Manganese brass bushing (C86300)

Manganese brass has excellent mechanical properties, casting properties, cutting performance and low cost, and has become one of the main manufacturing materials for propellers. In addition to manufacturing propellers, manganese brass can also be used to manufacture automotive synchronizer ring gears, bearing sleeves, gears, condensers, gate valves, etc. However, in polluted seawater, manganese brass will undergo de-zinc corrosion, and its resistance to cavitation corrosion is also poor, causing the manganese brass propeller to be prone to corrosion fatigue fracture. The copper-zirconium binary phase diagram shows that when zirconium is added to the manganese brass, the Cu5Zr or Cu3Zr strengthening phase will be precipitated first, which serves as the subsequent nucleation point and plays a role of fine-grain strengthening. A new type of zirconium microalloyed manganese brass was developed, and its hardness, microstructure, uniform corrosion performance, electrochemical corrosion performance, friction performance and mechanical properties were tested and analyzed.