Abstract
To predict the durability of casting molds made of SCh20 cast iron under thermal fatigue during its filling by liquid metal the thermocyclic strength of the casting molds metal (grade SCh20 gray cast iron, analog of A48-30B AISI cast iron) was investigated. The specimens were tested by cyclic heating in the furnace to maximum temperatures from 700°С to 1000°C with following cooling in air and water. The Coffin equation and the dependence of crack growth rate in specimens are obtained on the basis of metallographic measurements of crack length in specimens and strain ranges FEM calculations. The investigations results allow one to predict the durability of casting molds made of SCh20 cast iron under thermal fatigue during its filling by liquid metal.
Published Version
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