the applications of casting inoculant in casting industry
Inoculant as unique ferro alloy product has wide applications not only in the steel making industry but also in the casting industry. Inoculant is very popular by steel factories and casting factories, the inoculant with the excellent performance and low price is the main reason. In addition, inoculant is an ideal choice for many casting factories, which can reduce production cost.
What is the casting inoculant? In the smelting production of casting molds, substances which can promote heterogeneous nucleation are intentionally added to the liquid alloy, as a result the number of crystal nuclei is greatly increased in order to obtain a fine grain structure. This method is called inoculation treatment that is artificially utilizing heterogeneous nucleation of refine grains. And the substance added to refine grains is called a casting inoculant.
What is the applications of casting inoculant? The inoculation process of the casting mold is the most commonly used way for refining the casting grains in the casting production. Before casting, under certain conditions, adding a certain amount of inoculant to the liquid alloy can change the solidification process of the steel making and improve the crystal structure as as to achieve the purpose of updating the performance of the iterative casting.
The inoculation treatment process of smelting molds is also used in cast steel, cast iron and smelting non-ferrous alloys. For example, adding inoculant, it can make molten iron generate a large amount of uniformly distributed crystal nucleus simultaneously so as to obtain fine and uniform graphite. And the matrix is refined in order to improve the strength of the gray cast iron. In some cases, adding inoculant can be used as a mechanical barrier. They adsorb on the surface of the nucleus, hinder the growth of the nucleus and also play a role in refining the grains. For instance, the aluminum silicon alloy adds a small amount of sodium before crystallization. Salt can double the strength of aluminum silicon alloy castings and increase the elongation by nearly three times.