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Wear resistant copper-based gradient material for manufacturing pantograph slider and preparation thereof

A technology of gradient materials and pantograph slides, applied in chemical instruments and methods, current collectors, electric vehicles, etc., can solve the problems of low service life, short service life, easy local grooves, etc., and achieve excellent friction and wear performance, high Mechanical strength and electrical conductivity, the effect of simple preparation process

Inactive Publication Date: 2009-04-15
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the serious wear and tear on the wires, the service life is short, and because the carbon slide plate has low mechanical strength and poor impact toughness, it is easy to cause the slide plate to break and break when encountering hard points of the wire during operation, and the service life is low and it is easy to pull grooves locally, especially in In the rainy season and wet areas, pantograph-catenary failures often occur due to increased friction
Therefore, in the early 1980s, powder metallurgy skateboards became a stereotyped product in my country, but powder metallurgy skateboards also had some problems, mainly because the oil content of powder metallurgy skateboards was low. When the formed lubricating film was damaged or failed, it was difficult to form new ones. Lubricating film to maintain a good running-in state between the slide plate and the wire
In this way, the situation where the skateboard is severely worn to the catenary wire

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] a. Add 97 grams of copper and 3 grams of zirconia into the ball mill, put 400 grams of balls into it, mix at a speed of 400r / min for 3 hours, and mix well for later use; then add 85 grams of copper and 15 grams of graphite into the ball mill , put in 300 grams of grinding balls, mix at a speed of 400r / min for 3 hours, mix well and set aside.

[0012] b. Add the uniformly mixed copper-zirconia powder into the grinding tool, and vibrate evenly; add 20 grams of pure copper powder on the top of the copper-zirconia in the grinding tool, and vibrate evenly; then add uniformly mixed copper on the pure copper layer - Graphite powder 80 g. The mold is put into a cold isostatic press and pressed at 500MPa.

[0013] c. Take out the pressed and formed material from the mold, and put it in a vacuum of 10 -4 MPa, heated to a temperature of 860°C at a heating rate of 10°C / min, held for 5 hours for sintering, and then cooled to room temperature. A copper-based gradient wear-resistan...

Embodiment 2

[0015] a. Add 80 grams of copper and 20 grams of zirconia into the ball mill, put 400 grams of balls into it, mix at a speed of 250r / min for 4 hours, and mix well for later use; then add 90 grams of copper and 10 grams of graphite into the ball mill , put in 400 grams of grinding balls, mix at a speed of 250r / min for 4 hours, mix well and set aside.

[0016] b. Add the uniformly mixed copper-zirconia powder into the grinding tool and vibrate evenly; add 20 grams of pure copper powder on top of the copper-zirconia in the mold and vibrate evenly; then add uniformly mixed copper powder on the pure copper powder layer - Graphite powder 80 g. The mold is put into a cold isostatic press and pressed at 400MPa.

[0017] c. Take out the pressed and formed material from the mold, and put it in a vacuum of 10 -4 MPa, heated to a temperature of 450°C at a heating rate of 10° / min, and then to a temperature of 900°C at a heating rate of 15° / min, held for 4 hours for sintering, and then co...

Embodiment 3

[0019] a. Add 90 grams of copper and 10 grams of zirconia into the ball mill, put 400 grams of balls into it, mix at a speed of 350r / min for 4 hours, and mix well for later use; then add 95 grams of copper and 5 grams of graphite into the ball mill , put in 400 grams of grinding balls, mix at a speed of 350r / min for 5 hours, mix well and set aside.

[0020] b. Add uniformly mixed copper-zirconia powder into the mold and vibrate evenly; add 20 grams of pure copper powder above the copper-zirconia in the mold and vibrate evenly; then add uniformly mixed copper-graphite on the pure copper layer Powder 80 grams. The mold is put into a cold isostatic press and pressed at 600MPa.

[0021] c. Take out the press-molded material from the mould, and place it in a vacuum of 10 -4 MPa, heated to a temperature of 550°C at a heating rate of 10° / min, and then to a temperature of 960°C at a heating rate of 15° / min, held for 3 hours for sintering, and then cooled to room temperature. A copp...

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PUM

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Abstract

The invention discloses a wear-resistant copper-matrix gradient material for use in manufacture of pantograph slide plates and a preparation method thereof. The wear-resistant copper-matrix gradient material consists of a copper-zirconium oxide layer, a pure copper layer and a copper-graphite layer. The preparation method comprises the following steps: evenly mixing copper powder and zirconium oxide powder in a ball grinder according to a mass ratio; evenly mixing copper powder and graphite powder in the ball grinder according to a mass ratio; placing the copper-zirconium oxide layer, the pure copper layer and the copper-graphite layer in a mould according to a thickness ratio; placing the mould in a cold isostatic press for press forming; removing the molded material from the mould and sintering the molded mater in a vacuum environment to obtain the copper-matrix gradient wear-resistant material. The wear-resistant copper-matrix gradient material for use in manufacture of pantograph slide plates and the preparation method thereof have advantages of simple preparation process and suitability for industrial large-scale production. The obtained copper-matrix gradient wear-resistant material is used for manufacturing pantograph slide plates for electric locomotives.

Description

technical field [0001] The invention relates to a wear-resistant copper-based gradient material for manufacturing pantograph slides and a preparation method thereof, belonging to the technical field of electric power engineering materials. Background technique [0002] In the 1960s, my country’s electric locomotive pantograph slides used iron, steel, and carbon slides. Due to the serious wear and tear on the wires, the service life is short, and because the carbon slide plate has low mechanical strength and poor impact toughness, it is easy to cause the slide plate to break and break when encountering hard points of the wire during operation, and the service life is low and it is easy to pull grooves locally, especially in In the rainy season and humid areas, pantograph-catenary failures often occur due to increased friction. Therefore, in the early 1980s, powder metallurgy skateboards became a stereotyped product in my country, but powder metallurgy skateboards also had so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/01B32B15/20C22C1/05B22F3/16B60L5/20
Inventor 郑冀李松林窦富起李彤辉于瑶
Owner TIANJIN UNIV
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