DOI: 10.22184/2499-9407.2026.42.1.62.64
The results of studies are presented, showing a close relationship between the boronized layers ductility and their phase composition, structure, chipping stresses, and compressive stress levels, which are determined by the saturation methods used and boron concentration on the treated surface. At the same time, recommendations have been developed for selecting tool materials when performing finishing operations on boronized parts: turning (milling), grinding, and lapping. Good machinability of boronized parts indicates their maintainability, for example, boronized bodies of freight car automatic couplers.