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Method for Improving Wear Resistance of Bearing and Bearing

A wear-resistant performance and bearing technology, which is applied in the field of vacuum coating, can solve the problems of oxidative deterioration of lubricating grease, adverse effects of lubrication system, and the need to further enhance the wear-resistant performance of bearings.

Active Publication Date: 2019-11-22
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during long-term operation, the lubricating grease will oxidize and deteriorate, which will adversely affect the lubrication system.
[0003] Therefore, the current research on enhancing the wear resistance of bearings still needs to be further studied.

Method used

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  • Method for Improving Wear Resistance of Bearing and Bearing
  • Method for Improving Wear Resistance of Bearing and Bearing
  • Method for Improving Wear Resistance of Bearing and Bearing

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Example 1: In-situ nitriding treatment on the GCr15 bearing substrate to prepare a diamond-like coating to strengthen the wear resistance of the bearing

[0040] (1) The bearing base is first pre-cleaned with petroleum ether and alcohol, and put into a drying oven for drying.

[0041] (2) After the bearing matrix is ​​placed in the cavity of the PECVD equipment, the cavity is vacuumed up to 1x10 -4 Below Pa, perform chamber plasma cleaning: the cleaning conditions are: argon protection and control at 10Pa, bias voltage 800V, conduction ratio 0.6, cleaning for 30 minutes.

[0042] (3) In-situ nitriding of the bearing substrate: PECVD equipment is used to provide a pulse bias voltage setting of -1000V, a conduction ratio of 0.8, and a frequency of 80Hz; nitrogen gas of 10Pa; nitriding for 100 minutes.

[0043] (4) Surface diamond-like deposition: use PECVD equipment, bias -1000V, conduction ratio 0.8, feed methane 20Pa, deposit coating for 150 minutes.

[0044] Through ...

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Abstract

The invention provides a method for improving the wear resistance of a bearing and the bearing. The method comprises the steps: conducting nitriding treatment for the surface of a bearing matrix; forming a diamond-like coating on the surface of the bearing matrix after nitriding treatment. Through an ion bombardment effect on nitriding treatment, the surface lattice of the bearing matrix can distort, the surface hardness is increased, and mechanical properties and corrosion resistance are significant. The diamond-like coating can effectively perform good mechanical properties and a lubrication and friction reducing effect. The method combines the process and performance advantages of nitriding treatment and the diamond-like coating and prepares the high-efficient wear-resisting coating. The wear resistance of the bearing is obviously improved, and the service life of the bearing is prolonged.

Description

technical field [0001] The invention relates to the technical field of vacuum coating, in particular to a method for improving the wear resistance of a bearing and the bearing. Background technique [0002] Sliding bearings and rolling bearings have been widely used in construction machinery and aerospace fields. The inner bore of the bearing and the rotating shaft do not come into direct contact under sufficient lubrication conditions. However, under oil-lean or heavy-load conditions, the friction and wear between bearing components will increase sharply, which in turn will lead to a rapid reduction in bearing life. In order to improve the wear-resistant life of bearings, researchers have made a lot of attempts by adding wear-resistant additives to lubricating greases and have achieved varying degrees of improvement. However, during long-term operation, the lubricating grease will oxidize and deteriorate, which will adversely affect the lubrication system. [0003] Theref...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/26C23C8/02C23C16/26C23C28/04
CPCC23C8/02C23C8/26C23C16/26C23C28/046F16C2206/04F16C2223/14F16C2223/60F16C2235/00
Inventor 何永勇赵军王永富雒建斌王伟
Owner TSINGHUA UNIV
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