Estudio paramétrico del proceso de colado centrífugo horizontal para la obtención de tubos de aluminio sin costura

Abstract

The aim of this work is to find the ideal parameters for the operation of the horizontal centrifugal casting machine of the Foundry Laboratory of the Escuela Politécnica Nacional that allows the production of seamless aluminum tubes, for reducing the casting defects that are presented in the process and thus improving the quality of the product. The rotation speed of the mold, the temperature of preheating of the mold and the temperature of casting were the three parameters of study. Five tubes were manufactured by varying each of these parameters, obtaining fifteen tubes. After the tubes were obtained, porosity analysis, roughness measurement, tensile test, and additionally the spectrometric analysis was performed. The porosity was determined with the relative density analysis, the roughness was measured with a digital rugosimeter, the mechanical properties were obtained with the tensile test based on Standard ASTM E8, and the chemical composition of the tubes was performed with spectrometric analysis. Evaluating the fifteen tubes obtained with respect to surface roughness, surface defects, porosity and tensile strength, it is concluded that the optimal parameters of the process of obtaining seamless aluminum tubes from the horizontal centrifugal casting machine corresponds to the obtaining parameters of the tube number 6 which are: 1198 RPM of rotation speed of the mold, 165 ° C of preheating temperature of the mold and 801 ° C. of casting temperature.