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给出了C、V离子和V+C双重离子注入H13钢合成表面优化层机理的研究结果,包括表面薄碳膜和弥散硬化层的形成。用电镜观察到离子注入时晶粒细化和新相的析出,使晶界强化和位错强化效果增强。俄歇分析表明C、V离子注入浓度将分别达到50%和30%的原子比例,即形成固溶强化。X射线衍射分析表明,注入层中出现了弥散的Fe2C、Fe5C2、FeV和V2C相.注入样品退火,这些相的衍射峰增强,说明这些相在生长.由于这些弥散相的存在使注入层硬度和抗磨损效果均有明显的提高,尤其是V2C的出现更增强了这种效果.用电镜还观察到了无序层的出现.
The research results on the mechanism of surface optimization of H13 steel by double ion implantation of C, V and V + C are given, including the formation of thin carbon films and diffusion-hardened layers. The grain refinement and precipitation of new phase during ion implantation were observed by electron microscopy, which enhanced grain boundary strengthening and dislocation strengthening. Auger analysis shows that C and V ion implantation concentration will reach 50% and 30% of the atomic ratio, that is, the formation of solid solution strengthening. X-ray diffraction analysis showed that dispersed Fe2C, Fe5C2, FeV and V2C phases appeared in the implanted layer. Samples were annealed and the diffraction peaks of these phases increased, indicating that these phases are growing. Due to the existence of these dispersed phases, the hardness and abrasion resistance of the injected layer are obviously improved. In particular, the appearance of V2C enhances the effect. The appearance of an unordered layer was also observed with the electron microscope.