球墨铸铁芯轴铸件无冒口铸造工艺设计

Casting Process Design of Nodular Cast Iron Mandrel without Riser

为解决小模数球墨铸铁芯轴铸件的内部收缩缺陷,改变传统的工艺设计思想,人为地加大铸件质量周界商,通过实际生产试验,成功确定了无冒口铸造工艺方案。该工艺方案出品率大大提高,生产成本大大降低,解剖铸件后检查内部无任何收缩缺陷,从而证明小模数球墨铸铁件也可以实现无冒口铸造。

In order to solve the internal shrinkage defects of the head mandrel of small modulus ductile cast iron,the traditional process design idea was changed,and the casting perimetrischem quotient was increased artificially.Through practical production test,the process scheme of riserless casting was determined successfully.The production rate of the process is greatly increased and the production cost is greatly reduced.After dissecting the casting,it was found that there were no shrinkage defects in it,which proved that small modulus ductile iron could be cast without riser.