63.3Mn14Si9.1Cr9.8C3.8)99.5?xCuxAg0.5 (x=1，2，3，4，5，at%)合金，并對合金試樣進行抗菌時效處理，研究Cu含量對合金耐腐蝕性能以及抗菌性能的影響。結果表明，經過固溶時效處理后的中熵合金均為fcc結構，隨著Cu含量的提高，fcc1富鐵基體上逐漸析出了富Cu和富Ag的fcc2相。合金在3.5%（質量分數(shù)）NaCl溶液中的耐腐蝕性能優(yōu)于AISI304。隨Cu含量的增加，腐蝕電流密度先減小而后增加，容抗弧半徑先增大后減小，表明合金的耐腐蝕性能先增強后減弱。合金在大腸桿菌懸浮液中的腐蝕速率呈現(xiàn)出先增大后減小的趨勢，x=2合金的耐生物腐蝕能力最優(yōu)，而抗菌性能和腐蝕性能存在倒置關系。富Cu和富Ag的fcc2相能有效提升合金的抗菌性能，x=5合金的抗菌性能最優(yōu)，抗菌率達到99.94%.;(Fe63.3Mn14Si9.1Cr9.8C3.8)99.5?xCuxAg0.5 (x=1, 2, 3, 4, 5, at%) alloys were prepared by water-cooled copper crucible magnetic levitation vacuum melting furnace. The effects of Cu contents on microstructure, corrosion resistance, and antibacterial performance of the alloys were investigated. The results show that the medium entropy alloys possess fcc phase after solid solution and aging treatment. With the increase in Cu content, the Cu-enriched and Ag-enriched fcc2 phase is precipitated on the fcc1 Fe-rich matrix. The corrosion resistance of the alloys in 3.5wt% NaCl solution is superior to that of AISI304. The corrosion current density first decreases and then increases, and the impedance arc radius first increases and then decreases, indicating an initial enhancement and subsequent weakening of the corrosion resistance as the Cu content increases. Moreover, the corrosion rate of the alloys in Escherichia coli suspension shows a trend of increasing first and then decreasing. When x=2 the alloy exhibits the best corrosion resistance, and there is a trade-off effect between the corrosion resistance and antibacterial performance. The fcc2 phase effectively enhances the antibacterial performance of the alloy, and the alloy of x=5 shows the optimal antibacterial rate of 99.94%."/>