GCr15SiMn钢超大圆坯凝固过程传热研究

Research on Heat Transfer During Solidification Process for Super-large Round Billet of GCr15SiMn

基于非稳态凝固传热模型,使用一种商业有限元软件ANSYS,对GCr15SiMn轴承钢超大圆坯整个连铸过程进行数值模拟研究,连铸工艺参数包括拉速、过热度、比水量和二冷区长度。结果表明,圆坯表面温度与液芯长度等计算数据与现场数据吻合良好,且现场连铸工艺参数改变时对大尺寸铸坯影响较大。

Based on unsteady state solidification and heat transfer mathematical model,the whole continuous casting process for super-large round billet of GCr15SiMn was simulated by using a commercial ANSYS finite element model.The technological parameters for continuous casting include withdraw speed,degree of superheat,specific water and the second cooling zone length.The results show that the calculated results such as the surface temperature and liquid core length are reasonably in accordance with the on-site test data.In addition,when the continuous casting process parameters were changed their effects on greater size super-large round billet are bigger.