53 - Effect of Pouring Conditions on Degenerated Graphite on the Cast Surface of Ductile Iron Castin

Abstract:

Effect of Pouring Conditions on Degenerated Graphite on the Cast Surface of Ductile Iron Castings

The effect of turbulence, filling velocity, solidification time, and metal flow were investigated on ductile iron wedge castings. Phenolic urethane bonded molds were prepared at UAB and the castings were produced at a commercial foundry. Simulations predicted that the bottom fill castings had lower turbulence and a longer fill time. The top fill casting had longer solidification times because of the large filling basin that sat above the riser during solidification. In addition, the solidification time increased from the bottom to the top of the wedges and from the surface to the interior of the wedges. In both gating designs, the overflow side of the casting had fresher metal striking it throughout the filling of the casting.