Increasing durability of bearings by the application of technological operations on the basis of cyclic elastic deformation of the rings

International Conference "Modern Technologies and Materials of New Generations"

Korolev, A.V.^1 ; Korolev, A.A.^1 ; Balaev, A.F.^1 ; Yakovishin, A.S.^1 ; Korolev, A.A.^1

Yuri Gagarin State Technical University of Saratov, 77 Politechnicheskaya str., Saratov

410054, Russia^1

关键词: Average values;    Bearing rings;    Fatigue microcracks;    High cycle;    Key feature;    Relaxation of residual stress;    Technological operations;    Thermal tempering;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/286/1/012002/pdf
DOI  :  10.1088/1757-899X/286/1/012002

来源: IOP

【 摘 要 】

The appearance and growth of fatigue microcracks during the relaxation of residual stresses under the action of high-cycle loads is one of the main reasons of decreasing of durability of products. To reduce residual stress of the bearing rings, there was developed a technology on the basis of the cyclic elastic deformation instead of using energy-consuming thermal tempering. The technology consists of continuous running of the rings between three rollers under the load. A key feature of the technology is the controllability of cyclic loading of parts. The conducted study of an experimental batch of rings proved the reduction of residual stresses by more than 2 times in comparison with the average value of residual stresses after thermal tempering.