Effect of filling time on metallurgical properties of casting component / Nor Azri Jumiran

Casting is a fabrication process whereby totally molten metal is poured into a mould cavity having the desired shape upon solidification, the metal assumes the shape of the mould, but experiences some shrinkage. Casting technique are employed when the finished shape is so large or complicated that any other method would be impractical. The method has been used is a sand casting that probably the most common method, ordinary sand is used as the material. A two piece mold is formed by packing sand around a pattern that has a shape of the intended casting. The material has been used is ductile cast iron, a family of cast iron with a wide diversity of properties and, as their name implies, there are intended to be cast into desired shape rather than being worked in the solid state. Cast iron normally contains from about 2 to 4% Carbon and 1 to 3% Silicon. Other alloying metallic and nonmetallic element are added in order to control and vary specific properties. Besides chemical composition, other important factors which affect their properties are the solidification process, solidification rate and subsequence heat treatments. Cast iron makes excellent casting alloys have a wide range of strength and hardness, and in most cases easily to machine. In this study, for three different filling times was investigated. Mechanical characteristic have been carried out in order to correlate the effect of the filling time. It shows that from the study the mechanical properties will decrease due to longer filling time and the microstructure shown the ferrite and pearlite element of nodules ductile cast iron.