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Alloy-fluororesin double-layer self-lubricating wear-resistant composite material, preparation method and friction pair thereof

A composite material and fluororesin technology, which is applied in the field of alloy-fluororesin double-layer self-lubricating wear-resistant composite materials and friction pairs, which can solve the problems of precision and mechanical operation, large amount of wear and influence on relative spatial position, etc.

Active Publication Date: 2020-07-10
BEIJING WENLI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the solid self-lubricating materials in the prior art have a large amount of wear after long-term use, especially when used in bearings. The wear amount of the friction material directly affects the relative spatial positions of the various components, resulting in problems in precision and mechanical operation. question

Method used

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  • Alloy-fluororesin double-layer self-lubricating wear-resistant composite material, preparation method and friction pair thereof

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preparation example Construction

[0024] The invention provides a method for preparing an alloy-fluororesin double-layer self-lubricating and wear-resistant composite material, comprising the following steps:

[0025] A) Pretreating the surface of the alloy matrix to obtain an alloy matrix with a surface roughness of Ra;

[0026] B) applying the fluororesin mixture on the surface of the alloy matrix with a roughness of Ra, and performing stepwise vacuum sintering to obtain an alloy-fluororesin double-layer self-lubricating wear-resistant composite material;

[0027] The fluororesin mixture includes first fluororesin particles with a particle size of 0.5-1.2 times Ra and second fluororesin particles with a particle size of 2.5-4.0 times Ra.

[0028] In the present invention, the alloy matrix is ​​preferably a copper alloy, more preferably a wear-resistant copper alloy such as tin bronze, copper-nickel-tin, the thickness of the copper alloy matrix layer is 0.05-5mm, and the Sn content in the tin bronze is 4 ~ 1...

Embodiment 1

[0052] The copper alloy ZCuSn5Pb5Zn5 is made into a copper strip with a length of 50 mm, a width of 20 mm and a thickness of 0.1 mm. The surface of the copper strip is rolled to obtain a porous and loose structure with a surface roughness of Ra 12.5.

[0053] Degrease and perform ultrasonic cleaning, dry and put into graphite mold; dissolve tetrafluoroethylene and hexafluoropropylene copolymer (FEP) in polytetrafluoroethylene (PTFE) suspension, mass ratio 1:1, polytetrafluoroethylene (PTFE) has an average particle size of 10 microns, tetrafluoroethylene and hexafluoropropylene copolymer (FEP) has an average particle size of 30 microns, and is fully stirred and mixed to form a paste mixture; the mixture is pressed into the surface of the copper alloy strip by cold pressing, double The layer material is first dried in a vacuum sintering furnace to remove moisture and organic solvents. The drying temperature is 180 ° C, the drying time is 2 hours, the furnace is naturally cooled t...

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Abstract

The invention provides a preparation method of an alloy-fluororesin double-layer self-lubricating wear-resistant composite material. The method comprises the following steps: A) pretreating the surface of an alloy matrix to obtain an alloy matrix with surface roughness of Ra; B) applying a fluororesin mixture to the surface of the alloy matrix with surface roughness of Ra, and performing stepped vacuum sintering to obtain an alloy-fluororesin double-layer self-lubricating wear-resistant composite material; wherein the fluororesin mixture comprises first fluororesin particles with a particle size 0.5-1.2 times that of Ra and second fluororesin particles with a particle size 2.5-4.0 times that of Ra. According to the composite material prepared through the preparation method, the fluororesincoating and the alloy matrix have high binding force, better abrasion resistance is achieved, and the abrasion size is small after long-time operation and use. The invention further provides an alloy-fluororesin double-layer self-lubricating wear-resistant composite material and a friction pair.

Description

technical field [0001] The invention belongs to the technical field of friction materials, and in particular relates to an alloy-fluororesin double-layer self-lubricating wear-resistant composite material, a preparation method thereof and a friction pair. Background technique [0002] In recent years, with the development of science and technology, higher and higher requirements have been put forward for the performance of various equipment and parts. Friction and wear is a ubiquitous natural phenomenon. Statistics from the World Society of Tribology show that more than 1 / 3 of the world's primary energy is lost by friction, and the annual loss caused by wear and tear accounts for about 1% of the gross national product. In order to prolong the service life, save materials and energy, it is urgent to solve the problems of friction, wear and lubrication protection in many fields. [0003] There are four types of lubricating materials, gas lubricants, fluid (mainly oil), grease...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M161/00F16C33/04F16C33/02C10N30/06
CPCC10M161/00F16C33/04F16C33/02C10M2201/05C10M2213/062C10M2213/06
Inventor 华青松仙存妮邱瑞林魏建新
Owner BEIJING WENLI TECH CO LTD
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