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通过在前刀面月牙洼磨损区域加工装填MoS2固体润滑剂的微孔产生“微池效应”来改善刀具的摩擦学特性,制备了YG8微池润滑刀具.以该微池刀具对45#钢进行干切削试验,结果表明:微池刀具与普通的YG8刀具相比具有良好的摩擦磨损特性,切削力明显减小,前刀面摩擦系数显著降低.通过扫描电子显微镜(SEM)和能谱分析(EDX)对微池刀具前刀面观察研究,分析了刀具自润滑机理:微池刀具前刀面小孔中的润滑剂受热膨胀及切屑摩擦挤压作用析出,在前刀面表面拖覆形成固体润滑层,直接渗入到刀屑接触区域,从而起到减摩润滑作用,改善刀具基体减摩抗磨性能.润滑膜层在切削加工中是一个润滑膜形成、磨损、再形成的循环过程,微池润滑刀具在微孔完全磨损的整个生命周期内始终具有自润滑效果.
The YG8 micro-pool lubrication tool was prepared by processing the micro-pores of MoS2 solid lubricant in the rake face of the crater to improve the tribological properties of the tool.With this micro-pool cutter on 45 # The results of dry cutting tests showed that compared with the conventional YG8 cutting tool, the micro-cutting tool had a good friction and wear characteristics, the cutting force was significantly reduced, and the friction coefficient of the rake face was significantly reduced.Furthermore, the scanning electron microscopy (SEM) Analysis (EDX) of the micro-pool tool rake surface observation and analysis of the tool self-lubrication mechanism: micro-pool tool rake face small holes in the lubricant thermal expansion and chip friction squeeze precipitation, the rake surface dragging Forming a solid lubricant layer that directly penetrates into the contact area of the chip breaker so as to reduce the frictional lubrication and improve the anti-friction and anti-wear properties of the tool substrate Lubricant film is a lubricating film formed, worn and re-formed in the cutting process , Microwell Lubrication Tools always have a self-lubricating effect throughout the entire life cycle of the micro-pores.