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Simple simulations of solidification of metals and alloys generally provide results for determining the temperature distribut ion in a given time or solidification time for the specific locations of the casting. These data allow to unambiguously determine the position of thermal centers. However, knowledge about the location of thermal centers is not synonymous with the information about the location of any shrinkage defects in the casting, because the physical behaviour of molten metal should be still considered. This paper presents authors’ own method of predicting the formation of shrinkage defects in the castings, basing on solidification simulation results, taking into account the basic rulesof behaviour of the molten metal. The effectiveness of the method has been tested on the basis of example simulations performed for the flat shape of the casting inlet systems. The advantage of the method is that it requires little additional computational effort. The article is summarized by conclusions reached on the basis of simulations, as well as the program for further work containing possible improvements of the algorithm. |
