Processing technology of chromium-zirconium-copper contact wire for high-speed electrified railway

A technology for electrified railways and processing technology, applied to circuits, electrical components, conductive materials, etc., can solve problems such as low production efficiency, high production cost, and long production process

Active Publication Date: 2020-10-20
SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitations of existing preparation material equipment and technology, the material contact line has not been able to achieve industrial production
[0004] At present, the main preparation methods of chromium-zirconium copper alloy are vacuum induction melting, semi-continuous casting and so on. Due to the limitation of smelting environment, the smelted chromium-zirconium copper alloy cannot effectively solve the problem of the distribution and uniformity of the main alloying elements o

Method used

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  • Processing technology of chromium-zirconium-copper contact wire for high-speed electrified railway

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A process for processing chromium-zirconium-copper contact wires for high-speed electrified railways, specifically carried out according to the following steps:

[0026] Step 1: Use upward continuous casting technology to obtain chromium-zirconium copper rods, use upward-oriented oxygen-free copper rods, copper-chrome core-covered wires, and copper-zirconium core-covered wires as raw materials, and cast chromium-zirconium copper rods on the upward vertical continuous casting machine Copper rods are drawn up and continuously cast to obtain upcast chromium-zirconium-copper copper rods whose composition satisfies Cr: 0.6%, Zr: 0.06%, and Cu: the balance, and the copper content of the uplinked oxygen-free copper rods is above 99.97%. , and the oxygen content is lower than 5ppm, and the uplifting speed is controlled to 1200mm / min, and the uplifting cast chromium-zirconium copper copper rod with a copper rod diameter of Φ25mm is selected as the copper rod disc round material; ...

Embodiment 2

[0034] The difference from the first embodiment is that:

[0035]Chromium-zirconium copper rods are obtained by adopting upward continuous casting technology. Using upward-oriented oxygen-free copper rods, copper-chrome core-covered wires, and copper-zirconium core-covered wires as raw materials, the chrome-zirconium copper rods are cast on vertical continuous casting machines. Leading and continuous casting to obtain an upward casting chromium-zirconium-copper copper rod whose composition satisfies Cr: 0.8%, Zr: 0.09%, and Cu: the balance. The copper content of the upward-leading oxygen-free copper rod is above 99.97%, and contains The oxygen content is lower than 5ppm, and the uplift speed is controlled at 800mm / min. The uplift casting chromium-zirconium copper copper rod with a copper rod diameter of Φ25mm is selected as the round material for the copper rod.

[0036] Get: the cross-sectional area is 121mm 2 , Tensile strength: 670Mpa, softening rate: 95%, elongation: 6%, ...

Embodiment 3

[0038] The difference from the second embodiment is that:

[0039] Chromium-zirconium copper rods are obtained by adopting upward continuous casting technology. Using upward-oriented oxygen-free copper rods, copper-chrome core-covered wires, and copper-zirconium core-covered wires as raw materials, the chrome-zirconium copper rods are cast on vertical continuous casting machines. Leading and continuous casting to obtain an upward casting chromium-zirconium-copper copper rod whose composition satisfies Cr: 1.0%, Zr: 0.2%, and Cu: the balance. The copper content of the upward-leading oxygen-free copper rod is above 99.97%, and contains The oxygen content is lower than 5ppm, and the uplift speed is controlled at 800mm / min. The uplift casting chromium-zirconium copper copper rod with a copper rod diameter of Φ30mm is selected as the round material for the copper rod.

[0040] Step 4: rolling the round rod material obtained from step 3 after solution heat treatment, and rolling the...

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Abstract

The invention discloses a processing technology of a chromium-zirconium-copper contact wire for a high-speed electrified railway. The method specifically comprises the following steps: upward continuous casting of a chromium-zirconium-copper rod blank, continuous extrusion, solid solution heat treatment, continuous rolling, aging heat treatment, peeling and drawing to obtain a finished product. According to the process, large-length and large-piece-weight industrial production of the chromium-zirconium-copper contact line of the high-speed railway is realized. The product performance is more excellent. The material structure is further refined and uniform through continuous extrusion and rolling. The average grain size is 10-50 [mu]m, the mechanical performance of the material is further improved, the tensile strength Rm reaches 600 Mpa or above, the conductivity is 80% IACS or above, the advantages of being stable and excellent in quality, high in material utilization rate and the like are achieved, a new way is provided for domestication of the chromium-zirconium-copper contact wire, and the method is suitable for wide popularization.

Description

technical field [0001] The invention relates to the field of processing and manufacturing chromium-zirconium-copper contact wires, in particular to a processing technology for chromium-zirconium-copper contact wires for high-speed electrified railways. Background technique [0002] High-speed railways have become the main development trend of electrified railways. So far, countries that have built high-speed electrified railways include China, Japan, France, Germany, Italy, Spain and Belgium. The speed target of my country's Beijing-Shanghai high-speed railway is 350km / h (total length 1300km), and the cost is 100 billion yuan. This speed is also the development trend of international high-speed electrified railways. The high-speed electrification of wheel and rail has very high performance requirements for contact wires. According to the requirements of high-speed trains for contact wires, developed countries in the world are developing their own high-speed railway contact ...

Claims

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Application Information

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IPC IPC(8): H01B13/00H01B1/02B22D11/00C22C9/00C22F1/08
CPCB22D11/004C22C9/00C22F1/002C22F1/08H01B1/026H01B13/00H01B13/0016H01B13/002
Inventor 王聪利庾高峰张航武旭红吴斌靖林
Owner SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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