PCBN刀具以车代磨加工20CrMnTi合金钢试验研究①苏君,冯佩佩(河南工业职业技术学院,河南南阳473000)摘要:采用聚晶立方氮化硼(PCBN)刀具,以车代磨对20CrMnTi合金钢进行精密切削加工。分析了切削过程中PCBN刀具的磨损形式和磨损机理,研究了不同切削参数对刀具寿命与工件表面粗糙度的影响。结果表明,切削过程中刀具发生了扩散、崩刃以及氧化磨损;在硬态切削三要素中,切削进给量和切削速度对刀具磨损量影响较大,切削进给量对工件表面粗糙度影响较大。关键词:超硬刀具;PCBN刀具;切削;20CrMnTi;以车代磨中图分类号:TG712;TB34文献标识码:Adoi:10.3969/j.issn.0253⁃6099.2023.04.033文章编号:0253⁃6099(2023)04⁃0154⁃04ExperimentalStudyonCutting20CrMnTiAlloySteelwithPCBNToolbyTurningInsteadofGrindingSUJun,FENGPeipei(HenanPolytechnicInstitute,Nanyang473000,Henan,China)Abstract:20CrMnTialloysteelwaspreciselycutbyturninginsteadofgrindingusingapolycrystallinecubicboronnitride(PCBN)tool.BasedonanalysisoftheformandmechanismofPCBNtoolwearduringthecuttingprocess,theinfluencesofdifferentcuttingparametersontoollifeandsurfaceroughnessofworkpiecewerestudied.Theresultsshowthatthetoolissubjectedtodiffusion,chippingandsevereoxidativewear.Amongthosethreeelementsofhardmaterialcutting,bothfeedrateandcuttingspeedbringgreatinfluencetotoolwear,andfeedratehasgreatinfluenc...