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Method for preparing copper magnesium alloy contact wire

A technology of copper-magnesium alloy and contact wire, which is applied in the manufacture of metal/alloy conductors, overhead wires, cables/conductors, etc., can solve the problems that contact wire defects cannot be eliminated, and achieve excellent mechanical and electrical properties and good performance uniformity , low production and use loss

Active Publication Date: 2010-05-19
CHINA RAILWAY CONSTR ELECTRIFICATION BUREAUGRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cold working cannot change the as-cast metallographic structure, so the contact line defects caused by the as-cast structure of coarse grains cannot be eliminated

Method used

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  • Method for preparing copper magnesium alloy contact wire
  • Method for preparing copper magnesium alloy contact wire

Examples

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preparation example Construction

[0020] like figure 1 as shown, figure 1 It is a flowchart of the realization of the preparation method of the copper-magnesium alloy contact wire according to the present invention, which specifically includes the following steps:

[0021] Step 101: Smelting the copper-magnesium alloy; various appropriate smelting methods can be used, and the copper liquid is covered with graphite and charcoal. The way of adding magnesium element can be copper-magnesium master alloy or directly adding pure magnesium to the smelting furnace by weight.

[0022] Step 102: Prepare continuous copper-magnesium alloy oxygen-free casting rods; prepare copper-magnesium alloy oxygen-free casting rods by upward continuous casting or horizontal continuous casting. The diameter of the copper-magnesium alloy anaerobic casting rod is 16-24mm.

[0023] Step 103: Feed the copper-magnesium alloy anaerobic casting rod into the continuous extrusion machine for continuous extrusion, the as-cast structure of the...

Embodiment 1

[0027] The concrete steps of method embodiment one of the present invention are as follows:

[0028] 1) Carry out non-vacuum copper-magnesium alloy melting. The electrolytic copper smelting is carried out in an electromagnetic furnace, the copper liquid is covered with flake graphite, and the copper-magnesium master alloy is added according to the set composition, so that the magnesium element in the furnace accounts for 0.4% to 0.5% of the total weight, and the rest is copper.

[0029] 2) The copper-magnesium alloy oxygen-free casting rod was prepared by upward continuous casting, and the diameter of the produced copper-magnesium alloy oxygen-free casting rod was 20 mm.

[0030] 3) Send the produced copper-magnesium alloy anaerobic casting rod into the Kangfu extrusion machine for continuous extrusion, and the diameter of the extruded copper-magnesium alloy contact wire rod billet is 30mm.

[0031] 4) The extruded copper-magnesium alloy contact wire billet is cold-rolled, an...

Embodiment 2

[0034] The concrete steps of method embodiment two of the present invention are as follows:

[0035] 1) Carry out non-vacuum copper-magnesium alloy melting. The electrolytic copper smelting is carried out in an electromagnetic furnace, the copper liquid is covered with flake graphite, and the copper-magnesium master alloy is added according to the set composition, so that the magnesium element in the furnace accounts for 0.4% to 0.5% of the total weight, and the rest is copper.

[0036] 2) The copper-magnesium alloy oxygen-free casting rod was prepared by upward continuous casting, and the diameter of the produced copper-magnesium alloy oxygen-free casting rod was 20mm.

[0037] 3) Send the produced copper-magnesium alloy anaerobic casting rod into the Kangfu extrusion machine for continuous extrusion, and the diameter of the extruded copper-magnesium alloy contact wire rod billet is 30mm.

[0038] 4) The extruded copper-magnesium alloy contact wire billet is subjected to mul...

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Abstract

The invention discloses a method for preparing a copper magnesium alloy contact wire. In the method, an as-cast copper magnesium alloy structure is broken by continuous extrusion and is re-crystallized to obtain a tiny and even grain structure so as to make the copper magnesium alloy contact wire have the super fine-grain strengthening effect. The method comprises production process flows of continuous casting, continuous extrusion and cold machining molding. Compared with the conventional production process for the copper magnesium alloy contact wire, the method ensures that as-cast grains of an oxygen-free copper magnesium alloy casting pole molded by continuous casting are broken by the continuous casting and continuous extrusion processes, and are re-crystallized under the action of thermal deformation to form a copper magnesium alloy contact wire pole blank having a fine-grain structure, and the pole blank is subjected to cold machining to prepare the high-strength copper magnesium alloy contact wire having the super fine-grain strengthening effect. The production process is simple and reliable, and yield and quality completely meet the requirements of the conventional high-speed electrified railways.

Description

technical field [0001] The invention relates to the technical field of power supply wires, in particular to a method for preparing a copper-magnesium alloy contact wire. Background technique [0002] The electrified railway contact wire is one of the power supply wires used in the worst working environment. Its rated working tension is relatively high, and it is constantly impacted and rubbed by the pantograph during long-term operation, and it needs to endure arc ablation and temperature changes. And the impact of the environment, so the contact wire is required to have high tensile strength, good wear resistance and electrical conductivity. In practical applications, issues such as the production cost and production capacity of wire rods must also be considered. Copper alloy contact wires are used in high-speed railways. At present, copper-magnesium alloy contact wires are basically used in the construction of high-speed electrified railways above 300km / h in my country. ...

Claims

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Application Information

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IPC IPC(8): H01B13/00H01B5/02H01B1/02B60M1/13
Inventor 张曙光王保国郑斌王祖峰寇宗乾孟宪浩郭志光万传军汪友顺李学斌张强陈希康刘轶伦冯岳军刘实侯晓俊
Owner CHINA RAILWAY CONSTR ELECTRIFICATION BUREAUGRP
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