A new model for growth mechanism of nitride layers in plasma nitriding of AISI H11 hot work tool steel
H Aghajani, M Torshizi, M Soltanieh - Vacuum, 2017 - Elsevier
A new mechanism of layer growth in plasma nitriding of H11 hot work tool steel was
developed. The nitriding was performed at 450, 500 and 550° C temperature, nitriding times
of 10, 45, 90, 150, 300, 450 and 600 min, in a 25% H2: 75% N2 atmosphere and DC-pulsed
plasma nitriding unit. The surface was studied by optical and scanning electron microscopy.
According to the results, values of Q and D 0 for nitrogen diffusion in steel substrate were as
55186 (j/mol) and 3.02× 10− 9 (m 2/s), respectively. The dimensions of surface nitrides were …
developed. The nitriding was performed at 450, 500 and 550° C temperature, nitriding times
of 10, 45, 90, 150, 300, 450 and 600 min, in a 25% H2: 75% N2 atmosphere and DC-pulsed
plasma nitriding unit. The surface was studied by optical and scanning electron microscopy.
According to the results, values of Q and D 0 for nitrogen diffusion in steel substrate were as
55186 (j/mol) and 3.02× 10− 9 (m 2/s), respectively. The dimensions of surface nitrides were …
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