镍基高温合金切削刀具磨损表/界面特性研究现状

Nickel-based superalloy, recently, has been attracted much more attention in the aerospace industry as key components in aero-engines and gas turbines due to the outstanding properties. The cutting process of nickel-based superalloy is accompanied by strong coupling effects of thermal-mechanical loads due to low thermal conductivity and high-temperature strength, further resulting in serious tool bonding/adhesion wear. Aiming to the adhesion/diffusion issues, we reviewed the recent advances in the tool wear surface/interface characteristics during the cutting of nickel-based superalloys by thermal barrier coating and thermal conductivity cubic boron nitride (CBN) cutting tools. To reveal the diffusion interface reaction layer microstructure and their effect on the tool performance, we proposed a method for analytical verification and quantitative identification of the interface reaction layer between tool and workpiece in metal cutting process. These findings can provide guideline significance and theoretical value for the in-depth understanding of the tool wear and interface diffusion mechanism.