Regression Analysis of the Effect of Graphite Characteristics on Mechanical and Thermal Properties of Gray Cast Iron

The microstructure and properties of gray cast iron are closely related. For gray cast iron with pearlite matrix, adjusting graphite characteristics to improve casting performance is the most effective method. It is of great significance to analyze the relationship between graphite characteristics and properties of gray cast iron for the development of gray cast iron with high tensile strength and high thermal conductivity. Regression models of graphite characteristics and properties of gray cast iron was established, including tensile strength and thermal conductivity. By calculating the coefficients of the two models, the different effects of graphite characteristics on the properties of gray cast iron were obtained. By testing the regression models, the feasibility of the regression analysis method in the performance analysis of gray iron castings was determined. According to the analysis results, some improvement schemes are put forward to improve the performance of castings.