Heat resistant aluminum alloy conductor material and preparation method thereof

An aluminum alloy conductor, heat-resistant technology, applied in the direction of metal/alloy conductor, cable/conductor manufacturing, metal rolling, etc., can solve the problems of unproven beneficial effect of heat resistance, difficulty in continuous production, reduction of electrical conductivity, etc. , to reduce production costs, inhibit recrystallization, and improve heat resistance

Active Publication Date: 2011-11-02
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Er is a hotspot in the research of aluminum alloy microalloying. Chinese patent CN 101418401B discloses an Al-Er alloy wire material, which shows that adding an appropriate amount of Er to pure aluminum can increase the hardness of the alloy while maintaining a high electrical conductivity. However, The patent does not demonstrate the beneficial effect of Er on heat resistance
Zr is the most commonly used microalloying element in heat-resistant aluminum conductor materials. Chinese patent CN 1924053A discloses a high-conductivity super-heat-resistant aluminum alloy wire containing Zr. The amount of Zr added is several times that of ordinary heat-resistant alloy wires. When the addition of Zr is too high, the conductivity will be significantly reduced, and part of the solid solution Zr can be precipitated by long-term heat treatment, forming a dispersed Al in the matrix. 3 Zr metal compound can reduce the harmful effect of Zr on conductivity and improve heat resistance. Therefore, the production of the high-conductivity super heat-resistant aluminum alloy wire must be heat-treated at a certain temperature for a long time, and the energy consumption is high and it is difficult to achieve continuous production. Production

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  • Heat resistant aluminum alloy conductor material and preparation method thereof
  • Heat resistant aluminum alloy conductor material and preparation method thereof
  • Heat resistant aluminum alloy conductor material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Using industrial pure aluminum ingots with a purity greater than 99.7% (where Fe<0.15%, Si<0.05%), Al-11.34% Zr master alloy, Al-4.7% Er master alloy and Al-5.0% Fe master alloy as raw materials, first Put industrial pure aluminum into a melting furnace to melt, keep the alloy liquid at 750°C-760°C, add aluminum-zirconium master alloy, aluminum-erbium master alloy and aluminum-iron master alloy, so that the mass percentage of each element is: zirconium is 0.06%, erbium is 0.29%, iron is 0.12%, silicon is 0.03%, the sum of impurity elements such as titanium, vanadium, chromium, manganese is 0.0058%, and aluminum is the balance. After the intermediate alloy is completely melted, stir, lower the alloy melt to 730°C and keep it warm, then carry out stirring, refining, standing, and slag removal in sequence, and obtain the heat-resistant aluminum alloy conductor material through continuous casting and rolling, wherein the rolling temperature is 530°C °C, the finish rolling t...

Embodiment 2

[0026] Using industrial pure aluminum ingots with a purity greater than 99.7% (where Fefigure 1 It is the transmission electron microscope observation structure of the alloy of Example 2. It can be seen from the figure that there are nano-scale second phases distributed on the matrix of the alloy material. Compared with the solid solution state, the presence of microalloying elements in this form has an impact on the conductivity of the alloy. The impact is much smaller, and at the same time, the heat resistance of the material can be greatly improved.

[0027] Table 2 Evaluation table of comprehensive performance of heat-resistant aluminum alloy conductor material

[0028]

Embodiment 3

[0030] Using industrial pure aluminum ingots with a purity greater than 99.7% (where Fe<0.15%, Si<0.05%), Al-11.34% Zr master alloy, Al-4.7% Er master alloy and Al-5.0% Fe master alloy as raw materials, first Put industrial pure aluminum into a melting furnace to melt, keep the alloy liquid at 750°C-760°C, add aluminum-zirconium master alloy, aluminum-erbium master alloy and aluminum-iron master alloy, so that the mass percentage of each element is: zirconium is 0.15%, erbium 0.15%, iron 0.16%, silicon 0.03%, the sum of titanium, vanadium, chromium, manganese and other impurity elements is 0.063%, aluminum is the balance. After the intermediate alloy is completely melted, stir, lower the alloy melt to 730°C and keep it warm, then carry out stirring, refining, standing, and slag removal in sequence, and obtain the heat-resistant aluminum alloy conductor material through continuous casting and rolling, wherein the rolling temperature is 480°C °C, the finish rolling temperature i...

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Abstract

The invention provides a heat resistant aluminum alloy conductor material and a preparation method thereof. The heat resistant aluminum alloy conductor material comprises the following components of 0.06-0.15 % of zirconium, 0.15-0.30 % of erbium, 0.10-0.20 % of iron, less than 0.05 % of silicon, less than 0.01 % of inevitable impurities like titanium, vanadium, chromium, manganese and the like and the balance of aluminum. According to the preparation method, the heat resistant aluminum alloy conductor material is directly rolled after each component is fused and cast. The conductor material can realize that the electric conductivity can reach 59.5-60.5 % IACS (International Association Of Classification Societies), the long-term heat resistance temperature can reach 180 DEG C and the short-term heat resistance temperature can reach 210 DEG C without heat treatment; therefore, the conductor material is an electric wire and cable conductor material with great potential. The conductor material can be widely used for construction and capacity expansion reconstruction of electric power engineering; and by using the conductor material, the transmission line capacity is largely increased, the transmission line loss is reduced, the distance between poles of the transmission line can be increased, the line building cost is reduced, the tense corridor resources are saved and obvious economic benefit and energy-saving and environment-friendly significance are obtained. The heat resistant aluminum alloy conductor material provided by the invention has the advantages of reasonable component mixing ratio, simple preparation process, convenience for realizing continuous production and suitability for industrial application; and the production cost and the energy consumption of the heat resistant aluminum alloy can be effectively reduced.

Description

technical field [0001] The invention relates to a conductor material for electric wires and cables, in particular to a heat-resistant aluminum alloy conductor material and a preparation method thereof, belonging to the technical field of alloy materials. Background technique [0002] With the increase of power grid load, power transmission is developing in the direction of high voltage, large capacity, and long distance, which puts forward strict requirements on the transmission wire. Transmission efficiency, on the other hand, requires that the transmission wire has good heat resistance and anti-sag characteristics, so as to reduce the cost of line construction and save the tight corridor resources. However, the conductivity and heat resistance of aluminum conductor materials are a pair of contradictions, and the two are often caught in the dilemma of trade-offs, which is the technical bottleneck for the development of heat-resistant aluminum conductor materials. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/03C22F1/04B21B1/46H01B1/02H01B13/00
Inventor 李红英宾杰巫荣海
Owner CENT SOUTH UNIV
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