Copper-based oil bearing material and preparation method thereof

A bearing, copper-based technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problem of narrow working temperature range, achieve the effect of improving strength and thermal conductivity, improving wear resistance, and uniform distribution

Inactive Publication Date: 2016-06-22
HEBEI UNIV OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Powder metallurgy copper-based oil-impregnated bearings are commonly used now, and are recognized as bearings with high friction reduction performance and good corrosion resistance, but their working temperature can only be within the range of -60°C-120°C, and the working temperature range is relatively narrow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1: Preparation of copper-based oil-impregnated bearing with 5% graphene-loaded nickel powder

[0014] 1) Formulated powder: the mass fraction ratio of each component in the copper-based oil-impregnated bearing is: graphene-loaded nickel powder is 5%, tin powder is 6%, the balance is copper powder, and 0.1% oleic acid is added as a dispersion agent, wherein the average particle size of the tin powder used is not greater than 45 μm, the particle size of the copper powder is not greater than 80 μm, the particle size of the graphene-supported copper particle composite powder is 80 μm, and the nickel content in the graphene-supported nickel is 50% of the total mass;

[0015] 2) Put the configured alloy powder into the planetary ball mill for ball milling and mixing. After the ball milling, press molding on the hydraulic press with a pressing pressure of 300MPa to realize the blank forming of the bearing;

[0016] 3) The formed blank is sintered in a hydrogen atmosphe...

Embodiment 2

[0018] Example 2: Preparation of copper-based oil-impregnated bearings with 8% graphene-loaded nickel powder

[0019] 1) Formulated powder: the mass fraction ratio of each component in the copper-based oil-impregnated bearing is: graphene-loaded nickel powder is 8%, tin powder is 10%, the balance is copper powder, and 0.2% oleic acid is added as a dispersion agent, wherein the average particle size of the tin powder used is not greater than 45um, the particle size of the copper powder is not greater than 80um, the particle size of the graphene-supported copper particle composite powder is 90μm, and the nickel content in the graphene-supported nickel is 60% of the total mass;

[0020] 2) Put the configured alloy powder into the planetary ball mill for ball milling and mixing. After the ball milling, press molding on the hydraulic press with a pressing pressure of 200MPa to realize the blank forming of the bearing;

[0021] 3) The formed blank is sintered in a hydrogen atmospher...

Embodiment 3

[0023] Example 3: Preparation of copper-based oil-impregnated bearings with 10% graphene-loaded nickel powder

[0024] 1) Formulated powder: The mass fraction ratio of each component in the copper-based oil-impregnated bearing is: graphene-loaded nickel powder is 10%, tin powder is 12%, and the balance is copper powder, and 0.3% oleic acid is added as a dispersion agent, wherein the average particle size of the tin powder used is not greater than 45um, the particle size of the copper powder is not greater than 80um, the particle size of the graphene-supported copper particle composite powder is 100μm, and the nickel content in the graphene-supported nickel is 60% of the total mass;

[0025] 2) Put the configured alloy powder into the planetary ball mill for ball milling and mixing. After the ball milling, press molding on the hydraulic press with a pressing pressure of 250MPa to realize the blank forming of the bearing;

[0026] 3) Sinter the formed blank in a hydrogen atmosph...

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Abstract

The invention discloses a graphene / copper oil bearing material and a preparation method thereof, and belongs to the field of graphene reinforced metal-matrix composites. Nickel powder, tin powder, copper powder and a dispersing agent are loaded on graphene according to a certain mass fraction for burdening, a planetary ball mill is used for mixing, and a graphene / copper-based oil bearing is obtained through pressing, sintering, oil immersing and die full shaping processes. The graphene is introduced by loading nickel particles on the graphene, and the purpose that graphene strengthening phases are evenly dispersed in a metal matrix to form strong interfacial chemical binding is achieved. On the other hand, copper and nickel form an infinite mutual-soluble solid solution, and the solid solution strengthening effect is achieved. The graphene / copper-based oil bearing manufactured through the method is even in structure and has good heat-conducting performance and high strength and abrasion resistance.

Description

technical field [0001] The invention belongs to the field of reinforced oil-impregnated bearings, and provides a method for preparing copper-based oil-impregnated bearings by using graphene-loaded nickel particles to reinforce copper-based composite materials. Background technique [0002] Powder metallurgy copper-based oil-impregnated bearings are commonly used now, and are recognized as bearings with high friction reduction performance and good corrosion resistance, but their working temperature can only be within the range of -60°C-120°C, and the working temperature range is relatively narrow. And for those mechanical bearings that are subject to heavy loads and high friction speeds, it becomes very important to dissipate the heat on the friction surface as soon as possible. [0003] Graphene has excellent thermal conductivity, mechanical properties and self-lubricating properties. Combining graphene and copper to achieve a "strong combination" can make the composite mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F5/00B22F1/00C22C9/06C22C9/02
CPCC22C9/02C22C9/06B22F5/00B22F2998/10B22F2999/00B22F1/10B22F3/1007B22F2201/013B22F3/26B22F2201/20B22F3/24B22F3/10B22F3/02B22F2009/043
Inventor 李美霞谢娟解秀亮李永德聂阳明
Owner HEBEI UNIV OF ENG
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