MICROSTRUCTURE AND THERMAL STABILITY OF 0.08%C-17.0%Cr-0.8%Ti STEEL AFTER HIGH-TEMPERATURE NITRIDING AND HIGH PRESSURE TORSION
The influence of high pressure torsion (HPT) on structure, phase composition, microhardness and thermal stability of 0.08%C-17.0%Cr-0.8%Ti steel subjected to volume high-temperature nitriding were investigated. HPT results in the formation of the nanostructure with structural elements size of 55-85 nm. Microhardness of nitrided steel after HPT increases by 2.2-2.7 times. Hardening is retained when heated to 450 °C.