(北京科技大學(xué) 材料科學(xué)與工程學(xué)院，北京 100083)
摘 要: 利用高能球磨方法實(shí)現(xiàn)Fe和Al的合金化，制備出一種Al粉擴(kuò)散于Fe基體中的Fe-Al固溶粉末。利用該Fe-Al固溶粉末彌散強(qiáng)化Cu-10Sn合金，燒結(jié)過程中，F(xiàn)e-Al固溶粉末轉(zhuǎn)變?yōu)镕e3Al金屬間化合物。結(jié)果表明：與傳統(tǒng)Cu-10Sn合金滑動軸承材料相比，強(qiáng)化后的Cu-10Sn合金的硬度、壓潰強(qiáng)度和摩擦性能等明顯提高；當(dāng)Fe-Al固溶粉末含量為3%(質(zhì)量分?jǐn)?shù))時，Cu-10Sn合金的硬度和強(qiáng)度達(dá)到最佳，與基體合金相比分別提高了57%和127%，摩擦因數(shù)從0.38降低到0.27，磨損量從0.30%降低到0.07%。
關(guān)鍵字: 金屬間化合物；機(jī)械合金化；彌散強(qiáng)化；固溶；摩擦；磨損
（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
