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用透射电镜研究了稀土催渗离子渗氮层的微观结构。结果表明，稀土催渗可使γ相晶粒细化，晶界面缺陷增加；稀土的加入，增加了离子轰击效应，可使γ相内空位、位错环和堆垛层错等晶体缺陷的数量增加，可在表面０．０８ｍｍ厚度的扩散层铁素体内产生高密度位错。大量晶体缺陷的产生是稀土加速离子渗氮过程中氮扩散的主要原因。
The microstructure of rare earth catalytic ion nitriding layer was studied by transmission electron microscope. The results show that the rare earths infiltration can refine the γ phase grains and increase the grain boundary defects. The addition of rare earths increases the ion bombardment effect, which can cause the crystal defects such as vacancies, dislocation loops and stacking fault in γ phase Increase in the number of the surface 0.08mm thick diffusion layer ferrite produced high density dislocations. A large number of crystal defects are rare earths to accelerate the process of ion nitriding the main reason for nitrogen diffusion.