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Steel bearing ring and preparation method thereof

A bearing ring and steel technology, applied in the field of steel bearing rings and their preparation, can solve problems such as time-consuming, inability to achieve effective connection, uneven deformation, etc., to ensure service safety, improve precision retention and The effect of resistance to deformation

Pending Publication Date: 2022-04-12
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the independent surface strengthening process is not widely used, the above residual stress control method often makes it impossible to effectively connect the heat treatment and cold working processes, and there are disadvantages such as uneven deformation and time-consuming, and the effect of implementing it in the factory is not good.

Method used

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  • Steel bearing ring and preparation method thereof
  • Steel bearing ring and preparation method thereof
  • Steel bearing ring and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] M50 steel lathe is used to obtain the semi-inner ring blank of the No. 1 bearing, and the blank is quenched at a temperature of 1110 °C, and the holding time is 30 minutes. After 15 minutes, it is cooled to below 100 °C; after quenching, deep cooling is carried out. The cold temperature is -68°C, and the duration is 1h; the deep-cooled blank is treated with three tempering processes. After tempering, carry out cryogenic cooling, the cryogenic temperature is -68°C, and the duration is 1h. After three times of tempering, the volume content of retained austenite is 0.9%; The tempering stabilization treatment was carried out respectively, among which the tempering stabilization temperature after rough grinding was 550°C and the time was 1h, and the tempering stabilization temperature after fine grinding was 140°C and the time was 4h; finally, the channel final grinding and fine grinding were carried out. The feed speed of the final grinding wheel is 0.002mm / s, the type of g...

Embodiment 2

[0053] M50 steel lathe is used to process the blank of the No. 2 bearing semi-inner ring, and the blank is quenched. The quenching temperature is 1075 ° C, the holding time is 40 minutes, and it is cooled to below 100 ° C after 13 minutes; the cryogenic temperature after quenching is -75 ℃, the duration is 2.5h; three tempering processes are used to treat the cryogenic blank. The temperature and time of the three temperings are the same. The post-cryogenic temperature is -75°C, the duration is 2.5h, and the volume content of retained austenite is 0.8% after three times of tempering; rough grinding and fine grinding are carried out on the obtained rough, wherein, the rough grinding and fine grinding are respectively tempered Fire stabilization treatment, in which the tempering stabilization temperature is 525 ° C for 2.5 hours after rough grinding, and the tempering stabilization temperature is 250 ° C for 4 hours after fine grinding; finally, the channel final grinding and fine...

Embodiment 3

[0055] The semi-inner ring blank of the No. 3 bearing was processed by M50 steel lathe, and the blank was quenched. The quenching temperature was 1110°C, and the holding time was 35min. After 14min, it was cooled to below 100°C; after quenching, the cryogenic temperature was - 70°C, the duration is 70min; three tempering processes are used to treat the cryogenic blank, and the temperature and time of the three temperings are the same. The cryogenic temperature is -70°C, the duration is 70min, and the volume content of retained austenite is 1.4% after three times of tempering; rough grinding and fine grinding are carried out on the obtained blank, among which, tempering is carried out after the rough grinding and fine grinding to stabilize After rough grinding, the stable tempering temperature is 520°C and the time is 2.5h; after fine grinding, the tempering temperature is 135°C and the time is 4h; finally, the channel final grinding and fine grinding are carried out, and the ch...

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Abstract

The invention relates to a steel bearing ring and a preparation method thereof. The preparation method comprises the following steps: 1) carrying out quenching treatment and subzero treatment on a steel bearing ring blank; (2) the steel bearing ring blank obtained in the step (1) is subjected to multiple times of tempering, and subzero treatment is conducted after the first time of tempering, so that the volume content of retained austenite of the obtained steel bearing ring blank is within 2%; (3) grinding treatment is conducted on the steel bearing ring blank obtained in the step (2), grinding treatment comprises rough grinding and accurate grinding, tempering stabilization treatment is conducted after rough grinding and accurate grinding, and the tempering stabilization temperature after rough grinding is higher than that after accurate grinding; 4, the steel bearing ring blank obtained in the step 3 is subjected to channel final grinding and channel fine grinding treatment.The method achieves effective control over the surface layer residual stress and the internal residual stress while the bearing ring is machined, the precision retentivity and the deformation resistance of a bearing in the service process are greatly improved, and therefore the service life of the bearing is stably prolonged.

Description

technical field [0001] The invention relates to the field of steel bearing preparation, in particular to a steel bearing ring and a preparation method thereof. Background technique [0002] Due to its high wear resistance, strength and high temperature stability, M50 bearing steel is widely used to prepare bearing rings used in aviation, aerospace, marine engineering and other fields. A typical failure mode during bearing service is poor accuracy retention and micro-deformation due to excessive residual tensile stress, which exceeds the yield strength of the material. When the plastic deformation continues to accumulate, the bearing working surface is severely worn and fails. Therefore, in order to maintain the accuracy of the bearing and slow down the occurrence of micro-deformation, it is necessary to control the residual stress of the bearing, that is, to adopt the method of internal and external combination, which not only reduces the body residual tensile stress of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B1/00B24B5/36B24B19/06C21D9/40C21D1/18C21D6/04
CPCY02P10/20
Inventor 曹艳飞刘宏伟李殿中刘航航杜宁宇类承帅赵志坡李依依
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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