Composite material for pantograph slide plate and preparing method thereof

A technology for pantograph slides and composite materials, applied to conductive materials dispersed in non-conductive inorganic materials, current collectors, electric vehicles, etc. Complicated preparation process and other issues

Active Publication Date: 2013-07-10
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a composite material for a pantograph slide plate and a preparation method thereof, aiming at solving the problems of complex preparation process, unstable comprehensive product performance, difficulty in manufacture, low reliability of use and application of the pantograph slide plate provided by the prior art. small problem

Method used

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  • Composite material for pantograph slide plate and preparing method thereof
  • Composite material for pantograph slide plate and preparing method thereof

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preparation example Construction

[0035] The preparation method comprises the following steps:

[0036] Step 1, performing ultrasonic degreasing and activation on the mixed braided body woven by carbon fiber 2 and copper wire 1;

[0037] Step 2, using propylene as the precursor for depositing pyrolytic carbon, with H 2 As dilution gas and furnace pressure regulating gas, the hybrid braid after ultrasonic degreasing and activation is placed in a chemical vapor deposition furnace for CVI deposition;

[0038] Step 3: Put the mixed braid deposited with pyrolytic carbon into a vacuum-pressure impregnation tank, use a thermosetting resin as an impregnating agent, and use a high-pressure impregnation process to obtain the composite material after being solidified and carbonized in sequence.

[0039] In the embodiment of the present invention, in step 1, the specific implementation method for ultrasonic degreasing and activation of the mixed braided body woven by carbon fiber 2 and copper wire 1 is as follows:

[00...

Embodiment 1

[0061] a C f / Cu-C composite material pantograph slide plate, which uses quasi-three-dimensional needle-punched carbon fiber 2 and copper wire 1 mixed braid as reinforcement, and the initial size of the braid is 100×30×25mm 3 , the initial density of the mixed braid is 1.0g / cm 3 , the mass percentage of copper contained is 25%, and the area percentage of Cu on the friction surface is 15%. The selected copper wire has a diameter of 0.1mm. Made C f / Cu-C composite material density is 1.84g / cm 3 , the resistivity is 8.12μΩ / m, the compressive strength is 168MPa, the bending strength is 121MPa, the Rockwell hardness is 53HRC, and the skateboard material is processed into a cross section of 1cm 3 , a cylindrical sample with a height of 20mm was subjected to a current-carrying friction and wear test on a self-made current-carrying friction and wear machine (ZL201220060420.5). The experimental parameters were current 200A, load 65N, and wear time 3min. It is measured that the hig...

Embodiment 2

[0067] The difference from Example 1 is that a two-step three-dimensional braided carbon fiber 2 and copper wire 1 mixed braid is used as a reinforcement, and the initial density of the mixed braid is 1.0 g / cm 3 . The single deposition time of CVI technology deposition pyrolytic carbon process is 30h. After each deposition is completed, the green body is decoked. After 3 consecutive depositions (total time is 90h), the density of the green body reaches 1.5g / cm 3 . Use furfurone as the impregnating agent, the impregnation pressure is 2MPa, and the pressure is maintained for 3h. It is then cured at 150°C, and then transferred to a carbonization furnace for carbonization treatment at a temperature of 750°C. Made C f / Cu-C composite material density is 1.96g / cm 3 , the resistivity is 5.67μΩ / m, the compressive strength is 183Mpa, the bending strength is 132Mpa, and the Rockwell hardness is 58HRC. The current-carrying friction and wear test is carried out on the self-made frict...

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Abstract

The invention discloses a composite material for a pantograph slide plate and a preparing method thereof. A reinforced body of the composite material is a three-dimensional mixed fabric body formed by carbon fibers and copper wires. The preparing method of the composite material includes that the mixed fabric body is subjected to ultrasonic deoiling activation; propylene is adopted to serve as a precursor for pyrolytic carbon depositing, H2 is adopted to serve as diluents and furnace pressure regulation gases, and the mixed fabric body is placed into a chemical vapor deposition furnace for Chemical Vapor Infiltration (CVI) depositing; and a green body deposited with pyrolytic carbon is placed into a vacuum-pressure dipping tank, thermosetting resin is adopted to serve as impregnants, the high-pressure dipping process is used for processing, and finally the composite material is obtained after curing and carbonizing in sequence. The reinforced body of the composite material is the three-dimensional mixed fabric body formed by carbon fibers and copper wires, metallic coppers form a mutually connected network structure in the composite material, a low-resistance channel is provided for electron movement in the current-carrying state, the composite material has good mechanical performance and electric conduction performance, and abrasion resistance and arc erosion resistance of the composite material are improved due to the pyrolytic carbon.

Description

technical field [0001] The invention belongs to the technical field of pantograph slide preparation, and in particular relates to a composite material for a pantograph slide and a preparation method thereof. Background technique [0002] The pantograph slide plate is the throat part of the power supply part of the electric locomotive. The limit of the speed increase of the electric locomotive mainly depends on the pantograph-catenary current receiving technology, vehicle technology and braking technology. The essential. With the development of high-speed and electrified railways, pantograph slide materials are also being improved and upgraded. The pantograph sliding plate is in frictional contact with the grid wires, and collects current from the catenary wires to continuously supply power to the locomotive. Due to its harsh working conditions, arcing and burning during operation can easily lead to abnormal wear of friction pairs, especially grid wires. The selection prin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L5/20H01B1/22D06M10/02D06M11/74D06M15/39D06M15/41D06M101/40
Inventor 涂川俊熊贤至邓联谱陈刚金曦伦
Owner HUNAN UNIV
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