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Karbosil SiC
KARBOSIL is used in the production of ferrous alloys, particularly grey and ductile iron, to increase the silicon and carbon content. Its addition to the molten metal also promotes important metallurgical reactions that facilitate graphite nucleation and precipitation during solidification. The resulting optimal graphite size and distribution improve the mechanical properties and machinability of the castings.
KARBOSIL also has a strong deoxidising and melt-cleansing effect, significantly reducing gas porosity and microscopic non-metallic inclusions in the solidified casting.
Inoculants
Inoculation is a treatment process in which finely granulated chemical elements or alloys in solid form are added to molten metal shortly before pouring into the mould.
The most effective inoculants are alloys containing elements with a high affinity for oxygen and sulphur, such as silicon, aluminium, calcium, barium, strontium, zirconium, magnesium and rare-earth elements. The products formed during the deoxidation of ferrous melts by these elements act as microscopic nucleation sites on which graphite begins to precipitate during solidification.
The principal purpose of melt inoculation is to influence and control the solidification process and, consequently, the microstructure, which directly determines the mechanical properties of the casting.
Ferro legure
Ferroalloys are iron-based alloys containing significant proportions of one or more additional elements, such as silicon (FeSi), manganese (FeMn), chromium (FeCr), phosphorus (FeP), nickel (FeNi), tungsten (FeW), vanadium (FeV) and titanium (FeTi). They are used primarily in the production of cast irons and steels.
The individual alloying elements contained in ferroalloys influence metallurgical processes and reactions, as well as the strength, mechanical properties and corrosion resistance of ferrous alloys.
Nodulators
Nodularisers are alloys containing elements that cause graphite in cast iron to precipitate in nodular or spheroidal form. This graphite morphology significantly improves the mechanical properties and machinability of the material.
The most widely used nodularisers are FeSiMg-based alloys with varying magnesium contents, owing to their high treatment efficiency and the reliability they provide in the production of ductile iron.
Slug skimming agent
PEŽE slag skimming agent—also referred to as a slag coagulant or slag remover—is a specially formulated granular product applied to the surface of molten metal. It binds, dries and coagulates liquid droplets and viscous impurities present on the melt surface.
The coagulated non-metallic particles, oxides and other impurities float to the surface and form a solid or semi-solid crust that can be easily skimmed off. This prevents slag from adhering to the furnace lining or entering the mould during pouring, thereby reducing undesirable slag inclusions and porosity in castings.
Other Exothermic Compounds
Exothermic covering compounds for foundries and steelworks are auxiliary materials applied to the surface of molten metal in feeding systems (risers) to reduce heat loss and extend the time the metal remains liquid. They are used similarly on steel ingot heads.
During the exothermic reaction, they release additional heat, helping to maintain the temperature of the molten metal and prevent cold spots or premature solidification. Proper use of exothermic covering compounds improves metal yield, ensures casting-process stability, and enhances casting quality.