## 3 Results  
Experimentally Determining the Thickness of the Hardened Layer and the Surface Hardness after MPT for Products of Bearing Steel Cr15  
The average value of microhardness for samples before treatment was 2.4 GPa. The presented dependences analysis shows that the processed samples' microhardness increased by 40-50%. The depth of the hardened layer is 80-100 \(\upmu\)m [40]. Within the new technology of magnetic pulse hardening, the magnetic-pulse effect of a substance changes its physical and mechanical properties. The interaction of a pulsed magnetic field with the conductive material's workpiece is effective at higher degrees of structural and energetic heterogeneity. Therefore, a higher surface and internal stress concentration in metal parts indicates a greater probability of a local concentration of the external field's microwires. This effect leads to heating areas around the crystals of tense blocks inhomogeneities of the metal structure. A higher thermal flux gradient with magnetic-pulse treatment indicates that the metal's structure is less homogeneous. After processing, the alloy's microstructure is improved, leading to a change in the material's physical and mechanical characteristics. Experimentally Studying the Effects of MPT on the Reliability of Cutting Tools of Hard Alloy WC85 TiC6 Co9  
The MPT impact on the stability of the cutting properties of inserts from hard alloys (e.g., WC85 TiC6 Co9) during rough turning was assessed. The change in microhardness before and after treatment was analyzed. Based on the analysis of microhardness distribution on the hard alloy surface, it was found that MPT increases on average from 16.1 GPa to 16.9 GPa. The variation coefficient of the microhardness decreases from 0.13 to 0.06. At the initial state and after processing, X-ray analysis was used as the research method. It is the most effective method for determining the structural characteristics of multi-phase crystalline solids [19]. The change in lattice parameters of Co and TiC after treatment shows that the lines (100) Co and (220) TiC shift toward larger angles. This fact indicates a decrease in lattice parameter distortions, confirms the cobalt phase WC85 TiC6 Co9 carbide deformation, and indicates improved hard alloy strength [41]. When machining hard alloys, the influence of the PMF on the structure and properties of the components was studied. It is known that the binder phase largely determines the strength of hard alloys. Surveillance of the cracks showed that destructive cracks spread in alloys of WC92 Co8 and the WC85 TiC6 Co9, mainly in the cobalt phase. In WC85 TiC6 Co9 alloys, the destructive crack mainly spreads by phase (Ti,W)C, the cobalt component can inhibit the destructive crack. This is explained by the fact that the cobalt phase of hard alloys is a solid solution of W and C in cubic Co.  
An orderly arrangement of atoms has lower internal energy than a disorderly arrangement, mainly if the atoms distribution in the crystal lattice occurs at relatively low temperature when the entropy associated with the disorder plays a less significant role. Changes in the cobalt phase's properties after the MPT are reduced to atoms' rearrangement under a magnetic field's influence. As regards the energy required for the recrystallization or separation of the dispersed phase, a higher energy magnetic field creates the MPT effect. This treatment does not influence the phase composition and texture of the material. However, the selection phase, crystallization, or stress can develop in addition to crystallographic directions such that the energy of crystallization or separation will be minimal in a specific direction depending on the magnetic field direction. An increase in the hard alloy's cutting properties' stability is associated with cobalt phase homogenization under a pulsed magnetic field. The application of vibro-abrasive treatment before exposure to the magnetic field enhances the intensity of the transition stresses in the cobalt phase from tensile to compressive.