Judgment of Graphite Structure of Flake Graphite Cast Iron by Artificial Intelligence

Abstract

The graphite structure of flake graphite cast iron is classified into 5 types of A,B,C,D,E or 6 types including chill. In usually, type A is good quality and type D is poor quality. As the proportion of D-type graphite increases, the tensile strength decreases.

Inspection of graphite structure is one of the quality evaluations. However, there is no method for numerically determining the graphite structure of flake graphite cast iron. In this study, we created an AI that determines 6 types of graphite structure from A to chill using a Convolutional Neural Network (CNN).The created AI judged the graphite structure photographs that not used for learning with an average correct answer rate of 97.5%. In addition, when the graphite structure of one sample was analyzed by AI, it was confirmed numerically that the graphite structure deteriorated.