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Leadless copper base high temperature self lubricating composite material

A high-temperature self-lubricating and composite material technology, applied in metal material coating technology, gaseous chemical plating, coating, etc., can solve the problems of high temperature resistance, improve heat resistance, improve interface bonding strength, and improve resistance Effect of High Temperature Creep Properties

Inactive Publication Date: 2006-01-11
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

However, both the coating material and the Cu-Sn-Ag bearing alloy have the problem of not being resistant to high temperature

Method used

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  • Leadless copper base high temperature self lubricating composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Use tin bronze pre-alloyed powder, add -200 mesh nickel powder, iron powder, ultra-fine boron nitride powder and graphite powder and carbon fiber after surface composite plating. The graphite powder is flaky natural graphite powder, the carbon fiber diameter is 5-10 μm, the length is 1-3 mm, and the carbon fiber accounts for 0.5-3% of the total volume of the material. Graphite powder and carbon fiber are respectively electroless plated, first copper plated and then iron plated to form a composite coating of Cu+Fe. The specific chemical composition is shown in Table 1.

[0022] the element

Ni

C

sn

BN

Zn

Fe

Cu

W(％)

10

8

6

0.5

6

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 mould, and press it into a green compact with a unit pressure of 400MPa on a hydraulic press. Put the green compact i...

Embodiment 2

[0031] Use tin bronze pre-alloyed powder, add -200 mesh nickel powder, iron powder, ultra-fine boron nitride powder and graphite powder and carbon fiber after surface composite plating. The graphite powder is flaky natural graphite powder, the carbon fiber diameter is 5-10 μm, the length is 1-3 mm, and the carbon fiber accounts for 0.5-3% of the total volume of the material. Electroless plating is used for graphite powder and carbon fiber, nickel-phosphorus alloy is first plated and then copper is plated to form a composite coating of Ni-P+Cu. 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 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 shown in Table 5, and the friction and wear properties are shown in Table 6.

[0034] ...

Embodiment 3

[0037] Use tin bronze pre-alloyed powder, add -200 mesh nickel powder, iron powder, ultra-fine boron nitride and graphite powder and carbon fiber after surface composite plating. The graphite powder is flaky natural graphite powder, the carbon fiber diameter is 5-10 μm, the length is 1-3 mm, and the carbon fiber accounts for 0.5-3% of the total volume of the material. Graphite powder and carbon fiber are electroless plated, copper plated first and then iron plated to form a Cu+Fe composite coating. The specific chemical composition is shown in Table 7.

[0038] the element

[0039] 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 400MPa, and press it into a green compact of the desired shape, put the green compact into an ammonia decomposition protective atmosphere, sinter at a temperature of 850°C, and keep it warm for 60 minutes. Then repress and rebu...

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Abstract

A high-temp self-lubricating non-Pb Cu-base composition has a chemical formula: Ni+C+Sn+Zn+MX+Fe+Cu, where MX is chosen from BN, Si3N4, SiC, Al2O3, TiN, TiC and Cr3 C2 and C is graphite and carbon fibres. It has anti-oxidizing, anti-corrosion and high-temp anti-wear characteristics.

Description

Technical field: [0001] The invention relates to a self-lubricating composite material, in particular to a lead-free copper-based high-temperature self-lubricating composite material. Background technique: [0002] For copper-based powder metallurgy oil-impregnated bearings and copper-based alloy bearing bushes, the lubricants are mostly various lubricating greases. When the temperature exceeds 350°C and reaches 500°C, the strength of the matrix decreases due to the decomposition of lubricating grease, resulting in an increase in the friction coefficient of the material and poor wear resistance. Reduced, the wear and tear increased rapidly and failed. Metal lead has the characteristics of soft and easy to deform, low melting point, good affinity with lubricating oil, boundary lubrication characteristics and low price. Lead-containing tin bronze has excellent tribological characteristics, oxidation resistance and corrosion resistance. And other properties, widely used in sli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C9/06C22C1/05C23C16/06
Inventor 徐伟马少波
Owner 合肥波林新材料股份有限公司
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