Patent ID: 7569092
Filing Date: 2009-08-04
Classification: B22D,C21C,C22C

Abstract:
1. An inoculant blend for the treatment of liquid cast iron, consisting of 5 to 75% by weight of at least one alloy of type A based on ferro-silicon such that Si/Fe>2, containing, by weight, 0.005 to 3% rare earths (RE), 0.05 to 3% bismuth, lead and/or antimony, and less than 3% calcium, with a (Bi+Pb+Sb)/RE ratio of between 0.9 and 2.2 per 25 to 95% of at least one alloy of type B based on silicon or ferro-silicon such that Si/Fe>2, containing less than 0.01% bismuth and calcium with a content greater than that of alloy A, such that the total calcium content of the blend is between 0.3 and 3%.