DIAGNOSIS OF QUALITY OF HARDENING OF BEARING RINGS USING THE PHENOMENON OF ELECTROMAGNETIC INDUCTION

Abstract

The inexpensive, simple and sufficiently accurate methodology and experimental setup for controlling the quality of hardening of steel products of cylindrical shape in real time, that is, at the time of leaving the finished products from the tempering process, has been developed and tested.

The influence of a certain degree of hardening of the bearing rings on the electromotive force of mutual induction in the measuring coil is investigated. The experimental results of values ​​of electromotive force of mutual induction for rings of different series were obtained.

According to the experimental data, the intervals of values ​​of electromotive force of mutual induction for qualitatively tempered rings of different series were determined. The technique of selection of qualitatively hardened bearing rings from a large number of them by known parameters for a certain series of samples is shown.