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为了探讨离子注入改善金属和合金材料减摩抗磨性能的作用机理，对３种剂量的Ｃｒ离子注入纯铁改性层的元素深度分布和显微硬度进行了考察，并对离子注入和未经离子注入试样在无润滑下的摩擦学性能作了对比试验研究．结果表明：在给定的试验条件下，Ｃｒ离子剂量为１×１０１７ｉｏｎｓ／ｃｍ２注入的表面改性效果最好，可使纯铁的显微硬度由未注入时的２．４ＧＰａ提高到３．０ＧＰａ；在相对湿度为８８％的大气环境中，注入试样的摩擦系数比未经注入试样的约低５０％，耐磨性比后者的高２～３倍．Ｘ射线光电子能谱等分析发现，Ｃｒ离子注入能促进纯铁表面形成氧化物膜．在相对湿度为５０％时，氧化物膜主要由Ｆｅ２Ｏ３组成；在相对湿度为８８％时，这种膜主要由Ｆｅ２Ｏ４组成．因此，Ｃｒ离子注入试样在高湿度下的减摩抗磨性能更好
In order to explore the mechanism of ion implantation to improve the friction and wear resistance of metal and alloy materials, the depth of element distribution and microhardness of three kinds of ion-implanted pure iron modified layer were investigated. The tribological properties of the ion-implanted samples without lubrication were compared. The results show that under the given experimental conditions, the surface modification effect of Cr ion dose of 1 × 10 17 ions / cm 2 is the best, which can increase the microhardness of pure iron from 2.4 GPa to 3.0 GPa In the atmosphere with relative humidity of 88%, the friction coefficient of the injected sample is about 50% lower than that of the non-injected sample, and the abrasion resistance is 2 to 3 times higher than that of the latter. X-ray photoelectron spectroscopy analysis found that Cr ion implantation can promote the formation of oxide film on the surface of pure iron. When the relative humidity is 50%, the oxide film mainly consists of Fe2O3; at a relative humidity of 88%, the film mainly consists of Fe2O4. Therefore, Cr ion-implanted samples have better friction and wear resistance under high humidity