Nitrogen-saturated austenite layers produced on practically carbon-free and chromium-free austenitic steel (metastable austenite) of the composition Fe-27Ni-2Ti-Mo-Al-Nb using glow discharge assisted nitriding. Prior to the nitriding, steel was subjected to surface treatments, such as grinding with a sand paper, burnishing, and cooling in liquid nitrogen, which result in martensite being formed in the surface layer. The paper compares the frictional wear resistance of the nitrided layers formed on steel with various structures: the initial structure after being subjected to grinding, a martensitic-austenitic structure formed by cooling in liquid nitrogen, and a structure subjected to cooling and then nitrided.

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