Fe, 0.3-0.9%; Mg, 0.001-0.012%; B, 0.001-0.015%; Rare earth element, 0.03-0.20%; Surplus is aluminium and inevitable impurity, and batching should not exceed this scope.

2, fusing

Rare earth aluminium alloy smelting temperature is controlled within the scope of 700-760 ℃, and too high temperature can be aggravated the oxidizing process of aluminium, and too low aluminium liquid is atherosclerotic, makes slag and impurity not easily separated.The slag that floats on already liquid level will be removed in time, because the aluminum oxide film membrane structure generating on liquid level is very fine and close, there is the further effect of oxidation that prevents, but because proportion and the aluminium alloy of aluminium oxide are very approaching, therefore it remains in aluminium liquid not floating upper liquid level automatically, need remove by the way of refining.

3, sampling and testing after electromagnetic agitation

After the even rare earth aluminium alloy melting of electromagnetic agitation completes, sampling while maintaining the temperature within the scope of 720-750 ℃, adopts spectrometer measurement should carry out chemical composition analysis to it, according to measurement result and batching percentage, compares, optionally adjust, until qualified.

4, refining

The refining of alloy is for pure aluminium alloy, also makes the gas containing in alloy discharge, and lessens the hidden dangers, and improves alloy purity.

4.1, refining agent

Be generally zinc chloride, carbon trichloride, chlorine, nitrogen and also have manganese chloride, titanium dioxide adds manganese chloride.

4.2, the use amount of refining agent

Conventionally the ratio of refining agent and alloy is 2～4%.

4.3, refining temperature

Refining temperature is generally 700 ℃～740 ℃ refinings 10 minutes, standing 15 minutes, blows chlorine refining temperature and is no more than 700 ℃, air pressure 0.1-0.2MPa.

4.4, refining mode:

Adopt bell jar that refining agent is pressed onto apart from furnace bottom 100mm left and right and is stirred.Nitrogen flushing is blown chlorine and is used inflating catheter.Also can adopt nitrogen to make carrier enters aluminium liquid by refining agent winding-up and achieves the goal.

5, casting and rolling process is controlled

5.1 temperature are controlled

5.1.1 water alclad coolant-temperature gage: 710～740 ℃

5.1.2 enter to roll temperature: 460～500 ℃

5.1.3 finishing temperature: 300 ℃

5.1.4 rolling emulsion temperature: 50 ℃

The control of 5.2 casting cooling waters

Cooling water temperature is 25～30 ℃, and pressure is 0.3MPa.

5.3 rolling mill speeds: 7.5～8.5m/s; The pressure of rolling emulsion is 0.16MPa.

Aluminium alloy conductor after testing, comprises following weight component very:

Si，0.04%；

Cu，0.04%；

Zr，0.025%；

Fe，0.7%；

Mg，0.004%；

B，0.01%；

Rare earth, 0.12%;

Surplus is aluminium and inevitable impurity.

Its conductance is 61.5%IACS after testing, and tensile strength is 113MPa, and elongation at break is 24.1%.

Embodiment 2:

According to the casting method in embodiment 1, a kind of aluminum-alloy conductor material, comprises following weight component very:

Si，0.03%；

Cu，0.01%；

Zr，0.08%；

Fe，0.47%；

Mg，0.002%；

B，0.002%；

Rare earth, 0.06%;

Surplus is aluminium and inevitable impurity.

Its conductance is 60.4%IACS after testing, and tensile strength is 122MPa, and elongation at break is 15.6%.

Embodiment 3:

Si，0.08%；

Cu，0.15%；

Zr，0.15%；

Fe，0.85%；

Mg，0.006%；

B，0.004%；

Rare earth, 0.04%;

Surplus is aluminium and inevitable impurity;

Its conductance is 61.9%IACS after testing, and tensile strength is 116MPa, and elongation at break is 19%.

Embodiment 4:

Si，0.10%；；

Cu，0.18%；

Zr，0.30%；

Fe，0.55%；

Mg，0.006%；

B，0.006%；

Rare earth, 0.09%;

Surplus is aluminium and inevitable impurity;

Its conductance is 61.0%IACS after testing, and tensile strength is 126MPa, and elongation at break is 18.5%.

Embodiment 5:

Si，0.05%；

Cu，0.22%；

Zr，0.4%；

Fe，0.35%；

Mg，0.009%；

B，0.008%；

Rare earth, 0.16%;

Surplus is aluminium and inevitable impurity;

Its conductance is 61.8%IACS after testing, and tensile strength is 109MPa, and elongation at break is 20.5%.

Although with reference to explanatory embodiment of the present invention, invention has been described here, above-described embodiment is only preferably execution mode of the present invention, embodiments of the present invention are not restricted to the described embodiments, should be appreciated that, those skilled in the art can design a lot of other modification and execution modes, and these are revised and within execution mode will drop on the disclosed principle scope and spirit of the application.

Claims

1. a creep-resisting, corrosion-resisting aluminium alloy conductor, is characterized in that comprising the component of following weight percentage: Si, 0.03-0.15%; Cu, 0.01-0.25%; Zr, 0.02-0.45%; Fe, 0.3-0.9%; Mg, 0.001-0.012%; B, 0.001-0.015%; Rare earth element, 0.03-0.20%; Surplus is aluminium and inevitable impurity.

2. creep-resisting, corrosion-resisting aluminium alloy conductor according to claim 1, is characterized in that: described rare earth element is one or more in lanthanide series.