Contact Fatigue of 20KhN3Ð and 55SMFA Steels with Surface Nanostructured Layers in Corrosive-Abrasive Media

We study the contact fatigue of 20KhN3A and 55SMFA chisel steels after thermochemical and thermal modes of treatment and grinding and with surface nanocrystalline structures formed by mechanical pulsed treatment in corrosive and corrosive-abrasive media under working loads acting upon the chisel components. It is shown that nanostructuring increases the contact durability as compared with grinding in various working media. On steels with surface layers with nanocrystalline structures, the influence of inhibitors is less efficient than the influence of heat treatment due to the subsurface initiation of fatigue cracks.