A processing technology of chrome-zirconium-copper contact wire for high-speed electrified railway

A technology of electrified railway and processing technology, which is applied in the direction of circuits, electrical components, conductive materials, etc., can solve the problems that cannot meet the requirements of electrified railway contact wire products, cannot realize continuous production of large length and large unit weight, and cannot realize industrialized production, etc. , to achieve the effects of fine grain size, consistent performance structure, and improved mechanical properties of the material

Active Publication Date: 2021-11-02
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 of Cr and Zr in the slab. There are still many problems such as high impurity content of cast slab, high content of gas elements, relatively coarse as-cast structure, etc., which reduce the performance of the alloy
The most important thing is that the continuous production of large length and large unit weight cannot be realized, the production efficiency is low, the production process is long, and the production cost is high, which cannot meet the product requirements of electrified railway contact wires.

Method used

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  • A processing technology of chrome-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 the vertical continuous casting machine. Leading and continuous casting to obtain an upward casting chromium-zirconium copper copper rod whose composition satisfies Cr: 0.8%, Zr: 0.09%, Cu: the balance, the copper content of the upward leading oxygen-free copper rod is more than 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 the vertical continuous casting machine. 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 ...

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Abstract

The invention discloses a process for processing chromium-zirconium copper contact wires for high-speed electrified railways, which is specifically carried out according to the following steps: continuous casting of chromium-zirconium copper rod blanks by upward drawing-continuous extrusion-solution heat treatment-continuous rolling-aging heat treatment-peeling Drawing to finished products, this process not only realizes the large-length and large-unit-weight industrial production of high-speed railway chromium-zirconium-copper contact wires, but also makes the product performance more excellent. Through continuous extrusion and rolling, the material structure is further refined and uniform, and the average grain The particle size is 10-50μm, the mechanical properties of the material are further improved, the tensile strength Rm is over 600Mpa, and the electrical conductivity is over 80% IACS. It has the advantages of stable quality and high material utilization rate, breaking a new path for the localization of chrome-zirconium-copper contact wire A new way, suitable for widespread promotion.

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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Patent Type & Authority Patents(China)
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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