High-strength economically alloyed corrosion-resistant steels with the structure of nitrogen martensite

10th International School-Conference on Materials for Extreme Environment: Development, Production and Application

Bannykh, O.^1 ; Blinov, V.^1 ; Lukin, E.^1

Institute of Metallurgy and Material Science, RAS, Leninskiy av. 49, Moscow

119991, Russia^1

关键词: Corrosion-resistant;    Corrosion-resistant steel;    Delta ferrite;    High nitrogen steels;    Nitrogen martensite;    Nitrogen-containing steels;    Physical metallurgy;    Processability;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/130/1/012001/pdf
DOI  :  10.1088/1757-899X/130/1/012001

来源: IOP

【 摘 要 】

The use of nitrogen as the main alloying element allowing one both to increase the corrosion resistance and mechanical properties of steels and to improve their processability is a new trend in physical metallurgy of high-strength corrosion resistant steels. The principles of alloying, which are developed for high-nitrogen steel in IMET RAS, ensure the formation of the structure, which contains predetermined amounts of martensite (70-80%) and austenite (20-30%) and is free from δ-ferrite, σ-phase, and Cr23C6carbide. These principles were used as the base for the creation of new high-strength corrosion-resistant weldable and deformable 0Kh16AN5B, 06Kh16AN4FD, 08Kh14AN4MDB, 09Kh16AN3MF, 27Kh15AN3MD2, 40Kh13AN3M2, and 19Kh14AMB steels, which are operative at temperatures ranging from - 70 to 400°C. The developed nitrogen-containing steels compared with similar carbon steels are characterized by a higher resistance to pitting and crevice corrosion and are resistant to stress corrosion cracking. The new steels successfully passed trial tests as heavy duty articles.