Heat treatment and its influence on the structure and performance characteristics of high strength high-nitrogen martensitic structural steel

Dulnev K.V., Sevalnev G.S., Ulyanov E.I., Oblivantsev K.D.
UDC
669.15
DOI
10.18577/2307-6046-2026-0-3-23-32
Article PDF (Russian) (1.15 MB)
How to cite
Dulnev K.V., Sevalnev G.S., Ulyanov E.I., Oblivantsev K.D. Heat treatment and its influence on the structure and performance characteristics of high strength high-nitrogen martensitic structural steel // Proceedings of VIAM. 2026. No. 3. DOI: 10.18577/2307-6046-2026-0-3-23-32. URL: https://test.viam.ru/en/journal/2026/3/2
Keywords
high nitrogen steels, super-equilibrium nitrogen content, heat treatment, microstructure, hardness, construction steel
Abstract

The work studies the microstructure, hardness, and tribological properties of a high-strength, high-nitrogen, martensitic-class structural steel. It has been found that the steel's structure consists of martensite, residual austenite, and excess nitride phases. The steel's hardness on the Rockwell scale ranges from 48,5 to 52,5 HRC, and on the Vickers scale it ranges from 580 to 640 HV5. Tribological tests were conducted, resulting in a minimum average coefficient of friction of 0,45 and a minimum wear rate of 0,7∙10-4 mm3/(N∙m).

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