Gray cast iron inoculant
A ferrosilicon inoculant for gray cast iron containing between 0.1 to 10% by weight strontium, less than 0.35% by weight calcium, 1.5 to 10% by weight aluminum and 0.1 to 15% zirconium, The inoculant, method for producing the inoculant, method for inoculating the melt and a gray cast iron inoculated with the inoculant are covered.
1. A ferrosilicon inoculant for cast iron consisting of
about 15 to 90% by weight silicon;
about 0.1 to 10% by weight strontium;
less than about 0.35% by weight calcium;
about 1.5 to 10.0% by weight aluminum;
about 0.1 to 15% by weight zirconium, and
a balance of iron with residual impurities.
2. The ferrosilicon inoculant according to claim 1 , wherein the silicon is present in an amount of about 40 to 80% by weight.
3. The ferrosilicon inoculant according to claim 1 , wherein the aluminum is present in about 2-6% by weight.
4. The ferrosilicon inoculant according to claim 1 , wherein the aluminum is present in about 2-4% by weight.