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Metal-matrix self-lubricating composite bearing material and preparation method thereof

A composite bearing and metal technology, which is applied in the field of sliding bearing materials, can solve problems such as poor compatibility, and achieve the effects of stable performance, high uniformity of performance, and low cost

Inactive Publication Date: 2011-08-31
刘利利 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the present invention provides a metal-based self-lubricating composite bearing material and a preparation method thereof. The present invention uses chemical composite plating technology to modify the graphite surface, which solves the problem of graphite and copper powder The problem of poor compatibility between

Method used

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  • Metal-matrix self-lubricating composite bearing material and preparation method thereof
  • Metal-matrix self-lubricating composite bearing material and preparation method thereof
  • Metal-matrix self-lubricating composite bearing material and preparation method thereof

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Effect test

Embodiment 1

[0016] The composition and mass fraction of metal-based self-lubricating composite bearing materials are: 5% lead powder, 13% tin powder, 20% copper-coated graphite powder, and the balance is copper powder. Mix the above materials evenly and coat on the surface of the base material, sinter in an ammonia decomposition atmosphere, the sintering temperature is 450°C, after cooling, roll to increase the density, and perform secondary sintering after leveling, the sintering temperature is 500°C , followed by heat treatment to obtain the final product.

Embodiment 2

[0018] The composition and mass fraction of metal-based self-lubricating composite bearing materials are: 5% lead powder, 13% tin powder, 16% copper-coated graphite powder, and the balance is copper powder. Mix the above materials evenly and coat on the surface of the base material, sinter in an ammonia decomposition atmosphere, the sintering temperature is 550°C, after cooling, roll to increase the density, and perform secondary sintering after leveling, the sintering temperature is 600°C , followed by heat treatment to obtain the final product.

Embodiment 3

[0020] The composition and mass fraction of metal-based self-lubricating composite bearing materials are: 5% lead powder, 13% tin powder, 12% copper-coated graphite powder, and the balance is copper powder. Mix the above materials evenly and coat on the surface of the base material, sinter in an ammonia decomposition atmosphere, the sintering temperature is 750°C, after cooling, roll to increase the density, and perform secondary sintering after leveling, the sintering temperature is 650°C , followed by heat treatment to obtain the final product.

[0021] The performance parameters of the product obtained according to the above formula and process are shown in the table below.

[0022]

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Abstract

The invention discloses a metal-matrix self-lubricating composite bearing material and a preparation method thereof. The metal-matrix self-lubricating composite bearing material is prepared from the following raw materials in percentage by weight: 10-25 percent copper-plated graphite powder, 5-15 percent of tin powder, and the balance of copper powder. The material also comprises less than or equal to 10wt% of lead powder. The raw materials are mixed evenly in proportion and then are coated on the surface of a matrix material, secondary sintering is carried out under the mixing atmosphere of N2 and H2, and thermal treatment is carried out to obtain a finished product. The invention adopts a method of combining powder metallurgy liquid-phase sintering technology with an infiltration technology, so that the product compactness is improved, the mechanical property is excellent, and the cost is low, thus truly realizing the metallurgy combination of metal and graphite; and the whole composite material forms an organic integral, so that the performance homogenization level is high, the performance is stable, the process controllability is good, the tribology property is obviously improved, the technical advantage and cost advantage are excellent, thus having a good market prospect.

Description

technical field [0001] The invention relates to a sliding bearing material, in particular to a metal-based self-lubricating composite bearing material and a preparation method thereof. Background technique [0002] As an important sliding friction application material, copper alloy is widely used in various friction occasions, and the development of various composite materials is also changing with each passing day. Copper and copper alloys occupy a place in the sliding bearing industry due to their excellent comprehensive performance. [0003] At present, there are two main manufacturing technologies for copper alloy and graphite composite sliding bearings. One is to use powder metallurgy technology to make copper / graphite composite materials, because of its good wear-reducing and wear-resisting properties, high temperature resistance, oxidation resistance and corrosion resistance, etc.; but the sliding parts manufactured by it are low in graphite. At this time, under dry...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C1/05C22C1/10
Inventor 刘利利
Owner 刘利利