High-strength and abrasion resisting copper alloy contact wire and preparation technology thereof

A wear-resistant copper and contact wire technology, used in overhead lines and other directions, can solve the problems of inability to industrialize mass production, difficult to meet requirements, limited output, etc., and achieve improved strength and thermal stability, improved electrical conductivity, and grain boundary area. added effect

Inactive Publication Date: 2019-03-22
SHANDONG YANGGU CABLE GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This means that the matching contact wire material performance-strength and electrical conductivity must be further improved, and the existing contact wire materials are still difficult to meet the requirements
Patent application 2007101955236 discloses a copper alloy contact wire and its preparation method, using internal redox method to prepare Cu-Al 2 o 3 alloy powder, and then sintered and drawn to prepare copper alloy contact wires; although this preparation method carries out dispersion strengthening on copper alloys, an oxygen source needs to be prepared in the preparation, the operation is complicated, and the cost is high. Although the copper alloy contact wires prepared by this method Compared with the existing contact wire, the strength has been improved, but the output is limited, and it cannot be mass-produced industrially

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The high-strength wear-resistant copper alloy contact wire is composed of: Cr 0.10%, Zr 0.10%, Al 2 o 3 0.10%, Re 0.01%, copper 99.61%, unavoidable impurities 0.08%.

[0044] The preparation process of the above-mentioned high-strength wear-resistant copper alloy contact wire includes the following steps:

[0045](1) Preparation of alloy products

[0046] The melting temperature is 1150-1250°C. After the cathode copper is completely melted in the smelting furnace, it is filled with N 2 , N 2 The gas flow rate is 20L / min; the surface of the melting furnace is covered with a layer of flake graphite and charcoal, and then the alloy is added; the order of alloy addition is as follows: add Cr and Zr master alloys first, add Re master alloy after the Cr and Zr master alloys are melted, and finally add Cu-Al 2 o 3 Alloy; holding temperature is 1100-1200°C, holding time > 15min;

[0047] (2) Semi-solid treatment

[0048] After the heat preservation of the liquid alloy p...

Embodiment 2

[0064] The high-strength wear-resistant copper alloy contact wire is composed of: Cr 0.10%, Zr 0.10%, Al 2 o 3 0.10%, Re 0.30%, copper 99.32%, unavoidable impurities 0.08%.

[0065] The preparation process of the above-mentioned high-strength wear-resistant copper alloy contact wire includes the following steps:

[0066] (1) Preparation of alloy products

[0067] The melting temperature is 1150-1250°C. After the cathode copper is completely melted in the smelting furnace, it is filled with N 2 , N 2 The gas flow rate is 20L / min; the surface of the melting furnace is covered with a layer of flake graphite and charcoal, and then the alloy is added; the order of alloy addition is as follows: add Cr and Zr master alloys first, add Re master alloy after the Cr and Zr master alloys are melted, and finally add Cu-Al 2 o 3 Alloy; holding temperature is 1100-1200°C, holding time > 15min;

[0068] (2) Semi-solid treatment

[0069] After the heat preservation of the liquid alloy ...

Embodiment 3

[0085] The high-strength wear-resistant copper alloy contact wire is composed of: Cr 0.10%, Zr 0.10%, Al 2 o 3 0.01%, Re 0.01%, copper 99.70%, unavoidable impurities 0.08%.

[0086] The preparation process of the above-mentioned high-strength wear-resistant copper alloy contact wire includes the following steps:

[0087] (1) Preparation of alloy products

[0088] The melting temperature is 1150-1250°C. After the cathode copper is completely melted in the smelting furnace, it is filled with N 2 , N 2 The gas flow rate is 20L / min; the surface of the melting furnace is covered with a layer of flake graphite and charcoal, and then the alloy is added; the order of alloy addition is as follows: add Cr and Zr master alloys first, add Re master alloy after the Cr and Zr master alloys are melted, and finally add Cu-Al 2 o 3 Alloy; holding temperature is 1100-1200°C, holding time > 15min;

[0089] (2) Semi-solid treatment

[0090] After the heat preservation of the liquid alloy ...

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Abstract

The invention relates to the field of copper alloy technical processing, in particular to a high-strength and abrasion resisting copper alloy contact wire and a preparation technology thereof. The high-strength and abrasion resisting copper alloy contact wire is prepared from the raw materials in percentage by weight: 0.01-0.30% of a rare earth element, 0.01-0.10% of a metallic oxide, and the balance of the copper alloy. The preparation method comprises alloy product preparation, semi-solid state treatment, horizontal continuous casting, continuous extrusion, first cold working, solution treatment, second cold working, two-stage aging, and drawing forming. The high-strength and abrasion resisting copper alloy contact wire has good electrical conductivity, high strength, high high-temperature resistance, and abrasion resistance, and can be used as a contact wire material for high speed railways, especially for a high-speed railway with speed of more than 400 kilometers per hour.

Description

technical field [0001] The invention relates to the technical processing field of contact wires, in particular to a high-strength wear-resistant copper alloy contact wire and a preparation process thereof. Background technique [0002] With the development of electrified railways in the direction of high-speed and heavy-duty, more stringent requirements are put forward for the performance of contact wires. The new contact wires must not only have excellent electrical conductivity, but also have better wear resistance, high temperature softening resistance and tensile strength. At present, the conductor materials used in high-speed rail contact lines mainly include Cu-Mg, Cu-Sn, Cu-Ag, Cu-Sn-Ag, Cu-Ag-Zr, Cu-Cr-Zr and other series of Cu alloys, among which Cu-Cr- Zr shows a more excellent comprehensive performance of strength and conductivity, but these contact wire materials have not solved the contradiction between strength and conductivity well. Materials with good conduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C1/02B22D11/045C22F1/08B21C37/04B60M1/13
CPCB21C37/045B22D11/045B60M1/13C22C1/02C22C9/00C22F1/002C22F1/08
Inventor 王扬虎张剑孙庆伦高宪武王继然朱振峰张继翔李广省
Owner SHANDONG YANGGU CABLE GROUP
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