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利用低温离子渗硫技术在CrMoCu合金铸铁网格化激光淬火表面制备了渗硫层,分析了其形貌组成与结构,考察了渗硫激光复合表面的摩擦学性能。结果表明:渗硫层表面疏松多孔,在淬火区域硫化物颗粒细小,结构致密,其相组成主要为FeS;在干摩擦条件下,渗硫层能降低网格化激光淬火表面的摩擦因数,提高其耐磨性能,其主要原因是硫化物及摩擦化学反应生成的氧化物能在摩擦表面形成边界润滑膜,抑制了磨粒磨损和粘着磨损,有效减弱了网格化激光淬火表面“摩擦台阶”效应。
The sulfurized layer was prepared on the surface of CrMoCu cast iron grid laser hardening by low temperature ionized sulfur infiltration technique. The morphology and composition of the layer were analyzed. The tribological properties of the composite surface were investigated. The results show that the surface of sulphurous sulphide layer is porous and porous, the sulphides particles are fine and the structure is dense in the quenched area, and the phase composition is mainly FeS. Under the condition of dry friction, the sulphurous layer can reduce the friction coefficient of the latticed surface and increase The main reason for the wear resistance is that the oxides formed by the sulfides and tribo-chemical reactions form a boundary lubricating film on the friction surface, which restrains the wear of the abrasive particles and the adhesive wear, and effectively reduces the friction of the grid-shaped laser quenching surface "effect.