Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
DESIGN OF THE FILLING AND FEEDING SYSTEM OF GRAY CAST IRON PARTS THROUGH NUMERICAL SIMULATION
Submission Author:
Carlos Enrique Niño , SC
Co-Authors:
Thayse Francielle Peralta, Carlos Enrique Niño, Cleimar Del monego Ferreira
Presenter: Thayse Francielle Peralta
doi://10.26678/ABCM.COBEM2023.COB2023-2389
Abstract
Defects are a common problem in casting parts due to the multiple mechanisms and many process variables that can cause them. Gray cast irons are susceptible to most of the most common defects of this type of process, some of them being the cold shut defects and misruns, which usually occur in part sections with large areas and thin walls, due to the loss of temperature and filling pressure of the liquid metal. These defects are strongly related to the adopted feeding system and can be avoided by changing the geometry of the attack channels. With technological advances and the development of numerical simulation software, it is possible to predict the metal behavior during filling and solidification in the casting process, which enables the design of optimized filling and feeding systems. This work, performed in a metallurgical company in Santa Catarina, analyzed defects in a grey cast iron FC-200 product obtained by the PUNB (Phenolic Urethane No Bake) molding process, aiming to identify the causes and propose solutions for the problems. With the aid of MAGMA casting software, the temperature and velocity distributions of the metal during the filling of the part were analyzed in order to obtain solutions to avoid defects. A first version of the mold design was simulated, and based on the observed results, two other versions in sequence were too until solving the filling and feeding system and avoiding the defects, as verified through the application of the proposals in the manufacturing of test parts submitted to analyses.
Keywords
Cast Gray Iron, Cold shut, Casting mold design
