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Metal matrix self-lubricating composite material and preparation method thereof

A technology of self-lubricating materials and composite materials, applied in the field of metal-based self-lubricating composite materials and their preparation, can solve unsatisfactory problems and achieve good lubrication and wear resistance

Inactive Publication Date: 2014-12-31
ZHEJIANG CHANGSHENG SLIDING BEARINGS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bearings disclosed in the above two patents have better lubrication and wear resistance, but are still not ideal

Method used

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  • Metal matrix self-lubricating composite material and preparation method thereof
  • Metal matrix self-lubricating composite material and preparation method thereof
  • Metal matrix self-lubricating composite material and preparation method thereof

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preparation example Construction

[0028] The present invention also provides a method for preparing a metal-based self-lubricating composite material, comprising the following steps:

[0029] a) Sintering copper alloy powder on the surface of the metal substrate to form a copper alloy layer on the surface of the metal substrate;

[0030] b) Scraping or dip-coating a self-lubricating material on the surface of the copper alloy layer, then vacuumizing to obtain a metal plate, and drying the metal plate;

[0031] c) repeat step b) multiple times;

[0032] d) Sintering the metal plate obtained in step c) to obtain a metal-based self-lubricating composite material.

[0033] According to the present invention, in the process of preparing the metal-based self-lubricating composite material, copper alloy powder is first sintered on the surface of the metal substrate to form a copper alloy layer on the surface of the metal substrate. Wherein, the metal substrate includes but not limited to carbon steel, stainless ste...

Embodiment 1

[0043] The 1.8mm cold-rolled carbon steel sheet provided by the company is used as the metal substrate, and the copper alloy powder with a particle size of 60-200 mesh is covered on one surface of the metal substrate. The copper alloy powder includes 10wt% tin, 10wt% lead and The remaining amount of copper; then the metal substrate is sintered in nine areas of the sintering furnace in sequence, the linear speed of the sintering is 260mm / min, the furnace temperature of the first to second areas of the sintering furnace is 750 ° C, and the third area to The furnace temperature in District 9 is 810°C. After the sintering is completed, a copper alloy layer is formed on the surface of the metal substrate, and the thickness of the copper alloy layer is 1.2±0.1mm;

[0044] Colloidal graphite, molybdenum disulfide and polytetrafluoroethylene are configured with 1000g of self-lubricating material according to the mass ratio of 0.25:1:3.5;

[0045] Use a scraper to scrape a layer of sel...

Embodiment 2

[0051] A 2mm cold-rolled carbon steel sheet is used as the metal substrate, and copper alloy powder with a particle size of 100 to 140 mesh is covered on one surface of the metal substrate, wherein the copper alloy powder includes 8wt% tin and the balance of copper; then the metal substrate Carry out sintering in nine areas of the sintering furnace in sequence, the linear speed of the sintering is 350mm / min, the furnace temperature of the first and second areas of the short plate furnace is 750°C, and the furnace temperature of the third area to the ninth area is 810°C , after the sintering is completed, a copper alloy layer is formed on the surface of the metal substrate, and the thickness of the copper alloy layer is 2.5mm;

[0052] Colloidal graphite, molybdenum disulfide and polytetrafluoroethylene are configured with 1000g of self-lubricating material according to the mass ratio of 0.25:1:3.5;

[0053] Use a scraper to scrape a layer of self-lubricating material on the su...

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Abstract

The invention provides a metal matrix self-lubricating composite material and a preparation method thereof. The metal matrix self-lubricating composite material comprises a metal matrix body and a mixing layer, wherein the mixing layer is compounded at the surface of the metal matrix body, and comprises copper alloy and self-lubricating material. The invention also provides the preparation method of the metal matrix self-lubricating composite material. The method comprises the following steps of (a) sintering copper alloy powder at the surface of the metal matrix body, and forming a copper alloy layer at the surface of the metal matrix body; (b) scraping or immersing a lubricating material at the surface of the copper alloy layer, sucking vacuum, obtaining a metal plate, and drying the metal plate; (c) repeating the step (b) for multiple times; (d) sintering the metal plate obtained in step (c), so as to obtain the metal matrix self-lubricating composite material. The metal matrix self-lubricating composite material and the method have the advantage that by adopting the vacuum suction method, the vacuum suction is repeated, so the dense surface of the metal matrix body is formed, the self-lubricating material is dispersed and distributed on the mixing layer of the copper alloy, and the lubricating property and the abrasion-resistant property of the metal matrix self-lubricating composite material are better.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a metal-based self-lubricating composite material and a preparation method thereof. Background technique [0002] Sliding bearings are bearings that work under sliding friction. For high-speed, heavy-duty, high-precision and structurally split occasions, sliding bearings are required. At present, sliding bearings made of steel-copper alloy laminated composite materials are mostly used. This type of bearing has large bearing capacity, good wear resistance and low cost of use. However, the sliding bearing must be fully lubricated during use, and the additional lubricant added at the beginning of use cannot fully enter the friction surface, and the lubrication is insufficient, resulting in early wear or "biting the shaft". In view of the shortcomings of steel-copper alloy composite sliding bearings, researchers have developed a new type of sliding bearing material, tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F7/04
Inventor 孙志华陆忠泉
Owner ZHEJIANG CHANGSHENG SLIDING BEARINGS
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