Effect of Plasma Ion Nitriding Temperature on the Durability of SCM440 Steel

Sang-Ok Chong, Il-Cho Park, Cheon Ho Lee, Seong-Jong KIm
2019 Journal of Welding and Joining  
In this study, plasma ion nitriding technology was applied to investigate the effect of plasma ion nitriding temperature and the surface roughness of SCM440 steel on the durability of SCM440 steel for gear material. The mechanical properties of the plasma ion nitrided specimens were examined using a comprehensive analysis of nitriding depth, phase change, microstructure and micro-Vickers hardness values. As a result, the durability of SCM440 steel was found to be more significantly affected by
more » ... cantly affected by plasma ion nitriding temperature than surface roughness. As the plasma ion nitriding temperature increased, the composite phase of brittle γ'-Fe 4 N + ε-Fe 2-3 N was converted into a single phase of γ'-Fe 4 N, and the depth of the nitride layer increased, making it suitable for gear materials.
doi:10.5781/jwj.2019.37.5.3 fatcat:65ehb6hzvva2bhhde45sv64c3i