高碳钢连铸坯加热脱碳的有限元模拟  

Finite Element Simulation on Decarburization of Concasting Billet of High Carbon Steel during Reheating

作　　者：黄灿[1] 杭乃勤[1] 张细菊[1] 刘丹[1] 熊建良[2] 董素梅[2] 欧阳标[2] 

机构地区：[1]武汉科技大学材料与冶金学院,武汉430081 [2]武汉钢铁(集团)公司,武汉430083

出　　处：《特殊钢》2005年第5期19-22,共4页Special Steel

摘　　要：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 during heating of 250mm×280mm×6 000 mm concasting billet of 0.72C-1.30Mn high carbon steel U71Mn has been carried out and by non-linear regression analysis, the mathematical model for relation between deearbufizafion depth d （mm） of steel billet with deearburizafion depth do （mm） before reheating, surfaee temperature T （K） of billet and reheating time： d = d0 ＋ （2.132 × 10^-7 T^2 - 0.000 2 T ＋ 0.016 3）· （0.208√t - d0 ） is obtained. The measured results showed that the relative prediction error was ≤3.2%. Based on calculation by the model, it is obtained that the optimum reheating procedure is 1 150 ℃ for 86 rain at preheating zone, 1 250 ℃ for 131 min at heating zone and 1 230 ℃ for 68 nain at soaking zone. The examination results showed that using optimum reheating procedure the decarburization of products decreased about 20%.

关 键 词：有限元模拟 铸坯 温度分布 脱碳深度 预报模型 加热时间 连铸坯 高碳钢 非线性回归分析 数学模型 

分 类 号：TF777[冶金工程—钢铁冶金]