不同碳氮比的金属陶瓷刀具高速切削镍基高温合金试验研究

Experimental Study on High-speed Cutting Against Nickel-based Super-alloys with Cermet Tools of Different Carbon-to-Nitrogen Ratios

摘要: 采用粉末冶金制备金属陶瓷,改变了碳氮的含量比,对镍基高温合金（GH4169）进行高速干切削试验。从后刀面磨损量、刀具磨损情况和切削力等方面研究了金属陶瓷刀具加工GH4169镍基高温合金的切削性能。通过扫描电子显微镜（SEM）和能量分散光谱（EDS）扫描分析,研究了不同碳氮比的金属陶瓷刀具切削镍基高温合金的磨损机理。结果表明,当金属陶瓷TiC∶TiN=7∶3（wt%）时,能表现出最好的基体力学性能,在切削参数V_c=100 m/min、a_p=0.5 mm、f=0.10 mm/r下切削性能相对最好。

Abstract: The high-speed dry cutting test of nickel-based superalloy（GH4169） was carried out with cermets designed by independent components of different carbon-to-nitrogen ratios. The cutting performance of cermets tools for processing GH4169 nickel-based superalloys was analyzed from the aspects of flank wear, flank wear and cutting force. Through scanning electron microscope（SEM） and energy dispersive spectroscopy（EDS） scanning analysis, the wear mechanism of cermets blades with different carbon-to-nitrogen ratios for cutting nickel-based super-alloys was studied. The results show that when TiC∶TiN=7∶3 is in cermets, the substrate performance and cutting performance in the case of V_c=100 m/min, a_p=0.5 mm and f=0.10 mm/r are best.