中文摘要：

采用粉末冶金压制烧结工艺制备了含铜量不同的高硼铁基自润滑轴承复合材料,并在HDM20型端面摩擦磨损试验机上对其进行了验证试验,利用X射线衍射仪、扫描电镜和能谱分析仪分析了铜对高硼铁基烧结轴承材料组织结构、摩擦磨损特性的影响及作用机理。结果表明：铁基烧结轴承材料内部形成的硼化物会使基体结合强度变差,劣化其力学及摩擦学特性;而铜能在高硼铁基复合材料中形成合金相,起到＂黏结＂作用,铜的质量分数为20%时材料内部组织的结合强度、密度及硬度协调适宜,综合摩擦学性能优良。

英文摘要：

The high -boron iron based self- lubricating bearing composites with different contents of copper are prepared by using powder metallurgy press - sinter process, and the verification tests are carried out on end - face tribo - meter HDM20. The influence of Cu on microstructure, friction and wear behaviors of high - boron iron based sinter bearing materials are analyzed by using X - ray diffractometer , SEM and EDS. The results show that the boride forming worsens the bonding strength of substrate and degrade mechanics and tribology properties. The copper forms alloy phase and plays the role of ＂binder＂. The bonding strength, density and hardness of inner structure of composites coordinate appropriately when mass fraction of copper is 20% , which lead to excellent trihological properties.