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Copper-base high-temperature self-lubricating composite material

A high-temperature self-lubricating and composite material technology, applied in mechanical equipment, bearing components, shafts and bearings, etc., can solve problems such as copper-based self-lubricating materials that have not been seen yet, and achieve low cost, high economic benefits, and wide application fields Effect

Inactive Publication Date: 2005-07-20
合肥波林新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there has been no report of a copper-based self-lubricating material that can work at 500°C

Method used

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  • Copper-base high-temperature self-lubricating composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Use 6-6-3 tin bronze pre-alloyed powder, add -200 mesh nickel powder, molybdenum powder, iron powder and graphite powder and carbon fiber after surface composite plating. Graphite powder is flake natural graphite powder, carbon fiber diameter is 5-10μm, length is 1-3mm. Graphite powder and carbon fiber are electroless plated, the copper layer is plated first, and then the nickel layer is plated to form a Cu+Ni composite coating. The specific chemical composition is shown in Table 1.

[0022] the element

Ni

C

sn

Pb

Zn

Mo

Fe

Cu

W(％)

10

8

6

3

6

1

1.5

margin

[0023] Put the above raw materials into a "V" type mixer and mix for 2 hours.

[0024] Put the mixed material into a steel mold, press the unit pressure on the hydraulic press to 600MPa, and press it into a green compact of the desired shape. Put the green compact into an ammonia decomposition pro...

Embodiment 2

[0031] Use 5-5-5 tin bronze pre-alloyed powder, add -200 mesh nickel powder, molybdenum powder, iron powder and graphite powder and carbon fiber after surface composite plating. Graphite powder is flake-like non-combustible graphite powder, the carbon fiber diameter is 5-10μm, and the length is 1-3mm. Graphite powder and carbon fiber are electroless plated, copper is plated first, and then nickel is plated to form a Cu+Fe composite coating. The specific chemical composition is shown in Table 4.

[0032] the element

[0033] Put the above raw materials into a "V" type mixer and mix for 2 hours. Put the mixed material into a steel mold, press the unit pressure on the hydraulic press to 600MPa, and press it into a green compact of the desired shape, put the green compact in an ammonia decomposition protective atmosphere, sinter at 850°C, and keep it warm for 60 minutes. Then repress and reburn. The mechanical properties of the composite materials are shown in Table 5...

Embodiment 3

[0037] Use 4-4-2 tin bronze pre-alloyed powder, add -200 mesh nickel powder, molybdenum powder, iron powder and graphite powder and carbon fiber after surface composite plating. Graphite powder is flake natural graphite powder, carbon fiber diameter is 5-10μm, length is 1-3mm. Graphite powder and carbon fiber are electroless plated, the copper layer is plated first, and then the nickel layer is plated to form a Cu+Ni composite coating. The specific chemical composition is shown in Table 1.

[0038] the element

[0039] Put the above raw materials into a "V" type mixer and mix for 2 hours. Put the mixed material into the graphite mold, and press it into the green compact of the desired shape on the hot press. The mechanical properties of the composite materials are listed in Table 8. The friction and wear properties of the composite materials are shown in Table 9.

[0040] density

[0041] temperature

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Abstract

The invention is a type of composite material with properties as aldary palosome, resistance to high temperature and self lubricating capability. It has following characters: its palosome is aldary while component element of self-lubricating is black lead and the percentages by weight of its composition is respectively: Ni 5-15+C 5-15+Sn 4-8+Zn 4-8+Pb 2-5+Mn 0.5-3+Fe 1-3+Cu. This type of composite material has inoxidizability, resistance to corrosion, resistance to high temperature and wearability etc. It mainly used to axletrees and leading cover with the temperature between 200-500Deg.C.

Description

Technical field: [0001] The invention relates to a self-lubricating composite material, in particular to a copper-based high-temperature self-lubricating composite material. Background technique: [0002] For copper-based powder metallurgy oil-impregnated bearings and copper-based alloy bearings, the lubricants are mostly various lubricating greases. When the temperature exceeds 350°C, especially at 500°C, the matrix strength decreases due to the decomposition of lubricating grease, resulting in an increase in the friction coefficient of the material. , the wear resistance decreases, and the wear suddenly increases and fails. So far, there have been no reports of copper-based self-lubricating materials that can work at 500°C. Invention content: [0003] The technical problem to be solved by the present invention is to provide a copper-based self-lubricating composite material that can work normally at 500°C. [0004] The technical scheme that the present invention solves...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C47/00F16C33/12F16C33/14
Inventor 徐伟孟凡纪
Owner 合肥波林新材料股份有限公司
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