Improving the operational properties of machine parts and tools is an urgent task for modern enterprises. To solve this problem, diffusion coatings based on transition metals of groups IV–VI of the periodic table, obtained by chemical-thermal treatment methods, are widely used. The work conducted a literature review on the relevance and feasibility of using diffusion coatings on structural and tool materials. As a result of the experimental study, the saturation of steel AISI W108 with carbide-forming elements was carried out in a specially designed hermetic chamber. The technological parameters of the coating application were selected experimentally. It was established that the optimal saturation time for obtaining coatings based on Ti, Cr, and V is 2–3 h at a temperature of 1050 °C. After diffusion metallization, high-quality protective coatings with high microhardness were obtained on the surface of the products. Significant microhardness and good adhesion to the base of diffusion carbide coatings make them recommended for increasing the wear resistance and durability of structural and tool materials.