对梅钢2号板坯连铸机低碳钢浇铸的质量问题进行了调研，并采用低倍、硫印、显微金相分析、扫描电镜、能谱及全氧量分析等多种手段，研究了不同浇铸条件下铸坯质量缺陷与工艺条件的关系。研究结果表明非稳态铸坯质量明显低于稳态铸坯质量。同时，未观察到由结晶器卷渣形成的大型夹杂，铸坯的缺陷主要为气孔、Al2O3及复合铝酸盐夹杂。全氧分析表明，铸坯w(T［O］)平均为20.86×10-6，且最大值不超过27.00×10-6，相同工艺条件下，该板坯质量处于较高水平。
The quality of low carbon steel slabs cast on No.2 slab caster at Meishan Steel was investigated. In order to study the relationship between casting conditions and defects,macrostructure, sulfur print were observed and microstructure was studied by metallographic microscope (MM), scanning electron microscopy (SEM), energy dispersive spectrum (EDS) and total oxygen was analysed for the samples. The results showed that the quality of slabs cast under unsteady conditions is poorer than that cast under steady conditions. At the same time, the large inclusions caused by mold slag entrapping were not found, and the main defects were caused by pinholes, Al2O3 and complex aluminate. The T［O］ analysis indicated that,mean total oxygen content of slabs was 20.86×10-6, and the maximum was less than 27.00×10-6. So, the quality slab is at a comparatively high level comparing with the slabs cast under similar conditions.
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