基于连铸坯在结晶器的传热特性与热流实测值,建立了连铸动态二维耦合模型,对铸坯在结晶器的温度场和应力场进行耦合计算.通过计算结果得到结晶器内铸坯坯壳生长及收缩、应力应变分布情况等,并对铸坯在不同拉速下的收缩和应力分布做了比较.结果表明,当拉速增大时,在结晶器同一位置的铸坯表面温度增大,出结晶器坯壳厚度减薄.同时,结晶器保护渣的选择和控制方面对连铸坯质量的影响做了相关分析,适当控制铸坯在结晶器内的温降速率及保护渣选配对预防早期裂纹形成有十分重要的意义. Based on the heat transfer characteristics and the measured values ​​of heat flow in continuous casting mold, a two-dimensional coupled dynamic model of continuous casting was established and the temperature field and stress field in the mold were coupled and calculated. The growth and shrinkage of the billet shell, the distribution of stress and strain, etc. The shrinkage and stress distribution of the billet at different speeds were compared.The results show that when the casting speed increases, the surface of the slab at the same position of the mold The temperature increases, the crystallizer shell thickness thinning.Meanwhile, mold powder selection and control aspects of the quality of continuous casting slabs made a relevant analysis, the appropriate control of the slab in the mold temperature drop rate and protection Slag matching to prevent the formation of early cracks have a very important significance.