Studying the Depth of Carbonifying Castings Obtained by the Lost Foam Casting Method with a Complex Polystyrene Composition

Abstract

At present, lost foam casting method is an updated, long-term and the most economically feasible method in the foundry industry. Despite the fact that the casting technique is relatively simple, high demands are placed on the model materials. Carburization of the surfaces of steel castings obtained by the lost foam casting method is one of the main and the most significant problems in the use of this casting method. One solution is to use a complex composition of the material: a combination of cast and construction polystyrene. It was determined that the complex composition of the cast and construction polystyrene model in the ratio of 60 to 40% helps to reduce the depth of carburization and the percentage of internal defects. In addition, the cost of 1 kg of the complex composition models is 25% lower than the cost of 1 kg of models made of cast polystyrene.