Abstract: Austenitic steels alloyed with nitrogen are a new structural and multifunctional material, significantly superior to traditional ones in terms of their range of properties, saving Ni and Mo, and capable of meeting the requirements for modern high-duty products. This article studies just this kind of steel Kh21AG16N8MFL with 0.5 % nitrogen, cast type, high-strength and corrosion-resistant (developed by IMMS RAS). Cast steel is characterized by segregation heterogeneity of the chemical composition and the texture of coarse-grained metal; its structure may be porous. However, the main method of processing used for cast steel is heat treatment. The article compares the mechanical properties, structure, and phase composition of samples of this steel after traditional heat treatment (high-temperature annealing and hardening) and aeroacoustic treatment at room temperature in different modes, developed at Baltic State Technical University “VOENMEH”. A positive effect of aeroacoustic treatment has been revealed to ensure consistently high strength of cast steel while maintaining good ductility. The proven application of cold isostatic pressing, used for powder materials to reduce porosity, in combination with the latter treatment does not improve the structure and properties.

Keywords: mechanical properties, structure, austenite, heat treatment, aerothermoacoustic treatment

For citation: Remshev E. Yu., Kostina M. V., Vorobyova G. А., Kudryashov A. E., Afimyin G. O., Remsheva A. E. Research of the effects of heat and aeroacoustic treatment on the structure and properties of cast steel 05Kh21AG16N8MFBL. Aerospace Engineering and Techno¬logy. 2023. Vol. 1, no. 3, pp. 145–155. EDN FEISII