Magnetic Abrasive Machining of Hard Workpieces by New Diffusion-Alloyed Materials

Abstract: New ferromagnetic abrasives are developed for use in finishing, so as to increase the productivity. Diffusional boriding of sprayed iron powder ensures high surface hardness of the powder particles, without loss of magnetic properties at the core. In comparison with sintered ferromagnetic powder, such powder particles have significantly greater cutting area. The productivity of magnetic abrasive machining when using diffusionally borided powders of different particle size is investigated in comparison with sintered Fe–TiC powder. The surface roughness of parts with nickel-based sprayed coatings that may be produced in machining by diffusionally borided powder is Ra = 0.22 µm. Experiments indicate higher productivity in magnetic abrasive machining when using diffusionally borided powders in comparison with sintered Fe–TiC powder. These results are tested industrially in finishing the components of hydraulic equipment. © 2023, Allerton Press, Inc.