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Self-lubricating bearing and preparation method thereof

A technology of self-lubricating bearings and self-lubricating coatings, which is applied in the field of bearing manufacturing to achieve high hardness and self-lubricating properties, good toughness, and the effect of improving bearing life

Active Publication Date: 2017-12-12
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there have been studies on laser cladding of various ceramic or cermet coatings on the surface of titanium alloys and aluminum alloys, but the preparation of ceramic coating self-lubricating bearings containing graphene and calcium fluoride by laser cladding technology on the chromium alloy Research not yet reported

Method used

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  • Self-lubricating bearing and preparation method thereof
  • Self-lubricating bearing and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] A self-lubricating bearing such as figure 1 As shown, the base material 1 is GCr15 bearing steel, the working surface of the bearing is graphene / calcium fluoride / ceramic self-lubricating coating 2, the mixed raw material powder of graphene / calcium fluoride / ceramic self-lubricating coating, using CO 2 Laser coating technology uses synchronous powder feeding to clad on the surface of the base material, which is obtained from lubricated bearings.

[0024] The above-mentioned self-lubricating bearing is prepared through the following steps:

[0025] (1) Add alumina-coated graphene and alumina-coated calcium fluoride powder to nickel-coated alumina, nickel-coated silicon nitride, titanium carbide and nickel powder to configure a mixed powder, the mixed powder includes: 34% Nickel-coated alumina, 35% nickel-coated silicon nitride, 5% alumina-coated graphene, 5% alumina-coated calcium fluoride, 20% titanium carbide, 1% nickel, the sum of the weight percentages of each powder ...

Embodiment 2

[0029] A self-lubricating bearing is a deep groove ball bearing, such as figure 2 As shown, the inner ring base 3 and the outer ring base 4 are GCr15SiMn alloy steel, the working surface of the bearing is graphene / calcium fluoride / ceramic self-lubricating coating 2, and the middle position is a ball 5. Mixed raw material powder of graphene / CaF2 / ceramic self-lubricating coating, utilizing CO 2 Laser coating technology uses synchronous powder feeding to clad on the surface of the base material, which is obtained from lubricated bearings.

[0030] The above-mentioned self-lubricating bearing is prepared through the following steps:

[0031] (1) adding alumina-coated graphene and alumina-coated calcium fluoride powder to nickel-coated alumina, nickel-coated silicon nitride, titanium carbide and nickel powder to configure a mixed powder, the mixed powder includes: 40% Nickel-coated alumina, 20% nickel-coated silicon nitride, 8% alumina-coated graphene, 6% alumina-coated calcium ...

Embodiment 3

[0035] A self-lubricating bearing is a thrust ball bearing, such as image 3 As shown, the base material 1 is GCr15 bearing steel, and the working surface of the bearing is graphene / calcium fluoride / ceramic self-lubricating coating 2. Mixed raw material powder of graphene / CaF2 / ceramic self-lubricating coating, utilizing CO 2 Laser coating technology uses synchronous powder feeding to clad on the surface of the base material, which is obtained from lubricated bearings.

[0036] The above-mentioned self-lubricating bearing is prepared through the following steps:

[0037] (1) Adding alumina-coated graphene and alumina-coated calcium fluoride powder to nickel-coated alumina, nickel-coated silicon nitride, titanium carbide and nickel powder to configure a mixed powder, the mixed powder includes: 49.5% Nickel-coated alumina, 20% nickel-coated silicon nitride, 5% alumina-coated graphene, 5% alumina-coated calcium fluoride, 20% titanium carbide, 0.5% nickel, the sum of the weight p...

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Abstract

The invention discloses a self-lubricating bearing and a preparation method thereof. According to the self-lubricating bearing, chromium-containing alloy steel is used as a matrix, the working surface of the matrix is a graphene / calcium fluoride / ceramic self-lubricating coating, the coating comprises 30%-50% of nickel-coated aluminum oxide, 20%-40% of nickel-coated silicon nitride, 5%-8% of aluminum-oxide-coated graphene, 5%-8% of aluminum-oxide-coated calcium fluoride, 20%-30% of titanium carbide and 0.5%-2% of nickel, and the sum of weight percentages of all powder is 100%. Graphene and calcium fluoride powder are added in ceramic mixed powder, and the self-lubricating coating is formed on the surface of the matrix material in a fusion covering manner by a laser synchronous powder feeding mode. In the self-lubricating bearing prepared by the method, the binding force between the metal matrix and the self-lubricating coating is large; and meanwhile, the self-lubricating bearing has the characteristics of high surface hardness, good wear resistance and the like. In the working process, a continuous solid lubricating film can be formed on the working surface by means of the self-lubricating coating, and therefore, the self-lubricating function of the bearing is fulfilled.

Description

technical field [0001] The invention belongs to the technical field of bearing manufacture, and in particular relates to a self-lubricating bearing and a preparation method thereof. Background technique [0002] Bearing is an extremely common key part used in the industry. Its basic function is to provide force support and motion conversion for rotating machinery and oscillating machinery, reduce the friction coefficient of the equipment during the transmission process, and ensure the normal operation of the equipment. At present, most of the bearing materials are metal and ceramic materials. The surface hardness of metal materials is relatively low, the friction coefficient is large, the bearing capacity is low, and the wear is serious. Lubricants are usually used in the working process; the surface hardness of ceramic materials is relatively high. High, good wear resistance, but its brittleness is relatively large, and its impact resistance is poor. In order to reduce the...

Claims

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Application Information

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IPC IPC(8): C23C24/10B22F1/00
CPCB22F1/0003C23C24/103
Inventor 邢佑强吴泽胡涛孙东科刘晓军莫景文
Owner SOUTHEAST UNIV
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