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A kind of aluminum-carbon composite material for tensile joint fittings and its preparation method

A technology for connecting fittings and raw materials, which is applied in the field of aluminum-carbon composite materials for tension-resistant connecting fittings and its preparation, can solve problems such as rising resistivity of fittings, rising temperature, and deterioration of working characteristics of fittings, and achieve long-term stability and improvement of resistance value The effect of increasing material strength and hardness

Active Publication Date: 2019-04-09
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, the main problem with alloy strengthening is that with the prolongation of operation time, intermetallic compounds will inevitably form and grow between aluminum and these alloy elements, resulting in an increase in the resistivity of the metal fittings, a further rise in temperature, and deterioration of the working characteristics of the metal fittings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A corrosion-resistant splicing fitting material, the mass percentage of each component is: graphite carbon powder 7.0%, and the balance is aluminum. The total amount of impurities iron, silicon and other impurities is 1.5%.

[0049] The selected raw materials are: graphite carbon powder with a carbon content of 99.9% and 7.0%, brand FLPN320.0 aluminum powder (nitrogen atomized aluminum powder, average particle size 32 μm), and the balance of Al99.70E brand electrical aluminum ingot. The total amount of impurities iron, silicon and other impurities is 0.3%.

[0050] Prepare aluminum-graphite powder blocks. Stir and dissolve graphite carbon powder in industrial alcohol in a container, put it into an ultrasonic cleaner to vibrate and disperse evenly, then add FLPN320.0 pure aluminum powder that is 1 times the weight of graphite carbon powder, mechanically stir it evenly, and then put it into a planetary ball mill. Both the tank and the sphere are made of alumina ceramics...

Embodiment 2

[0059] A corrosion-resistant splicing fitting material, the mass percentage of each component is: graphite carbon powder 5.0%, and the balance is aluminum. The total amount of impurities iron, silicon and other impurities is 1.5%.

[0060] The selected raw materials are: graphite carbon powder with a carbon content of 99.9% and 5.0%, brand FLPN320.0 aluminum powder (nitrogen atomized aluminum powder, average particle size 32 μm), and the balance of electrical aluminum ingots of Al99.70E brand. The total amount of impurities iron, silicon and other impurities is 0.3%.

[0061] Preparation of aluminum-graphite powder block: Stir and dissolve graphite carbon powder in industrial alcohol in a container, put it into an ultrasonic cleaner to vibrate and disperse evenly, add FLPN320.0 pure aluminum powder twice the weight of graphite carbon powder, and mechanically After stirring evenly, put it into a planetary ball mill with a water-cooling system. The tank and the ball are made of...

Embodiment 3

[0070] A corrosion-resistant splicing fitting material, the mass percentage of each component is: graphite carbon powder 2.0%, and the balance is aluminum. The total amount of impurities iron, silicon and other impurities is 0.3%.

[0071] The selected raw materials are: 2.0% graphite carbon powder with a carbon content of 99.9%, FLPN320.0 aluminum powder (nitrogen atomized aluminum powder, average particle size 32 μm), and electrical aluminum ingots with Al99.70E as the balance. The total amount of impurities iron, silicon and other impurities is 0.3%.

[0072] Preparation of aluminum-graphite powder block: Stir and dissolve graphite carbon powder in industrial alcohol in a container, put it into an ultrasonic cleaner to vibrate and disperse evenly, add FLPN320.0 pure aluminum powder 3 times the weight of graphite carbon powder, and mechanically After stirring evenly, put it into a planetary ball mill with a water-cooling system. The tank and the ball are made of alumina cer...

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Abstract

The invention provides an aluminum-carbon composite material used for a tension-resisting joint fitting and a preparing method of the aluminum-carbon composite material. Aluminum powder and carbon powder dispersed in an organic solvent are evenly mixed, dried, subjected to ball grinding and pressed into an aluminum-carbon powder block; and the above aluminum-carbon powder block and an aluminum block are used as raw materials to be subjected to smelting, ingot casting, cogging and rolling, and a joint fitting material high in strength and resistant to loosening is obtained. The electric conductivity of the joint fitting prepared through the aluminum-carbon composite material is equivalent to that of pure aluminum. Due to the adding of carbon particles, the hardness, strength and high-temperature loosening resisting performance of the joint fitting are greatly improved. Due to the fact that carbon has very good stability in the atmosphere and does not form an alloy or a compound with aluminum, the corrosion resistance of aluminum is not obviously changed. Preparing steps are simple, operation is convenient, and practicability is high.

Description

technical field [0001] The invention belongs to the technical field of electrical materials, in particular to an aluminum-carbon composite material for tension-resistant joint fittings and a preparation method thereof. Background technique [0002] The increase of the voltage level, coupled with the complex and changeable external natural environment, causes overheating and corrosion of the connection fittings of the transmission line. Especially during the peak load period in summer, the thermal damage caused by the overheating of the crimping tube of the tension clamp and the diversion plate has become a prominent hidden danger to the safe operation of the power grid. The "Operation Regulations for Overhead Power Transmission Lines" (DL / T741) stipulates that the operating temperature of the strain clamp shall not be higher than the temperature of the wire (less than 70°C) by 10°C, and the relative temperature difference between the wire and the diversion device exceeds 35%...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/10C22C1/02C22C21/00
CPCC22C1/1036C22C21/00
Inventor 傅敏苏建军李辛庚王晓明岳增武陈素红
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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