the Purpose of Gray Cast Iron Inoculation Treatment

Elderly people in the foundry industry clearly understand that the role of gray cast iron inoculation is very important. What is the purpose of such an important inoculation? OEM Castings Supplier will share with you in detail:

The mechanical properties of gray cast iron depend to a large extent on its microstructure. Gray cast iron that has not been inoculated has unstable microstructure, low mechanical properties, and white holes are prone to appear in the thin wall of the casting. In order to ensure the consistency of casting quality, inoculation treatment is essential.

Ferrosilicon Inoculant

The inoculant used in the inoculation treatment of gray cast iron is added in a small amount, which has little effect on the chemical composition of cast iron, but has a great effect on its microstructure, so it can improve the mechanical properties of gray cast iron and its physical properties are also obvious influences. Good inoculation treatment has the following effects:

1. Eliminate or reduce the tendency of white mouth;

2. Avoid cold tissue;

Ferrosilicon Inoculant

3. Reduce the wall thickness sensitivity of iron castings, so that the difference in microstructure between thin and thick sections of the casting is small, and the difference in hardness is also small;

4. Facilitate the nucleation of eutectic clusters and increase the number of eutectic clusters;

5. The form of graphite in cast iron is mainly fine and uniformly distributed A-type graphite, thereby improving the mechanical properties of cast iron.

Ferrosilicon inoculant 1-3mm

The cast iron with good inoculation has better fluidity, the shrinkage of the casting is reduced, the processing performance is improved, and the residual stress is reduced. The inoculation treatment effect of gray cast iron is still quite large. Casters should pay attention to it.

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