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Environment-friendly lead-free copper-based self-lubricating material and preparation process thereof

A self-lubricating material, lead-free copper-based technology, used in manufacturing tools, metal rolling, metal rolling, etc., can solve the problems affecting the bonding strength of the alloy layer and the steel back, and the easy oxidation of aluminum, and achieve a simple and easy production process. The effect of controlling, combining good and good mechanical properties

Inactive Publication Date: 2011-11-02
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Both aluminum and lead have a face-centered cubic structure and have good plastic deformation ability. Researchers at home and abroad have tried to use aluminum instead of lead to produce new copper-based self-lubricating materials. Aluminum is easy to oxidize during the sintering process, and aluminum oxide is easily formed between the self-lubricating material and the steel back, which seriously affects the bonding strength of the alloy layer and the steel back. At present, there is no systematic report on the successful development

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Lead-free environmental protection self-lubricating bearing material

[0038] The self-lubricating bearing material is composed of: the composition of copper alloy powder is atomized CuSn8Ni1, the particle size is -200 mesh, the particle size of Al powder is -200 mesh, and the mass ratio is: 94% atomized CuSn8Ni1 powder, 6% electrolytic aluminum powder.

[0039] The manufacturing process is as follows:

[0040] Each component is mixed evenly according to the ratio and then mixed evenly with a three-dimensional mixer; the steel back is processed into a steel back with a thickness of 2.5mm No. 45 steel plate, copper-plated, and the thickness of the coating is 8 μm. On the steel back, the thickness of the alloy powder is 8mm; the loose packing and pressure sintering process is as follows: rapid heating to 850, heat preservation for 45 minutes, hydrogen protection, and then water cooling to room temperature; Make the thickness of the alloy layer 4.5mm; then re-burn at 830°...

Embodiment 2

[0044] Lead-free environmental protection self-lubricating bearing material

[0045] The self-lubricating bearing material is composed of: the composition of copper alloy powder is atomized CuSn8Ni1, the particle size is -200 mesh, the particle size of Al powder is -200 mesh, and the mass ratio is: 96% atomized CuSn8Ni1 powder, 4% electrolytic aluminum powder.

[0046] The manufacturing process is as follows:

[0047] Each component is mixed evenly according to the ratio and mixed evenly with a three-dimensional mixer; the steel back is processed into a steel back with a thickness of 2.5mm No. 45 steel plate, copper-plated, and the thickness of the coating is 15μm. On the steel back, the thickness of the alloy powder is 8mm; the loose packing and pressure sintering process is as follows: rapid heating to 850°C, heat preservation for 45min, hydrogen protection, and then water cooling to room temperature; Roll to make the thickness of the alloy layer 4.5mm; then re-burn at 830°...

Embodiment 3

[0050] Lead-free environmental protection self-lubricating bearing material

[0051] The self-lubricating bearing material is composed of: the composition of copper alloy powder is atomized CuSn8Ni1, the particle size is -200 mesh, the particle size of Al powder is -200 mesh, and the mass ratio is: 90% atomized CuSn8Ni1 powder, 10% aluminum.

[0052] The manufacturing process is as follows:

[0053]The components are mixed evenly according to the ratio and mixed evenly with a three-dimensional mixer; the 45th steel plate with a thickness of 2.5mm is used to process it into a steel back, copper-plated, and the thickness of the coating is 12μm. On the steel back, the thickness of the alloy powder is 8mm; the loose packing and pressure sintering process is as follows: rapid heating to 840°C, heat preservation for 30min, hydrogen protection, and then water cooling to room temperature; initial rolling on an irreversible two-roll cold rolling mill, preliminary Roll to make the thic...

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Abstract

The invention discloses an environment-friendly lead-free copper-based self-lubricating material and a preparation process thereof. The component of copper alloy powder is atomized CuSn8Nil, the granularity of the atomized CuSn8Nil is 200 meshes, and the granularity of Al powder is 200 meshes; and the copper alloy powder comprises the following components in percentage by mass: 90 to 96 percent of atomized CuSn8Nil, and 4 to 10 percent of aluminum. The preparation process comprises the following steps of: (1) mixing, (2) making a supporting steel back, (3) spreading powder, (4) loosening and sintering, (5) blooming, (6) re-sintering, (7) re-rolling, and (8) annealing and finish rolling. The invention discloses the environment-friendly lead-free copper-based self-lubricating material with good bonding performance and good friction and abrasion resistance and the preparation process thereof.

Description

technical field [0001] The invention belongs to a new type of copper-based self-lubricating material and a preparation method thereof, in particular to a new type of material that uses Al to replace Pb in traditional copper-based self-lubricating materials and its preparation process, and belongs to the technical field of metallurgical material preparation . Background technique [0002] The steel-copper bimetal anti-friction material not only endows the material with good anti-friction performance and good anti-seizure property, but also has high strength and hardness, enhances the wear resistance of the material, and can better meet the requirements of modern engine bearings . [0003] Existing bronze-based self-lubricating materials for automobile bearings often contain a large amount of lead, such as CuPb10Sn10, CuPb24Sn, cuPb23sn3) and the like. Due to the high toxicity of Pb and its compounds, developed countries have introduced many relevant laws and regulations to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F7/08B22F1/00B21B37/00
Inventor 姚萍屏丁莉赵林
Owner CENT SOUTH UNIV
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