Axial shrinkage - Casting defects

Axial shrinkage - Casting defects

Figure 1: Axial shrinkage.

Defect name: Axial shrinkage
Record No.: 45
Type of defect (Internal/Surface): Internal
Defect classification: Casting defects
Steel name: Cast iron
Steel composition in weight %: No data.
Note: Upon x-ray, you observe a cavity in the middle of your casting.
Axial Shrinkage—All metal shrinks as it solidifies. Axial (or centerline) shrinkage, most often plate-like in shape, occurs when the metal at the center of the casting takes longer to freeze than the metal surrounding it. The defect is partly a function of the section thickness designed into the casting, but it also can be influenced by the metalcaster’s pouring temperature, alloy purity, riser use and pouring speed.
Reference: Not shown in this demonstration version.