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Dicontinuities - Casting defects


Figure 1: Body cracks.

Defect name: Dicontinuities
Record No.: 740
Type of defect (Internal/Surface): Internal, surface
Defect classification: Casting defects
Steel name: Steel
Steel composition in weight %: No data.
Note:  Hot cracking. A crack often scarcely visible because the casting in general has not separated into fragments. The fracture surfaces may be discolored because of oxidation. The design of the casting is such that the crack would not be expected to result from constraints during cooling.
Possible causes
Damage to the casting while hot due to rough handling or excessive temperature at shakeout.
Remedies
Care in shakeout and in handling the casting while it is still hot; Sufficient cooling of the casting in the mold.
Reference: Not shown in this demonstration version.