含锆夹杂物与基体间的缝隙，不是在轧制时形成的，而是在轧后由相变后的组织决定的：有铁素体等软质相组织的钢中，夹杂物与基体的缝隙较小；主要由板条等硬质相组成的钢中，夹杂物与基体的缝隙较大。对夹杂物形貌及尺寸观察后发现：直径大于5 μm的复合夹杂物，ZrO2是夹杂物的核心；直径小于3 μm复合夹杂物的核心则是ZrO，而TiO2、Al2O3、MnS等包围并依附着含锆氧化物析出并长大。
The fault between the impurities containing Zr and matrix is not formed during the rolling process but are depend on the microstructure after rolling. In the steel which contain soft phase ferrite, the fault between the impurities and matrix is small. If the main microstructure in steel is hard band shape phase, the faults size is large. After observing the morphology and size of impurities, it can be seen that the center of impurities is different with the size. When the diameters of impurities exceed 5 μm, ZrO2 particles are observed in the center. ZrO particles are observed in the center when the diameter of impurities is smaller than 3 μm. TiO2, Al2O3 and MnS are precipitated and grow around oxide of Zr particles.
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