Integration of casting process and microstructure modelling in an industrial nodular iron casting by computer simulation

摘要

The paper aims to demonstrate the capability of simulation simulation today and to study the complex phenomena in the casting process which affect the microstructure formed at solidification and solid state transformations. Temperature measurements were performed in a wheel hub in an industrial production line. The results were used in the validation of the simulation. The simulation will include mould filling, different orientation nof the casting in the mould, with and without feeder, influence of inoculation treatment and fading, microstructure development, and the related mechanical properties. The microstructure development will include primary precipitation of austenite, eutectic grey and white solidification, segregation of elements and chage of equilibrium temperautre for both the stable and metastable systems as well as ferrite and perarlite growth. The hardness of each phase depends on the chemical composition. Other properties as e.g. ultimate tensile strength, yield strength and ultimate deformation may also be calulated.