Method of using iron modifier

摘要

An iron modifier containing, percent by weight; Silicon 25 to 50 Rare-earth metals 20 to 40 Carbon 10 to 30 Sulphur 0.1 to 0.3 Iron the balance, the components being added into liquid iron in the form of a mixture of alloys and foundry coke in the following proportions, percent by weight: silico-mishmetal 70 to 90 foundry coke 10 to 30; and this mixture is introduced in an amount of from 0.3 to 0.5% by weight. The modifier according to the present invention makes it possible to produce thin-walled iron castings without the formation of cementite on the surface thereof.