Effect of Gating System Design on Microstructure &Grain Size for Al-Mg Alloys


The objective of this paper is to study gating system design effect onAl-5%Mgalloy Microstructure Measurement (By Jeffrece's Method) and freezing range,two sand mould were made with different gating systems Practicality (in Runnerlength & Runner depth) to study the effect on freezing ratio & Microstructure, aVBA Program was bulid because Most of result are stored in Microsoft Excel2007Spread Sheet in which Calculation of Grain size were performed for manyspecimens ,Results shown that the gating system with runner length 2.5 cm andtaper sprue gave better results than gating system with a 4cm runner's length andcylindrical sprue .