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运用渗氮-渗硫复合处理技术在Ti-6Al-4V表面形成复合渗层。用X射线衍射仪、扫描电子显微镜对渗氮后600℃下不同时间渗硫所形成的复合渗层的相结构、表面及微观形貌进行了分析;并对复合渗层的截面硬度梯度进行了测定。结果表明:复合渗层由钛的硫化物、钛的氮化物、过渡层及基体组成。在渗硫温度一定时,渗硫时间的变化,会对渗层的截面硬度梯度、截面形貌产生较大的影响。其中900℃×4 h渗氮+600℃×3 h渗硫的复合处理,所得到的复合渗层是较理想的摩擦学表面。
Using nitriding - sulfurizing composite treatment technology in Ti-6Al-4V surface of the formation of composite layer. The phase structure, surface and microstructure of the composite infiltrated layer formed by infiltrating at 600 ℃ for different time after nitriding were analyzed by X-ray diffractometer and scanning electron microscope. The cross-section hardness gradient of the composite infiltrated layer was also studied Determination. The results show that the composite infiltration layer consists of titanium sulfide, titanium nitride, transition layer and matrix. When the infiltration temperature is constant, the change of infiltration time will have a great influence on the hardness gradient and cross-section morphology of the infiltration layer. In which 900 ℃ × 4 h nitriding + 600 ℃ × 3 h sulfur infiltration composite treatment, the resulting composite layer is an ideal tribological surface.