摘要 本文研究了在一定切削參數下干、濕式切削加工淬硬鋼時四種PCBN刀具的刀具壽命、磨損形式和磨損機理。通過掃描電子顯微鏡觀察不同切削行程下刀尖形貌和刀具后刀面磨損量，并對刀具前后刀面進行能譜分析。結果表明濕式切削時的后刀面磨損量小于干式切削，說明刀具濕切比干切時具有較好的性能；PCBN刀具的磨損形式有前刀面磨損、后刀面磨損，其中前刀面磨損的表現形式為月牙洼磨損，磨損機理為機械磨損、氧化磨損和黏結劑磨損，而后刀面磨損機理有機械磨損、氧化磨損、黏結劑磨損和擴散磨損等；同時還發現CBN含量下降，刀具的后刀面磨損量也有下降趨勢，即刀具的切削壽命有延長趨勢。（金剛石與磨料磨具工程2009年第三期）
　　
　　Abstract The lifespan，wear form and wear mechanism of four kinds of PCBN cutting tools were studied through dry cutting and wet cutting of quenched steel(45CrNiMov)under given cutting parameters．The mor—phology and flank wear of PCBN tip in different cutting stroke were observed via SEM and analyzed by EDS．The results show that the wear of flank face in wet cutting is less serious than the case in dry cutting，which means that the cutting tools have better performance when used in wet cutting．The wear forms of PCBN cutting tools include rake wear and flank wear．The rake wear is presented as crater wear and its wear mechanisms are abrasive，oxidation and adhesion, while the wear mechanisms of flank wear are abrasive．oxidation．adhesion and diffusion．And also，we know that the wear amount of rear face decreases, i．e., the lifespan of cutting tools become longer with lower CBN content．