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Preparation method of ultra-high conductivity aluminum alloy wire for power transmission system

A power transmission system, aluminum alloy wire technology, applied in the direction of metal/alloy conductors, rods/rods/lines/strip conductors, etc., can solve the problems of power loss and line voltage reduction in transmission lines

Active Publication Date: 2016-01-20
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN102041418A discloses a method for manufacturing a medium-strength aluminum alloy wire with a conductivity of 57%. Although the tensile strength is ≥245MPa, its conductivity is only 57%. If it is widely used on the line, it will inevitably cause a huge loss of power transmission line. , resulting in a substantial drop in line voltage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Select aluminum ingots with a purity greater than or equal to 99.9%, silicon, iron, manganese, magnesium, gallium, and tin respectively select aluminum-silicon master alloys, aluminum-iron master alloys, aluminum-manganese master alloys, aluminum-magnesium master alloys, metal gallium and aluminum-tin master alloys The form of mixed rare earths composed of lanthanum, cerium, samarium, gadolinium, yttrium and neodymium and pure aluminum ingots are smelted into rare earth aluminum ingot mixed intermediates in crucibles, of which mixed rare earths account for 6% of the mixed intermediates; aluminum ingot smelting : put the aluminum ingot into the vertical melting furnace heated to 850-880 ℃ to melt into aluminum liquid, then transfer it to the holding furnace heated to 780 ℃; add the mixed intermediate when it is heated to 790 ℃, aluminum silicon The alloying temperature of master alloys, aluminum-iron master alloys, aluminum-manganese master alloys, aluminum-magnesium mast...

Embodiment 2

[0029] Select aluminum ingots with a purity greater than or equal to 99.9%, silicon, iron, manganese, magnesium, gallium, and tin respectively select aluminum-silicon master alloys, aluminum-iron master alloys, aluminum-manganese master alloys, aluminum-magnesium master alloys, metal gallium and aluminum-tin master alloys The form of mixed rare earths composed of lanthanum, cerium, samarium, gadolinium, yttrium and neodymium and pure aluminum ingots are smelted into rare earth aluminum ingot mixed intermediates in crucibles, of which mixed rare earths account for 8% of the mixed intermediates; aluminum ingot smelting : Put the aluminum ingot into the vertical melting furnace heated to 860°C and melt it into molten aluminum, then transfer it to the holding furnace heated to 760°C; add the mixed intermediate when it is heated to 785°C, aluminum-silicon master alloy , Al-Fe master alloy, Al-Mn master alloy, Al-Mg master alloy, gallium metal and Al-Sn master alloy are alloyed at a ...

Embodiment 3

[0031]Select aluminum ingots with a purity greater than or equal to 99.9%, silicon, iron, manganese, magnesium, gallium, and tin respectively select aluminum-silicon master alloys, aluminum-iron master alloys, aluminum-manganese master alloys, aluminum-magnesium master alloys, metal gallium and aluminum-tin master alloys The form of mixed rare earths composed of lanthanum, cerium, samarium, gadolinium, yttrium and neodymium and pure aluminum ingots are smelted into rare earth aluminum ingot mixed intermediates in crucibles, of which mixed rare earths account for 8% of the mixed intermediates; aluminum ingot smelting : Put the aluminum ingot into the vertical melting furnace heated to 870°C and melt it into aluminum liquid, then transfer it to the holding furnace heated to 760°C; add the mixed intermediate when it is heated to 790°C, aluminum-silicon master alloy , Al-Fe master alloy, Al-Mn master alloy, Al-Mg master alloy, gallium metal and Al-Sn master alloy are alloyed at a t...

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Abstract

The invention relates to a super-high-conductivity aluminum alloy conductor for a power transmission system and a preparation method thereof. The aluminum alloy comprises the following components in percentage by weight: 0.14-0.3% of Si, 1.1-1.3% of Fe, 0.25-0.4% of Mn, 0.03-0.045% of Mg, 0.1-0.2% of Ga, 0.02-0.04% of Sn, 0.01-0.03% of mixed rare earth element RE and the balance of aluminum and inevitable impurity elements, wherein the mixed rare earth element comprises the following components: 20-30% of lanthanum, 20-30% of cerium, 10-20% of samarium, 10-20% of gadolinium, 5-10% of yttrium and 5-10% of neodymium. The aluminum alloy has super high conductivity and excellent tensile strength and tensile property.

Description

technical field [0001] The invention relates to the technical field of transmission line wires in the electric power industry, in particular to an ultra-high conductivity aluminum alloy wire used in a power transmission system and a preparation method thereof. Background technique [0002] Due to the limitation of heat resistance, the steel-cored aluminum stranded wires used in overhead transmission lines mostly use heat-resistant aluminum alloy wires. In order not to reduce the strength and increase the sag of the wire during long-term operation at normal operating temperature, trace alloy elements such as zirconium and titanium are usually added to electrical pure aluminum to increase the recrystallization temperature of aluminum to improve the heat resistance of aluminum. However, although the addition of zirconium and titanium alloy elements ensures heat resistance, it causes a decrease in the conductivity of the aluminum wire. The conductivity of the heat-resistant alu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C1/03C22F1/04H01B1/02H01B5/02
Inventor 裴玉杰张运山方勃孙洪新朱强赵文超左颖穆景龙
Owner STATE GRID CORP OF CHINA