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This paper 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 are 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 at a probability of failure of 63% is obtained. The permeability and roughness results were subjected to ANOVA and t-test. Regular grains contributes to increase strength of molding mixture while permeability is not affected by time and amount of binder.

Characterization of No-Bake Phenolic-Isocyanate and Furanic Binders in Different Base Metal Casting Sands