摘要
首次给出了Ｍｏ＋Ｃ和Ｗ＋Ｃ双离子注入Ｈ１３钢合成优化表面层机理的研究结果，包括表面薄碳膜和弥散硬化层的形成。电镜中观察到这些离子注入时晶粒细化和密集位错的出现，同时在晶界间析出相以ＭｏＣ为主，在晶界内析出相则以Ｆｅ２ＭｏＣ和ＭｏＣ为主；这将使晶界强化和位错强化效果增强。Ｘ射线衍射分析表明，注入层中出现了弥散的ＦＥ２Ｃ，Ｆｅ５Ｃ２，ＦｅＭｏ，Ｆｅ３Ｍ０２，ＭｏＣ，ＭｏＣｘ，Ｍｏ２Ｃ，Ｆｅ２ｗ，Ｆｅ７Ｗ６，ＷＣ和Ｗ２Ｃ相。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。首次用俄歇分析观察到表面有一层碳膜存在，这将引起表面的自润滑效果。
Formation of complex optimum surface layer and measured results for Mo+C and W+C dual implantation into H13 steel are given. The fine crystal grains,dense dislocations in steel were observed by TEM. The Fe_2MoC and MoC are observed in grains, the MoC phases are only measured in grain boundaries. The fine grain strengthening, dislocation strengthening and dispersion strengthening will be enhanced.It can be seen from X-raydiffractions that the dispersion strengthening phases are formed such as Fe_2C, Fe_3C_2, FeMo, Fe_3Mo_2,MOC, MoCx, Mo_2C, Fe_2W, Fe_7W_6, WC and W_2C for the dualimplantation. So that the hardness and wear resistance effects of the implanted layersare improved. The thin carbon film on surface of implanted layer is first observedby Anger analysis, the self lubrication is appeared.
出处
《北京师范大学学报（自然科学版）》
CSCD
1994年第1期90-96,共7页
Journal of Beijing Normal University(Natural Science)
基金
国家自然科学基金
国家"八六三"高科技项目
北京市自然科学基金
关键词
离子注入
H13钢
抗磨损
复合层
pulse
dual ion implantation
H13 steel
wear resistance
