Method for manufacturing dispersion strengthening copper-based oil bearing

A technology for dispersion-strengthened copper and bearings, applied in the field of dispersion-strengthened metal material preparation, which can solve the problems of shaft seizure, sticking, and narrow working temperature range.

Active Publication Date: 2015-03-25
JIANGDU LEADER POWDER METALLURGY
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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
Moreover, traditional copper-based powder metallurgy oil-impregnated bearings are only suitable for small and medium loads and high speeds to achieve hydrodynamic lubrication. Shaft seized

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1: 1% Y 2 o 3 Dispersion strengthened copper base oil-impregnated bearing

[0013] 1) Prepare powder. The ratio of each component in the dispersion-strengthened copper-based oil-impregnated bearing is: 4% aluminum powder, 8% tin powder, 5% graphite powder, 1% nano-yttrium oxide powder, and the balance is copper powder. The particle size of the yttrium oxide used therein is 10-20 nm. The average particle size of aluminum powder and tin powder is not greater than 50 μm, graphite powder is -325 mesh, and the particle size of copper powder is not greater than 100 μm. And add 0.05% oleic acid as a dispersant.

[0014] 2) Put the configured alloy powder into a frequency conversion high-energy vibration ball mill for high-energy ball milling. The volume ratio of the ball to material used is 5:1, the vibration frequency of the ball mill is 30Hz, and the ball milling time is 10h, excluding downtime. Stop for 1 hour every 5 hours of ball milling to prevent the tempe...

Embodiment 2

[0018] Example 2: 1.5% Y 2 o 3 Dispersion strengthened copper base oil-impregnated bearing

[0019] 1) Prepare powder. The ratio of each component in the dispersion strengthened copper-based oil-impregnated bearing is: 6% aluminum powder, 10% tin powder, 3% graphite powder, 1.5% nanometer yttrium oxide powder, and the balance is copper powder. The particle size of the yttrium oxide used therein was 15 nm. The average particle size of aluminum powder and tin powder is not greater than 50 μm, graphite powder is -325 mesh, and the particle size of copper powder is not greater than 100 μm. And add 0.05% oleic acid as a dispersant.

[0020] 2) Put the configured alloy powder into a frequency conversion high-energy vibration ball mill for high-energy ball milling. The volume ratio of the ball to material used is 8:1, the vibration frequency of the ball mill is 40Hz, and the ball milling time is 15h, excluding downtime. Stop for 1 hour every 5 hours of ball milling to prevent t...

Embodiment 3

[0024] Example 3: 2% Y 2 o 3 Dispersion strengthened copper base oil-impregnated bearing

[0025] 1) Prepare powder. The ratio of each component in the dispersion strengthened copper-based oil-impregnated bearing is: 8% aluminum powder, 12% tin powder, 5% graphite powder, 2% nanometer yttrium oxide powder, and the balance is copper powder. The particle size of the yttrium oxide used therein was 20 nm. The average particle size of aluminum powder and tin powder is not greater than 50 μm, graphite powder is -325 mesh, and the particle size of copper powder is not greater than 100 μm. And add 0.05% oleic acid as a dispersant.

[0026] 2) Put the configured alloy powder into a frequency conversion high-energy vibration ball mill for high-energy ball milling. The volume ratio of the ball to material used is 10:1, the vibration frequency of the ball mill is 50Hz, and the ball milling time is 20h, excluding downtime. Stop for 1 hour every 5 hours of ball milling to prevent the ...

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PUM

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Abstract

The invention discloses a method for manufacturing a dispersion strengthening copper-based oil bearing, and belongs to the field of dispersion strengthening materials. According to the method, copper powder, aluminum powder, tin powder, graphite powder and nanometer yttrium oxide powder are mixed according to a certain proportion and placed into a frequency conversion high-energy vibration ball mill for high-energy ball milling after dispersing agents are added, then powder obtained through ball milling is pressed on a pressing machine to form a bearing base body blank, the formed blank is sintered and then immersed in oil, and finally the dispersion strengthening copper-based oil bearing can be obtained through full shaping of a die. By the adoption of the method, the abrasive resistance and lubricating performance of the manufactured dispersion strengthening copper-based oil bearing are better than those of a common copper-based oil bearing.

Description

technical field [0001] The invention belongs to the technical field of preparation of dispersion-strengthened metal materials, and in particular provides a method for preparing dispersion-strengthened copper-based oil bearings. technical background [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. Moreover, traditional copper-based powder metallurgy oil-impregnated bearings are only suitable for small and medium loads and high speeds to achieve hydrodynamic lubrication. Shaft seized. [0003] Dispersion strengthening introduces stable, uniform, and fine oxide material points into the metal matrix, pins dislocations, grain boundaries, and subgrain boundaries, and hinders the movement of dislocations, thereby...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/16B22F1/00C22C9/02
Inventor 葛莲郭志猛罗骥曹慧钦
Owner JIANGDU LEADER POWDER METALLURGY
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