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Copper-based powder metallurgical pantograph sliding plate material taking spherical chromium powder as strengthening phase and preparation method thereof

A technology of pantograph sliding plate and powder metallurgy, which is applied in the field of copper-based powder metallurgy pantograph sliding plate material and its preparation, can solve the problems of expensive plasma discharge sintering system, cost reduction, industrialized production, and complicated processing technology, and achieve Improve the performance of anti-arc ablation, increase the density of the green body, and the effect of simple process

Active Publication Date: 2019-01-11
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the carbon fiber surface alloying process is complicated, and the plasma discharge sintering system is expensive, which is not conducive to cost reduction and industrial production

Method used

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  • Copper-based powder metallurgical pantograph sliding plate material taking spherical chromium powder as strengthening phase and preparation method thereof
  • Copper-based powder metallurgical pantograph sliding plate material taking spherical chromium powder as strengthening phase and preparation method thereof
  • Copper-based powder metallurgical pantograph sliding plate material taking spherical chromium powder as strengthening phase and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] According to the following mass percentages: Cu 87.5wt%, spherical Cr 2wt%, Sn 7wt%, Ni 3wt%, graphite 0.5wt%, weigh the powder, pre-mix it on an ordinary horizontal mixer for 2 hours, and then put the powder into V-shaped The materials were mixed in the mixer for 2 hours, cold-pressed at 800MPa, sintered in the atmosphere of decomposed ammonia, and kept at 950°C for 2 hours; then air-cooled in the furnace to obtain the copper-based powder metallurgy sliding plate material.

Embodiment 2

[0034] According to the following mass percentages: Cu 87wt%, spherical Cr 2wt%, Sn 7wt%, Ni 3wt%, graphite 1wt%, weigh the powder, pre-mix it on an ordinary horizontal mixer for 2 hours, and then put the powder into the V-type mixer Mix the material for 2 hours, cold press it at 800MPa, sinter in the atmosphere of decomposed ammonia, and keep it at 950°C for 2 hours; then air-cool in the furnace to obtain the copper-based powder metallurgy sliding plate material.

Embodiment 3

[0036] According to the following mass percentages: Cu 86wt%, spherical Cr 2wt%, Sn 7wt%, Ni 3wt%, graphite 2wt%, weigh the powder, pre-mix it on an ordinary horizontal mixer for 2 hours, and then put the powder into the V-type mixer Mix the material for 2 hours, cold press it at 800MPa, sinter in the atmosphere of decomposed ammonia, and keep it at 950°C for 2 hours; then air-cool in the furnace to obtain the copper-based powder metallurgy sliding plate material.

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Abstract

The invention discloses a copper-based powder metallurgical pantograph sliding plate material taking spherical chromium powder as a strengthening phase and a preparation method thereof. The copper-based powder metallurgical pantograph sliding plate material taking the spherical chromium powder as the strengthening phase is prepared from the following components in percentage by mass: 75 to 85 weight percent of Cu, 1 to 10 weight percent of the spherical chromium powder, 1 to 5 weight percent of Pb, 5 to 10 weight percent of Sn, 1 to 5 weight percent of Ni, 0.5 to 2 weight percent of flake graphite and 0.5 to 2 weight percent of molybdenum disulfide. The copper-based powder metallurgical pantograph sliding plate material prepared by the invention has excellent mechanical properties, good wear resistance and self-lubricating performance, low resistivity, high strength and good arc extinguishing performance. The copper-based powder metallurgical pantograph sliding plate material providedby the invention is mainly used for power-taking elements of urban rail transit and low-speed heavy-duty locomotives.

Description

technical field [0001] The invention relates to a copper-based powder metallurgy pantograph sliding plate material with spherical chromium powder as a strengthening phase and a preparation method thereof. Background technique [0002] Since the beginning of the 21st century, my country's economy has developed rapidly, the level of urbanization has continued to increase, the scale of cities has continued to expand, and the urban population and resource consumption have also increased rapidly. In order to meet the needs of urban transportation and transportation of bulk mineral resources, urban rail transit and heavy-duty freight railways from resource producing areas to large and medium-sized cities have been built in various places in recent years. As an important power-taking component of an electric locomotive, the pantograph slide must have high thermal conductivity, sufficient mechanical strength, excellent electrical conductivity, high arc resistance, good wear resistan...

Claims

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Application Information

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IPC IPC(8): C22C9/02C22C1/10
CPCC22C1/10C22C9/02
Inventor 蒋阳胥恩泽黄建祥李姚传仲洪海刘君武
Owner HEFEI UNIV OF TECH
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