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对Q235厚板出现的表面裂纹进行的检验确认裂纹源自于连铸板坯。进一步的检查表明，钢中硫化物等夹杂物及其偏析是造成铸坯表面裂纹及板材性能缺陷的主要原因。建议改善钢液清洁度和改进连铸工艺为解决途径。
Examination of the surface cracks appearing on the Q235 slab confirmed that the crack originated from the continuous slab. Further examination showed that inclusions such as sulfides in steel and their segregation are the main causes of slab surface cracks and sheet properties defects. Proposed to improve the cleanliness of molten steel and improve the continuous casting process as the solution.