| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Performance Steels
|
| Presentation Title |
High Temperature Nitriding Behavior of Low Carbon Low Alloy Steel |
| Author(s) |
Ryota Takao, Goro Miyamoto, Tadashi Furuhara |
| On-Site Speaker (Planned) |
Ryota Takao |
| Abstract Scope |
To achieve a thick case-hardened layer, high-temperature nitriding at 903K, that is above eutectoid temperature unlike conventional nitriding, was performed using low-carbon, low-alloy steel. Subsequently, the nitrided layer was characterized to understand the nitriding behavior at high temperatures. High-temperature nitriding enabled nitrogen to diffuse more deeply into the interior and increased the thickness of the case hardening layer and the nitrogen compound layer. EBSD analysis showed that the compound layer changed its structure as γ'→ε→γ→α phase (substrate) from the top surface, and it was found thatε phase was especially dominant. In the compound layer, phases with higher nitrogen composition were formed as the surface nitrogen concentration increased, and carbon enrichment into the compound layer was also observed, which is considered to affect the stabilization of the ε-phase. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Phase Transformations, Characterization |