Novel high-speed train pantograph sliding block material

A technology for high-speed trains and pantographs, applied in circuits, electrical switches, collectors, etc., can solve problems such as the influence of wear performance, traditional composition and technology, and difficult performance breakthroughs, and achieve high weather resistance and processing technology Simple, good machinability effect

Inactive Publication Date: 2012-08-01
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at high speed and high temperature, Ti 3 SiC 2 Easily decomposed into hard impurities TiC and Ti 3 SiC 2 High temperature aggregates will have a great impact on wear performance
Although the other slider materials disclosed in the prior art are copper-based powder metallurgy materials with certain wear resistance and electrical conductivity, the composition process is relatively traditional, and it is difficult to make a major breakthrough in performance.

Method used

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  • Novel high-speed train pantograph sliding block material
  • Novel high-speed train pantograph sliding block material
  • Novel high-speed train pantograph sliding block material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1 (preferred embodiment)

[0033] (1) Mixing: Use a metal powder mixer (maximum capacity: 100kg) with a rotation speed of 34r / min. Change the rotation direction of the mixer every 15 minutes to allow the materials to be fully mixed.

[0034] (2) Experimental material: copper powder (Cu), 400 mesh, 87%;

[0035] Titanium silicon carbide (Ti 3 SiC 2 ), 200 mesh, 10%;

[0036] Graphite (C), 200 mesh, 3%;

[0037] (3) Initial pressure: 240 tons of pressure is used for initial pressure.

[0038] (4) Sintering: using a stepwise heating method, such as Figure 9 The temperature curve shown.

[0039] (5) Cooling: During the cooling process, hydrogen protection is used until the temperature drops to 200 o Below C.

[0040] (6) Subsequent processing: Necessary turning, cutting, drilling and other finishing and surface treatment of the formed test block.

[0041] Compared with the existing similar materials, the material obtained in this embodiment has ex...

Embodiment 2

[0049] The preparation method of this embodiment is the same as that of Example 1.

[0050] Experimental material: copper powder (Cu), 400 mesh, 90%;

[0051] Titanium silicon carbide (Ti 3 SiC 2 ), 200 mesh, 7%;

[0052] Ink (C), 200 mesh, 3%.

[0053] Compared with the existing similar materials, the material obtained in this embodiment has excellent comprehensive physical properties, and can realize the control of material properties by the process. It also has a certain protective effect.

[0054] The performance characteristics of the material are as follows:

[0055] Impact toughness tensile strength density Rockwell hardness coefficient of friction Conductivity 2.4J / cm 2 102MPa 6.5g / cm 3 72HB 0.38 74%IACS

[0056] see figure 2 Be the metallographic structure photograph of present embodiment material, from figure 2 It can be seen that the copper matrix (bright area) is distributed in a network, ...

Embodiment 3

[0060] The preparation method of this embodiment is the same as that of Example 1.

[0061] Experimental material: copper powder (Cu), 400 mesh, 84%;

[0062] Titanium silicon carbide (Ti 3 SiC 2 ), 200 mesh, 13%;

[0063] Ink (C), 200 mesh, 3%.

[0064] Compared with the existing similar materials, the material obtained in this embodiment has excellent comprehensive physical properties, and can realize the control of material properties by the process. It also has a certain protective effect.

[0065] The performance characteristics of the material are as follows:

[0066] Impact toughness tensile strength density Rockwell hardness coefficient of friction Conductivity 1.8J / cm 2 89MPa 5.5g / cm 3 70HB 0.38 74%IACS

[0067] see image 3 Be the metallographic structure photograph of present embodiment material, from image 3 It can be seen that in some areas, the copper matrix (bright area) is covered by Ti...

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Abstract

The invention relates to a novel high-speed train pantograph sliding block material, belonging to the technical field of metallic functional materials. The novel high-speed train pantograph sliding block material is characterized in that the alloy material comprises the following compositions in mass percent: 7-13 percent of Ti3SiC2, 0.9-3.1 percent of C and the balance of Cu. A pantograph sliding block which is made of the material provided by the invention has the advantages of excellent friction antifriction performance, good self-lubricating performance, good conductive performance, good arc burning loss resistance, good weather resistance, higher strength and rigidity, simple manufacturing process, good machining performance and low cost. When the material is used for a conductive system of a high-speed train, the conductive system can adapt to severe environments such as high temperature, high speed, heavy load, large impact and poor lubrication, the performance indexes of the high-speed train sliding block are realized, and the material is of a great practical significance to guaranteeing the safety and the normal work of the train and reducing the operating cost of a high-speed railway system.

Description

technical field [0001] The invention relates to the development and application of new materials and belongs to the technical field of metal functional materials. Background technique [0002] High-speed railway is a new type of rail transit system focused on the development of our country. The system is an electric drive system with a maximum speed of more than 350km / h. It has large transportation capacity, fast speed, good safety performance, low energy consumption, and light pollution. Advantages, irreplaceable superiority. The development of high-speed trains has put forward higher performance requirements for its key components—pantograph sliders, such as high electrical conductivity, high wear resistance, and impact resistance. At present, there is still a lack of systematic and in-depth research on the preparation, structure and performance of this component. There are many problems in the actual use of the existing slider materials. At present, most of the slider ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C32/00C22C9/00C22C1/03H01H1/025H01R41/00B60L5/00
Inventor 何国求刘晓山赵小根刘斌张玉刚袁永立
Owner TONGJI UNIV
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