高速铁路Cu-Cr-Zr合金承导线对连续挤压工艺的适应性

doi:10.11896/cldb.19070081

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Abstract In order to study the adaptability of continuous extrusion process for Cu-Cr-Zr alloy which was satisfied the content requirements of high-speed railway overhead contact lines, this alloy was processed with the TLJ500 continuous extrusion machine, and the microstructure of Cu-Cr-Zr alloy continuous extrusion rod was analyzed combine with the results of three-dimensional finite element numerical simulation. The constitutive equation of Cu-Cr-Zr alloy used for high-speed railway overhead contact lines was established on Arrhhenius hyperbolic sinusoidal function with the experimental results of high temperature thermal deformation simulation of this alloy. And the three-dimensional finite element analysis model of the Cu-Cr-Zr alloy was built up though the software platforms of UG and Deform 3D, the temperature field distribution and strain field distribution of its processing processes were simulated as well. The distributions of the second phase and microstructure of the Cu-Cr-Zr alloy extrusion rod were observed by, it was considered that the microstructure was obviously improved though continuous extrusion process combined with simulation results of physical field such as temperature field, strain field from the point of structure analysis views. Not only the fine-grained strengthening effects were enhanced and the second phase particles precipitation strengthening effects were improved, but also the growth of recrystallized grain was restrained during the Cu-Cr-Zr alloy continuous extrusion processing processes.

Key words： high speed railway overhead contact lines Cu-Cr-Zr alloy continuous extrusion numerical simulation

Published: 25 April 2020

CLC number:

TG146.1

Fund:This work was financially supported by the China Railway Corporation Science and Technology Research and Development Program (2016J006-B).

About author:: Yilun Liu received his B.E in June 1994 from Southeast University and received his EMBA in June 2014 from Nanjing University. From September 2018, he is studying for his PHD in engineering at the School of Civil Engineering, Southeast University, mainly engaged in the development and application research of engineering new materials.

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Cite this article:

LIU Yilun. Adaptability Research on Cu-Cr-Zr Alloy for High Speed Railway Overhead Contact Lines During Continuous Extrusion Process[J]. Materials Reports, 2020, 34(8): 8131-8135.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.19070081 OR http://www.mater-rep.com/EN/Y2020/V34/I8/8131

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