High-strength wear-resistant carbon sliding plate for pantograph and preparation method thereof

Abstract

The invention discloses a high-strength wear-resistant carbon sliding plate for a pantograph, which is prepared by kneading, extruding and roasting a dry powder mixture and liquid asphalt which accounts for 27-35% of the mass of the dry powder mixture, wherein the dry powder mixture is prepared by fully mixing the following raw materials in percentage by mass: 10%-30% of pitch coke particles witha particle size of 0.5-0.2 mm, 15%-30% of pitch coke particles with the particle size of 0.2-0 mm, 30%-40% of pitch coke powder, 5%-20% of graphite powder and 5%-10% of carbon black. The invention also discloses a preparation method thereof. According to the invention, the product performance is comprehensively considered, the raw materials of various particle sizes are reasonably configured, andthe basic performance of the product is improved from the raw material ratio; the kneading speed per hour and the kneading temperature are strictly controlled, so that the internal structural state ofthe product is improved; the compactness of the product is uniformized through pre-pressing extrusion forming, and the problem of internal cracking and layering is reduced; and through the design ofa roasting temperature rise curve, roasting deformation cracks are reduced, the configuration of filler avoids sand burning of the product, and the yield is improved, so that the structural performance of the pantograph carbon contact strip is improved on the whole, and various physicochemical indexes of the pantograph carbon contact strip reach the advanced level in China.

Description

technical field

[0001] The invention relates to the technical field of pantograph carbon slide plates, in particular to a high-strength wear-resistant carbon slide plate for pantographs and a preparation method thereof. Background technique

[0002] At present, with the rapid development of the high-speed rail field, the carbon material of the pantograph carbon slide plate required for the power supply connection of the power source of the high-speed rail power group is indispensable. At present, the pure carbon slide plates used in China are all imported, and the pantograph carbon Due to the special application field of the skateboard, the requirements for the strength, hardness and resistance of the material are extremely strict. The high-strength, wear-resistant pantograph carbon skateboard has good strength, hardness, conductivity and shock resistance, and has the effect of corrosion resistance and high temperature resistance. .

[0003] The pantograph carbon skateboard...

Examples

Embodiment 1

[0027] The high-strength wear-resistant carbon slide plate used for pantographs uses 25% of pitch coke particles with a particle size of 0.5-0.2mm, 20% of pitch coke particles with a particle size of 0.2-0mm, 30% of pitch coke powder, 20% of graphite powder, carbon Black 5% is fully mixed to obtain a dry powder mixture, wherein the particle size of 0.5-0.2mm is the size of a 32-mesh sieve, the particle size of 0.2-0mm is the size of a 65-mesh sieve, and the powder material is a size of a 200-mesh sieve. The dry powder mixture passes through the mixing equipment Mix evenly, such as using a biaxial Z-type kneader for dry mixing, it can be mixed evenly in about 40 minutes. When using a biaxial Z-type kneader for dry mixing, the dry mixing temperature can be adjusted to 150°C. On the basis of ensuring uniform mixing, it can also ensure the internal temperature of the dry powder mixture for subsequent direct kneading. Then add softened liquid asphalt into the kneader according to (...

Embodiment 2

[0032] The high-strength wear-resistant carbon skateboard is formed by fully mixing the following dry powder mixtures with the following mass percentages of raw materials: 25% of asphalt coke particles with a particle size of 0.5-0.2mm, 25% of asphalt coke particles with a particle size of 0.2-0mm, and asphalt Coke powder 33%, graphite powder 10%, carbon black 7%. The liquid pitch used accounts for (29±2)% of the mass of the dry powder mixture.

[0033] Other preparation process is identical with embodiment 1.

Embodiment 3

[0035] The high-strength wear-resistant carbon skateboard is formed by fully mixing the following dry powder mixtures with the following mass percentages of raw materials: 20% of asphalt coke particles with a particle size of 0.5-0.2mm, 30% of asphalt coke particles with a particle size of 0.2-0mm, and asphalt Coke powder 30%, graphite powder 10%, carbon black 10%. The liquid asphalt used accounts for (28±2)% of the mass of the dry powder mixture.

[0036] Other preparation process is identical with embodiment 1.

technical field

[0001] The invention relates to the technical field of pantograph carbon slide plates, in particular to a high-strength wear-resistant carbon slide plate for pantographs and a preparation method thereof. Background technique

[0002] At present, with the rapid development of the high-speed rail field, the carbon material of the pantograph carbon slide plate required for the power supply connection of the power source of the high-speed rail power group is indispensable. At present, the pure carbon slide plates used in China are all imported, and the pantograph carbon Due to the special application field of the skateboard, the requirements for the strength, hardness and resistance of the material are extremely strict. The high-strength, wear-resistant pantograph carbon skateboard has good strength, hardness, conductivity and shock resistance, and has the effect of corrosion resistance and high temperature resistance. .

[0003] The pantograph carbon skateboard...

Examples

Embodiment 1

[0027] The high-strength wear-resistant carbon slide plate used for pantographs uses 25% of pitch coke particles with a particle size of 0.5-0.2mm, 20% of pitch coke particles with a particle size of 0.2-0mm, 30% of pitch coke powder, 20% of graphite powder, carbon Black 5% is fully mixed to obtain a dry powder mixture, wherein the particle size of 0.5-0.2mm is the size of a 32-mesh sieve, the particle size of 0.2-0mm is the size of a 65-mesh sieve, and the powder material is a size of a 200-mesh sieve. The dry powder mixture passes through the mixing equipment Mix evenly, such as using a biaxial Z-type kneader for dry mixing, it can be mixed evenly in about 40 minutes. When using a biaxial Z-type kneader for dry mixing, the dry mixing temperature can be adjusted to 150°C. On the basis of ensuring uniform mixing, it can also ensure the internal temperature of the dry powder mixture for subsequent direct kneading. Then add softened liquid asphalt into the kneader according to (...

Embodiment 2

[0032] The high-strength wear-resistant carbon skateboard is formed by fully mixing the following dry powder mixtures with the following mass percentages of raw materials: 25% of asphalt coke particles with a particle size of 0.5-0.2mm, 25% of asphalt coke particles with a particle size of 0.2-0mm, and asphalt Coke powder 33%, graphite powder 10%, carbon black 7%. The liquid pitch used accounts for (29±2)% of the mass of the dry powder mixture.

[0033] Other preparation process is identical with embodiment 1.

Embodiment 3

[0035] The high-strength wear-resistant carbon skateboard is formed by fully mixing the following dry powder mixtures with the following mass percentages of raw materials: 20% of asphalt coke particles with a particle size of 0.5-0.2mm, 30% of asphalt coke particles with a particle size of 0.2-0mm, and asphalt Coke powder 30%, graphite powder 10%, carbon black 10%. The liquid asphalt used accounts for (28±2)% of the mass of the dry powder mixture.

[0036] Other preparation process is identical with embodiment 1.

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