摘要
采用纳米TiN加入微米TiC混合粉末(A)和纳米TiC0．7N0．3固溶体粉末(B)两种配料,用无压烧结方法制备了A和B两种金属陶瓷材料及其相应刀具,对材料的组织和刀具的切削性能进行了研究。结果表明:A陶瓷相由黑色的芯和灰色的壳构成;而B陶瓷相兼有黑白两种芯和灰色的壳结构。分布于陶瓷相晶界处的纳米颗粒具有增强陶瓷基体的作用。在相同切削条件下,刀具A的切削性能比刀具B更好;高速切削时,氧化和扩散磨损加速了刀具的失效进程。
Two kinds of cermets （cermet A and B） and their cutters （Tool A and B）, were sintered by TiC rnicronpowders with TiN nanoparticles and TiCo, 7 No, 3 solution nanopowders under pressureless condition. The study of rnicrostructures and cutting tests showed that ceramic phases of A had black cores surrounded by grey rims, while B exhibited black and white cores with grey rims. TiN nanoparticles distributed among ceramic grainboundaries can improve strength of ceramic matrix. Tool A behaved higher cutting performances in comparison with Tool B at the same cutting conditions. Oxidation and diffusion wears accelerated failing progress of cermet cutters at higher cutting speeds.
出处
《机械工程材料》
CAS
CSCD
北大核心
2006年第11期21-24,28,共5页
Materials For Mechanical Engineering
作者简介
韩成良（1978-），男，安徽合肥人，讲师，硕士。
