A New-type of Cermets Cutter with Nano-TiN Addition:Microstructure, Mechanical and Cutting Properties  

作　　者：刘宁 

机构地区：[1]Department of Materials Science and Engineering, Hefei University of Technology,Hefei 230009,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2006年第1期63-67,共5页武汉理工大学学报（材料科学英文版）

基　　金：Supported bythe National Natural Science Foundation of China ,the Natural Science Foundation of Anhui Province andthe Project ofKey Teachers of University of Ministry Education of China( No.50072003 , No.03044902 and No.GG-805-10359-1840)

摘　　要：The microstructure and mechanical properties of a new-type of cermets cutter （ tool A ） with nano- TiN modification and its cutting properties in cutting gray cast iron are investigated. SEM and TEM observatioas of the microstructure of the above material reveal that nano- TiN modified cermets possess a finer microstructare than conventional cermets. In the cutting tests, for comparison, cemented carbide cutter （ YG8, tool B） was also utilized. The cutting results show that the cutting properties of tool A are superior to those of tool B. It is also Jound that the predominant failare mode of tool A is normal wear and micro-spalling under lower cutting quantities, and that chipping occurs under higher cutting quanthies . SEM analysis reveals that cohesion, oxidation and diffusion wear become very apparent at a higher cutting speed. On the contrary, grain wear also exists but is not apparent.The microstructure and mechanical properties of a new-type of cermets cutter （ tool A ） with nano- TiN modification and its cutting properties in cutting gray cast iron are investigated. SEM and TEM observatioas of the microstructure of the above material reveal that nano- TiN modified cermets possess a finer microstructare than conventional cermets. In the cutting tests, for comparison, cemented carbide cutter （ YG8, tool B） was also utilized. The cutting results show that the cutting properties of tool A are superior to those of tool B. It is also Jound that the predominant failare mode of tool A is normal wear and micro-spalling under lower cutting quantities, and that chipping occurs under higher cutting quanthies . SEM analysis reveals that cohesion, oxidation and diffusion wear become very apparent at a higher cutting speed. On the contrary, grain wear also exists but is not apparent.

关 键 词：microstructare cermets nano- TiN ndditioas cutting properties failure mode 

分 类 号：TB383.1[一般工业技术—材料科学与工程]