Analysis of hypothesis about the reasons of the calling upgrades of the durability of the tool from fast-cutting steel as a result of the exposure of the magnetic field

Abstract

Kindenko N. I. Analysis of hypothesis about the reasons of the calling upgrades of the durability of the tool from fast-cutting steel as a result of the exposure of the magnetic field // Herald of the DSEA. – 2019. – № 2 (46). – P. 83–88.

The present work is devoted to the analysis of hypotheses about the causes of the increase in durability of an instrument made from high-speed steels as a result of a magnetic field. It is shown that a prerequisite for increasing the durability of the cutting tool is the presence in the cutting zone of a magnetic field of various strengths or processing with a tool that has been previously hardened with a magnetic field. The established relationship between the wear resistance and the operational reliability of the axial tool, on the one hand, and the main quality characteristics, on the other hand, shows that the technology of processing parts with a magnetically machined tool can significantly increase the service life of the tool and the operational reliability of parts. It is noted that magnetic pulse treatment is a combination of electromagnetic and thermodynamic methods of controlling the non-equilibrium structure of a substance. It is shown that the effectiveness of the magnetic treatment method depends on a number of factors. It is noted that the primary cause of improving the performance of a tool subjected to magnetic treatment is a change in the properties of the tool material, which occurs due to the magnetostriction hardening of high-speed steel. It has been established that in order to sustain the magnetic effect of the tool and increase the tool life of high-speed steel when applying a magnetic field to the cutting zone, it is necessary to take into account the value of the magnetic field strength, the direction of the magnetic flux and the cutting conditions in each case.