Estudio y caracterización de sistemas de moldeo fenólico-isocianato y furánico en diferentes arenas base aplicadas en fundición nodular

Abstract

This document presents test results for silica and corundum base metals casting sands. Standardized tests were carried out to understand physical and mechanical properties of the metal casting sands and molding mixtures prepared with these refractory bases: Grain distribution, grain size, grain shape classification, moisture content, pH, LOI, Weibull distribution tensile test, permeability and roughness are the properties that have been evaluated. Tensile, permeability and roughness tests were carried out with different molding mixtures changing base sand and Phenolic-isocyanate and Furanic binders. The results of the tensile test were adjusted to a Weibull distribution, Weibull modulus of each molding mixture and the strength to a probability of failure of 63% is obtained. The permeability and roughness results were subjected to ANOVA and T-Test and conclusions are presented.