| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
New Frontiers in Physical Metallurgy of Steels
|
| Presentation Title |
Simulation of the Nitriding and Ferritic Nitrocarburizing (FNC) Processes |
| Author(s) |
Mei Yang, Haoxing You, Richard D. Sisson |
| On-Site Speaker (Planned) |
Haoxing You |
| Abstract Scope |
Nitriding and FNC are surface treatments that improve the wear and corrosion resistance of a wide variety of steels and cast irons. During nitriding nitrogen is absorbed to form a compound layer and a hardened diffusion zone. In the FNC process nitrogen and carbon are concomitantly absorbed. The FNC proceeds much faster than the nitriding due to the thermodynamic interactions of nitrogen and carbon in the alloy. In the present work, a physics-based software model is being developed to predict the nitriding and FNC performance of steels with tempered martensitic microstructure. The composition of the compound layer is predicted using computational thermodynamics to develop alloy specific nitriding potential KN and carburizing potential KC phase diagrams. The thickness of the compound layer is predicted using parabolic kinetics. The diffusion in the tempered martensite case is modeled using diffusion with a reaction. These model predictions are compared with experimental results. |