Development of a material model for gas generation in inorganic foundry sands

更严格的法律要求和相关的环保生产需要导致在轻金属铸件中越来越多地使用无机砂而不是有机结合的铸造砂。然而，到目前为止，对无机铸造砂中气体的产生过程还没有进一步的研究，这就导致了铸件中的气孔问题。因此，在本项目中，将研究无机铸造砂的材料性质与铸造过程中气体生成之间的关系。首先，对无机铸造砂的相关特征值进行实验研究，确定其对瓦斯生成的影响。随后，将在获得的数据的基础上建立元模型，用于模拟无机铸造砂中的气体生成。最后，利用等效铸造实验的测量结果对模拟结果进行了验证。

Stricter legal requirements and the associated need for eco-friendly production have led to the increasing use of inorganic instead of organically bound foundry sands in light metal casting. However, the processes of gas generation in inorganic foundry sands have not been further investigated so far, which currently leads to problems regarding gas porosity in castings. In this project, therefore, the relationship between the material properties of inorganic foundry sands and the gas generation during casting will be examined. Initially, relevant characteristic values of inorganic foundry sands will be investigated experimentally and their influence on the gas generation will be determined. Subsequently, a metamodel will be developed on the basis of the data obtained, which can be used to simulate the gas generation in inorganic foundry sands. Finally, the results of the simulations are validated using measurements from equivalent casting experiments.