石墨烯纳米流体加工Ti-6Al-4V合金的黏着磨损、表面粗糙度和切削力

Adhesive Wear, Surface Roughness, and Cutting Forces ofTi-6Al-4V Alloy Machining with Graphene Nanofluids

提出了一种基于石墨烯纳米颗粒分散在菜籽油中的切削液为加工区域提供润滑/冷却的新加工方式,确定了该纳米流体对刀具切屑粘附层的影响。与干切削相比,使用菜籽油+石墨烯加工后的刀面和前刀面的切屑粘附层厚度分别降低了38.8%和28.8%,切削力降低51.4%,工件表面粗糙度降低50.1%。石墨烯较高的导热系数可以降低切割区域的温度。此外,石墨烯可以渗透到刀具与工件之间的接触区域,有效地保护了刀具的涂层材料,减少了粘附在工件表面的切屑,并且填充了工件表面形成的凹坑,从而提升了表面质量。

A novel machining method based on the graphene nanoparticles dispersed in canola oil as the cutting fluid to provide lubrication/cooling effect for the processing area was proposed.The effects of the nanofluid on the chip adhesion layer of the cutter were determined.Compared with the dry cutting method,the thicknesses of chip adhesion layers on the flank face and rake face of cutter decrease by 38.8%and 28.8%with the canola oil+graphene nanofluid,respectively.In addition,the cutting force and workpiece surface roughness decrease by 51.4%and 50.1%,respectively.The relatively high thermal conductivity of graphene can reduce the temperature of the cutting zone.In addition,the graphene can penetrate the contact zone between the chip adhesion layer of cutter and the workpiece,which effectively protects the coating of cutting tool and decreases the chip adhering to the workpiece surface.Besides,the graphene can fill the pits on the workpiece surface,thus improving the cutter surface quality.