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Effect of Process Parameters on the Surface Roughness of A713 Alloy Castings produced by Investment casting process

In the present work, an attempt has been made to investigate the effect of various process parameters on the surface roughness of A713 aluminum alloy. Experiments were conducted with different process parameters like wax composition, binders, firing temperature and the pouring temperature by varying their levels. In each case the surface roughness of aluminum alloy was determined. The experimental data obtained were used to optimize the value of the process parameters retaining minimum surface roughness. The effect of varying levels of the aforesaid process parameters on the surface roughness was investigated. Taguchi method was used to optimize the required composition of the waxes. Percentage contribution and the optimized values of the process parameters have also been deduced out by ANOVA approach applied to Taguchi method. The wax composition has the major contribution and the influence of binder used is insignificant.