x ray casting inspection - 1 views
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seamarkzm on 20 Sep 24The appearance of the crack is a straight or irregular curve. The surface of the hot crack is strongly oxidized and becomes dark grey or black without metallic lustres. The surface of the cold crack is clean with metallic lustres. Usually, external cracks can be seen directly in x ray casting inspection machine castings, but internal cracks can only be seen by other means. Cracks are usually associated with defects such as shrinkage porosity and slag entrapment. They are mainly found in the interior of the casting sharp corners, the junction of thick and thin walls and the hot connection area where the pouring riser is connected to the casting.