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NITRIDING  
Nitriding is a method for enriching the surface layer of ferrous materials with defined quantities of nitrogen or, in the case of nitrocarburising, of nitrogen and carbon. This not only enhances the hardness, but also the abrasion resistance, fatigue strength, and corrosion resistance. Also improved are the antiseize and antifrictional properties. At the same time, there are no structural transformations from austenite to martensite, so high dimensional stability is ensured.
   
As a rule, nitriding penetrates to depths of max 0.8 mm. Profundinieren, a deep nitriding method developed by Dr.-Ing. Helmut Reese, even penetrates to depths exceeding 1.0 mm, depending on the material. Provided that the corresponding steels are used, non-deforming nitriding is in many instances a viable alternative to case and surface hardening. Nitriding steels are listed under DIN 17211 and EN 10085.
Our specialists at Härterei Reese assist the designer in the choice of materials.