NUMERICAL SIMULATION OF A HEAT TREATMENT PROCESS OF 7055-SiCp COMPOSITES USING COMPUTATIONAL FLUID DYNAMICS

The purpose of this study is to explore the phase transformation and property change of 7055-SiCp composite in heat treatment process, and find out the method to improve the heat treatment process. With the help of the most commonly used commercial computational fluid dynamics (CFD) software in numerical simulation, a numerical simulation model describing the heat treatment process of 7055-SiCp composite is established. Moreover, the numerical simulation experiment of the change of the composite material in the heat treatment process is taken as the research object. CFD technology is used as a research tool. By means of numerical simulation and commercial software, a model describing the internal changes of heat treatment process of 7055-SiCp aluminum matrix composites is established to analyze the internal structure transformation, structure transformation and physical properties changes. The results show that there is a second phase aluminum copper Al2Cu in the composite matrix. In addition, the static recrystallization phenomenon and recrystallization structure appear during annealing and solution treatment of heat treatment process. Annealing at 300°C for 20h can significantly increase the elongation of the material by about 76%, but the tensile and compressive properties and yield strength of the material also decrease by 47% and 52%, respectively. The numerical simulation software is used to discretize the macro phase transformation problem to further optimize the heat treatment process. Through the simulation of material heat treatment, the advantages and disadvantages of the process are analyzed accurately, to achieve accurate control and improvement of the process. It has a strong application value for the optimization of material performance after heat treatment, and has great reference significance for the follow-up research work. © 2021, Cefin Publishing House. All rights reserved.