根据中、后桥壳的结构及QT450-10的材质特征,采用铁型覆砂一型单件铸造工艺,并通过计算机模拟对该工艺进行分析和优化。结果证明,造型覆砂质量、铁液的化学成分、球化处理与孕育处理工艺、开箱时间等是获得合格铸件的关键;同时,铁型覆砂铸造生产线的设计必须结合产品的工艺的特点。 According to the structure of the middle and the rear axle shell and the material characteristics of QT450-10, a single-piece iron casting process with sand-covered sand was adopted, and the process was analyzed and optimized by computer simulation. The results show that the quality of coated sand, chemical composition of molten iron, spheroidization and inoculation process, out of the box time is the key to obtain qualified castings; the same time, the design of iron sand casting production line must be combined with the characteristics of the product process .