High-temperature internal nitriding of heavy-section steel products

5th International Conference New Achievements in Materials and Environmental Science

材料科学;生态环境科学

Khatkevich, V.^1 ; Nikulin, S.^1 ; Rogachev, S.^1 ; Sergeychev, A.^1

National University of Science and Technology MISIS, Leninsky pr. 4, Moscow

119049, Russia^1

关键词: Chromium nitride;    Corrosion-resistant steel;    Grain size;    Heavy sections;    High temperature;    Monolithic material;    Thin sheet;    Uniform distribution;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/879/1/012008/pdf
DOI  :  10.1088/1742-6596/879/1/012008

来源: IOP

【 摘 要 】

A method for the internal nitriding of 0.08C-17Cr-0.5Ti corrosion-resistant steel sheets more than 2.5 mm thick has been suggested. The procedure includes the high-temperature nitriding of thin sheets, their hot pressing, and annealings. After such a treatment, the microhardness magnitude demonstrates the uniform distribution across the sheet section and reaches 280 HV. The formed structure of the material is characterized by a grain size of 0.5 μm and the presence of chromium-nitride particle precipitates. Compression tests showed that the prepared samples are deformed as a monolithic material; no cracks and laminations are formed on the surface.