摘要
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 formation of the complex optimum surface layer on H13 steel by C,V and V+C dual implantation has been studied. The fine crystal grains and new phases in steel were observed by TEM.Both grain boundary and dislocation strengthening was enhanced. It was found from the Auger analysis that the concentrations of C and V were 50% and 30% respectively,and therefore the solid solution strengthening appeared.It was seen from X-ray diffractions that the dispersion strengthening phases Fe2C,Fe5C2 FeV and V2C were formed.The diffraction peaks of these phases were increasing after annealing,indicating that the phases were growing.Hardness and wear resistance of the implanted layers were greatly increased because of the formation of these phases,especially V2C.The amorphous layers were also observed by TEM.
出处
《核技术》
CAS
CSCD
北大核心
1995年第2期65-72,共8页
Nuclear Techniques
基金
863高科技项目
国家自然科学基金
北京市自然科学基金
