利用阳极泥法对CSP流程不同工艺参数下生产的汽车大梁板ZJ510L、集装箱板SPAH、普板ZJ330B三个钢种铸坯中的大型夹杂物进行了研究。发现尺寸350 μm以下的大多为圆球形状的SiAlCa类夹杂物，常规拉速47~50 m/min夹杂物尺寸一般在390 μm以下。连铸稳态生产情况下铸坯纵向大型夹杂物数量分布差异较大，水模型研究发现其原因是由于结晶器内“液面动态失稳”现象造成的。拉速越大夹杂物容易上浮的临界直径越大。
With anode slime method, the large inclusions in slab ZJ510L, SPAH and ZJ330 which were produced through a CSP process with different process parameters were studied. The results showed that inclusions (diameter was less than 350 μm) most were orbicular and composed of SiAlCa, and the size of discovered inclusions was smaller than 390 μm at conventional casting speed of 47~50 m/min. The distribution difference of large inclusion amount is great in casting direction even in a steady state production process, and water modeling study showed that the difference was caused by “meniscus dynamic distortion” phenomenon. The higher the casting speed, the bigger is the critical floating diameter.
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