FIELD: technological processes.
SUBSTANCE: invention relates to foundry production, namely, to obtaining castings from metal alloys with a surface alloyed layer using the full-mold process. This method includes manufacturing a model of expanded polystyrene and applying a powdery dopant composition onto the surface of the model, which contains polystyrene foam in an amount of 0.1 to 40 % by weight of the dry powdery dopant composition. Styrofoam is added to the alloying composition in the form of a material crushed to the required fraction or pre-expanded granules. To form a doped layer of a given depth, the alloying composition is introduced into the technological grooves previously made in the surface of the models. Substrates are installed on the surface of the grooves with the dopant composition.
EFFECT: improved adhesion of the doped layer to the surface of the casting is provided.
5 cl, 6 ex
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