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A copper-based pantograph sliding plate material hot forged by powder and its preparation method

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: 2022-04-01
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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  • A copper-based pantograph sliding plate material hot forged by powder and its preparation method
  • A copper-based pantograph sliding plate material hot forged by powder and its preparation method
  • A copper-based pantograph sliding plate material hot forged by powder and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Take by weighing iron-phosphorus prealloy powder (containing phosphorus 17wt%), iron-nickel prealloy powder (containing nickel 16t%), chromium powder, tin powder, lead powder, flake graphite powder are respectively 5wt%, 6wt%, 9wt% , 1wt%, 1wt%, 3wt%, less than 1wt% unavoidable impurities and the electrolytic copper powder of the remainder, the particle diameter is 100 orders, put into V-shaped mixer and mix uniformly; 15 μm in diameter) into a steel mold, pressed and demolded to obtain a powder compact, and then the obtained powder compact is heated up in a sintering furnace whose sintering atmosphere is a mixed gas of hydrogen and argon, and kept at a temperature of 870°C for 2 hours. Obtain a sintered body; in addition, heat the forging mold to 300°C, heat the sintered body to 800°C, and move the sintered body into the forging mold within 5 seconds, at 1.8x10 3 kJ / m 2 Hot forging densification is carried out under energy density, in which the initial forging tempera...

Embodiment 2

[0046] Take by weighing iron-phosphorus alloy powder (containing phosphorus 18wt%), iron-nickel prealloy powder (containing nickel 17wt%), chromium powder, tin powder, lead powder, flake graphite powder are respectively 5wt%, 6wt%, 8wt%, 1wt%, 1wt%, 3wt%, less than 1wt% unavoidable impurities and the electrolytic copper powder of the remainder, the particle diameter is -80 mesh, put into the V-shaped mixer and mix evenly; mix the powder (particle diameter 50 μm) into a steel mold, and the powder compact was obtained by pressing and demolding, and then the powder compact was heated in a sintering furnace whose sintering atmosphere was a mixture of hydrogen and argon, with a heating rate of 10°C / min. Heat at 870°C for 2 hours to obtain a sintered body; heat the forging mold to 300°C, heat the sintered billet to 750°C, and move the sintered body into the forging mold within 5 seconds. 3 kJ / m 2 Hot forging densification is carried out under energy density, where the initial forgi...

Embodiment 3

[0049]Take by weighing iron-phosphorus alloy powder (containing phosphorus 19wt%), iron-nickel prealloy powder (containing nickel 18wt%), chromium powder, tin powder, lead powder, flake graphite powder are respectively 5wt%, 6wt%, 7wt%, 1wt%, 1wt%, 3wt%, less than 1wt% unavoidable impurity and the electrolytic copper powder of surplus, particle diameter is 40 orders, puts into V-type mixer and mixes uniformly; Mix powder (particle diameter 30 μm) into a steel mold, and the powder compact was obtained by pressing and demolding, and then the powder compact was heated in a sintering furnace whose sintering atmosphere was a mixture of hydrogen and argon, with a heating rate of 10°C / min. Heat at 870°C for 2 hours to obtain a sintered body; heat the mold to 300°C, heat the sintered body to 700°C, and within 5 seconds, move the sintered body into the forging die, 3 kJ / m 2 Hot forging is carried out under energy density, the initial forging temperature is 700°C, the final forging tem...

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Abstract

The invention provides a copper-based pantograph sliding plate material hot-forged from powder and a preparation method thereof. The copper-based pantograph sliding plate material is obtained by powder hot forging of the following raw material components: iron-phosphorus alloy powder 5-6 wt%, particle size range -80-+300 mesh, wherein, in the iron-phosphorus alloy powder Phosphorus content in phosphorus alloy powder is 17wt~19wt%; iron-nickel pre-alloyed powder 6~7wt%; chromium powder 6~9wt%; tin powder 1~4wt%; lead powder 0.5~1wt%; flake graphite powder 2~ 5wt%, the balance is copper powder. The copper-based pantograph sliding plate material provided by the present invention has uniform structure, high density, excellent mechanical and electrical properties, and strong resistance to mechanical wear and electrical wear.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a powder hot-forged copper-based pantograph sliding plate material and a preparation method thereof. Background technique [0002] The pantograph slide is an important power transmission component of an electrified train. Its working principle is to make sliding contact with the overhead wire or the third rail to transmit power to the electric locomotive to maintain the normal operation of the train. As an important electrical contact material, the pantograph slide needs to be resistant to spark ablation, high electrical conductivity, high temperature resistance, wear resistance, and high mechanical strength. [0003] Highly added component copper-based pantograph slide material refers to the addition of high content and various types of matrix components to the copper-based pantograph slide material, so that each matrix component can basically be solid-soluble in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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