Analysis of Cast Iron Solidification

The analysis of solidification in cast iron projects using MAGMASOFT® is performed through a series of results.

The Fraction Liquid, Hot Spot and Porosity results should always be used for better understanding of the solidification process. These results allows us to understand how solidification develops, identifying the moment when the feeding zones are separated and also identifying regions where there is liquid mass isolation, in the casting, during solidification.

MAGMASOFT® also allows the identification of the origin of a shrinkage porosity, that is, if it is primary (from the contraction of the metal during solidification) or secondary (due to the inability of the graphitic expansion to feed some product's regions). With this analysis, it is possible to devise appropriate strategies to solve both cases.

This evaluation relies on the progressive result of Porosity, which shows not only the moment of the appearance of shrinkage porosity, but also those that are compensated by the formation of graphite.

If the fraction liquid in the moment of porosity formation is high, we can conclude that the porosity is primary. Likewise, if the fraction liquid is low, we have a secondary porosity.

Figure 1: Identification of the porosity’s origin (primary or secondary) through the results of Porosity and Fraction Liquid

Figure 1: Identification of the porosity’s origin (primary or secondary) through the results of Porosity and Fraction Liquid

Simulation with MAGMASOFT® also allows us to predict the formation of a solid shell at the top of feeders, which compromises its behavior as it prevents atmospheric pressure from acting. This study, also performed by the Fraction Liquid result, allows us to understand the regions with the greatest tendency to shrink as well.

The evaluation of these solidification results in cast iron projects was explained by MAGMA Engenharia do Brasil in a webinar that took place on May 21, 2020.

If you are still not familiar with this functionality in MAGMASOFT®, or even if you are and seek to improve, do not miss the chance and watch our latest webinars!

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