N^+注入GCr15钢摩擦磨损性能研究

The tribological properties of N^+ ion implanted GCr15 steel

通过多种表面测试手段对氮离子注入 GCr15钢的摩擦磨损性能进行了研究结果表明，由于离子注入引起注入层显微硬度提高，表面残余压应力增大，表面粗糙度降低，以及注入层形成了大量细小弥散分布的硬质析出相ε－ Fe2－ 3N，使摩擦磨损机理发生了变化，从而改善了材料的摩擦学性能在本实验条件下，所得最佳参数为注入剂量 4× 1017 ions/cm2，注入能量 100

The tribological properties of GCr15 steel were studied with various surface testing methods. The results showed that the physical and mechanical properties, as well as the chemical properties, of the surface layers were greatly changed by ion implantation, ie. decreases in surface roughness, increases in microhardness accompanied with compressive stress, and a large quantity of finely dispersed hard secondary－ phase particles(ε－ Fe2－ 3N) coexisting with the matrix structure were formed in the nitrogen implanted surface film, etc. The friction and wear mechanisms were altered. Thereby, the tribological properties of surface layers were improved. The optimal parameters of two factors, under the condition of the experimentation, were found to be 4× 1017 ions/cm2 and 100 keV respectively.