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.
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;
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.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.
ABOUT KEVA
Keva Casting is a professional casting company that focuses on Construction, Machinery, Automobile, Hardware, Pipeline and many other industries.
We provide top quality products with the best service based on our complete production chain including our own mold design, advanced production techniques, and full management of the supply chain. Keva Casting has two factories located in Zhucheng, China's Shandong province.
We use "shell molding", which is a new technique that has been developed in recent years.This new technique has simplified production procedures and reduced air pollution compared with traditional sand casting and investment casting. Shell making and core making are faster to ensure production in enormous quantities. The dimensions and surface finishing are satisfactory for all kinds of industrial requirements. Besides supplying our own formwork & scaffolding systems, our casting products also supply OEM services in various industries.