ISSN 2594-5327
55º Congresso anual — Vol. 55 , num. 1 (2000)
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The article presents results of computerized simulation of the gas nitriding process, demonstrating, in the first part, the effect of the nitriding potential of NH₃/H₂ atmosphere on the composition and growth kinetics of γ’ and ε nitride layers on pure iron. For the simulation, the recently developed NH₃/H₂/-T-(Fe,N) phase diagram, growth kinetics models for both phases, as well as latest results of experimental research were utilized. Simulation results indicate optimum possibilities of process control for the formation of layers of predictable phase composition, thickness of particular zones and surface nitrogen concentrations. The report also includes some data on growth kinetics of the nitride layer (ε/γ’ and α zones) on alloy steels. The role of nitride-forming and other alloying elements in process kinetics is discussed.
The article presents results of computerized simulation of the gas nitriding process, demonstrating, in the first part, the effect of the nitriding potential of NH₃/H₂ atmosphere on the composition and growth kinetics of γ’ and ε nitride layers on pure iron. For the simulation, the recently developed NH₃/H₂/-T-(Fe,N) phase diagram, growth kinetics models for both phases, as well as latest results of experimental research were utilized. Simulation results indicate optimum possibilities of process control for the formation of layers of predictable phase composition, thickness of particular zones and surface nitrogen concentrations. The report also includes some data on growth kinetics of the nitride layer (ε/γ’ and α zones) on alloy steels. The role of nitride-forming and other alloying elements in process kinetics is discussed.
Palavras-chave
nitriding control, simulation, growth kinetics, phase composition, nitrogen diffusion
nitriding control, simulation, growth kinetics, phase composition, nitrogen diffusion
Como citar
Maldzinski, L.; Liliental, W.; Tymowski, G.; Tacikowski, J..
CONTROL OF THE GAS NITRIDING PROCESS BY SIMULATION OF GROWTH KINETICS OF NITRIDE LAYERS,
p. 2439-2449.
In: 55º Congresso anual,
Rio de Janeiro, Brasil,
2000.
ISSN: 2594-5327, DOI 10.5151/2594-5327-C00992
