Some More Defects such as
1.OverLap - Material is folded in the die.It is due to poor die design,poor roll design not cleaning of dies before forging.
2. Under filling - Other reasons are Less Raw material,Poor heating,Poor draft angle.
3. Crack - Due to improper core heating of the material.
May I know how frequent the following inspection should be carried out (by forging supplier) to assure the quality of the forged parts?
1. Grain flow
2. Yield Strength.
3. NDT (which type of NDT should be used?)
It is reasonable to perform 100% NDT check on forged parts?
Beside the dimension & visual inspection, what others inspection needed on forged parts?