Analysis and Application of the Solidification Curves of a Low Carbon Low Alloy Steel in the Casting Process

Author of the article:WAN Jie 1 , LU Yanru 2 , CHEN Biao 1

Author's Workplace：1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China; 2. Department of Materials Science and Engineering, Missouri University of Science and Technology, Missouri Rolla 65401, USA

Key Words：analysisof solidification curve; newtonian analysis; fourier analysis; zero curve

Abstract：For decades, thermal analysis of alloy solidification, as a typical metal solidification research technique, has been
widely used in the process control of various alloy casting, such as assessing alloy composition, predicting alloy properties,
etc. This paper presents two typical methods of solidification curve analysis: Newtonian analysis and Fourier analysis for
the thermal analysis of material solidification processes. The calculation of the zero curve in both methods is described in
detail, and how to determine the solidification latent heat and the percent of solid phase using the zero curve and the first
differential curve of the solidification curve is explained. Finally, the calculation results of the two methods are compared
with the simulation results of commercial thermodynamic simulation software. The results show that the Fourier analysis
method is closer to the calculation results of the commercial software, and therefore, it has a wider application prospect in
the industrial solidification thermal analysis.