Authors: A.N. Korotkov, L.P. Korotkova, R.V. Solentsov, N.V. Shakirov

Title of the article: Research of the quality of steels of rolling bearings by different manufacturers used in mining equipment

Year: 2020, Issue: 4, Pages: 9-15

Branch of knowledge: 05.02.07 Technology and equipment for mechanical and physical-technical processing

Index UDK: 621.78.015

DOI: 10.26730/1816-4528-2020-4-9-15

Abstract: Rolling bearings in mining equipment are characterized by large dimensions and severe operating conditions. When analyzing the causes of their premature failure, it is necessary to take into account several factors associated with improper operation, assembly of the structure, as well as the poor quality of bearing steels and their heat treatment. The presence of defects in the microstructure leads to various types of destruction of bearings: their splitting, chipping and gouging of the surface, pseudo brinelling, brinelling, abrasive wear. However, the quality of the metal of the bearings as delivered is generally not controlled.
The work investigated the quality of bearing steels on bearings of Russian, Swedish (SKF) and Japanese (NSK) production. These manufacturers are the main suppliers of rolling bearings for the Russian mining industry. The problem of quality control of bearing steels was solved in a complex manner. A quality control technique was developed, which took into account the state of the metal after metallurgical processing and at the stage of bearing production. The approbation of this technique was carried out, the main types of defects in bearing steels, which affect the mechanism of types of destruction of bearing steels, were identified.
As a result, this work shows that the quality of bearing steels of domestic manufacturers is not inferior to foreign counterparts, that is, bearings of a Russian manufacturer are competitive. A non-destructive testing method is proposed for detecting possible microstructure defects in bearings both in the state of delivery and during their operation.

Key words: rolling bearings mining bearing steel quality microstructure quality control performance competitiveness

Receiving date: 24.07.2020

Publication date: 04.10.2020

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