目前,我国渔船用螺旋桨大多采用zHMn55-3-1锰黄铜制造,其化学成分和机械性能列于表1,金相组织为α+β+Fe,见图1。图中白色块、针状为α固溶体,均匀分布的小颗粒状为Fe相,黑色为β相基体。α固溶体属面心立方晶格,性软,塑性好;β相属 At present, most of China’s fishing boats propellers are made of zHMn55-3-1 manganese brass, the chemical composition and mechanical properties are shown in Table 1, the microstructure of α + β + Fe, shown in Figure 1. Figure white block, acicular solid solution α, uniformly distributed small particles of Fe phase, black for the β-phase matrix. α solid solution is a face-centered cubic lattice, soft, good plasticity; β-phase