摘要
本文利用中频热压烧结法制备了TiC-Ni、TiC-Ni-Mo和TiC-Ni-MO-WC3种高温自润滑性金属陶瓷材料。栓-盘摩擦磨损试验结果表明,TiC-Ni-Mo金属陶瓷的高温自润滑性最好,其在600℃时的摩擦系数为0.19,磨损率为1.14×10^(-14)m^3/N·m,偶件(材料W18Cr4V,HRC62)的磨损率为0.069×10^(-14)m^3/N·m。作者指出,这类材料的高温自润滑性与其摩擦表面上生成的氧化膜的组成和结构相关。此外,本文还就Mo、WC对材料物理机械性能的影响进行了探讨。
TiC-Ni, TiC-Ni-Mo and TiC-Ni-Mo-WC ceramets which have high temperature self-lubricating performences were prepared using intermediate frequency induction hot-press sintering. The results of pin on disk sliding tests indicated that the friction coefficient and wear rate of TiC-Ni-Mo ceramet are the lowest among three ceramets, when a high speed steel pin sliding against TiC-Ni-Mo disk at 600℃,the friction coefficient is 0.19,the wear rates of pin and disk are 1.14 × 10-14m3/N· m, 0.069 × 10-14 m3/N·m, respectively. The examination of ceramets by means of scanning electron microscope, X-ray diffraction,electron probe and differential thermal analysis indicated that the composition and structure of oxide films form on the sliding tracks of the ceramets have an important effect on the high temperature self-lubr icating behavior. The results shown that Mo improves the mechanical strength and tribolo-gical properties of ceramets and that WC has a positive effect on the mechanical properties and a negative effect on the tribological properties of ceramets.The different wear mechanisms of TiC-Ni and TiC-Ni-Mo were also investigated in this study.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
1992年第4期309-316,共8页
Tribology
关键词
金属陶瓷
润滑
氧化膜
磨损
TiC-Ni series ceramet, high temperature self-lubricating, surface oxide film, wear mechanism
