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Metal-impregnated carbon skateboard and preparation method thereof

A carbon sliding plate and metal immersion technology, applied in vehicle parts, electric vehicles, transportation and packaging, etc., can solve the problems of high temperature failure of adhesive glue, easy arc generation, metal mesh oxidation, etc., to achieve strong bonding ability and reduce assembly steps. Effect

Active Publication Date: 2019-06-04
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned adhesives in the prior art are selected from epoxy resin adhesives, and generally have a maximum temperature resistance of 300°C. When the current passes through the adhesive layer, the temperature rises, which will easily cause the adhesive to fail at high temperature, and degumming will occur during use; on the other hand It is difficult to place the metal mesh on the bracket evenly, and it is easy to generate arcs when the rail vehicle receives current, which will oxidize the metal mesh, and the contact resistance between the carbon slider and the bracket will increase sharply, affecting the normal use of the product

Method used

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Examples

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Effect test

preparation example Construction

[0023] The present invention also provides a method for preparing the metal-impregnated carbon slide, including:

[0024] S1: Preparation of carbon skateboard skeleton;

[0025] S2: prepare the bracket;

[0026] S3: Assemble the carbon skateboard frame and bracket;

[0027] S4: Carbon skateboard frame and bracket assembled by impregnation with copper solution.

[0028] In the present invention, before step S3, sandblasting or copper plating is performed on the surface of the carbon skateboard skeleton, and the sandblasting treatment can increase the specific surface area of ​​the carbon skateboard skeleton, thereby increasing the wetting between the carbon skateboard skeleton and the copper layer The copper plating treatment is to add electroplated copper on the surface of the carbon skateboard skeleton first, so as to increase the wettability between the carbon skateboard skeleton and the copper layer, and enhance the bonding force between the two.

[0029] In the present ...

Embodiment 1

[0036] Preparation of the carbon slide skeleton: by weight, 60 parts of petroleum coke carbon powder, 7 parts of artificial graphite powder, 3 parts of carbon black, and 30 parts of pitch were kneaded in a double-roller kneader for 3 h, and the kneading temperature was 120 ° C. The kneaded carbon skateboard skeleton raw material was pressed and formed under the conditions of 40°C and 80MPa with a flat vulcanizer, then sintered in a vacuum furnace, and the temperature was raised from room temperature to 1300°C at a rate of 0.2°C / min. Insulate at 1300°C for 2 h, and after cooling, the carbon skateboard skeleton is obtained. The carbon skateboard skeleton is a dovetail structure with a density of 1.57 g / cm 3, the opening rate is 20%, and the pore diameter is 90-180 microns.

[0037] Preparation of the bracket: by weight, 75 parts of electrolytic Fe powder, 25 parts of gas-atomized Al powder and 5 parts of crushed Cr powder were mixed, pressed with a steel mold under a pressure of...

Embodiment 2

[0041] Preparation of the carbon slide skeleton: by weight, 60 parts of petroleum coke carbon powder, 7 parts of artificial graphite powder, 3 parts of carbon black, and 30 parts of pitch were kneaded in a double-roller kneader for 3 h, and the kneading temperature was 120 ° C. The kneaded carbon skateboard skeleton raw material was pressed and formed under the conditions of 40°C and 80MPa with a flat vulcanizer, then sintered in a vacuum furnace, and the temperature was raised from room temperature to 1300°C at a rate of 0.2°C / min. Insulate at 1300°C for 2 h, and after cooling, the carbon skateboard skeleton is obtained. The carbon skateboard skeleton is a dovetail structure with a density of 1.57 g / cm 3 , the opening rate is 20%, and the pore diameter is 90-180 microns.

[0042] Preparation of the bracket: by weight, 75 parts of electrolytic Fe powder, 25 parts of gas-atomized Al powder and 15 parts of crushed Cr powder were mixed, pressed with a steel mold under a pressure ...

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PUM

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Abstract

The invention discloses a metal-impregnated carbon skateboard, which comprises a carbon skateboard skeleton, a support frame and a copper layer, wherein the copper layer is formed on the combined interface of the carbon skateboard skeleton and the support frame, and is partially embedded into the carbon skateboard skeleton and the support frame. bracket. The invention further discloses a preparation method of the metal-impregnated carbon skateboard, wherein a carbon skateboard skeleton with a porous structure and a support frame with a porous structure are respectively used, and the carbon skateboard skeleton and the support frame are subjected to adhesion molding by impregnating with a copper liquid to obtain the metal-impregnated carbon skateboard. According to the present invention, thecopper layer partially embedded into the carbon skateboard skeleton and the support frame is arranged between the carbon skateboard skeleton and the support frame by using the shrinkage and flowing characteristics, such that the method does not require the adhesive and the metal net, the assembly step is eliminated, the prepared metal-impregnated carbon skateboard can resist high temperature, andthe bonding force between the carbon skateboard skeleton and the support frame is strong.

Description

technical field [0001] The invention relates to the technical field of carbon skateboards for electric locomotives, in particular to a metal-impregnated carbon skateboard and a preparation method thereof. Background technique [0002] As an important current-collecting and current-receiving component for the electric locomotive to obtain power from the catenary, the carbon skateboard directly contacts the catenary, and obtains current from the catenary wire in a static or sliding state to supply power for the electric locomotive. [0003] Carbon skateboards are generally composed of two parts: a carbon skateboard frame and a bracket. The commonly used assembly method for carbon skateboards in the prior art is to use conductive glue to bond and fix the carbon skateboard frame and bracket. The disadvantage of this method is that the current passes through the bonding. The high temperature of the layer will cause the adhesive to fail; on the other hand, the conductive adhesive ...

Claims

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Application Information

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IPC IPC(8): C04B41/88B60L5/08
Inventor 陈沛杭徐述荣郭少聪林信平
Owner BYD CO LTD
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