Elkem has developed an alloy which may be added to the furnace during melting to stabilise the nuclei within the iron. This is called Preseed® preconditioner.
By creating and stabilising long lasting particles which may then form the basis of nucleation, Preseed® preconditioner has been seen to give marked increases in the mechanical properties of castings as well as improvements to the graphite morphology / matrix. With careful use of Preseed®, foundries have been able to reduce expensive pig iron additions, create more stable and consistent castings and reduce overall costs.
There are very few dedicated preconditioners for cast irons available on the market. The need for more consistent base iron is increasing as the casting quality demands become more stringent. Based on fundamental research, Elkem has developed the preconditioner Preseed®. This has been demonstrated to improve the final casting properties of the iron and have a longevity far superior to other so-called preconditioning agents, such as silicon carbide or high barium containing ferrosilicons.
Preseed® has been shown to achieve a long lasting increase in the nucleation levels, raising the low eutectic temperature, reducing the degree of recalescence and increasing the graphite precipitation phase of the freezing cycle. The result in ductile irons is an increase in the nodule count and improvements in the resulting mechanical properties and shrinkage tendency.
In grey irons, Preseed® has been shown to improve graphite morphologies, reduce shrinkage and chilling tendencies, and improve mechanical properties. Elimination of undesirable graphite forms, such as type D and E graphites, has been achieved.
Preseed® is registered trademarks of Elkem AS
PS: Please contact us follow info for more details about our ELKEM brand products.
Ekspert Mümessillik Tur. ve Tic. Ltd. Şti.
Phone: (216) 573 3888