STUDY OF CASTING DEFECTS AND THEIR REMEDIES – A REVIEW.

Casting is the one of the oldest manufacturing processes, and even today is the first step in manufacturing most product. In this process the material is first liquefied by proper heating and then this liquefied is poured into a previously prepared mould cavity where it is allowed to solidify and subsequently the product is taken out, cleaned and trimmed to the required shape. During this process there are different critical factors which is contributing in large amount to the defects. These factors are: 1. Design of casting and pattern 2. Moulding sand and design of mould and core. 3. Metal composition. 4. Melting and pouring. 5. Gating system.