【摘要】 GE构架为机车上的一个关键零件,服役时承受重载和频繁的冲击载荷作用.因而要求该件组织致密,不允许有缩孔,缩松和气孔等缺陷.本文先运用Pro/e软件对GE构架进行实物造型,然后利用MAGMAsoft软件对铸件充型和凝固过程进行模拟,预测铸件可能发生缩孔、缩松缺陷的位置,最后针对模拟结果进行铸造工艺优化改进并进行生产实验.实验结果表明,工艺改进后得到的铸件热节缺陷几乎消失了,缩松或缩孔缺陷也相应地减少.更多还原

【Abstract】 GE framework is a key part of locomotive,which bears the impact of heavy and frequent load during serving period.High quality of the casting is required,and the defects such as porosity and gas holes are not allowed.In this paper,Pro/e software is used for establishing the solid model firstly,then the MAGMAsoft software is applied for filling and solidification simulation.Meanwhile,the possible positions of shrinkage and porosity are predicted.Finally,the optimization of the casting process according to the simulation results is performed and the trial production is carried out.It was found that the hot spot defect almost disappeared,and the shrinkage and porosity decreased respectively.更多还原