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

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 ...

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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