Multilayered self-lubricating material with high porosity and preparation method thereof

A self-lubricating material and multi-layer composite technology, which is applied in chemical instruments and methods, metal material coating technology, coating, etc., can solve the problem of the decrease of the bonding performance between metal alloy powder and metal plate, and the inability to obtain self-lubricating properties and durability Grinding performance, alloy layer bearing capacity decline and other problems, to achieve good dimensional stability, promote adhesion, reduce the effect of friction temperature

Active Publication Date: 2006-12-27
COB PRECISION PARTS
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] However, the disadvantage of the above-mentioned inventions is that the higher porosity will lead to a decrease in the bonding performance of the metal alloy powder and the metal plate, thereby resulting in a decrease in the bearing capacity of the alloy layer
At the same time, because part of the pores are closed pores, they are not completely exposed on the surface of the alloy layer, resulting in the inability of the surface polymer to penetrate
In addition, since the main lubricant is a paste with PTFE emulsion as the main body, the water in the paste enters the pores. Although the water will evaporate after drying, the viscoelastic polymer material is not easy to completely embed in the pores. In this way, excellent self-lubricating and wear-resistant properties cannot be obtained, and the mechanical properties of the material show a downward trend

Method used

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  • Multilayered self-lubricating material with high porosity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Copper alloy powder is sintered on the surface of copper-plated mild steel (thickness 2.1mm). The tin content in the copper alloy powder is 12wt%, the zinc content is 3wt%, and the lead content is 3wt%. The above-mentioned copper alloy powder is uniform Spread on copper-plated low-carbon steel, ensure that the thickness of the powder is 0.35mm, and sinter it at 900°C for 10 minutes under the protection of ammonia decomposition gas. After the furnace is released, ensure that the copper powder and the copper-plated steel have good bonding strength.

[0018] According to the following surface lubricating material (polymer material), implement the ratio in the first column of the formula table and mix the components in a mechanical mixer to ensure the uniformity of the mixture. Then it is put into an oven, and the mixture is dried at 200°C to remove moisture from the mixture. Put the dewatered mixture into a cone or double cone mixer for mixing, and add 1 / 5 volume ratio of No. ...

Embodiment 2

[0020] Copper alloy powder is sintered on the surface of copper-plated mild steel (thickness 2.1mm). The tin content in the copper alloy powder is 8wt% and the zinc content is 5wt%. The above-mentioned copper alloy powder is evenly spread on the copper-plated low On the carbon steel plate, ensure that the powder thickness is 0.35mm. 3 Sintered at 910℃ for 15min under the protection of decomposing atmosphere. After being out of the furnace, it is ensured that the copper powder and the copper-plated steel plate have good bonding strength.

[0021] The following surface lubricating material (polymer material) implements the proportioning in the second column of the formula table and mixes the components in a mechanical stirrer. The specific process is the same as that of Example 1.

Embodiment 3

[0023] Copper alloy powder is sintered on the surface of copper-plated mild steel (thickness 2.1mm). The tin content in the copper alloy powder is 10wt% and the lead content is 5wt%. The above-mentioned copper alloy powder is evenly spread on the copper-plated low-carbon steel. On the carbon steel plate, ensure that the powder thickness is 0.35mm. 3 Sintering at 860℃ for 20min under the protection of decomposing atmosphere. After the furnace is discharged, it is ensured that the copper powder and the copper-plated steel plate have good bonding strength.

[0024] The following surface lubricating material (polymer material) implements the formulation in the third column of the formula table and mixes the components in a mechanical stirrer. The specific process is the same as in Example 1.

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Abstract

The invention relates to a multilayer composite self-lubricant material with high porous degree, wherein the invention uses low-carbon steel sheet as base material; plates copper on the surface; sinters copper alloy powder on the surface of liner layer; and coats sintered polymer on the surface to be rolled and adjusted with thickness. The tin content of copper alloy powder is 1-15%; the optimized valve is 8-12%; the zinc content is 0-6%; the lead content is 0-6%; the optimized valve is 3-5%. The invention has high mechanical property, which can keep the load ability and mechanical strength of liner metallic material, better self-lubricant and anti-abrasion property, with high producing efficiency and low cost.

Description

Technical field [0001] The invention relates to a self-lubricating material and a preparation method thereof, in particular to a multi-layer composite self-lubricating material with high porosity and a preparation method thereof. Background technique [0002] The compressor needs reliable and stable lubrication when working. When the compressor lacks lubricant or the lubrication is unreasonable, serious abnormal noise will be produced inside the compressor, and in severe cases, it will cause the wear and tear of the compressor components. In order to ensure the stability of the moving parts of the compressor, it is necessary to cut or grind the surface of the self-lubricating bearing to prevent the compressor from generating excessive noise due to excessive clearance due to bearing wear. Since the bearings are mainly operated for a long time under boundary lubrication conditions and oil shortage or low oil supply, it is very important to develop sliding bearings with good self-lu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C33/20C23C28/00B32B15/08B32B5/22
Inventor 张国强王宏刚简令奇杨生荣
Owner COB PRECISION PARTS
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