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Copper-based pantograph slide plate material obtained through powder hot forging and preparation method thereof

A pantograph sliding plate and hot forging technology, which is applied in the field of powder metallurgy, can solve the problem of not obtaining high-density copper-based composite materials, limiting the development of copper-based pantograph sliding plate materials, and the solid solution ratio of metal components and copper matrix Low-level problems, to achieve the effect of inhibiting material transfer, reducing mechanical abrasion and wear, and no pollution in the process

Active Publication Date: 2021-06-18
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, due to the large difference in density between the added components and the matrix, component segregation is prone to occur during the mixing process. At the same time, some metal components have a low solid solution ratio with the copper matrix, which makes it difficult to achieve alloying, and the sintering process is difficult to fully carry out. It affects the performance of the skateboard and limits the development of copper-based pantograph skateboard materials
In addition, in the powder forming process, the mixed powder with high additive components has poor compressibility, it is difficult to achieve high density, and expansion occurs during sintering, and high-density copper-based composite materials cannot be obtained

Method used

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  • Copper-based pantograph slide plate material obtained through powder hot forging and preparation method thereof
  • Copper-based pantograph slide plate material obtained through powder hot forging and preparation method thereof
  • Copper-based pantograph slide plate material obtained through powder hot forging and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Take the iron-phosphorus preload powder (17 wt%), iron-nickel pre-gold powder (including 16T%), chromium powder, tin powder, lead powder, and scaly graphic powder are 5% by weight, 6% by weight, 9% by weight, respectively. 1 wt%, 1 wt%, 3 wt%, less than 1 wt% inevitable impurities and the balance of electrolytic copper powder, the particle size is 100 mesh, loaded into the V-type mixer mixed uniform; the resulting mixed powder (granules) The diameter 15 μm) is loaded into the steel mold, and the powder block is obtained by pressing the powder, and then the resulting powder biller is warmed in the sintering furnace of the sintered atmosphere of hydrogen with argon, and the temperature is 870 ° C. 2H. A sintered body; in addition, the forging mold is heated to 300 ° C, the burning blank is heated to 800 ° C, and the sintered body is moved into the forging mold in 5 seconds, at 1.8x10 3 KJ / M 2 Heat forging mining under the energy density, wherein the initial forging temperat...

Embodiment 2

[0046] Take the iron-phosphorus compound (containing phosphorus 18 wt%), iron-nickel predecessor (including 17 wt%), chromium powder, tin powder, lead powder, and scaly graphic powder, 5 wt%, 6 wt%, 8 wt%, respectively, 1 wt%, 1 wt%, 3 wt%, less than 1% by weight of inevitable impurities and the balance of electrolytic copper powder, the particle size is -80 mesh, mixed into the V-type mixer; mix the powder (particle size) 50 μm) is loaded into the steel mold, and the powder block is obtained by pressing the powder, and then the powder biller is heated in a sintering furnace of the sintered atmosphere of hydrogen and argon, and the temperature is 10 ° C / min, at the temperature 870 ° C insulation for 2 h, gains the sintered body; heating the forging mold to 300 ° C, the sintered body is heated to 750 ° C, move the sintered body into the forging in 5 seconds, at 1.8x10 3 KJ / M 2 Heat forging mining under the energy density, wherein the initial forging temperature is 750 ° C, and ...

Embodiment 3

[0049]Take the iron-phosphorus-phosphorus-phosphorus and phosphorus, iron-nickel predecessor (containing nickel 18 wt%), chromium powder, tin powder, lead powder, and scaly graphic powder are 5 wt%, 6 wt%, 7 wt%, respectively, 1 wt%, 1 wt%, 3 wt%, less than 1 wt% inevitable impurities and the balance of electrolytic copper powder, the particle size is 40 mesh, mixed in a V-shaped mixture; mixed powder (particle size) 30 μm) is loaded into the steel mold, and the powder block is obtained by pressing the powder, and then the powder billet is heated in a sintering furnace of a mixed gas of hydrogen and argon, and the temperature is 10 ° C / min, at temperature 870 ° C insulation for 2 h, gains the sintered body; heat the mold to 300 ° C, the sintered body is heated to 700 ° C, in 5 seconds, move the sintered body into the forging die, at 1.8x10 3 KJ / M 2 The energy density is hot forged, the initial forging temperature is 700 ° C, and the final temperature is 450 ° C. After air cool...

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Abstract

The invention provides a copper-based pantograph slide plate material obtained through powder hot forging and a preparation method thereof. The copper-based pantograph slide plate material is obtained by performing powder hot forging on the following raw material components including, by weight, 5%-6% of iron-phosphorus alloy powder with the particle size range of -80 to +300 meshes, 6%-7% of iron-nickel pre-alloy powder, 6%-9% of chromium powder, 1%-4% of tin powder, 0.5%-1% of lead powder, 2%-5% of flake graphite powder and the balance copper powder, wherein the content of phosphorus in the iron-phosphorus alloy powder is 17%-19% by weight. The copper-based pantograph slide plate material provided by the invention is uniform in structure, high in density, excellent in mechanical property and electrical property, and high in mechanical wear resistance and electrical wear resistance.

Description

Technical field [0001] The present invention relates to the field of powder metallurgy, and more particularly to a copper-based coil plate material and a preparation method thereof. Background technique [0002] The electric bow slide is an important transmission element for electrification trains. The working principle is to slide contact with elevated wires or third rails, transmit power to electric locomotives, and maintain the normal operation of the train. The electric bow slide is an important electrical contact material, and it is necessary to have electrical and electrical ablation, high conductivity, high temperature resistance, wear resistance, high mechanical strength. [0003] The high-addition component copper-based substrate-based slide material refers to the addition of a high content, a plurality of matrix components to the copper-based electro-bow slide material such that each matrix component is substantially soluble after being processed through a series of pro...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C32/00B22F3/10B22F3/17B22F3/24C22C1/05
CPCC22C9/00C22C32/0084C22C1/05B22F3/1007B22F3/17B22F3/24B22F2003/175B22F2003/248
Inventor 蒋阳汪漫仲洪海
Owner HEFEI UNIV OF TECH
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