COMPARISON OF THE QUALITY CHARACTERISTICS OF AL-7%SI ALLOY CASTINGS PRODUCED BY V-PROCESS AND GREEN SAND MOLDING PROCESS

19940236
Journal: Indian Foundry Journal V 39 N 5 P 13-16 May 1993 (4 p)
Author: Kumar, P; Gaindhar, J L

While V-process castings have better dimensional accuracy and surface finish than green sand mold castings, other characteristics such as volume porosity, mechanical properties, solidification times, etc., are compared in this paper. Briefly, the superior dimensional accuracy of V-process was confirmed, porosities were higher in green sand molding, green sand molding produced higher tensile strengths and elongation, there was no difference in impact strengths, heat treatments showed higher property results with the green sand molded samples. Metallurgical reasons for the observed differences are offered.