《连铸方坯低倍组织缺陷评级图》标准浅析

Interpretation of 《Standard Diagrams for Macrostructure and Defect in Continuous Casting Billets》

介绍了连铸方坯低倍组织缺陷检验方法，对比分析了新旧行业标准YB／T4002—1991《连铸方坯低倍组织缺陷评级图》相关内容。本次标准修订，各章节都有不同程度的修改，主要增加白亮带、异金属夹杂物、翻皮、夹渣、白点缺陷和附录B连铸方坯低倍组织缺陷示意图等内容。

The ranking method of the macrostructure and defect in the continuous casting billetswas introduced in this paper. The difference was compared between the modified new edition and old one of this standard. Most sections of this standard were modified. New defects, such as white band, nonmetal inclusion, slay, white point, and new appendix B, which is the schematic diagrams of the macrostructure and defects in continuous casting billets, were added in the modified edition.