大型夹杂物主要来源于结晶器卷渣、氧化产物和中间包覆盖剂等。
Large inclusion come from mould fluxes, oxidation products, tundish covering flux and so on.
铸坯中的大型夹杂物在厚度方向分布不均匀，内弧含量要明显高于外弧含量。
The distribution of large-sized inclusions was non-homogeneous along thickness direction of slab, which contents of inner arc slab were obviously higher than those of outer arc slab.
用扫描电镜、大型金相显微镜观察分析高碳钢盘条的缩径，结果表明：造成缩径的主要原因是盘条中的非金属夹杂物超标、方坯偏析和缩孔。
The results showed that the major cause of reducing diameter was more non-metallic inclusion in the steel than standard value, billet segregation and shrinkage void.
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