A high-strength and corrosion-resistant aluminum-carbon-copper alloy grounding material

A corrosion-resistant, copper alloy technology, applied in the field of aluminum-carbon-copper alloy grounding materials, can solve the problems of low material strength, difficult to drive, unsuitable for vertical grounding electrodes, etc., to improve material strength, improve hardness and strength, good The effect of soil corrosion resistance

Active Publication Date: 2017-12-12
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its low material strength, it is not easy to penetrate into relatively solid ground, so it is not suitable for use as a vertical ground electrode.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A corrosion-resistant grounding material, the mass percentage of each component is: copper 2.5%, carbon powder 7.0%, iron 0.8%, silicon 1.0%, and the balance is aluminum.

[0026] Melting aluminum-carbon-copper alloy ingot: Put the aluminum ingot into the crucible of the medium-frequency induction melting equipment, heat it up to 690°C and keep it warm. After the aluminum ingot is completely melted, press the aluminum-copper intermediate alloy with the graphite bell jar according to the above ratio. Raise the temperature to 780°C, wait until the molten pool is fully melted, carry out slag removal and stirring, take samples to analyze the composition and adjust the copper composition to be qualified, then refine, cool down to the pouring temperature, press the carbon powder block with a graphite bell jar according to the ratio of the specified content ( 2000-mesh carbon powder is pre-developed into a block), fully stirred until it is melted, and poured into an aluminum-ca...

Embodiment 2

[0030] A corrosion-resistant grounding material, the mass percentage of each component is: 7.5% of copper, 3.0% of flake graphite powder, 0.8% of iron, 1.0% of silicon, and the balance is aluminum.

[0031] Prefabricated copper-flake graphite powder master alloy block: According to the formula ratio of the materials, take 300 mesh pure copper powder and 2000 mesh flake graphite powder, stir them evenly and put them into a planetary ball mill with a water cooling system for grinding and mixing. The tank and sphere of the ball mill are made of alumina ceramics. Vacuum to 10 -1 After Pa, fill it with argon, control the temperature of the tank below 50°C, grind it at 200r / min for 1 hour, take it out and put it into a mold, and press it to a density of 4.0kg / m 3 ~6.5kg / m 3 , a cylindrical block with a diameter of D30mm×30mm, set aside.

[0032] Melting aluminum-carbon-copper alloy ingots: put the aluminum ingots into the crucible of the medium-frequency induction melting equipme...

Embodiment 3

[0036] A corrosion-resistant grounding material, the mass percentage of each component is: copper 3.0%, carbon powder 1.5%, iron 0.8%, silicon 1.0%, and the balance is aluminum.

[0037] Prefabricated copper-aluminum-carbon powder intermediate alloy block: according to the formula ratio of materials, take 300-mesh pure copper powder, 300-mesh pure aluminum powder and 2000-mesh carbon powder with the same weight as pure copper powder, mechanically stir them evenly and put them into the belt Grinding and mixing in planetary ball mill with water cooling system. The tank and sphere of the ball mill are made of alumina ceramics. Vacuum to 10 -1 Fill it with argon after Pa, control the temperature of the tank below 50°C, grind it at 200r / min for 1 hour, take it out and put it into a mold, and press it to a density of 3.5kg / m 3 ~5.0kg / m 3 , a cylindrical block with a diameter of D30mm×30mm, set aside.

[0038]Melting aluminum-carbon-copper alloy ingot: Put the aluminum ingot into...

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Abstract

A high-strength corrosion-resistant aluminum-carbon-copper alloy grounding material, including the following components in percentage by mass: 46％-62％ of aluminum, 2％-8％ of copper, 1％-30％ of carbon, impurities: iron <1.5％, silicon <1.5％, and others <1.0％. The corrosion resistance and grounding conductivity of the material are equivalent to those of pure copper. The addition of a carbon particle component improves the hardness and strength of the grounding material, the grounding material can be directly implanted in deep soil in bar form and used directly as a vertical ground, and the alloy has good soil corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of electrical materials, and is a grounding material for a buried grounding grid (body) of a power system, in particular to a high-strength, corrosion-resistant aluminum-carbon-copper alloy grounding material. Background technique [0002] The power system grounding device generally consists of horizontal grounding grids, vertical grounding electrodes and grounding down-conductors, which are necessary facilities to ensure the safety of power system equipment and personal safety. Horizontal grounding grids and grounding down conductors are laid and buried in excavated trenches, which do not require high strength; vertical grounding electrodes are driven into the deep ground by hammering, so the requirements for material strength are relatively high. At present, the grounding material mainly adopts cladding materials such as galvanized steel, pure copper, and copper-clad steel. [0003] The main problem of us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C21/14C22C21/12C22C30/02C22C1/03H01R4/66
CPCC22C1/03C22C21/00C22C21/12C22C21/14C22C30/02H01R4/66
Inventor 李辛庚苏建军傅敏樊志斌郭凯闫风洁李文静
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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