Influence of exothermic and modificating additives on the structure and characteristics of gray cast iron of cupola heat

Abstract

In the real conditions of casting houses there is developed the technology of temperature raise of synthetic or half-synthetic hypoeutectic gray cast iron of cupola heat by 1525 C at insertion into bowl of 0,25% exothermal additive (EA), consisting of aluminium with iron oxide in proportion 1:3. At that there is guaranteed the production of the high quality castings with characteristics not below SCh20, solidity not higher of 229 HB, absence of spoilage on blow-holes and chills in thin cuts.