THERMOCHEMICAL SURFACE ENGINEERING OF INDUSTRIAL STEELS: STRUCTURE, MICROHARDNESS, AND TRIBOLOGICAL PERFORMANCE

This study investigates the theoretical and technological foundations of thermochemical treatment processes for strengthening industrial steel components. The influence of thermochemical treatment on the formation of diffusion-strengthened surface layers, microstructural evolution, microhardness, and tribological performance was evaluated. Experimental results demonstrated the formation of dense diffusion layers with improved mechanical and operational properties. The maximum microhardness increased from 1800 MPa to 3060 MPa, while the friction coefficient decreased to 0.04–0.07 and wear resistance increased by up to 30%. The obtained findings confirm the effectiveness of thermochemical treatment as a promising surface engineering technology for enhancing the durability, reliability, and service life of industrial components operating under severe conditions.