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

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 ...

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.

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