Application of hollow cathode effect for local ion nitriding of machine parts

Local Ion Nitriding of 38KhMYuA Steel with Glow Discharge in a Hollow Cathode

“…As a result of thermal treatment, tempering troostite is observed as a dark needle-like structure in the light fields of martensite [8]. The surface micro-hardness steel 38HMYUA after quenching and tempering is 370 ± 20 HV 100 .…”

Ion Nitriding of Gears with Hollow Cathode Effect

“…Analysis of the literature showed that ion nitriding is one of the most common methods of structural and phase modification from the variety of methods of surface hardening [2,3,4]. Ion nitriding advantages over traditional methods (gas nitriding, nitriding in liquids, etc.)…”

“…Ion nitriding advantages over traditional methods (gas nitriding, nitriding in liquids, etc.) are in possibility of obtaining the diffusion layers of specific phase composition, good surface finish, possibility of nitriding of surface-passivating materials without additional processing; economical and environmentally friendly process [5,6].…”

“…Using the hollow cathode effect allows to accelerate the diffusion process of nitrogen locally. This leads to reducing the process time [3,4]. Contrariwise, the nitriding process becomes more complicated.…”