氮离子注入对9Cr18Mo钢抗微动磨损性能的影响

作者对9Cr18Mo钢的氮离子注入试样及未注入试样进行了微动磨损的对比试验,利用扫描电子显微镜对磨损表面的形貌进行了观察,利用俄歇电子能谱仪和微区X-射线衍射仪对氮离子注入试样表面与磨损表面的元素分布及相组成进行了分析。结果表明,氮离子注入不仅能使材料的抗微动磨损性能明显提高,而且还可以使材料的微动磨损机制发生改变。作者认为,在氮离子注入层内形成了氮化物相,氮化物相的析出有助于改善9Cr18Mo钢的抗微动磨损性能。

The Effect of Nitrogen Ion Implantation on the Fretting Wear Resistance of 9Crl8Mo Steel

The fretting wear experiments were made on nitrogen imp-larted samples and unimplanted samples of 9Crl8Mo steel respectively in this in vestigation. SEM was used to observe the topography of the fretted surfaces. AES and micro-region X-ray diffraction were also used to deter" mine the elements distribution and phase construction of the implanted surface tilm and wear track surface. The results have shown that the fret-ting wear resistance of the steel was obviously increased after implanting nitrogen ion, and the fretting wear mechanism was altered. Nitrides were formed in the nitrogen implanted surface film. The precipitation of these nitrides has some contribution to the enhancement of the fretting wear resistance of 9Crl8Mo steel.