A kind of high wear-resistant copper-based material and its preparation method

A high wear-resistant, copper-based technology, applied in the field of high wear-resistant copper-based materials and their preparation, can solve the problems of difficult control of the modification process, low product density, complicated preparation process, etc. The effect of low cost and simple preparation process

Inactive Publication Date: 2018-06-29
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many practical application problems in the research of C / Cu composite materials at home and abroad that have not been satisfactorily resolved, mainly because graphite is a soft phase, and its strong adhesion makes it easy to reunite with each other. The parallel layered structure of graphite is not easy to be uniform in the process of mixing with copper powder, and segregation occurs. It is necessary to modify the surface of graphite to improve the interface strength, such as chemical method, electroplating method, etc.
Even so, there are still the following disadvantages: (1) The preparation process is complicated and the energy consumption is large (2) The modification process is not easy to control and the production efficiency is low (3) The product density is not high and the porosity is large

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  • A kind of high wear-resistant copper-based material and its preparation method
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  • A kind of high wear-resistant copper-based material and its preparation method

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preparation example Construction

[0045] A method for preparing a high-wear-resistant copper-based material, the composition of the high-wear-resistant copper-based material is as described above, and the preparation method includes the following steps:

[0046] 1) ball milling the boron nitride and strengthening phase powder, adding water to mix, and refining the mud to obtain the mud;

[0047] 2) Dry the mud, heat-preserve and roast completely at 800-1100°C to obtain roasted material;

[0048]3) ball milling the calcined material, mixing it with tin bronze powder, adding polyacrylamide solution, refining mud and drying;

[0049] 4) The powder is placed in a mold, and cold-pressed to obtain a green compact;

[0050] 5) Heat the compact to 500-600°C for pre-calcination, then heat it up to 800-950°C for roasting, and obtain a primary sintered body after cooling;

[0051] 6) Repress the primary sintered body, and refire completely at 800-950°C to obtain profiles.

[0052] The function of roasting in step 1) i...

Embodiment 1

[0059] A modified copper-based pantograph sliding plate material, made of the following volume fractions of raw materials: V (CuSn10): V (boron nitride): V (strengthening phase) = 82:10:8, each component of the strengthening phase The mass ratio is: W(Cr 3 C 2 ): W(Mo 2 C): W (WC): W (Zn) = 10: 10: 10: 70; wherein, the tin bronze powder and other strengthening phase component powders are both 300 mesh, and the Sn content in the tin bronze powder is about 10%.

[0060] Preparation:

[0061] 1) ball milling the boron nitride and strengthening phase powder, adding water to mix, and refining the mud to obtain the mud;

[0062] 2) Dry the mud, and heat-preserve and roast at 1100°C for 90 minutes to obtain the roasted material;

[0063] 3) Ball mill the calcined material, mix it with tin bronze powder, add 3mol / L polyacrylamide solution, smelt and dry;

[0064] 4) Put the powder in the mold, 1T / cm 2 Cold pressing under pressure to obtain a compact;

[0065] 5) Pre-fire the gr...

Embodiment 2

[0069] A modified copper-based pantograph sliding plate material, made of the following volume fractions of raw materials: V (CuSn10): V (boron nitride): V (strengthening phase) = 83:9:8, each component of the strengthening phase The mass ratio is: W(Cr 3 C 2 ): W(Mo 2 C): W (WC): W (Zn) = 8: 6: 9: 77; wherein, the tin bronze powder and other strengthening phase component powders are both 400 mesh, and the Sn content in the tin bronze powder is about 10%.

[0070] Preparation:

[0071] 1) ball milling the boron nitride and strengthening phase powder, adding water to mix, and refining the mud to obtain the mud;

[0072] 2) Dry the mud material, heat-preserve and roast it at 1000°C for 100 minutes to obtain the roasted material;

[0073] 3) Ball mill the calcined material, mix it with tin bronze powder, add 3mol / L polyacrylamide solution, smelt and dry;

[0074] 4) Put the powder in the mold, 1.5T / cm 2 Cold pressing under pressure to obtain a compact;

[0075] 5) Pre-fire...

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Abstract

The invention discloses a high-wear-resistance copper base material and a preparation method thereof. The high-wear-resistance copper base material consists of tin bronze powder, boron nitride and a strengthening phase. The material overcomes the problem of no wetting of a copper-boron nitride interface; a prepared composite material has such advantages as low electrical resistivity, good impact resistance, low friction coefficient, high bending strength and high hardness, and also has the advantages of high strength and low electrical resistivity in a traditional tin bronze base slide plate material and good lubricating performance in boron nitride; and meanwhile, the preparation method is simple in process, liable to control the technological process, free of pollution and suitable for large-scale production.

Description

technical field [0001] The invention relates to a novel high-wear-resistant copper-based material and a preparation method thereof, in particular to a high-wear-resistant copper-based material which can be used for preparing a pantograph slide plate of a novel electric locomotive and a preparation method thereof. Background technique [0002] With the rapid development of high-speed railways in my country, as the most important current-collecting components of high-speed trains, the amount of pantograph slides is increasing, so the requirements for slide materials continue to increase. [0003] The development trend of skateboards is mainly based on carbon fiber skateboards, carbon fiber skateboards, metal matrix composites and non-metal matrix composites with self-lubricating and other lubricating functions. Graphite / copper composite materials play an important role in pantograph sliding plate materials due to their high strength, good electrical and thermal conductivity, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/02C22C32/00C22C1/05
CPCC22C1/05C22C9/02C22C32/0047
Inventor 王斌李婷
Owner CENT SOUTH UNIV
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