The Solution For The Casting Crack

The Casting Crack could be divided into two ways:the Hot Crack and the Cold Crack.Generally speaking,the Hot Crack would be caused by the S factor and would be scattered into irregular shape with the oxidized surface at the origin of the crack.And the Cold Crack is mainly caused by the P factor with a vertical shape and some metal light would be scattered around its origin of the Crack.Sometimes it would occur with a bit of the oxidized color.Some parts of the steel castings would be processed by the water explosive sand cleaning progress and it would be get harmed and left with the crack after this process.

The precaution to avoid the crack including:

1 improve the concession of the sand mould and the core in the process of manufacturing the casting material.

2 Be strict with the S and P infredients in the burden and molten steel material.

3 Be even with the casting wall thickness in order to avoid its sudden transformation and we could set the strengthening rib properly with the adoption of the fillet connection at the joint of the crosssection to lower down the stress concentration purpose.

4 Adjust the cooling speed of the casting parts in order to avoid the overheat at certain spot and keep a densener at the certain thick cross-section or the overheat knot,this would make the ingate scatter properly and the temperature of the casting would be more even with the shrinkage of casting would not be obstacled by the casting head.

5 Do not be early with the open form with the casting material after the pouring process.Be more aware of the temperature and the time if you adopt the water explosive sand cleaning process.