The investigation of wear and corrosion behavior of plasma nitrided DIN 1.2210 cold work tool steel

Direct Current and Pulsed Direct Current Plasma Nitriding of Ferrous Materials a Critical Review

“…25 μm thick (Podgornik et al, 1998) outer, compound layer consists mainly of γ'-Fe4N or ε-Fe2,3N intermetallic phases -iron nitrides (Sirin and Kaluc, 2012;Mashreghi et al, 2013). Study by Weber et al (Weber et al, 1995) revealed that the corrosion rate of iron in an acidic solution can be reduced by one order of magnitude when the ε-Fe2,6N phases are formed, and reduced by three orders of magnitude by the formation of γ'-Fe4N.…”

“…The diffusion layer consists mainly of interstitial atoms in solid solution and fine and coherent nitride precipitates (Sirin and Kaluc, 2012;Mashreghi, 2013). The hardness and wear resistance of the diffusion layer depends on the time and temperature of the treatment, the gaseous mixture composition, the concentration of the alloying elements on the steel, the amount of precipitated nitrides and the initial microstructure of the material (Sirin and Kaluc, 2012).…”

Effect of Plasma Nitriding Process Conditions on Corrosion Resistance of 440B Martensitic Stainless Steel

“…Its main aim is to introduce elemental nitrogen to the surface of a metal part for subsequent diffusion into the material (Sirin and Kaluc, 2012;Mashreghi et al, 2013). As a result, nitrogen-rich phases form at the steel's surface (Basu et al, 2008) -a compound, "white" layer and a diffusion zone (Sirin and Kaluc, 2012;Mashreghi et al, 2013). The outer and considerably thinner layer (usually ca.…”

“…The outer and considerably thinner layer (usually ca. 25 µ thick) (Podgornik et al, 1998) consists of γ'-Fe4N or ε-Fe2,3N inter-metallic phases (Sirin and Kaluc, 2012;Mashreghi et al, 2013). It is commonly called as "white layer" due to its white colour after Nital etch on the mictoscopy or, simply, referred to as "compound layer" (Sirin and Kaluc, 2012).…”

“…It is commonly called as "white layer" due to its white colour after Nital etch on the mictoscopy or, simply, referred to as "compound layer" (Sirin and Kaluc, 2012). On the other hand, the diffusion zone consists of a nitrogen rich Mashreghi et al, 2013). Their proportion in the nitride-affected layer depends upon the plasma activity, treatment duration, microstructure of the sample and its temperature (Tuckart et al, 2007).…”