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Heat treatment technology of thin-wall bearing ring

A technology of thin-walled bearings and rings, which is applied in the field of bearing processing, can solve the problems of product deformation size that cannot meet the technical requirements, outer diameter deformation, etc., and achieve the effect of reducing residual stress and grinding stress

Inactive Publication Date: 2021-08-20
中浙高铁轴承有限公司 +1
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the processing of thin-walled bearing rings, in the fine grinding process, the deformation of the outer diameter of the ring meets the technical requirements after fine grinding, but the outer diameter deformation occurs during the grinding of the raceway, and the deformation size of the product cannot meet technical requirements

Method used

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  • Heat treatment technology of thin-wall bearing ring
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Embodiment Construction

[0007] The present invention will be further described below in conjunction with specific examples.

[0008] The heat treatment process for a thin-walled bearing ring includes:

[0009] 1. Stress relief annealing for forging and turning: the annealing temperature is 620-660°C, and the holding time is 6-8 hours.

[0010] 2. Heat treatment and tempering process: the first tempering temperature is 160-180°C, the holding time is 3-4h; the second tempering temperature is 190-210°C, and the holding time is 3-4h.

[0011] 3. Additional tempering process for removal of grinding: the first additional tempering temperature is 140-160°C, holding time 3-4h; the second additional tempering temperature is 140-160°C, holding time: 3-4h.

[0012] According to the above technical scheme, 50 pieces of thin-walled bearing rings were processed, and the test data showed that the deformation of the bearing rings after final grinding met the technical requirements.

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Abstract

The invention relates to a heat treatment technology of a thin-wall bearing ring. According to the technology, the annealing temperature in forging and turning stress relief annealing processes is controlled; in the heat treatment tempering process, secondary tempering is carried out; and in an additional tempering process of removing grinding stress, secondary additional tempering is carried out. According to the heat treatment technology, stress relief annealing is added, and forging is reduced, so that the residual stress in the turning process is reduced; the tempering frequency is increased, so that the residual stress in the heat treatment process is reduced; and the additional tempering frequency is increased, so that the grinding stress in the grinding process is reduced. Therefore, the problem of deformation of the thin-wall bearing ring caused by release of the residual stress in the grinding process is solved.

Description

technical field [0001] The invention relates to a heat treatment process for a thin-walled bearing ring, belonging to the technical field of bearing processing. Background technique [0002] At present, in the process of processing thin-walled bearing rings, in the fine grinding process, the deformation of the outer diameter of the ring meets the technical requirements after fine grinding, while the outer diameter deformation occurs during the grinding of the raceway, and the deformation size of the product cannot Meet technical requirements. Contents of the invention [0003] The purpose of the present invention is to provide a heat treatment process for a thin-walled bearing ring that can solve the deformation of the raceway and the outer diameter during the fine grinding process. [0004] The technical solution adopted by the present invention is: a heat treatment process for thin-walled bearing rings, which is characterized in that it includes: (1) the annealing tempe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/40C21D1/30C21D1/18
CPCC21D9/40C21D1/30C21D1/18
Inventor 李军何惜港叶炎光邱法增吕钟毓张佩思李景阳王学峰胡畅郑小宝邓继溪
Owner 中浙高铁轴承有限公司
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