Co-Cr-Mo alloys have been widely used in hip implants due to their good corrosion resistance and good wear resistance. However, complaint is still raising due to infection and inflammation. The addition of Cu has been proven to be an effective way to develop a new kind of Co-based alloy with good antibacterial properties. In this paper, the effect of heat treatment on the corrosion property, the tribology property and the antibacterial property of Cu containing Co-based alloys were investigated in detail. The microstructure observation showed that the as-cast alloys mainly consisted of a dendritic matrix with carbide dispersion at grain boundaries and a fine Cu-rich phase in the matrix and at the carbide/matrix interface. The carbide precipitates and the distribution of Cu phases affected significantly the friction coefficient and wear resistance of Co-xCu alloy. Annealing at 1060 °C/24 h promoted the precipitation of carbide and in turn increased the hardness and wear resistance markedly. Heat treatments, including annealing, solid solution and ageing treatment, enhanced the corrosion resistance of Co-xCu alloy without reduction in antibacterial properties. However, the addition of Cu increased the corrosion resistance and antibacterial properties but reduced the wear resistance especially at high Cu content.

中文翻译：

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热处理对抗菌Co-29Cr-6Mo-xCu合金的生物腐蚀性能和耐磨性的影响。

Co-Cr-Mo合金由于其良好的耐腐蚀性和良好的耐磨性而被广泛用于髋关节植入物。但是，由于感染和炎症，投诉仍在增加。已证明添加铜是开发具有良好抗菌性能的新型钴基合金的有效方法。本文详细研究了热处理对含铜钴基合金腐蚀性能，摩擦学性能和抗菌性能的影响。显微组织观察表明，铸态合金主要由在晶界处弥散有碳化物的树枝状基体和在基体中以及在碳化物/基体界面处的细富铜相组成。碳化物的析出和Cu相的分布显着影响了Co-xCu合金的摩擦系数和耐磨性。在1060°C / 24 h进行退火会促进碳化物的沉淀，进而显着提高硬度和耐磨性。热处理（包括退火，固溶和时效处理）在不降低抗菌性能的情况下提高了Co-xCu合金的耐腐蚀性。然而，添加铜增加了耐腐蚀性和抗菌性能，但是降低了耐磨性，特别是在高铜含量下。增强了Co-xCu合金的耐腐蚀性，而又不降低其抗菌性能。然而，添加铜增加了耐腐蚀性和抗菌性能，但是降低了耐磨性，特别是在高铜含量下。增强了Co-xCu合金的耐腐蚀性，而又不降低其抗菌性能。然而，添加铜增加了耐腐蚀性和抗菌性能，但是降低了耐磨性，特别是在高铜含量下。