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Bestimmung des s‐Phasen‐Bildungskoeffizienten plasmanitrierter austenitischer Stähle
Author(s) -
Reinders P.M.,
Patel R.R.,
Musekamp J.,
Kaestner P.,
Hoche H.,
Bräuer G.,
Oechsner M.
Publication year - 2021
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.202000029
Subject(s) - nitriding , materials science , austenitic stainless steel , scanning electron microscope , austenite , metallurgy , plasma , phase (matter) , glow discharge , hardening (computing) , analytical chemistry (journal) , corrosion , composite material , microstructure , layer (electronics) , chemistry , physics , organic chemistry , chromatography , quantum mechanics
Plasma nitriding is an effective surface hardening treatment for austenitic stainless steels. During plasma nitriding, s‐phase formation takes place which is not only responsible for high hardness and wear resistance but also for good corrosion resistance. In order to estimate the thickness of the s‐phase for austenitic stainless steel in a plasma nitriding process, an empirical model is devised. A number of plasma nitriding processes of austenitic stainless steel (304 L) were carried out with varying treatment temperature from 360 °C to 450 °C and process duration ranging from 10 hours to 24 hours with constant pressure, voltage, pulse‐to‐pause‐ratio and gas mixture. A time‐temperature dependent s‐phase formation coefficient is determined by measuring the thickness of the s‐phase using a scanning electron microscope (SEM) and glow discharge optical emission spectroscopy (GDOES). The developed model is verified by three controlled experiments. This model fits the thickness of the s‐phase with an error of less than 6 %.