Graphene copper-magnesium alloy contact line and preparation method thereof

A copper-magnesium alloy and graphene technology is applied in the field of graphene-copper-magnesium alloy contact wires and their preparation to achieve the effect of reducing power transmission loss

Active Publication Date: 2020-01-10
北京石墨烯技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the traditional copper-magnesium alloy contact wire is difficult to achieve both high strength and high conductivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] In an embodiment of the present invention, a method for preparing a graphene copper-magnesium alloy contact wire is provided, comprising the following steps:

[0032] S100: Provide graphene copper-magnesium alloy powder;

[0033] S200: Sintering the graphene copper-magnesium alloy powder into a graphene copper-magnesium alloy ingot by hot isostatic pressing;

[0034] S300: making the graphene copper-magnesium alloy ingot blank into a rod blank;

[0035] S400: Continuously extruding the billet to obtain a graphene copper-magnesium alloy rod;

[0036] S500: cold drawing the graphene copper-magnesium alloy rod according to a predetermined size and shape to obtain a graphene copper-magnesium alloy contact wire;

[0037] Wherein, the graphene is mixed with other components in the form of powder, and in the graphene copper-magnesium alloy powder, the mass percentage of graphene is 0.01%-0.20%.

[0038] The preparation method of the graphene copper-magnesium alloy contact w...

Embodiment 1

[0076] (1) Under atmospheric conditions, magnesium ingots are added to the copper melt at 1200°C (the mass ratio of copper melt to magnesium ingot is 995:4) to obtain a copper-magnesium alloy melt, and then the copper-magnesium alloy is melted The melt is transferred to an atomizing furnace, and under nitrogen protection conditions, the melt is atomized with high-pressure nitrogen, and then classified by a cyclone to select powders with a particle size between 10 μm and 70 μm to obtain copper-magnesium pre-alloyed powder.

[0077] (2) 999 parts by mass of copper-magnesium pre-alloy powder and 1 part by mass of graphene powder were subjected to ultrasonication in alcohol for 15 minutes, the ultrasonic power was 2 kW, and the ultrasonic frequency was 20 kHz, followed by stirring and mixing for 3 hours, wherein alcohol and copper-magnesium alloy pre-powder The mass ratio is 1:3; then suction filtration, and vacuum drying at 60° C. for 20 hours to obtain graphene copper-magnesium a...

Embodiment 2

[0085] Basically the same as Example 1, the difference is that in step (1), the mass ratio of copper melt to magnesium ingot is 995.5:4; step (2) adopts 999.5 mass parts of copper-magnesium pre-alloyed powder and 0.5 mass parts of graphene powder.

[0086] In the graphene copper-magnesium alloy contact wire in this embodiment, the mass percentage of graphene is 0.05%, the mass percentage of magnesium is 0.4%, and the rest is copper.

[0087] The graphene copper-magnesium alloy contact wire was tested for performance, and the test results are shown in Table 1.

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Abstract

The invention relates to a preparation method of a graphene copper-magnesium alloy contact line. The preparation method of the graphene copper-magnesium alloy contact line includes following steps: providing powder of graphene copper-magnesium alloy; adopting hot isostatic pressing to sinter the powder of the graphene copper-magnesium alloy into a graphene copper-magnesium alloy ingot blank; manufacturing the graphene copper-magnesium alloy ingot blank into a rod blank; performing continuous extrusion on the rod blank, and obtaining a graphene copper-magnesium alloy rod material; and performing cold drawing on the graphene copper-magnesium alloy rod material according to preset size and a preset shape, and obtaining the graphene copper-magnesium alloy contact line, wherein graphene is added in a powder type, and weight percentage content of the graphene is 0.01%-0.20% in the powder of the graphene copper-magnesium alloy. The invention further discloses the graphene copper-magnesium alloy contact line prepared by using the method. The graphene copper-magnesium alloy contact line has tensile strength at 520-580Mpa, has electric conductivity at 75-80%IACS (international annealed copper standard), can simultaneously meet requirements of a high speed railway for the high strength and the high electric conductivity of the contact network guide line, and effectively reduces power transmission loss.

Description

technical field [0001] The invention relates to the field of power supply wires, in particular to a graphene copper-magnesium alloy contact wire and a preparation method thereof. Background technique [0002] The contact wire, also known as the trolley wire, is an important part of the electrified railway catenary. The contact wire directly transmits current to the electric locomotive through sliding friction with the pantograph slide plate on the electric locomotive, and its performance directly affects the current quality of the electric locomotive and safe operation of locomotives. The contact wire is the worst working environment among all power supply wires. It needs to withstand shock, vibration, temperature difference change, environmental corrosion, abrasion, spark ablation and great working tension during normal work, so its performance directly affects Safe operation of high-speed trains. In order to meet the needs of electrified railway catenary, the contact wir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/15B22F9/08C22C1/05C22C9/00C22C1/10B21C37/04
CPCB21C37/045B22F3/15B22F9/082B22F2009/0824C22C1/05C22C9/00
Inventor 张海平李炯利孙庆泽曹振王旭东
Owner 北京石墨烯技术研究院有限公司
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