Surface treating method for enhancing abrasive resistance and fatigue life of bearing

A fatigue life and surface treatment technology, applied in the field of bearings, can solve the problems of low hardness and easy wear, and achieve the effect of improved wear resistance and stable size

Inactive Publication Date: 2008-11-19
C&U CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the hardness of the bearing treated by the above technology can only be increased by 2 to 3HRC compared with the hardness after ordinary heat treatment. Compared with the foreign impurities entering the bearing, its hardness is very low, so it is also prone to wear

Method used

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  • Surface treating method for enhancing abrasive resistance and fatigue life of bearing
  • Surface treating method for enhancing abrasive resistance and fatigue life of bearing

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Embodiment Construction

[0016] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0017] The present invention is realized through the following steps:

[0018] Clean the bearing ring parts, place them in a vapor deposition device, and put them in a vacuum state, and then pass them into nitrogen and argon for protection; the vapor deposition device is PECVD-L produced by Shenyang Scientific Instrument Development Center of the Chinese Academy of Sciences. The vapor deposition of this equipment can make the film-forming temperature low, the speed fast, and the film-forming quality is good;

[0019] Using the physical vapor deposition method, titanium and graphite are used as target materials, and kept for 0.5-4 hours to form a diamond-like film on the ferrule parts, with a deposition thickness of 500-1000 nanometers.

[0020] The ferrule parts are on the bearing outer ring deposition site 1 and the bearing inner ring depositi...

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Abstract

The invention relates to a surface treatment method for improving the abrasion resistance and the fatigue life of a bearing, which is realized through the following steps: a bearing ring part is washed clean and placed into a vapor phase deposition device and is in the vacuum state, and then nitrogen and argon enter into the vapor phase deposition device for protection; and a diamond-like film is formed on the ring part by taking titanium and graphite as target materials to maintain for 0.5 to 4 hours by the physical vapor deposition method, and the deposition depth is between 500 and 1000 nanometers. The method has the advantages that: the dimension of the ring part is stable; the surface hardness of the bearing reaches over HV2500; the dry friction coefficient is reduced to between 0.1 and 0.2; the abrasion resistance is improved by 200 percent; and the fatigue life of the bearing is over 4 times of that of a general heat treatment bearing after an experiment of intensify lifespan.

Description

technical field [0001] The invention relates to a bearing, in particular to a surface treatment method of the bearing. Background technique [0002] After normal heat treatment of traditional bearing ring parts, raceway surface wear failure and fatigue failure often occur in actual use. After the conventional heat treatment of the bearing ring, the hardness of the surface and the core is basically the same, about 60~65HRC. Since the carbon content of the bearing steel (GCr15) is relatively high, it is difficult to increase the hardness (greater than 65HRC) by surface heat treatment. It is generally believed that The failure mechanism of the bearing is: [0003] After the bearing surface is subjected to huge alternating stress, cracks will initiate on the surface or sub-surface of the bearing raceway, then expand, and eventually peel off; [0004] In addition, when the hardness of the friction pair is low, or in a dry friction state, wear will occur between the bearing race...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/06C23C14/22
Inventor 刘斌郭长建马双梁
Owner C&U CO LTD
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