Inoculante da fonderia (FeSiZr)

FeSiZr is a zirconium-bearing ferrosilicon inoculant for grey and ductile cast iron. Added to the molten metal just before or during pouring, its Si 73-78% matrix carries active elements — Zr 1-3%, Ca 0.8-1.5%, Al 0.8-1.5%, Mn 1-3% — that form oxide and oxysulfide micro-sites. These nuclei seed graphite precipitation during eutectic solidification, suppressing carbides and chill. In grey iron this favours fine, evenly distributed Type A flake; in ductile iron it raises nodule count and density and improves nodularity, rather than forming the nodular shape itself, which the Mg treatment governs. The Zr and Mn fractions also deoxidize and scavenge residual nitrogen, reducing pinhole and fissure defects in thicker sections. Foundries running grey iron, ductile iron, and section-sensitive castings use FeSiZr where late fade is a problem: the Zr-stabilized nuclei resist dissolution, holding nucleation potential well past the typical inoculation window. Standard ladle addition runs 0.1-0.4 wt% (1-4 kg/t); finer 0.2-0.7 mm grades suit in-stream and late inoculation, while 1-3 mm serves ladle dosing. Every lot ships with COA and MTC. Multi-regional sourcing supports CIF Marmara delivery and Gebze bonded stock, 20 MT FCL or 5 MT LCL. Send grade and quantity for an RFQ.

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