研究了不同类型的显微组织的落锤撕裂性能，并从夹杂物百分比以及分布角度分析了夹杂物对落锤性能的影响，并给出了典型硅酸盐类夹杂和硫化物、氧化物夹杂的扫描照片，利用lapera试剂腐蚀出M/A岛的形貌，分析了M/A岛对落锤性能的影响，以及析出物位错、析出物的强化机制。
DWTT property with different microstructure were investigated, and analyzed the influence to DWTT from the aspect of percentage composition and size of inclusion, also the SEM pictures of typical silicate inclusions and sulfide, oxide inclusions were provided. From the pattern of M/A island corroded by lapare reagent, the influence of M/A to DWTT was analyzed，and also the strengthen mechanics of dislocation and precipitation was analyzed。
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