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Method for preparing copper / graphite conductive slide plate material

A technology of graphite and sliding plate, which is applied in the field of preparation of copper/graphite conductive sliding plate materials, can solve the problems of reduced self-lubricating effect, poor electrical conductivity, powder interface pollution, etc., achieve good interface wettability, improve interface wettability, and conduct electricity The effect of excellent performance

Active Publication Date: 2018-01-23
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This preparation method is likely to cause powder interface pollution, poor interface bonding, low density, and poor electrical conductivity; especially for copper-graphite slide materials, due to the poor wettability of the interface between graphite and copper, graphite particles are easily separated from the copper substrate during use. If it falls off, the self-lubricating effect will decrease sharply, causing serious damage to the wire

Method used

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  • Method for preparing copper / graphite conductive slide plate material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: a kind of preparation method of copper / graphite conductive sliding plate material, concrete steps are:

[0021] (1) Mix copper powder and asphalt evenly and perform ball milling for 3 hours to obtain mixture A, in which the mass ratio of copper powder and asphalt is 100:1, the mass ratio of grinding balls to materials is 3:1, and the ball milling speed is 100r / min ;

[0022] (2) Mix graphite and tin powder evenly and perform ball milling for 3 hours to obtain mixture B, wherein the mass ratio of graphite to copper powder is 1:50, the mass ratio of balls to materials is 3:1, and the ball milling speed is 100r / min ;

[0023] (3) Mix the mixture A obtained in step (1) with the mixture B obtained in step (2) and perform ball milling for 3 hours to obtain mixture C, wherein the content of tin powder in mixture C is 2% in mass percentage, and the ball and The mass ratio of materials is 3:1, and the ball milling speed is 100r / min;

[0024] (4) Under the condit...

Embodiment 2

[0028] Embodiment 2: a kind of preparation method of copper / graphite conductive sliding plate material, concrete steps are:

[0029] (1) Mix copper powder and asphalt evenly and perform ball milling for 15 hours to obtain mixture A, in which the mass ratio of copper powder and asphalt is 80:1, the mass ratio of grinding balls to materials is 4:1, and the ball milling speed is 300r / min ;

[0030] (2) Mix graphite and tin powder evenly and perform ball milling for 15 hours to obtain mixture B, in which the mass ratio of graphite to copper powder is 1:30, the mass ratio of balls to materials is 4:1, and the ball milling speed is 300r / min ;

[0031] (3) Mix mixture A obtained in step (1) with mixture B obtained in step (2) and perform ball milling for 20 hours to obtain mixture C, wherein the content of tin powder in mixture C is 4% in mass percentage, and the ball and The mass ratio of materials is 4:1, and the ball milling speed is 300r / min;

[0032] (4) Under the condition o...

Embodiment 3

[0035] Embodiment 3: a kind of preparation method of copper / graphite conductive sliding plate material, concrete steps are:

[0036] (1) Mix copper powder and asphalt evenly and perform ball milling treatment for 36 hours to obtain mixture A, in which the mass ratio of copper powder and asphalt is 50:1, the mass ratio of grinding balls to materials is 5:1, and the ball milling speed is 600r / min ;

[0037] (2) Mix graphite and tin powder evenly and perform ball milling for 36 hours to obtain mixture B, in which the mass ratio of graphite to copper powder is 1:5, the mass ratio of balls to materials is 5:1, and the ball milling speed is 600r / min ;

[0038] (3) Mix the mixture A obtained in step (1) with the mixture B obtained in step (2) and perform ball milling for 36 hours to obtain mixture C, wherein the content of tin powder in mixture C is 6% in mass percentage, and the ball and The mass ratio of materials is 5:1, and the ball milling speed is 600r / min;

[0039] (4) Unde...

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Abstract

The invention relates to a method for preparing a copper / graphite conductive slide plate material, and belongs to the technical field of electric locomotive contact slide materials. The method adopts a technology combining ball-milling of mixed powder, powder forming and sintering, molding machining and reshaping to prepare the copper / graphite conductive slide plate material. The method can utilize existing production equipment, is less in investment, low in production cost, can sufficiently improve the interface wetting property of graphite and a copper substrate, and thus the copper-based slide plate material which is excellent in self lubricity and electric conductivity is obtained.

Description

technical field [0001] The invention relates to a preparation method of a copper / graphite conductive sliding plate material, which belongs to the technical field of electric locomotive contact sliding materials. Background technique [0002] With the development of high-speed railways, the speed of high-speed railways has reached 300-350 kilometers per hour. Such a high operating speed requires very high performance of locomotive components, and the skateboard is an important current-collecting device connecting locomotives and wires. When the electric locomotive is running at high speed, high-speed relative charged friction occurs between the slide plate and the contact wire, which inevitably requires the conductive slider material not only to have good electrical conductivity and friction and wear resistance, but also to ensure that it will not cause serious damage to the wire. , does not reduce the life of the wire. [0003] Copper-based powder metallurgy slides are impo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/04B22F3/10B22F3/20C22C9/00C22C1/05
Inventor 周晓龙姚碧霞曹建春黎敬涛
Owner KUNMING UNIV OF SCI & TECH
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