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Copper-impregnated carbon slider and preparation method thereof

A carbon sliding plate and copper immersion technology, applied in the field of material processing, can solve the problems of increasing resistivity, increased surface friction, poor wettability, etc., and achieve the effect of improving wettability, good mechanical properties and electrical properties

Active Publication Date: 2019-11-22
四川广通碳复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] A. The wettability between the copper liquid and the carbon sliding plate material is poor. If no measures are taken, the copper liquid is not easy to completely infiltrate into the pores, and the adhesion between the copper liquid and the pores becomes poor after cooling and shrinkage;
[0023] B. Boiling in the boiling metal salt melt can improve the wettability of the carbon slide, but also reduce the lubricity of the surface of the carbon slide, which increases the surface friction;
[0024] C. Adding other alloy materials into the copper liquid can improve the wettability of the alloy copper liquid and the carbon slide, but it will also increase the resistivity

Method used

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  • Copper-impregnated carbon slider and preparation method thereof
  • Copper-impregnated carbon slider and preparation method thereof

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preparation example Construction

[0069] The invention discloses a method for preparing a copper-impregnated carbon sliding plate, which comprises the following steps:

[0070] (1) Take the basic raw materials for preparing copper-impregnated carbon slides, add them to the kneading equipment according to the weight ratio, and mix them evenly in the kneading equipment to obtain a mixture; the basic raw materials include pitch coke, petroleum coke, flake graphite, carbon fiber, binder and Porogen;

[0071] (2) Compress the mixture into a shape, heat-preserve and dry it after setting; obtain a dry billet; then perform high-pressure molding on the dry billet in a mold to obtain a molded billet;

[0072] (3) Carry out high-temperature sintering treatment on the forming blank, gasify the pore-forming agent in the forming blank to form pores in the forming blank, and obtain the basic carbon sliding plate;

[0073] (4) Preparation of wetting aid: Disperse magnesium aluminum silicate powder and iron boride powder in w...

Embodiment 1

[0083] Example 1: Preparation of Basic Carbon Sliding Plate

[0084] The basic raw material composition of the basic carbon skateboard:

[0085] 25 parts of pitch coke; 10 parts of petroleum coke; 18 parts of flake graphite;

[0086] 2 parts of carbon fiber; 13 parts of phenolic resin; 6 parts of 250 mesh bamboo charcoal powder.

[0087] (1) Take the basic raw materials and add them to the kneading equipment, and mix them evenly in the kneading equipment to obtain the mixture;

[0088] (2) Press and shape the mixture. Roller extruder can be used for compacting. After being extruded into sheets, put it into a cylinder or square cylinder and use a press for compaction. The compaction operating pressure is 1atm, that is, 1 piece atmospheric pressure. After setting the shape, heat-preserve and dry at 80°C; obtain a dry blank;

[0089] Apply external release agent polyvinyl alcohol in the mould, then put the dry blank into the mold and carry out high-pressure molding under a pr...

Embodiment 2

[0091] Embodiment 2: Preparation of copper-impregnated carbon slide plate

[0092] (1) Preparation of wetting aid: disperse 90g of iron boride powder and 10g of magnesium aluminum silicate powder into 1000g of water to form a mixed solution with good fluidity, which is the wetting aid dispersion;

[0093] (2) Put the basic carbon slide into the wetting aid dispersion, let the wetting aid dispersion enter the pores of the base carbon slide under high pressure conditions of 2 atm, take out the base carbon slide after immersion for 3 minutes and clean the surface of the base carbon slide, Clean the wetting aid dispersion on the surface, and then vacuum sinter at 2000°C to remove the moisture in the pores, and let the wetting aid melt and disperse to the surface of the pores;

[0094] (3) Repeat step (2) 3 times; get a carbon skateboard;

[0095] (4) Put the carbon slide plate into the copper immersion equipment, first vacuum the gas in the pores of the carbon slide plate, submer...

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Abstract

The invention discloses a copper-impregnated carbon slider which is prepared from a basic raw material and an infiltration aid, wherein the basic raw material comprises 20-30 parts of pitch coke; 10 to 15 parts of petroleum coke; 15 to 20 parts of crystalline flake graphite; 2-5 parts of carbon fibers; 10 to 20 parts of a binder; and 5-10 parts of a pore-forming agent. The components of the carbonslider composite material are optimized, bamboo charcoal powder is used as a pore-forming agent to reduce impurity retention in pores, copper liquid can be infiltrated into the pores through a high-pressure copper leaching process to form a copper-containing carbon slider, and the carbon slider has good mechanical properties and electrical properties.

Description

technical field [0001] The invention relates to the technical field of material processing, in particular to a copper-impregnated carbon slide plate and a preparation method thereof. Background technique [0002] The pantograph is the electrical equipment used by the electric traction locomotive to obtain electric energy from the catenary, and is installed on the roof of the locomotive or motor car. Pantographs can be divided into single-arm bows and double-arm bows, both of which are composed of slide plates, upper frames, lower arm rods (lower frames for double-arm bows), underframes, bow springs, transmission cylinders, supporting insulators and other components. The pantograph slide is an important current-collecting component of the electric locomotive. It is installed on the uppermost part of the pantograph and directly contacts the contact wire. In the sliding state, it obtains 100-1000A current from the contact wire to supply power to the locomotive. [0003] The el...

Claims

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Application Information

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IPC IPC(8): C04B35/83C04B35/532C04B35/622C04B38/06C04B41/90
CPCC04B35/532C04B35/622C04B35/83C04B38/068C04B41/009C04B41/52C04B41/90C04B2235/425C04B2235/48C04B2235/5248C04B2235/602C04B2235/656C04B35/52C04B41/5062C04B41/4535C04B41/5024C04B41/0072C04B41/5127C04B41/4523
Inventor 刘凌江
Owner 四川广通碳复合材料有限公司
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