铸坯表面裂纹的产生及后续的扩展,不仅对产品的最终质量有很大影响,而且在轧制过程中还会引起设备的损伤。本文详细介绍了铸坯表面裂纹的类型,并分析了各类型裂纹的形貌特征。同时,从有限元法、实验法、显微结构和数学法等方面阐述了国内外对裂纹演变研究的现状及前景展望。 Slab surface cracks and subsequent expansion, not only the final product quality has a great impact, but also in the rolling process can also cause damage to the equipment. In this paper, the types of surface cracks in slab are introduced in detail, and the morphological characteristics of various types of cracks are analyzed. At the same time, the current situation and prospects of the research on crack evolution at home and abroad are described from the aspects of finite element method, experimental method, microstructure and mathematical method.