摘要
采用低温离子渗硫工艺在 W6 Mo5 Cr4 V2高速钢表面制备了硫化物固体润滑层 ,在 MM- 2 0 0型摩擦磨损试验机上对渗硫层的摩擦学性能进行了干摩擦试验研究 ,用原子力显微镜及扫描电子显微镜和 X射线光电子能谱分析渗层表面、截面、磨面的形貌及成分 ,用 X射线衍射仪分析了渗硫层相结构 .结果表明 ,高速钢表面渗硫层由 Fe S、WS2 和Mo S2 等具有固体润滑特性的硫化物共同组成 .微观分析发现 ,渗硫层由直径 30～ 80 nm的硫化物球状颗粒随机叠嵌而成 .纳米结构有利于磨损过程中氧化物的产生 ,对提高摩擦磨损性能有利 .干摩擦条件下 。
A sulfide layer was made on the surface of high-speed steel (W6Mo5Cr4V2) by means of low temperature ion sulfurization. The tribological properties of the sulfide layer under dry sliding were investigated on an MM-200 friction and wear test rig. An atomic force microscope (AFM) and a scanning electron microscope equipped with an energy dispersive spectrometer attachment were adopted to analyze the morphologies and compositions of the original and worn surfaces of the sulfide layer. The phase structure of the sulfide layer was determined by X-ray diffraction. The results show that the sulfide layer of W6Mo5Cr4V2 is composed of FeS, WS2 and MoS2 which have good solid lubricity. The sulfide layer is porous and contains randomly distributed nano-scale sulfide grains with the diameter of 30-80 nanometers. The sulfide layer with nano-structure is liable to oxidize and hence to enhance the formation of the oxide film during dry sliding. This subsequently leads to the improvement of tribological properties in dry sliding.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2002年第4期250-253,共4页
Tribology
关键词
高速钢
离子渗硫
纳米材料
摩擦磨损性能
Friction
Nanostructured materials
Steel
Sulfur compounds
Wear resistance
