Abstract
The resistance of cast irons to destruction is largely determined by the shape of graphite inclusions, the size of graphite inclusions, the number of graphite inclusions, and the nature of the distribution of graphite inclusions. Studies of the stress-strain state, performed on models of gray and modified cast iron for bending, allow us to evaluate the advantages and disadvantages of the obtained structure and shape of graphite inclusions. The application of the method of mathematical statistics with obtaining an empirical dependence of the influence of the structure and form of the graphite inclusion of cast iron on the durability of the molds will allow optimizing the chemical composition of cast iron and increasing the number of fillings. The use of the method of analytical statistics in research, such as correlation analysis performed on physical models of cast iron, established the correlation dependence of the influence of the structure and shape of graphite inclusions of cast iron in steel casting molds on their durability.
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