En40B钢加纯稀土镧、铈、钕离子氮化

将纯稀土金属块镧、铈、钕分别放入离子氮化炉中作为溅射源，对氮化钢En40B钢进行离子氮化，发现纯稀土元素影响了炉内的辉光放电特性。用相关仪器和设备对氮化表层的化学元素分布，组织形貌和显微硬度进行了观察和测定，结果表明：纯稀土元素直接影响氮的扩散，导致各元素沿氮化导分布、氮化层组织结构和硬度分布的变化，从而影响了氮化效果，不同稀土元素影响效果有所不同。

Plasma Nitriding of En40B Steel with the Incorporation of Pure Rare Earth La, Ce and Nd

Pure rare earth metal block La, Ce and Nd was put into the nitrided furnace respectively as a sputter source when typical nitride steel En40B was plasma nitrided. It was found that the incorporation of pure rare earth resulted in the changing of characteristic of glow discharge. Analysis of samples after treatment was performed using related instruments and facilities to examine the effects of treatment on microstructure, micro hardness and element distribution. The results showed that the incorporation of rare earth metals in the glow discharge influenced the diffusion of nitrogen in some degree. Thus the difference of distribution of elements, structure and hardness in the nitrided layer was formed compared with the conventional be plasma nitrided. These significantly affected the response of the investigated steel on plasma nitriding. The extent of influence to plasma nitriding varied with different rare earth.