低温球铁件磁痕缺陷的工艺优化

Technology Optimization of Magnetic Mark Defect for Low Temperature Ductile Iron Casting

针对低温球铁铸件表面出现的磁痕缺陷,进行数值模拟分析和铸造工艺改进。结果表明,在保证铁液纯净度的前提下,优化铁液充型流场及充型压力分布,减少负压区,防止铁液充型过程中出现持续负压,保证铁液平稳充型,是消除低温球铁件磁痕缺陷的有效途径。

The magnetic marks defect was found on the surface of low temperature ductile iron castings during production.The simulation and improving process for ductile iron castings were put forward.The results show that under the premise of guarantee the purity of molten irons,the effective ways to eliminate magnetic marks defect of low temperature ductile iron include,optimization of melt iron filling mould flow field and the filling mould pressure distribution,reducing the negative pressure zone,preventing iron liquid filling mould process from continuous negative pressure,making sure the melt iron filling mould stable.