Features of silicon saturation of austenite pipe steel samples with different operating time

Abstract

In the oil refining and petrochemical industries, the problem of premature failure of furnace equipment operating at high operating temperatures due to diffusion saturation of metal with structural elements with carbon is quite acute. Sections of coils of reaction furnaces operating under severe temperature conditions are especially often rejected due to carburization. The carbon saturation of the surface layers of the metal of the pipes to different depths leads to a change in the chemical composition and mechanical properties, and as a result, to a significant deterioration in plasticity, which increases the tendency to crack. One of the most significant causes of carburization of the metal of furnace tubes is coco-deposition along the inner surface of the tubes and this leads to a more intensive rotation of the mechanism of diffusion of carbon into the metal from coke. The rate and degree of carburization can be reduced or in some cases even prevented from forming surface modified silicon-based layers since it is silicon that is a carbon antagonist. In this regard, the current topic is the study of the features of silicon saturation of the surface layer of samples of austenitic pipe steel with different operating time.