A metal impregnated carbon slide plate and its preparation method

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

Active Publication Date: 2021-09-21
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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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 slide skeleton raw material is pressed and formed with a flat vulcanizer under the conditions of 40°C and 80 MPa, and then sintered in a vacuum furnace, and the temperature rises from room temperature to 1300°C at a rate of 0.2°C / min. Insulated at 1300°C for 2 h, and after cooling, the carbon skateboard skeleton was obtained. The carbon skateboard skeleton was 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 20...

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 slide skeleton raw material is pressed and formed with a flat vulcanizer under the conditions of 40°C and 80 MPa, and then sintered in a vacuum furnace, and the temperature rises from room temperature to 1300°C at a rate of 0.2°C / min. Insulated at 1300°C for 2 h, and after cooling, the carbon skateboard skeleton was obtained. The carbon skateboard skeleton was 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 of ...

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Abstract

The invention discloses a metal-impregnated carbon slide, which comprises a carbon slide frame, a bracket and a copper layer, the copper layer is formed between the interface where the carbon slide frame and the bracket are combined, and is partially embedded in the Carbon skateboard skeleton and the brackets. The invention also discloses a method for preparing the metal-impregnated carbon slide. The porous structure of the carbon slide frame and the bracket are respectively used, and the carbon slide frame and the bracket are bonded and formed by impregnating copper liquid to obtain the metal-impregnated carbon slide. The present invention uses the shrinkage and flow characteristics of the copper liquid to set a copper layer partially embedded in the pores of the carbon skateboard skeleton and the bracket between the carbon skateboard skeleton and the bracket. This method does not require adhesive glue and metal mesh, and reduces the steps of assembly. Moreover, the prepared metal-impregnated carbon slide plate can withstand high temperature, and the carbon slide plate skeleton and the bracket have strong bonding ability.

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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Patent Type & Authority Patents(China)
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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