一、前言连铸坯质量特征是和其工艺及凝固特点紧密相连。由于其凝固壳是在强度很小的高温状态下被强制冷却的同时,不断受到拉坯作用。这将导致铸坯易产生裂纹等缺陷。裂纹的成因,为铸坯受到的应力超过金属本身的强度时,而被拉裂形成裂纹。在连铸过程铸坯受到的应力来源。不外乎由机械,乍用产生的机械应力;由坯壳内外温差引起 I. Preface The quality characteristics of continuous casting billet are closely linked with the characteristics of its technology and solidification. Due to its solidified shell is forced to cool under the condition of low temperature and high strength, it is continuously subjected to the pre-basting effect. This will lead to cracks and other defects easily slab. The cause of the crack is that when the stress on the slab exceeds the strength of the metal itself, it is cracked and cracked. Casting process in the casting process by the source of stress. Nothing more than by machinery, at first used mechanical stress; caused by the temperature difference between inside and outside the shell