论文部分内容阅读
为了耦合缩孔和疏松模拟凝固过程三维微观组织,对元胞自动机--有限元(CAFE)法的物理本质和数值计算方法进行了分析,采用CAFE法对易切削钢9SMn28铸件进行了凝固过程、缩孔和疏松及三维微观组织的模拟.模拟结果表明:在空冷条件下,铸件表层的凝固是在连续降温过程中进行的,内部是先等温凝固,后降温凝固;缩孔和疏松模拟结果与实际铸件的基本相符;实现了9SMn28合金三维微观组织的模拟,模拟结果与实验吻合较好.
In order to couple the shrinkage cavity and loosely simulate the three-dimensional microstructure of the solidification process, the physical properties of the CAE method and the numerical calculation method were analyzed. The free-cutting steel 9SMn28 castings were solidified by CAFE method , Shrinkage cavity and looseness and three-dimensional microstructure were simulated.The simulation results show that under the condition of air cooling, the solidification of casting surface layer is carried out in the process of continuous cooling, the interior is first isothermal solidification, after cooling solidification; shrinkage and loose simulation results Which is consistent with the actual castings. The simulation of the three-dimensional microstructure of 9SMn28 alloy has been realized. The simulation results are in good agreement with the experiment.