连铸坯凝固组织和缺陷的冷酸蚀法宏观检验

Macroscopic Examination on Solidification Structure and Defect of Continuously Cast Steel by Cold Acid Etching

叙述了冷酸蚀法较硫印和热酸蚀低倍检验方法的优越性 ,冷酸蚀法不但能够显示连铸坯的内部缺陷 ,而且也能够提供连铸坯凝固组织的信息。它可对连铸坯的内部缺陷原样 (尺寸 )地显示。同时 ,提出了按冷酸蚀法对现行标准进行修改的意见。

Advantages the cold acid etching process possesses in comparison with the conventional hot acid etching and sulphur print are described. Practical operation results indicate that this process can not only display the inner defects in original size in the continuously cast steel, but also provide information about the solidification structure of the steel. At the same time the proposals necessary for updating the current standards are put forward in the present paper.