进行了0.72%C-1.30%MnU71Mn高碳钢250mm×280mm×6000mm连铸坯加热时的传热有限元模拟和通过非线性回归分析,得出钢坯在加热后钢坯脱碳深度d(mm)与加热前脱碳深度d0(mm)、钢坯表面温度T(K)和加热时间t(min)之间关系的数学模型:d=d0+(2.132×10-7T2-0.0002T+0.0163)·(0.208t-d0)。实测结果表明,模型的相对预报误差≤3.2%。根据模型计算得出铸坯的优化工艺为预热段1150℃86min,加热段1250℃131min,均热段1230℃68min。检验结果表明,采用优化工艺,成品脱碳深度可降低20%左右。 The finite element simulation of heat transfer in continuous casting of 0.72% C-1.30% MnU71Mn high carbon steel 250mm × 280mm × 6000mm was carried out and the nonlinear regression analysis was carried out to get the billet depth d D0 + (2.132 × 10-7T2-0.0002T + 0.0163) · (0.208t), the depth of decarburization before heating d0 (mm), the surface temperature of the billet T (K) and the heating time t -d0). The measured results show that the relative error of the model is ≤3.2%. According to the model, the optimized process of slab is 1150 ℃ for 86min, 1250 ℃ for 131min, and 1230 ℃ for soaking for 72min. Test results show that the use of optimized technology, finished product decarburization depth can be reduced by about 20%.