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The Study on Industrialization of High-speed Railway Copper Alloy Contact Wire and Copper Flat Wire

Author: WuYuCai
Tutor: XieShuiSheng
School: Beijing Nonferrous Metal Research
Course: Materials Science
Keywords: Copper alloy Contact wire Copper alloy flat wire Copper clad steel wire Continuous casting and rolling continuous extrusion Numerical simulation Two feedstockto extrude four products
CLC: TG376
Type: PhD thesis
Year: 2012
Downloads: 233
Quote: 0
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As the electric train develops to high-speed and heavy haul, it require the material quality of contact wire to be finer and it promote contact wire develop constantly High strength and high conduct contact wire is the hot spot of research all the time because of its superior physical properties and mechanical properties. The research of superior performance contact wire that need to solve imperatively by the railway interests and factories. The drawing transformer winding of high-speed train has stricter requirements on the copper flat wire at the same time, so the research on copper flat wire is also one of hot spots. The content of this paper is some of the topic1(number:2007BAE23B01) which is the study on industrialization technology of Cu-Ag alloy contact wire and Cu-Sn alloy contact wire and the topic3(number:2007BAE23B03) which is the study on industrialization technology of continuous extrusion forming about copper alloy flat wire, topic1and topic3is belong of National Science and Technology Support Plan Program which is the study on industrialization technology in copper alloy contact wire only for high-speed railway (project number:2007BAE23B03).The key technology of copper alloy contact wire is that mastering the alloy formula of Cu-Ag alloy contact wire and Cu-Sn alloy contact wire by continuous casting and rolling processing; mastering whole technologies about of alloy configuration and equipment in continue manufacturing; mastering flexible production technology and equipment of producing copper alloy by continuous casting and rolling; Solve strengthening technology of producing copper alloy material by micro alloying technology. So it is satisfied with the requirement of high-speed railway in high strengthen and high conductivity material.The key technology of manufacture copper alloy bar by continuous extrusion and forming:The study focus on the distribution of temperature field、pressure field and the metal flow process,Create a new chamber structure, achieve the best combination of die and Chamber; Researche the copper clad steel wire based on the radial continuous extrusion.The main content and research fruit of the paper is that:(1) being finished with study on producing technologies and equipments of Cu-Ag alloy conduct material and Cu-Sn alloy conduct material, it mainly studied on industrialization technology such as copper alloy formula technology, micro alloying technology, strengthening technology, flexible production technology and so on, and studied on manufacturing technique, production quality, detecting on line and so on.(2) it comed up with firstly internal and achieved the manufacturing technique that manufacturing copper alloy conducting wire by "electromagnetic stirring+SCR continue casting and roll+cold draw/roll" process,and it applied the research fruit to manufacturing in factory. It manufactured copper alloy conducting wire13349.72ton (including:Cu-Ag alloy conducting wire8936.077ton, Cu-Sn alloy conducting wire4298.072ton), the sale revenue added up to RMB8.83billion yuan and it create profits RMB6181.75million yuan.According to the research on the two feedstock to extrude four products. The problem of small bore sectional bar and large width-thickness ratios bar with single groove CONFORM machine is settled. It is technically innovative.And to do continuous extrusion research in JL300type Conform machine in Yunnan Copper. By the way of adopt embed Super alloy in the key parts and create a new chamber structure, it improve the high temperature performance, also improve the chamber life. The production efficiency enhanced.A year after the completion of the subject, Total4821.905dun of copper alloy bar have been produced, sales revenue0.239billion yuan, over5.6million tax and over4.98million profit have been hand over.It get a good economic and social benefits.Numerical simulation of temperature field of copper flat wire continuous extrusion forming has been studied:The study focus on the distribution of temperature field、pressure field and the metal flow process was simulated. By the study develop High-performance die and Reasonable chamber structure; make innovations in die and machine.Study of Copper clad steel wire During Continuous ExtrusionThe study of copper clad steel wire mechanism of deformation process based on the radial continuous extrusion:Through the establishment of continuous extrusion clad research in JL350type continuous extrusion machine which was kungongmade, The experiment process contains the single wheel double grove and single wheel single grove clad. The study mainly focuses on:(1) The running clearance;(2) Steel and copper preheated and speed matching problem with extrusion wheel;(3) the process parameters of initial bite into the extrusion wheel.During the researching time the engineering problems of continuous extrusion clad possess is solved. Copper clad steel wire sample have been produced.

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal pressure processing > Extrusion > Extrusion process
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