M50-based bearing self-lubricating material and preparation method thereof

A technology of self-lubricating materials and base bearings, applied in the direction of bearing components, shafts and bearings, metal material coating technology, etc., can solve the difficulties in adjusting the tribological properties of self-lubricating materials, and the difficulty in reconciling the self-lubricating properties and mechanical properties of self-lubricating materials and other problems, to achieve the effect of simple and novel preparation method, good lubricating effect and improved stability

Active Publication Date: 2020-07-10
XIAN TECHNOLOGICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the materials used in the above studies are all prepared by mechanically mixing and sintering the base material and the lubricant through powder metallurgy technology. The tribological properties of the prepared self-lubricating materials are also difficult to control

Method used

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  • M50-based bearing self-lubricating material and preparation method thereof
  • M50-based bearing self-lubricating material and preparation method thereof
  • M50-based bearing self-lubricating material and preparation method thereof

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preparation example Construction

[0032] In the following examples, the M50-based bearing self-lubricating material is based on M50 steel as the base material, with Sn-Ag-Cu as the lubricating phase, and carbon nanotubes (CNTs) as the reinforcing phase, using EDM microporous machining Micropores are arranged in an array on the surface of M50 bearing steel material, and Sn-Ag-Cu spherical powder containing CNTs is prepared by vacuum atomization method, and then Sn-Ag-Cu / CNTs spherical powder is filled on the surface by high temperature and high pressure infiltration technology In micropores, M50-based bearing self-lubricating materials are obtained. The present invention provides a specific preparation method, but does not limit its preparation method. Sn-Ag-Cu / CNTs spherical powder, surface microporous structure, and M50-based bearing self-lubricating materials prepared by other methods that meet the requirements of the present invention also belong to protection scope of the present invention.

[0033] The i...

Embodiment 1

[0039] Such as figure 1 As shown, a preparation method of M50-based bearing self-lubricating material, it uses EDM microporous machining technology to process and arrange micropores on the surface of M50 bearing steel material, and secondly, prepares Sn-Ag-Cu by vacuum atomization method / CNTs spherical powder, and then use the high temperature and high pressure infiltration technology to fill the Sn-Ag-Cu / CNTs spherical powder in the surface micropores to obtain a M50-based bearing self-lubricating material. Specific steps are as follows:

[0040] 1) Select M50 bearing steel material, and use EDM micro-hole machining technology to process micro-holes on the surface of M50. The diameter of the micro-holes is 200 μm, the depth of the micro-holes is 800 μm, and the distance between two adjacent micro-holes is equal, which is 700 μm;

[0041] The process parameters of EDM micro-hole machining are pulse width 600nS and pulse-to-pulse range 400nS;

[0042] 2) Select Sn, Ag, Cu, a...

Embodiment 2

[0047] A preparation method of M50-based bearing self-lubricating material, which is to use electric spark micro-hole machining technology to process and arrange micro-holes on the surface of M50 bearing steel material, and secondly, prepare Sn-Ag-Cu / CNTs spherical shape by vacuum atomization method powder, and then use the high temperature and high pressure infiltration technology to fill the Sn-Ag-Cu / CNTs spherical powder in the surface micropores to obtain the M50-based bearing self-lubricating material. Specific steps are as follows:

[0048] 1) Select M50 bearing steel material, and use EDM micro-hole machining technology to process micro-holes on the surface of M50. The diameter of the micro-holes is 250 μm, the depth of the micro-holes is 900 μm, and the distance between two adjacent micro-holes is equal, which is 850 μm;

[0049] The process parameters of EDM microhole machining are pulse width 750nS and pulse-to-pulse range 550nS;

[0050] 2) Select Sn, Ag, Cu, and C...

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Abstract

The invention relates to an M50-based bearing self-lubricating material and a preparation method thereof. The self-lubricating material mainly takes aviation main shaft bearing material M50 steel as abase material, Sn-Ag-Cu as a lubricating phase, and carbon nanotubes (CNTs) as a reinforcing phase, array micropores are distributed in the surface of the M50 steel, and the surface micropores are filled with Sn-Ag-Cu/CNTs to achieve the lubricating function. The preparation method comprises the following steps that the surface micropores of the M50 steel are prepared by adopting an ultra-preciseelectric spark micropore electro-machining technology; then, Sn-Ag-Cu spherical powder containing the CNTs is prepared through a vacuum atomization method; and finally, the Sn-Ag-Cu/CNTs spherical powder is directly infiltrated and formed in the surface micropores of the M50 steel through a high-temperature and high-pressure infiltration technology, and the M50-based bearing self-lubricating material is obtained. The M50-based bearing self-lubricating material has excellent antifriction and wear-resisting properties, the tribological property of an M50 steel material can be effectively improved, the preparation method is simple and convenient, and the preparation process is easy to control.

Description

technical field [0001] The invention relates to an M50-based bearing self-lubricating material and a preparation method thereof, belonging to the field of solid self-lubricating composite materials. Background technique [0002] M50 high-temperature bearing steel has many excellent characteristics such as high-temperature dimensional stability, high-temperature hardness, high-temperature contact fatigue performance, etc., and is the main steel used for main shaft bearings of aero-engines in various countries around the world. At present, the main development direction of aero-engines is high thrust-to-weight ratio, which makes the operating conditions of aero-bearings tend to be higher speed and heavy load. This will lead to more serious friction and wear problems of aeroengine main shaft bearings under high temperature conditions. Therefore, how to develop M50 aero main shaft bearings with excellent wear reduction and wear resistance has important engineering value. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10B22F9/08B23H1/00B23H9/14F16C33/10F16C33/66
CPCC23C24/103B22F9/082B23H1/00B23H9/14F16C33/1095F16C33/6696
Inventor 刘锡尧卢志伟闫斌张君安刘波王亚娟孙小亮
Owner XIAN TECHNOLOGICAL UNIV
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