The use of ductile irons in thermo-mechanically loaded components is increasing, necessitating more knowledge of material properties at intermediate temperatures. A study of the mechanical properties of ductile irons at intermediate temperatures was conducted, investigating the effect of different pearlite fractions along with silicon content tests in fully ferritic microstructures. The effect of the pearlite fraction and silicon content on tensile and yield strength was measured at different temperatures, from room temperature to 450 °C. Models of tensile and yield strengths were developed based on those measurements. These resulting regression models were tested with data from the literature. Such models can be applied in various design tools, such as FEM calculations and in the optimisation of thermally and cyclic loaded ductile iron components.

球墨铸铁在热机械负载部件中的使用正在增加，因此需要更多地了解中温下的材料性能。对球墨铸铁在中温下的机械性能进行了研究，调查了不同珠光体部分的影响以及硅含量测试对全铁素体显微组织的影响。在室温至450°C的不同温度下，测量了珠光体含量和硅含量对拉伸强度和屈服强度的影响。基于这些测量，开发了抗张强度和屈服强度的模型。这些所得的回归模型用来自文献的数据进行了测试。此类模型可应用于各种设计工具，例如FEM计算以及热和循环负载球墨铸铁零件的优化。