Composition, Structure, and Properties of Ti, Al, Cr, N, C Multilayer Coatings on AISI W1-7 Alloyed Tool Steel

New methods of diffusion metallization AISI W1-7 steel have been developed. The paper proposes a comparative analysis the properties and characteristics after three chemical heat treatment: nitriding, nitrogen titration by physical deposition from gas phase, chromium plating with subsequent titanium alloys. results are presented as comprehensive coatings: metallographic, micro-X-ray spectral, X-ray durometric, resistance, wear resistance. It is established that multilayer protective coatings formed result treatments. shown consist carbide nitride zones, intermetallic, an Al2O3 layer outside coating. found to contain barrier layers prevent aluminum penetrating substrate. maximum microhardness typical for based on carbide—30.3–35.5 GPa nitride—22.0–22.6 GPa, heat-resistant steels at temperature 900 °C in 4.2–8.5 times resistance under sliding friction without lubrication up 5.4 compared samples treatment.