大型铸钢圆筒件的铸造工艺模拟与优化

Numerical Simulation and Optimization of Casting Process for Large Cast-steel Cylinder

采用铸造模拟软件ViewCast对大型铸钢圆筒件初始工艺方案的凝固过程进行了模拟。结果表明,在铸件厚大部位靠近内浇道部位出现了缩松、缩孔缺陷。原因是冒口和此区域之间的部位冷却速度快,过早阻断了凝固过程中的补缩通道,减小了补缩距离。在初始工艺的基础上,通过施加发热材料的方法,进行铸造工艺改进,实现了冒口对孤立液相区的圆满补缩,减少了缩孔、缩松的倾向,获得了致密的铸件。

The numerical simulation software View Cast was applied to analyze the solidification process of initial process for large cast-steel cylinder.The simulated results show that shrinkage is found in the thick and large position around ingate,because the position between the riser and the region cools so fast that the feeding passage of the region is blocked during solidification,which increased the possibility of the formation of shrinkage.The casting process is improved by applying heating material,so the shrinkage is reduced,which make the feeding effects from the riser to the isolated liquid region realize.