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Method for preparing sliding bearing of nano AI2O3/polyimide friction compound material

A polyimide, composite material technology, applied in bearing components, shafts and bearings, other manufacturing equipment/tools, etc., can solve the problems of only reaching 250 ℃, no composite material bearing, poor high temperature resistance, etc. The effect of low friction coefficient and wear rate, good self-lubricating performance and excellent performance

Inactive Publication Date: 2008-01-30
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the resin matrix used is fluoroplastic, and its high temperature resistance is relatively poor, and the maximum operating temperature can only reach 250°C
[0005] The Chinese invention patent with the publication number CN1445284A discloses a polyimide material filled with nano-zinc oxide, which has excellent mechanical properties, heat resistance and tribological properties, but has not yet been applied to composite material bearings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The composition weight percent of the composite sliding bearing polymer layer is: PMR-15 polyimide molding powder: 70%, polytetrafluoroethylene 15%, nanometer Al 2 o 3 : 10%, the average diameter is between 30 and 50 nanometers, lead powder: 5%.

[0020] The manufacturing process of the composite material bearing is as follows: First, a layer of bronze powder is spread on the steel plate, the thickness of the bronze powder is 0.4 mm, the bronze powder and the steel plate are sintered together at 800 ° C, and then the above polyimide molding powder, PTFE, Nano Al 2 o 3 , Lead powder are fully mixed and stirred evenly. Under the pressure of 30MPa, it is rolled on the steel plate with the intermediate layer of sintered bronze powder, the thickness of the polymer layer is 10 mm, and then sintered under the condition of nitrogen protection at 400 ° C, and then it is machined and modified to remove burrs and rolled. , Welded composite material bearings with a diameter of ...

Embodiment 2

[0023] Adjust the raw material ratio of the polymer layer, the weight percentage of each component is as follows: PMR-15 polyimide molding powder: 80%, polytetrafluoroethylene: 10%, nanometer Al 2 o 3 : 5%, lead powder 5%.

[0024] The preparation process of the composite material bearing is the same as in Example 1, and its tribological properties are tested. The ultimate load is 160.5kg, the failure temperature is 360°C, and the PV value is 1.63MPa.m / s.

Embodiment 3

[0026] The weight percent of composite raw material components is: PMR-15 polyimide molding powder: 95%, polytetrafluoroethylene 2.5%, nanometer Al 2 o 3 : 1.5%, lead powder 1%.

[0027] The manufacturing process of the composite material bearing is the same as in Example 1. The ultimate load is slightly lowered to 146.7kg, but the friction coefficient becomes smaller, the failure temperature is 357°C, and the PV value is 1.62MPa.m / s.

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Abstract

This invention relates to preparation method for nano Al2O3 / polyimide composite material sliding bearing. First sinter one layer bronze power as interlayer on steel plate surface; roll one polyimide layer included nano Al2O3; by sintering on condition of nitrogen protection, mechanical working adornment and wrapped welding, obtain bearing; wherein, material composed weight per cent is: polyimide 70-95%, poly 2.5-15%, nano Al2O3 1.5-10% and lead power 1-5%. The product has well mechanical property and frictional behavior, and fit to oil-free lubrication situations of machine, foodstuff, aeronautics and astronautics.

Description

technical field [0001] The present invention relates to a kind of preparation method of novel nano-friction composite sliding bearing, especially to a kind of containing nano-Al 2 o 3 The invention discloses a method for preparing a sliding bearing made of polyimide friction composite material, which belongs to the technical field of processing new mechanical parts. Background technique [0002] Composite material sliding bearing is a new type of oil-free lubricating sliding bearing, which is widely used in some industrial sectors at home and abroad. This kind of bearing material is based on steel plate, a layer of bronze powder is sintered on the base material as the middle layer, and a layer of polymer plastic or polymer composite material is rolled on it as the surface layer, which can be self-lubricated. It makes full use of the rigidity of the metal and the excellent self-lubricating properties of the plastic, thereby making up for the shortcomings of the unstable siz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P23/04F16C33/12
Inventor 程先华吴炬
Owner SHANGHAI JIAO TONG UNIV
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