Influence of severe plastic deformation on the hardened layer characteristics of high-speed tool steel HSS M2

Abstract

This paper presents the results of a study of the effect of severe plastic deformation of tool steelHSS M2 on the surface hardness and depth of the hardened layer after nitriding in a glow dischargeplasma. For the experiments, two batches of samples were prepared, of which one batch underwentSPD processing, and the second did not undergo any preliminary processing. After the experiments,studies were carried out to measure the hardness along the depth of the hardened layer by the Vickersmethod. The research results are presented and analyzed. In the course of the analysis, it was foundthat the depth of the hardened layer depends on both the nitriding time and the initial structure of thesteel. In turn, the surface hardness changes insignificantly from an increase in the nitriding time andthe addition of preliminary SPD.