SU559990A1 - Modifier - Google Patents

Description

its physical and mechanical properties and reduce the tendency of iron to chill. The tensile strength of cast iron modified by the proposed modifier is 89.8– 91.2 kg / mm, the relative elongation is 4.5–6.6%, and the impact strength is 2.6– 3.8 kgm / cm.

Example. The cast iron is melted in a 100 kg induction tank. Modifying

cast iron is carried out in a ladle, to the bottom of which, before the metal is released, the modifier is prevented in the amount of 2% by weight of the liquid iron. The modified cast iron has a pearlitic structure with a content of up to 20% ferrite and a spherical shape of graphite.

The composition of the proposed modifiers and properties of the modified iron are given in table. 1 and 2 respectively.

Table I

table 2

Claims (1)

Invention Formula A modifier containing magnesium, calcium, rare earth metals, iron, nickel, manganese, copper, carbon and silicon, characterized in that, in order to improve the physical and mechanical properties of cast iron, it tons of barium with the following components, weight. %: 5-10 5-15 1-10 1-15 10-20 10-20 10-20 0.5-6 O 1 o Rest Taken at V12444433, Cl. 18B 1/08, No. 2152243, cl. C 22C