List of Articles Plasma Nitriding

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  1 - Investigation nitride coating surface properties and wear on the hot work tool steel AISI H11 in the method pulsed plasma nitriding
  کیانوش طاهرخانی خیرالله محمدی حسین تارقلی زاده
  In this research, the effects of plasma nitriding parameters investigated on samples with different geometry. Samples were prepared were nitrided under the atmosphere content of 20%H2-80%N2, at the temperature of 520 c, the duty cycles of 30%, 50%, 80% and with frequenc More

  In this research, the effects of plasma nitriding parameters investigated on samples with different geometry. Samples were prepared were nitrided under the atmosphere content of 20%H2-80%N2, at the temperature of 520 c, the duty cycles of 30%, 50%, 80% and with frequencies of 10 kHz for 6 hours. Then the property of grooves surfaces investigate by experiments of the SEM, Roughness and Micro Hardness measurement. The results of the experiments showed that the surface of the plasma nitriding samples are covered by cauliflower form of particles that formation of this particles in plasma nitriding samples are due to sputtering of the surface during the process. With increasing thickness of the groove, frequency and duty cycle, roughness of surfaces raise. Also micro hardness rise with increasing the thickness of the groove and duty cycle resulting from the increase in percent of deposition particle nitride. The Hollow cathode phenomena occurred in sample with 2mm groove and 80% duty cycle in CPN. This will result in over heating of the sample which leads to a decrease hardness of the surface and an increasing in the Roughness of the surface. Then after the process plasma nitriding, the results of the pin on disk wear test showed that the nitrides coating have wear resistance better than the reference sample before treatment plasma nitriding. Manuscript profile
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  2 - Studying the Wear Behavior of applied coats on Titanium by Chromium Electroplating and Plasma Nitriding Processes
  Arvin Taghizadeh Tabrizi Hossein Aghajnai Hasan Saghafian Farhad Farhang Laleh
  10.30495/apme.2021.681635
  The surface properties of industrial parts and especially wear behavior of them plays an important role in life service of them. Chromium coat and plasma nitriding are two common ways of applying hard coat on diverse substrates. In this paper, both of these coats applie More

  The surface properties of industrial parts and especially wear behavior of them plays an important role in life service of them. Chromium coat and plasma nitriding are two common ways of applying hard coat on diverse substrates. In this paper, both of these coats applied on titanium substrate as an advanced engineering materials and the wear behavior of them were compared. For this aim, Pin on disk test was carried out and the weight loss was measured. For determining the wear mechanism of the sample, field emission scanning electron microscopy study was carried out on wear traces. Results show that although the achieved surface micro hardness value of chromium coats is higher than nitride samples, 594 HV at current density of 50 A/dm2 and 60 min versus 528 HV at 600 oC for nitride sample, but they show the weaker wear resistance. Adhesive wear mechanism is determined mechanism at both samples. Also, the lowest coefficient of friction is obtained at sample nitride at 600 oC Manuscript profile