Microstructure Evolution in Preparation of Cu-Sn Contact Wire for High-speed Railway

2011 ◽  
Vol 415-417 ◽  
pp. 446-451 ◽  
Author(s):  
Ming Yan ◽  
Yu Cai Wu ◽  
Jing Chao Chen ◽  
Xiao Long Zhou
Keyword(s):  
Microstructure Evolution ◽  
High Speed ◽  
High Speed Railway ◽  
Contact Wire ◽  
Evolution Rule ◽  
Theoretical Support

The thesis studies the microstructure evolution rule during Cu-Sn alloy preparation and processing process and its influence on material performance, provides necessary theoretical support for industrialization development of Cu-Sn contact wire for high-speed railway.

UAV-LiDAR-Based Measuring Framework for Height and Stagger of High-Speed Railway Contact Wire

2021 ◽  
pp. 1-14
Author(s):  
Yixuan Geng ◽  
Fengjun Pan ◽  
Limin Jia ◽  
Zhipeng Wang ◽  
Yong Qin ◽  
...  
Keyword(s):  
High Speed ◽  
High Speed Railway ◽  
Contact Wire

scholarly journals Study of the Combined Severe Plastic Deformation Techniques Applied to Produce Contact Wire for High-Speed Railway Lines

Metals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1476
Author(s):  
Rashid N. Asfandiyarov ◽  
Georgy I. Raab ◽  
Denis A. Aksenov
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
High Speed ◽  
Tensile Elongation ◽  
Secondary Phase ◽  
Forming Process ◽  
High Speed Railway ◽  
Contact Wire ◽  
Service Properties ◽  
Mechanical And Service Properties

This work considers the development and the application of combined severe plastic deformation (SPD) techniques to produce contact wire with an enhanced complex of physical, mechanical, and service properties used for high-speed railway lines. This type of processing can be used as an alternative to most conventional production methods, including rolling and drawing. The proposed technique is based on the combination of radial swaging and equal-channel angular pressing, bundled with the wire-forming process. Laboratory contact wire samples with an enhanced complex of physical, mechanical, and service properties were produced during physical experiments. The composition of processed alloy samples meets modern requirements for contact wires for high-speed railways. Ultimate tensile strength of 560 ± 20 MPa, electrical conductivity of 76 ± 2% IACS, and relative tensile elongation of 20 ± 2% are achieved through the formation of a band structure. Fragments of 300 ± 20 nm were formed inside strips with the precipitation of secondary phase particles of 20–100 nm along the fragment boundaries, mainly during the aging process.

Study on Microstructure Evolution during the Cold Roll-Beating of 40Cr

2014 ◽  
Vol 490-491 ◽  
pp. 256-261 ◽  
Author(s):  
F.K. Cui ◽  
G.P. Yan ◽  
H. Liu ◽  
X.Q. Wang ◽  
Y.X. Li
Keyword(s):  
Microstructure Evolution ◽  
High Speed ◽  
Forming Process ◽  
Forming Mechanism ◽  
Theoretical Support ◽  
Cold Roll ◽  
Macroscopic Deformation ◽  
Micro Level ◽  
Microscopic Change ◽  
The Relationship

For revealing the forming mechanism in micro level and for establishing the relationship between macroscopic deformation and microscopic changes, impact experiment of material property is conducted under the high speed cold roll-beating condition based on the plastic deformation mechanism of metal material, Based on the Zener-Hollomon constitutive relation, the macro change model is established, and the parameters of the 40 Cr are obtained according to the experimental data. Based on the model of microstructure evolution of dislocation density, the relation between macroscopic change and microscopic change is established, which provides the theoretical support for the forming process in micro level and revels the relationship between macro deformation and micro changes in the forming process of high speed cold roll-beating.

Simulation Study of Dynamic Response on Box Girder Steel Side Formwork Used in the High Speed Railway

2014 ◽  
Vol 540 ◽  
pp. 189-192
Author(s):  
Jian Ping Li ◽  
Jin Huang ◽  
Jie Ruan ◽  
Xiang Jun Wang
Keyword(s):  
Simulation Study ◽  
High Speed ◽  
Construction Site ◽  
Actual Situation ◽  
Box Girder ◽  
High Speed Railway ◽  
Theoretical Support ◽  
Plate Type ◽  
The Web

In the high speed railway box girder construction,for the web is narrow and with a lot of rebar,and furnished with prestressed channels,insert-type Vibrators alone can not fully guarantee compacting concrete. It is easy to cause the phenomenon such as honeycomb, pitting ,surface hole,seriously affect the quality of construction,The plate type vibrator is commonly used for auxiliary vibration at the construction site. This paper combined the construction project of Hebang single linear 32 meter side formwork ,according to the actual situation of the construction, the use of the plate type vibrator are analyzed in the simulation.Using the solidwork2010 established a high speed railway box girder side formwork model,then import the model into workbench 14.5 to do the analysis.Simulation values comply with the relevant standards,provides theoretical support for the plate type vibrator system for use in high speed box girder beams construction.

A Museum Filled with Past, Present and Future in High Speed Railway^|^mdash;SCMAGLEV and Railway Park^|^mdash;

2012 ◽  
Vol 132 (10) ◽  
pp. 673-676
Author(s):  
Takaharu TAKESHITA ◽  
Wataru KITAGAWA ◽  
Inami ASAI ◽  
Hidehiko NAKAZAWA ◽  
Yusuke FURUHASHI
Keyword(s):  
High Speed ◽  
High Speed Railway
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