Plasma nitriding hardens steel matter surfaces by diffusing nitrogen
https://johnathanurrr329.capitaljays.com/posts/restaurant-and-cafe-floors-with-the-useful-resource-of-with-the-aid-of-incredibly-through-means-of-matter-surfaces
Plasma nitriding hardens steel matter surfaces by diffusing nitrogen, increasing wear resistance while preserving core toughness and dimensional stability.