Major defects in common castings

1. Stomatal, which is caused by too much water in the modeling material or contains a large number of air generating substances in China; The permeability of molding sand and core sand is poor. The pouring rate is too fast.

2. Trachoma, the cause of trachoma is insufficient strength of molding sand; Insufficient compactness of molding sand; The casting speed is too fast.

3. Shrinkage cavity is caused by poor feeding in the solidification process of casting.

4. Sticky sand, the reason for sticky sand is that the fire resistance of molding sand is poor or the temperature requirement of the pouring system is too high.

5, crack, crack casting wall thickness is caused by large differences; Improper setting of gating system, etc.

Hebei Qianlong Carbon Co., LTD., the main products are graphetized petroleum coke, calcined coke, graphite powder, coal calcined coke, graphite electrode pieces, column carburizer, graphite crucible, graphite electrode, etc. For more information, What's App: +86 18032220218 Email:[email protected]