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高压冷却下PCBN刀具切削高温合金表面完整性研究的开题报告 Abstract Hightemperaturealloysarewidelyusedinvariousfields,suchasaerospace,petrochemicalindustry,andsoon,duetotheirexcellenthigh-temperatureproperties.Theapplicationofcuttingtoolsinthisfieldisbecomingmorecommon,andPCBNtoolsarethepreferredtoolsbecauseoftheirhighhardness,wearresistance,andthermalconductivity.However,duringthecuttingprocess,thehigh-temperaturegeneratedbythecuttingprocesscancausethesurfaceoftheworkpiecetobedefected,whichseriouslyaffectsthequalityoftheworkpiece.Toavoidthisproblem,thehigh-pressurecoolingtechnologyisintroducedtocoolthecuttingprocess,andimprovethesurfaceintegrityoftheworkpiece.ThispaperproposestostudythesurfaceintegrityoftheworkpieceduringthecuttingofhightemperaturealloyusingPCBNtoolsunderhigh-pressurecooling. Introduction High-temperaturealloysarewidelyusedinvariousfields,suchasaerospace,petrochemicalindustry,andsoonbecauseoftheirexcellenthigh-temperatureproperties.Duringtheprocessingofhigh-temperaturealloys,itisnecessarytousecuttingtoolswithgoodwearresistanceandthermalconductivity.PCBNtoolsarethepreferredtoolsbecauseoftheirhighhardness,wearresistance,andthermalconductivity.However,thehigh-temperaturegeneratedbythecuttingprocesscancausethesurfaceoftheworkpiecetobedefected,whichseriouslyaffectsthequalityoftheworkpiece.Inordertoimprovethesurfaceintegrityoftheworkpiece,high-pressurecoolingtechnologyisintroducedtocoolthecuttingprocess. ResearchBackground Overheatingduringcuttingwillaffectthequalityandprocessingefficiencyoftheworkpiece.Inordertosolvetheproblemofworkpiecesurfaceintegrity,coolingtechnologyiswidelyused.High-pressurecoolingisakindofcoolingtechnologythathasbeendevelopedrapidlyinrecentyears.High-pressurecoolingtechnologycaneffectivelyreducethecuttingtemperature,andimprovethesurfacequalityoftheworkpiece.Inthecuttingofhigh-temperaturealloys,high-pressurecoolingtechnologyhasobviousadvantagescomparedwithconventionalcoolingmethods. ResearchObjectives Theobjectiveofthisresearchistoinvestigatetheeffectofhigh-pr