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A kind of preparation method of copper-based pantograph sliding plate

A pantograph sliding plate, copper-based technology, applied in the field of preparation of copper-based pantograph sliding plate, can solve the problems of complex powder metallurgy process, easy pollution of powder interface, poor interface bonding, etc., and achieve good electrical conductivity and wear resistance Good performance and high density

Active Publication Date: 2019-02-05
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the known preparation technology of second-phase particle-reinforced metal matrix composites, the powder metallurgy process is more complex, the powder interface is easily polluted, the interface is poorly bonded, the density is low, and the conductivity is poor; the composite casting method is easy to absorb gas during the stirring process , resulting in many pores in the product and performance degradation

Method used

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  • A kind of preparation method of copper-based pantograph sliding plate
  • A kind of preparation method of copper-based pantograph sliding plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 2 The process flow, the MoS with a particle size of 50nm 2 The powder is granulated into 1mm spherical particles, and the 1mm particles are bonded with epoxy resin as figure 1 In the hexagon (the area surrounded by the hexagonal particle group is 60 square millimeters), three hexagons are bonded into a hexagonal particle group with a thickness of 3mm; then multiple hexagonal MoS 2 The particle group is bonded to the inner wall of the casting mold of the carbon-sprayed pantograph slide material, and makes the MoS 2 The distance between the particle group and the particle group is kept 2mm; finally, the molten copper (surface layer covered with activated carbon) at 1100°C is poured into the casting mold at a pouring temperature of 1090°C to obtain MoS 2 Reinforced copper-based pantograph slide material.

Embodiment 2

[0026] Such as figure 2 The process flow, the MoSe with a particle size of 1000nm 2 The powder is granulated into 0.1mm spherical particles, and the 0.1mm particles are bonded with epoxy resin as figure 1 In the square (the area surrounded by the square particle group is about 9 square millimeters), 6 squares are bonded into a square particle group with a thickness of 0.6mm; then multiple square particle groups are bonded to the carbon-sprayed The pantograph slide material casts the inner wall of the mould, and makes the MoSe 2 The distance between the particle group and the particle group is kept 15mm; finally, the molten copper (surface layer covered with activated carbon) at 1150°C is poured into the casting mold at a pouring temperature of 1100°C to obtain MoSe 2 Reinforced copper-based pantograph slide material.

Embodiment 3

[0028] Such as figure 2 The process flow is to granulate graphite powder with a particle size of 50um into spherical particles of 0.5mm, and bond the 0.5mm particles with epoxy resin to form figure 1 The round rod shape in the middle, and make the diameter of the particle group of the round rod reach 2mm; Then a plurality of round rods with a diameter of 2mm are bonded to the inner wall of the casting mold of the pantograph slide plate material through carbon spraying, and the graphite Keep a distance of 10mm between the powder particle group and the particle group; finally pour the molten copper (covered with activated carbon) at 1200°C into the casting mold at a pouring temperature of 1180°C to obtain graphite-reinforced copper-based pantograph slide material .

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Abstract

The invention discloses a preparation method for a copper-based pantograph pan, and belongs to the technical field of electric sliding friction materials. According to the method, MoS2 or NbSe2 or a graphite powder material which is in the nanometer / micrometer grain size and has the self-lubricating characteristic is subjected to pelleting, spherical particles with the grain size being 0.1-1.5 mm are obtained and are bonded into particle swarms in different shapes through epoxy resin, and then the particle swarms in different shapes are bonded to the inner surface of a mold; and finally molten copper liquid is poured into the mold, and the copper-based pantograph pan with the MoS2 or NbSe2 or graphite particle swarms which are in different shapes and have the self-lubricating characteristic evenly distributed on the surface is prepared. The method has the advantages that the production period is short, the process is simple, raw material waste is avoided, and the processes of powder mixing, extruding, drawing and the like are not needed; and through the pouring process, the copper-based pantograph pan has the characteristics of good electric conductivity and electric wear resistance and the like compared with copper-based pantograph pans prepared through powder metallurgy technologies used at present.

Description

technical field [0001] The invention relates to a preparation method of a copper-based pantograph sliding plate, which adopts a melting and casting method to prepare a copper-based pantograph sliding plate material with self-lubricating particles distributed on the surface, and belongs to the technical field of electrified sliding friction materials. Background technique [0002] Metal-based solid self-lubricating materials are composite materials formed by adding solid lubricants into the metal matrix as components. In some cases, its wear resistance is much better than that of the substrate. Pantograph skateboard material is an important current-collecting component for electric locomotives to obtain power sources. At present, the metal-based materials used in skateboards are mainly copper-based and iron-based. The lubricating components are low-melting point metals Pb, Bi, Sb, non-metallic Solid lubricant MoS 2 、WS 2 , graphite, copper sulfide, metal phosphides (phosph...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D19/14
CPCB22D19/14
Inventor 周晓龙胡一迪曹建春
Owner KUNMING UNIV OF SCI & TECH