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High-strength, high-conductivity and high-heat-resistance aluminum-base composite for tension joint splice and preparing method

An aluminum-based composite material and a technology for connecting metal fittings, which are applied in the field of high-strength, high-conductivity, and high-heat-resistance aluminum-based composite materials for connecting metal fittings and their preparation, can solve the problems of insufficient heat resistance, low alloy strength, etc., and achieve high production efficiency and agglomeration. Reduced, chemically stable effects

Active Publication Date: 2020-05-05
BEIJING GUOWANG FUDA SCI & TECH DEV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low strength and insufficient heat resistance of 1 series alloys used for connecting fittings, and provide a high-strength, high-conductivity, high-heat-resistant aluminum-based composite material for connecting fittings and its preparation method, which can improve the strength through traditional alloying technology At the same time, the application bottleneck problem of conductivity is greatly reduced. The preparation method of the present invention has simple process, low cost and strong designability, and is suitable for continuous large-scale production by water-cooled semi-continuous casting or continuous casting and rolling process.

Method used

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Experimental program
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Effect test

Embodiment 1

[0029] Alloy composition: Based on the alloy mass as 100%, reduced graphene oxide 0.09%, Zr 0.2%, Er 0.1%, Ti 0.001%, Fe 0.065%, Si ≤ 0.043, each of the remaining elements ≤ 0.01%, the balance is Al .

[0030] The preparation process and proportion of reduced graphene oxide@copper are as follows: prepare KH-550 silane coupling agent solution, the volume ratio of alcohol to water is 10:1, the content of KH-550 in the solution is 0.9vol.%, and it is dissolved for 4 hours; Add graphene oxide to the solution to make the graphene oxide concentration 0.1g / L, then add nano-copper powder for ultrasonic treatment for 60min, the particle size of nano-copper powder is 5nm. Hydrogen reduction sintering, the sintering temperature is 1200°C, and the time is 5 hours, and the reduced graphene oxide@copper composite powder is obtained.

[0031] Clean the furnace before starting the furnace. If alloys other than 1 series have been produced before, it is necessary to arrange for furnace cleaning ...

Embodiment 2

[0033] Alloy composition: Based on the alloy mass as 100%, reduced graphene oxide 0.01%, Zr 0.2%, Er 0.2%, Ti 0.008%, Fe 0.070%, Si 0.045%, the remaining elements are ≤0.01% each, and the balance is Al .

[0034] The preparation process and proportion of pre-synthesized reduced graphene oxide@copper are as follows: prepare KH-550 silane coupling agent solution, the volume ratio of alcohol and water is 1:12, the content of KH-550 in the solution is 0.1vol.%, and it is dissolved for 4 hours Add graphene oxide in the solution so that the graphene oxide concentration is 0.5g / L, then add nano-copper powder for ultrasonic treatment for 30min, the particle size of nano-copper powder is 30nm, and the mixed solution obtained is oxidized after vacuum freeze-drying Graphene hydrogen reduction sintering, sintering temperature 1200 ° C, time 1 hour, obtained reduced graphene oxide@copper composite powder.

[0035] Clean the furnace before starting the furnace. If alloys other than 1 serie...

Embodiment 3

[0037] Alloy composition: Based on the alloy mass as 100%, reduced graphene oxide 0.05%, Zr 0.1%, Er 0.1%, Ti 0.009%, Fe 0.068%, Si 0.043%, each of the remaining elements ≤ 0.01%, the balance is Al .

[0038] The preparation process and proportion of pre-synthesized reduced graphene oxide@copper are as follows: prepare KH-550 silane coupling agent solution, the volume ratio of alcohol to water is 7:5, the content of KH-550 in the solution is 0.5vol.%, and it is dissolved for 6 hours Add graphene oxide in the solution so that the graphene oxide concentration is 0.5g / L, then add nano-copper powder for ultrasonic treatment for 40min, the particle size of nano-copper powder is 20nm, and the mixed solution obtained is oxidized after vacuum freeze-drying Graphene hydrogen reduction sintering, sintering temperature 1000 ° C, time 3 hours, to obtain reduced graphene oxide@copper composite powder.

[0039] Clean the furnace before starting the furnace. If alloys other than 1 series ha...

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Abstract

The invention provides a high-strength, high-conductivity and high-heat-resistance aluminum-base composite for a tension joint splice and a preparing method. Through the design of an aluminum-zirconium alloy base system, nano-copper grows on a graphene surface to serve as an enhancing phase, powder is blown by inert gas into an aluminum melt, and a cast structure with evenly-distributed graphene is obtained. The graphene has a unique two-dimensional wrinkled surface, surface-growing copper nanoparticles form graphene@copper, the wettability of the graphene and the aluminum melt is increased, particle refined grains as non-uniform nucleation have high chemical stability, and the particle refined grains and an Al3Zr phase jointly improve the heat stability of the aluminum-base composite. Bymeans of the composite, the problem that a limited one-series alloy tension joint splice is not sufficient in strength and heat resistance in the application process is solved, the aluminum-base composite produced through a casting method keeps the conductivity higher than 61% IACS, the strength is improved by 30% or above, and the heat resistance is improved by 20-40% or above.

Description

technical field [0001] The invention relates to a nano-phase reinforced aluminum-based composite material, in particular to a high-strength, high-conductivity, high-heat-resisting aluminum-based composite material for connecting fittings and a preparation method thereof. Background technique [0002] With the increase of the voltage level and the application of various new types of wires, the abnormal temperature rise of the tension connection fittings has become a major safety hazard affecting the operation of the line. According to statistics, in 2008, the temperature of tension clamps of 16 lines in Beijing area was between 43-150°C, which was 19-126°C higher than the temperature of adjacent conductors, 3% of which exceeded 120°C, and the highest reached 150°C, which greatly exceeded the " Overhead Power Transmission Line Operating Regulations (DLT / 741-2010) stipulates that "the operating temperature of the connection fittings and strain clamps shall not be higher than th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/03C22C1/06C22C1/10C22F1/04
CPCC22C21/00C22C1/1015C22C1/1036C22C1/06C22F1/04C22C1/1047
Inventor 邢兰俊冷金凤任玉锁徐德录李雅泊白建涛张磊常建伟
Owner BEIJING GUOWANG FUDA SCI & TECH DEV
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