摘要
基于扩散自润滑轴承对金属陶瓷烧结体的孔隙结构、孔隙度和力学性能要求,以TiC/Fe-Cr-W-Mo-V混合粉为基料,加入一定量的造孔剂和惰性弥散质点,利用真空烧结法研制出一种孔隙分布均匀,且互相连通成网络状的微细孔结构的金属陶瓷烧结体,并通过显微硬度计和液压式压力试验机分析了其力学性能,以扫描电子显微镜分析了材料的显微结构、孔径结构。结果表明制备TiC/Fe-Cr-W-Mo-V系微细孔金属陶瓷扩散自润滑烧结体时,添加3%的TiH2造孔剂,并以Al2O3为惰性弥散质点,于1230℃烧结,可使烧结体孔隙分布均匀且互相连通,显孔隙度在17%左右,满足扩散自润滑轴承对孔隙结构、尺寸和力学性能的要求。
For developing new self-lubricating bearings,a new cermet sinter with micro-porous of both uniform and connecting each other structure was developed by adding pore-forming materials and inserting dispersal particles into the TiC/Fe-Cr-W-Mo-V matrix material.The mechanical properties,microstructure and pore-shape are investigated by sclerometer,hydraulic pressure tester and SEM.The results show that by using Al 2O 3 as inert dispersal particles,adding 3% TiH 2 pore-forming agent,and sintering at 1 230 ℃,the new cermet sinter with uniform porous structure and 17% porous is developed,which meets the needs of porous structure,porous dimension and mechanics properties of the diffusing self-lubricating bearing.
出处
《轴承》
北大核心
2005年第5期20-23,共4页
Bearing
基金
国家自然科学基金资助项目(50275110)
