In order to further improve the corrosion resistance of brass, strength, hardness and machinability, etc., the zinc copper alloy added a few of tin, aluminum, manganese, iron, silicon, nickel, lead and other elements that constitute the ternary, quaternary, quinary alloy is called clutter brass, which is also called special brass. phase α and phase β are multiple messy solid solution in the special brass, and the strengthening effect is higher, while the phase α and phase β in common brass is brief CuZn solid solution, and the strengthening effect is lower. Although the zinc equivalent is appropriate, the properties of a multiple solid solution and a brief binary solid solution are different.Therefore, minority multiple strengthening is a way to enhance the function of alloy.
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