(北京科技大学 材料科学与工程学院，北京 100083)
摘 要: 利用高能球磨方法实现Fe和Al的合金化，制备出一种Al粉扩散于Fe基体中的Fe-Al固溶粉末。利用该Fe-Al固溶粉末弥散强化Cu-10Sn合金，烧结过程中，Fe-Al固溶粉末转变为Fe3Al金属间化合物。结果表明：与传统Cu-10Sn合金滑动轴承材料相比，强化后的Cu-10Sn合金的硬度、压溃强度和摩擦性能等明显提高；当Fe-Al固溶粉末含量为3%(质量分数)时，Cu-10Sn合金的硬度和强度达到最佳，与基体合金相比分别提高了57%和127%，摩擦因数从0.38降低到0.27，磨损量从0.30%降低到0.07%。
关键字: 金属间化合物；机械合金化；弥散强化；固溶；摩擦；磨损
（School of Material Science and Engineering, University Science and Technology Beijing, Beijing 100083, China）
Abstract:The Fe-Al solid solution powder of Al diffused in the Fe matrix was prepared by high energy ball milling. Alloy of tin-bronze was dispersion strengthened by Fe-Al solid solution powder. Fe-Al solid solution powder changes into Fe3Al intermetallic during sintering process. The results show that the hardness, crushing strength and friction performance of strengthened alloys are significantly improved, compared with the traditional tin-bronze. The optimum content of the solid-solution powder is 3% (mass fraction), the hardness and strength of alloys are best, which increase by 57% and 127%, respectively, the friction coefficient decreases from 0.38 to 0.27, the wear less decreases from 0.30% to 0.07%.
Key words: intermetallic; mechanical alloying; dispersion strengthening; solid solution; friction; wear
