轴承钢离子注N+B层磨损破坏过程的研究

The Wear Damage Process of the N+B Ion Implanted Layer of GCr15 Bearing Steel

作者对GCr15轴承钢表面进行了先注入N离子再注入B离子的处理,并且通过对注入表面的X-射线物相分析,以及表面成分的X-光电子能谱分析和俄歇电子能谱剖面分析,同时结合对注入层摩擦磨损行为的研究发现,轴承钢表面在离子注入N+B后形成了含有六方BN和ε-Fe_2N-Fe_3N相的表面层,因而明显地改善了轴承钢表面的抗粘着转移和抗擦伤能力,提高了表面的耐磨性,降低了轴承钢与偶件之间的摩擦系数。此外,作者还对N+B离子注入前后之GCr15轴承钢的磨损过程和破坏机制进行了讨论。

The ion implantation of N+B into GCr15 bearing steel was completed. Then, the analysis of the implanted layer was conducted by means of X-ray diffraction, X-ray photoelectron spec-troscopy and Auger sputter depth profile. Furthermore, the tribological behaviours of the specimen before and after ion implantation were examined. The experimental results shown that the adhesive and abrasive resistance of GCr15 bearing steel was greatly improved because of hexagonal BN and ε-Fe2N-Fe3N being formed in the implanted layer. As a result, the wear resistance of the implanted GCr15 bearing steel is higher and the friction coefficient is lower than that of unimplanted bearing steel. Besides, the wear process and damage mechanism of GCr15 bearing steel before and after ion implantation are also carefully discussed in this paper.