摘要
采用湿型铸造生产球铁汽车后桥壳铸件,冒口颈根部出现显微缩松现象。利用华铸CAE软件进行工艺模拟,结果显示:冒口颈过早断开,导致铸件出现液相孤立区域,形成缩松缩孔。通过增大冒口和冒口径尺寸,保证了冒口径通道畅通,实现了冒口径的顺序凝固。用改进后的工艺进行了试制和小批量生产,铸件经解剖和X光探伤,均未发现有缩松缺陷。
The vehicle-used nodular iron real axle housing was cast with green sand mould and there was micro-shrinkage porosities defect found at the root area of the riser neck.Therefore,Huazhu CAE software was used to conduct casting process simulation.The result showed that the riser neck closed too earlier causing isolated liquid phase area in the casting and it became shrinkage porosity after solidified.By through enlarging diameter of both the riser and riser neck,the liquid channel of the riser neck was kept open so that the directional solidification was realized.After putting the improved casting method into trial and small batch production the casting was dissected and inspected with X-ray detection and no shrinkage defect was found.
出处
《现代铸铁》
CAS
2011年第5期77-79,共3页
Modern Cast Iron
关键词
球墨铸铁
汽车后桥壳
铸造工艺
CAE软件
nodular iron
vehicle-used rear axle housing
casting method
CAE software
