铁型及覆砂层厚度对铸件凝固的影响

为解决球墨铸铁铸件冷却凝固的影响因素问题,将数值模拟技术应用到铸造过程分析中,讨论了铁型覆砂铸造工艺中40 mm、20 mm两种不同铁型,6 mm、8 mm、10 mm、13 mm四种覆砂层厚度对球墨铸铁铸件冷却凝固的影响,建立了铸造过程中铁型厚度、覆砂层厚度、铸件厚度三者之间的关系。进一步测量了实际球墨铸铁铸件的冷却凝固曲线,验证了模拟数据,得出了铁型覆砂工艺适合球墨铸铁铸件的工艺参数。研究结果表明,该研究对球墨铸铁铸造实际应用具有较为可靠的工艺参考价值。

Effect of thickness of iron mould and coated sand on solidification

In order to solve the problems of the solidification of ductile iron in iron mould coated sand,computer simulation was investigated. The thickness of iron mould was 40 mm and 20 mm,and the thickness of coated sand was 6 mm,8 mm, 10 mm and 13 mm. After the analysis of solidification, the relationship of iron mould, coated sand and casting was established. Also thermocouple was used to measure the solidification curve of practical casting, the reliability of the computer simulation was verified. The experimental results show that the process parameters of ductile iron in iron mould coated sand could provide a reference for practical application.