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螺旋桨是船舶动力系统上的一个极为重要的部件,它应具有强度高、韧性好、在承受交变应力和海水腐蚀的恶劣条件下,能接受主机传递的大功率,并保证安全运转和长的寿命。因此,作为螺旋桨材料的高锰铝青铜要具有良好的综合机械性能。目前,各国多采用综合机械性能良好的铜锰铝合金作为螺旋桨的材料,与国外相应的我国牌号是 ZQAl12—8—3—2,其化学成分与机械性能见表1。国产大型船舶的螺
Propeller is an extremely important part of marine power system, it should have high strength, good toughness, withstand the alternating stress and seawater corrosion under harsh conditions, to accept the host of high-power transmission and to ensure safe operation and long life. Therefore, high manganese aluminum bronze as a propeller material should have good overall mechanical properties. At present, all countries use copper-manganese alloy with good mechanical properties as propeller materials. The corresponding grade in our country is ZQAl12-8-3-2. The chemical composition and mechanical properties are shown in Table 1. Domestic large-scale ship screw